DESCRIPTION
Title of Invention
FIELD DISPLAY SYSTEM, FIELD DISPLAY METHOD, AND FIELD
DISPLAY PROGRAM
5
Technical Field
[OOOl]
The present invention relates to a field display
system, a field display method and a field display program
10 which specify a field of a camera which can capture an
image of a target to be monitored well and display this
field.
Background Art
15 [0002]
Patent Literature 1 discloses a technique of
displaying an image capturing range of a camera. According
to the technique disclosed in Patent Literature 1, when,
for example, a camera position is specified on a top view
20 of a predetermined area displayed on a display apparatus, a
horizontal field of view, which is a projected image
capturing range of the camera, is displayed on this top
view, and a vertical field of view, which includes an
optical axis of the camera and is a field of view of the
25 camera in a plane vertical to a horizontal plane, is
displayed in an elevation view. Fig. 34 is a schematic
view illustrating a horizontal field of view and a vertical
field of view displayed by the technique disclosed in
Patent Literature 1.
30 [0003]
According to the technique disclosed in Patent
Literature 1, when, for example, a camera position is
specified on a top view 100, a camera indicator 101
representing a camera is displayed on the top view 100.
Further, a user adjusts the height of the camera by
dragging a camera indicator 111 displayed in an elevation
view 107. When the camera position is specified, the
calculated horizontal field of view 105 is displayed on the
5 top view 100, and the vertical field of view 115 is
displayed on the elevation view 107. The vertical field of
view 115 includes an optical axis 110 of the camera.
Further, when an icon of a person is dragged and dropped on
the top view 100, a person indicator 102 is displayed at
10 this position, and a person indicator 112 is also displayed
in the elevation view 107. Similarly, by specifying a
position at which a wall as an obstacle for the camera
exists, a wall indicator 103 is displayed in the top view.
In addition, in Fig. 34, a person indicator in the top view
15 100 is assigned a reference numeral "102", and a person
indicator in the elevation view 107 is assigned a reference
numeral "112".
[0004]
According to the technique disclosed in Patent
20 Literature 1, the above display is provided to present a
relationship between fields of view of the camera, and a
wall and a person in a predetermined area to adjust an
arrangement position of the camera.
25 Citation List
Patent Literature
[OOOS]
PLT 1: Japanese Patent Application Laid-Open No.
2009-239821
30
Summary of Invention
Technical Problem
[0006]
However, according to the technique disclosed in
Patent Literature 1, it is not possible to explicitly
display a range in which the camera can capture an image of
the entire target to be monitored (a person in this
example). For example, in the top view 100 illustrated in
5 Fig. 34, the person indicator 102 is within the horizontal
field of view 105. However, this does not necessarily mean
that the camera can capture an image of the entirety of the
person. In an example illustrated in Fig. 34, only a
portion corresponding to the feet of the person indicator
10 112 in the elevation view 107 is within the vertical field
of view 115. Hence, only an image of the feet of the
person is captured. To find a range in which the camera
can capture an image of the entirety of the person, it is
necessary to manually drag the person indicator 102, check
15 both of the top view 100 and the elevation view 107 and
specify a range in which the person indicator is included
in both of the horizontal field of view 105 and the
vertical field of view 115. Further, it is preferable to
determine an optimal arrangement state of the camera so as
20 to maximize a range in which the camera captures an image
of the entirety of the person. However, according to the
technique disclosed in Patent Literature 1, to specify such
a range, while changing the arrangement state of the camera,
a range in which the camera can capture an image of the
25 entirety of a person is manually specified. Hence, an
operation burden is heavy, and it is difficult to determine
an optimal arrangement state of the camera. Particularly
when there is a plurality of cameras, it is more difficult
to adjust each camera in a good arrangement state.
30 [0007]
Further, according to the technique disclosed in
Patent Literature 1, only the vertical field of view 115 in
the plane including the optical axis 110 is displayed as
the vertical field of view 115. Hence, even when an
obstacle such as the wall indicator 103 is arranged in a
direction other than the optical axis in the top view 100,
it is not possible to explicitly display whether a person
hides behind this obstacle.
5 [OOOS]
It is therefore an object of the present invention to
provide a field display system, a field display method and
a field display program which can intelligibly present to a
user a range in which a camera can capture an image of an
10 entire target to be monitored or a certain part or more of
the target to be monitored.
Solution to Problem
[0009]
15 A field display system according to the present
invention includes: projecting means configured to project
a position in an image captured by a camera, on a plurality
of monitoring domains obtained by moving, in parallel, a
region to be monitored which defines a range to be checked
20 for an image capturing situation of the camera, the
monitoring domain being determined based on a height of a
target to be monitored, an image of which is captured by
the camera, and to specify fields of the plurality of
monitoring domains as a range an image of which the camera
25 captures without being blocked by an obstacle; integrating
means configured to integrate the fields in the monitoring
domains; and display control means configured to cause a
display apparatus to display an integration result of the
fields .
30 [OOlO]
Further, a field display system according to the
present invention includes: projecting means configured to
project a position in an image captured by a camera, on a
plurality of monitoring domains obtained by moving, in
parallel, a region to be monitored which defines a range to
be checked for an image capturing situation of the camera,
the monitoring domain being determined based on a height of
a target to be monitored, an image of which is captured by
5 the camera, and to specify fields of the plurality of
monitoring domains as a range an image of which the camera
captures without being blocked by an obstacle; segmenting
means configured to segment each monitoring domain based on
how many fields of cameras each monitoring domain
10 corresponds to; and display control means configured to
cause the display apparatus to display each monitoring
domain to display a region segmented in an individual
monitoring domain according to a mode which supports the
number of cameras which include the region in the fields.
15 [OOll]
Further, a field display method according to the
present invention includes: projecting a position in an
image captured by a camera, on a plurality of monitoring
domains obtained by moving, in parallel, a region to be
20 monitored which defines a range to be checked for an image
capturing situation of the camera, the monitoring domain
being determined based on a height of a target to be
monitored, an image of which is captured by the camera, and
specifying fields of the plurality of monitoring domains as
25 a range an image of which the camera captures without being
blocked by an obstacle; integrating the fields in the
monitoring domains; and causing a display apparatus to
display an integration result of the fields.
[0012]
3 0 Furthermore, a field display method according to the
present invention includes: projecting a position in an
image captured by a camera, on a plurality of monitoring
domains obtained by moving, in parallel, a region to be
monitored which defines a range to be checked for an image
capturing situation of the camera, the monitoring domain
being determined based on a height of a target to be
monitored, an image of which is captured by the camera, and
specifying fields of the plurality of monitoring domains as
5 a range an image of which the camera captures without being
blocked by an obstacle; segmenting each monitoring domain
based on how many fields of cameras each monitoring domain
corresponds to; and causing the display apparatus to
display each monitoring domain to display a region
10 segmented in an individual monitoring domain according to a
mode which supports the number of cameras which include the
region in the fields.
[0013]
Furthermore, a field display program according to the
15 present invention causes a computer to execute: projection
processing of projecting a position in an image captured by
a camera, on a plurality of monitoring domains obtained by
moving, in parallel, a region to be monitored v~hich defines
a range to be checked for an image capturing situation of
20 the camera, the monitoring domain being determined based on
a height of a target to be monitored, an image of which is
captured by the camera, and specifying fields of the
plurality of monitoring domains as a range an image of
which the camera captures without being blocked by an
25 obstacle; integration processing of integrating the fields
in the monitoring domains; and display control processing
of causing a display apparatus to display an integration
result of the fields.
[0014]
30 Still further, a field display program according to
the present invention causes a computer to execute:
projection processing of projecting a position in an image
captured by a camera, on a plurality of monitoring domains
obtained by moving, in parallel, a region to be monitored
which defines a range to be checked for an image capturing
situation of the camera, the monitoring domain being
determined based on a height of a target to be monitored,
an image of which is captured by the camera, and specifying
5 fields of the plurality of monitoring domains as a range an
image of which the camera captures without being blocked by
an obstacle; segmentation processing of segmenting each
monitoring domain based on how many fields of cameras each
monitoring domain corresponds to; and display control
10 processing of causing a display apparatus to display each
monitoring domain to display a region segmented in an
individual monitoring domain according to a mode which
supports the number of cameras which include the region in
the fields.
15
Advantageous Effects of Invention
[0015]
According to the present invention, it is possible to
intelligibly present to a user a range in which a camera
20 can capture an image of an entire target to be monitored or
a certain part or more of the target to be monitored.
Brief Description of Drawings
[0016]
25 [Fig. I] It depicts a block diagram illustrating an
exemplary configuration of a field display system according
to a first exemplary embodiment of the present invention.
[Fig. 21 It depicts a schematic view illustrating an
example of a monitoring domain.
30 [Fig. 31 It depicts an explanatory view illustrating a
coordinate system of an image.
[Fig. 41 It depicts a schematic view illustrating an
example of a positional relationship between the position
of each camera determined based on camera parameters and a
monitoring domain.
[Fig. 51 It depicts an explanatory view illustrating a
result obtained by projecting an image region of each
camera illustrated in Fig. 4, on each monitoring domain.
5 [Fig. 61 It depicts an explanatory view schematically
illustrating integration of fields according to the first
exemplary embodiment.
[Fig. 71 It depicts a flowchart illustrating an example of
steps of processing according to the first exemplary
10 embodiment of the present invention.
[Fig. 81 It depicts an explanatory view illustrating a
display example of an integration result of fields
according to the first exemplary embodiment.
[Fig. 91 It depicts a block diagram illustrating an
15 exemplary configuration of a field display system according
to a second exemplary embodiment of the present invention.
[Fig. 101 It depicts an explanatory view schematically
illustrating integration of fields according to the second
exemplary embodiment.
20 [Fig. 111 It depicts a flob~chart illustrating an example of
steps of processing according to the second exemplary
embodiment.
[Fig. 121 It depicts an explanatory view illustrating a
display example of an integration result of fields
25 according to the second exemplary embodiment.
[Fig. 131 It depicts an explanatory view illustrating an
example of highlighting a region corresponding to a field
rate falling within a specific numerical value range.
[Fig. 141 It depicts an explanatory view illustrating
30 another example of highlighting.
[Fig. 151 It depicts a block diagram illustrating an
exemplary configuration of a field display system according
to a third exemplary embodiment of the present invention.
[Fig. 161 It depicts an explanatory view illustrating a
calculation example of an average field rate.
[Fig. 171 It depicts a flowchart illustrating an example of
steps of processing according to the third exemplary
embodiment.
5 [Fig. 181 It depicts a block diagram illustrating an
exemplary configuration of a field display system according
to a fourth exemplary embodiment of the present invention.
[Fig. 191 It depicts a flowchart illustrating an example of
steps of processing according to the fourth exemplary
10 embodiment of the present invention.
[Fig. 201 It depicts an explanatory view illustrating an
example of a segmentation result of monitoring domains.
[Fig. 211 It depicts an explanatory view illustrating an
example of a segmentation result of monitoring domains.
15 [Fig. 221 It depicts an explanatory view illustrating an
example of a segmentation result of monitoring domains.
[Fig. 231 It depicts an explanatory view illustrating an
example of a display format in step S22.
[Fig. 241 It depicts an explanatory view illustrating an
20 example of highlighting according to the fourth exemplary
embodiment.
[Fig. 251 It depicts an explanatory view illustrating an
example of highlighting according to the fourth exemplary
embodiment.
25 [Fig. 261 It depicts a block diagram illustrating another
exemplary configuration of the field display system
according to the fourth exemplary embodiment of the present
invention.
[Fig. 271 It depicts an explanatory view illustrating an
30 example of highlighting in a case where a camera is
specified.
[Fig. 281 It depicts a block diagram illustrating an
example of main components according to the present
invention.
[Fig. 291 It depicts a block diagram illustrating another
example of main components according to the present
invention.
[Fig. 301 It depicts a block diagram illustrating a
5 configuration of a field display system according to a
fifth exemplary embodiment.
[Fig. 311 It depicts a block diagram illustrating another
exemplary configuration of the field display system
according to the present invention.
10 [Fig. 321 It depicts a block diagram illustrating another
exemplary configuration of the field display system
according to the present invention.
[Fig. 331 It depicts an explanatory view illustrating an
example in which virtual planes are not parallel to a
15 region to be monitored.
[Fig. 341 It depicts a schematic view illustrating a
horizontal field of view and a vertical field of view
displayed by a technique disclosed in Patent Literature 1.
20 Description of Embodiments
[0017]
Hereinafter, exemplary embodiments of the present
invention will be described with reference to the drawings.
[0018]
25 First Exemplary Embodiment
Fig. 1 depicts a block diagram illustrating an
exemplary configuration of a field display system according
to a first exemplary embodiment of the present invention.
A field display system 1 according to the present invention
30 includes an information registering unit 2, an information
memory unit 3, a monitoring domain determining unit 4, a
projecting unit 5, an integrating unit 6, and a display
control unit 7.
[0019]
The information memory unit 3 is a memory device
which stores information (camera parameters) related to a
camera such as an arrangement position, a posture, an angle
of view and lens distortion of the camera, a screen size of
5 the camera, information which indicates a region to be
monitored, information related to a target to be monitored
such as a position and a height of the target to be
monitored, an image of which is captured by the camera, and
information related to an obstacle such as a position and a
10 height of the obstacle arranged in the region to be
monitored. The information registering unit 2 receives,
for example, an input of these pieces of information by a
user operation, and the information registering unit 2
stores the input information in the information memory unit
15 3. A case will be described as an example below where a
target to be monitored is a person. Further, when a
plurality of cameras is assumed, the user inputs camera
parameters per camera, and the information registering unit
2 stores the camera parameters of each camera in the
20 information memory unit 3.
[0020]
The region to be monitored is a domain which defines
a range to be checked for an image capturing situation of
the camera, and is determined as a domain in a horizontal
25 plane. A three-dimensional space, which is determined by
moving this region to be monitored in parallel in the
vertical direction, is defined as a range to be checked for
an image capturing situation of the camera. For example, a
domain of a floor of a room in which cameras are installed
30 may be defined as a region to be monitored. In this
example, a three-dimensional space determined by moving
this region in parallel upward in the vertical direction is
a range to be checked for an image capturing situation.
[0021]
The monitoring domain determining unit 4 refers to
information which indicates a region to be monitored stored
in the information memory unit 3 and information related to
the target to be monitored, and determines a plurality of
5 monitoring domains based on a height of the target to be
monitored. A monitoring domain is a domain determined by
moving a region to be monitored in parallel. Hence, the
size of the monitoring domain is the same as that of the
region to be monitored. The monitoring domain determining
10 unit 4 determines a plurality of monitoring domains in a
range from the vicinity of a lower end (for example, the
toe of the person) of the target to be monitored to the
vicinity of an upper end (for example, the head of the
person) of the target to be monitored. A plurality of
15 monitoring domains includes a monitoring domain in the
vicinity of a lower end of a target to be monitored and a
monitoring domain in the vicinity of an upper end thereof.
Fig. 2 depicts a schematic view illustrating an example of
a monitoring domain. In an example illustrated in Fig. 2,
20 information which indicates a region to be monitored 11,
information which indicates a person 13, and information
which indicates an obstacle 12 are stored in the
information memory unit 3. Further, Fig. 2 illustrates a
case where the monitoring domain determining unit 4
25 determines three monitoring domains ho to h2 in the range
from the vicinity of the lower end of the person 13 to the
vicinity of the upper end thereof. In this example, the
monitoring domain ho at the lower end of the person 13 is
the same region as the region to be monitored 11.
30 100221
Next, the projecting unit 5 will be described. First,
a coordinate system and an image region of an image
captured by the camera will be described. When the camera
parameters and the screen size of the camera are determined,
a two-dimensional coordinate system of an image obtained by
this camera (an image captured by the camera), and a region
corresponding to this image in this coordinate system are
determined. This region is referred to as an image region.
5 An image region is a region which indicates an entire
screen of an image captured by the camera. An image region
is determined per camera.
[0023]
Fig. 3 depicts an explanatory view illustrating a
10 coordinate system of an image captured by the camera. As
illustrated in Fig. 3, a random position 32 in the image
captured by the camera is represented as a coordinate of an
xy coordinate system (that is, the two-dimensional
coordinate system) in front of the camera. Further, the
15 image region 31 is a region which indicates an entire
screen of this image, and is a region in this xy coordinate
system. According to the camera parameters and the screen
size, the image region 31 is determined.
[0024]
20 Further, calculating, from a line which passes a
camera position and a position in the image region 31, a
coordinate in a three-dimensional space corresponding to
this position in the image region 31 is referred to as
"projection". For example, calculating a position 33 in
25 the three-dimensional space corresponding to the position
32 in the image region 31 represented by the twodimensional
coordinate corresponds to projection.
Projection can be realized by converting the twodimensional
coordinate, which represents the position in
30 the image region 31, into the three-dimensional coordinate
of real space using camera parameters such as an
arrangement position, a posture, an angle of view, and lens
distortion of the camera.
LO0251
The projecting unit 5 projects the image region 31 on
each monitoring domain per camera. Fig. 4 depicts a
schematic view illustrating an example of a positional
relationship between a position of each camera determined
5 based on camera parameters and a monitoring domain. For
example, the projecting unit 5 projects the image region 31
(see Fig. 3) of the camera 21 on the monitoring domains ha,
hl, and h2. Similarly, the projecting unit 5 projects the
image regions of the other cameras 22 and 23 on the
10 monitoring domains ha, hl, and hz.
[0026]
Further, the projecting unit 5 refers to information
of a position and a size of an obstacle upon projection,
and determines whether the obstacle exists on a line
15 connecting the camera position and a projection point on a
monitoring domain. Furthermore, upon determining that the
obstacle exists on the line connecting the camera position
and the projection point on the monitoring domain, the
projecting unit 5 determines that the projection point on
20 this monitoring domain is a point at which the camera is
blocked by the obstacle and cannot capture an image.
Meanwhile, upon determining that the obstacle does not
exist on the line connecting the camera position and the
projection point on the monitoring domain, the projecting
25 unit 5 determines that the projection point on this
monitoring domain is a point at which the camera can
capture an image without being blocked by the obstacle.
[0027]
By making the determination as to the projection
30 point on the monitoring domain, the projecting unit 5
specifies a field as a range an image of which the camera
can capture without being blocked by the obstacle in the
monitoring domain.
roo281
Further, the projecting unit 5 preferably
superimposes and displays a range, in which the obstacle
exists, on a monitoring domain on which an image region is
projected. The range in which the obstacle exists may be
5 represented by a specific color (a translucent color).
Further, an outer periphery of the range in which the
obstacle exists may be represented by a specific line type.
[0029]
Fig. 5 depicts an explanatory view illustrating a
10 result obtained by projecting an image region of each
camera illustrated in Fig. 4, on each monitoring domain.
Fig. 5 illustrates a projection result related to the
camera 21, a projection result related to the camera 22,
and a projection result related to the camera 23 from a
15 left column. Further, Fig. 5 illustrates a projection
result related to the monitoring domain hZ, a projection
result related to the monitoring domain hl, and a
projection result related to the monitoring domain ho from
the top row.
20 [0030]
A result of projecting an image region of the camera
on a horizontal plane is a trapezoidal shape. For example,
a result of projecting the image region of the camera 21 on
the monitoring domain hz is a trapezoidal shape ABCD (see
25 Fig. 5). The size of this trapezoid differs depending on
the height of the monitoring domain. As a difference in
height between the camera and the monitoring domain is
greater, the trapezoidal shape which indicates the
projection result is larger. Meanwhile, the projecting
30 unit 5 does not include, in the projection result, a
portion of this trapezoid that goes beyond the monitoring
domain.
[0031]
As described above, the projecting unit 5 preferably
superimposes and displays the obstacle on the monitoring
domain. In an example illustrated in Fig. 5, in each
monitoring domain, a range in which the obstacle 12 exists
is filled by white, and the outer periphery of this range
5 is indicated by a solid line.
[0032]
According to each projection result illustrated in
Fig. 5, a range indicated by diagonal lines represents a
field an image of which the camera can capture without
10 being blocked by the obstacle 12. This field differs from
camera to camera. Further, when focusing on one camera,
the field differs depending on the height of a monitoring
<
domain.
[0033]
15 Furthermore, in each of the monitoring domains ho to
hl illustrated in Fig. 5, a region other than the field and
the obstacle is a range in which the camera is blocked by
the obstacle and cannot capture an image, and a range which
does not correspond to a projection destination of an image
20 region. That is, a range other than a field in a
monitoring domain is a range in which the camera cannot
capture an image of a target to be monitored.
[0034]
The integrating unit 6 integrates fields of cameras
25 specified in respective monitoring domains.
I00351
According to the first exemplary embodiment, the
integrating unit 6 extracts regions corresponding to fields
in all monitoring domains ho to h2 and obtains an
30 extraction result as an integration result of the fields
for each camera.
[0036]
Fig. 6 depicts an explanatory view schematically
illustrating integration of fields according to the first
exemplary embodiment. Fig. 6 illustrates integration of
fields of the camera 22. A field 27 illustrated in Fig. 6
is a field in the monitoring domain h2. Similarly, a field
26 is a field in the monitoring domain hl and a field 25 is
5 a field in the monitoring domain ho. The integrating unit
6 extracts a common region 28 in the fields 25, 26 and 27
in the monitoring domains ho to h2, and determines this
region 28 as an integration result of the fields in the
monitoring domains.
10 [0037]
The fields 25, 26 and 27 represent ranges in which,
at the heights of the monitoring domains corresponding to
these fields, the camera 22 can capture an image of a
target to be monitored without being blocked by an obstacle.
15 Hence, when a target to be monitored exists in the common
region 28 (see Fig. 6) of the fields 25, 26 and 27 in the
monitoring domains ho to h2 of different heights, the
camera 22 can capture an image of the vicinity of the lower
end to the vicinity of the upper end of the target to be
20 monitored. That is, the region 28, which is an integration
result of the fields 25, 26 and 27, can be referred to as a
region in which the camera 22 can capture an image of the
entire target to be monitored.
[00381
2 5 The integrating unit 6 integrates the fields as
described above per camera. Hence, according to the first
exemplary embodiment, the integration result of fields can
be obtained per camera.
[00391
30 The display control unit 7 causes a display apparatus
(not illustrated) to display an integration result of
fields obtained per camera. In addition, the field display
system 1 may have a display apparatus.
[00401
The information registering unit 2, the monitoring
domain determining unit 4, the projecting unit 5, the
integrating unit 6, and the display control unit 7 are
realized by, for example, a CPU of a computer which
5 operates according to a field display program. In this
case, the CPU only needs to read the field display program,
and operate as the information registering unit 2, the
monitoring domain determining unit 4, the projecting unit 5,
the integrating unit 6, and the display control unit 7
10 according to this program. Further, the field display
program may be recorded in a computer-readable recording
medium. Furthermore, the information registering unit 2,
the monitoring domain determining unit 4, the projecting
unit 5, the integrating unit 6, and the display control
15 unit 7 may be respectively realized by different hardware.
[0041]
Next, steps of processing according to the present
exemplary embodiment will be described. Fig. 7 depicts a
flowchart illustrating an example of steps of processing
20 according to the first exemplary embodiment of the present
invention. In addition, it is assumed that in the
information memory unit 3, various pieces information such
as camera parameters have been stored. First, the
monitoring domain determining unit 4 refers to information
25 which indicates a region to be monitored and information
related to a target to be monitored, and determines a
plurality of monitoring domains in a range from the
vicinity of the lower end to the vicinity of the upper end
of the target to be monitored (step Sl). In addition, a
30 plurality of monitoring domains may be determined in
advance, and information on these monitoring domains may be
stored in the information memory unit 3. In this case,
step S1 may be skipped. Further, in this case, the field
display system 1 may not include the monitoring domain
determining unit 4.
[0042]
After step S1, the projecting unit 5 projects an
image region of an image captured by the camera, on each
5 monitoring domain per camera (step S2). Further, in step
52, the projecting unit 5 specifies the region
corresponding to a field in each monitoring domain.
Furthermore, preferably, the projecting unit 5 also
superimposes the range in which an obstacle exists, on each
10 monitoring domain.
[0043]
Next, the integrating unit 6 integrates fields in the
monitoring domains (step S3). According to the present
exemplary embodiment, the integrating unit 6 extracts, as
15 an integration result, a common region of the fields
represented in the respective monitoring domains per camera.
[0044]
The display control unit 7 causes the display
apparatus (not illustrated) to display the integration
20 result of the fields obtained per camera (step 54). Fig. 8
depicts an explanatory view illustrating a display example
of an integration result of fields according to the first
exemplary embodiment. For example, the display control
unit 7 causes the display apparatus to display a region 28,
25 obtained by integrating fields of the camera 22, together
with the region to be monitored 11 as illustrated in Fig. 8.
Further, the display control unit 7 causes the display
apparatus to also display the range in which the obstacle
12 superimposed by the projecting unit 5 exists. Similarly,
30 the display control unit 7 causes the display apparatus to
display integration results of fields of other cameras.
[0045]
According to the first exemplary embodiment, a common
region of fields in monitoring domains of different heights
is extracted and the display apparatus is caused to display
the common region per camera. Consequently, it is possible
to present to a user a range in a region to be monitored in
which it is possible to capture an image of the vicinity of
5 a lower end to the vicinity of an upper end of a target to
be monitored (for example, a person). Therefore, the user
can easily learn the range in the region to be monitored in
which the camera can capture an image of the entire target
to be monitored. Further, by changing camera parameters
10 and checking a change of this range, it is easier to adjust,
for example, a position, a posture and an angle of view of
the camera to maximize this range.
[0046]
In addition, according to the first exemplary
15 embodiment, the number of cameras may be one.
[0047]
Second Exemplary Embodiment
A field display system according to a second
exemplary embodiment visualizes not only a range in which
20 an entire target to be monitored can be seen but also to
what degree a portion of the entire target to be monitored
(for example, the entirety of a person) can be captured by
the camera in the region to be monitored to present to the
user.
25 [0048]
Fig. 9 depicts a block diagram illustrating an
exemplary configuration of the field display system
according to the second exemplary embodiment of the present
invention. The same components as those in the first
30 exemplary embodiment will be assigned the same reference
numerals as those in Fig. 1, and will not be described.
The field display system according to the second exemplary
embodiment includes an integrating unit 6a (see Fig. 9)
instead of the integrating unit 6 (see Fig. 1) according to
the first exemplary embodiment. The integrating unit 6a
includes a field rate calculating unit 61 and a cover rate
calculating unit 63a.
[00491
5 The field rate calculating unit 61 calculates a field
rate per position outside a range in which an obstacle
exists in a region to be monitored 11 (see Fig. 2).
Further, the field rate calculating unit 61 calculates the
field rate per camera.
10 [0050]
The field rate refers to a ratio of the number of
monitoring domains, focused positions of which belong to
fields, to the total number of monitoring domains. In the
example illustrated in Fig. 2, the total number of
15 monitoring domains is "3". Further, focusing on, for
example, a given position in the region to be monitored 11,
although this position belongs to the fields in two
monitoring domains hz and hl, the position does not belong
to the field in the remaining monitoring domain ho. In
20 this case, the field rate calculating unit 61 calculates
the field rate of the focused position as "2/3". The field
rate calculating unit 61 calculates a field rate as
described above per position outside the range in which an
obstacle exists. Meanwhile, the field rate calculating
25 unit 61 does not need to calculate a field rate per densely
continuous position. For example, the field rate
calculating unit 61 may divide the region to be monitored
11 (except the range in which the obstacle exists) per
fixed range, determine a representative position from each
30 divided area, and calculate the field rate at this
representative position. Further, the field rate
calculating unit 61 may determine this field rate as a
field rate of a divided area to which the representative
position belongs.
[0051]
The field rate calculating unit 61 calculates a field
rate per position in the region to be monitored 11 (except
the range in which the obstacle exists), and then specifies
5 a region, corresponding to each field rate, in the region
to be monitored 11. The region of each field rate
specified in this way is an integration result of fields
according to the second exemplary embodiment.
[0052]
10 Fig. 10 depicts an explanatory view schematically
illustrating integration of fields according to the second
exemplary embodiment. Fig. 10 illustrates integration of
fields of the camera 22. The fields 25 to 27 illustrated
in Fig. 10 are the same as the fields 25 to 27 illustrated
15 in Fig. 6, and will not be described. The field rate
calculating unit 61 calculates a field rate per position in
the region to be monitored 11 (except a range in which an
obstacle exists). In this example, there are three
monitoring domains, and the field rates are calculated as
20 "Ow, "1/3", "2/3", and "3/3 = 1". The field rate
calculating unit 61 specifies a region, corresponding to
each of these field rates, in the region to be monitored 11.
In the example illustrated in Fig. 10, a region 73 is a
region of a field rate "3/3 = 1". Further, regions 72 and
25 74 are regions of a field rate "2/3". Furthermore, regions
71 and 75 are regions of a field rate "1/3". The other
regions are regions of a field rate "0".
I00531
Note that a field rate is not calculated for a range
30 in which the obstacle 12 exists. The field rate
calculating unit 61 preferably superimposes the range in
which the obstacle 12 exists, on the region to be monitored
11. The range in which the obstacle exists may be
represented by a specific color (a translucent color).
Further, an outer periphery of the range in which the
obstacle exists may be represented by a specific line type.
This is the same as in the first exemplary embodiment.
Further, the same applies to the following exemplary
5 embodiments.
[0054]
The cover rate calculating unit 63a calculates a
cover rate per camera. The cover rate is a ratio of a sum
of calculated field rates to the number of positions, field
10 rates of which have been calculated in the region to be
monitored 11. That is, the cover rate calculating unit 63a
calculates a cover rate by calculating following equation
(1).
[OOSS]
15 [Math. 11
Sum of calculated field rates
Cover rate=
Number of positions at which field rates have
been calculated in region to be monitored
Equation (1)
[0056]
The cover rate can be a ratio of a region in which a
target to be monitored can be monitored, to the region to
20 be monitored 11.
[0057]
Although the cover rate calculated according to
equation (1) in the second exemplary embodiment can be
referred to as "a cover rate based on field rates", this
25 cover rate is simply referred to as a "cover rate" for ease
of description.
[0058]
Further, the cover rate calculating unit 63a may add
field rates in a specified numerical value range as a
30 numerator on the right side of equation (1) when
calculating the cover rate by calculating equation (1).
That is, the cover rate calculating unit 63a may add only
field rates in the specified numerical value range upon
calculation of the numerator on the right side of equation
(I), ignore field rates outside this numerical value range
5 (for example, regard the field rates as 0) and calculate
the cover rate according to equation (1). A method of
specifying this numerical value range is not limited in
particular. For example, the numerical value range may be
specified by the user inputting the numerical value range
10 of a field rate to the field display system 1.
[0059]
Further, the display control unit 7 causes the
display apparatus to also display a cover rate together
with an integration result of fields.
15 [0060]
The integrating unit 6a (more specifically, the field
rate calculating unit 61 and the cover rate calculating
unit 63a) is realized by, for example, the CPU which
operates according to the field display program.
20 [0061]
Fig. 11 depicts a flowchart illustrating an example
of steps of processing according to the second exemplary
embodiment. Processing in steps S1 and S2 is the same as
that in steps S1 and S2 according to the first exemplary
25 embodiment. According to the second exemplary embodiment,
after step 52, the field rate calculating unit 61
calculates a field rate per position outside a range in
which an obstacle exists, in a region to be monitored 11.
Further, the field rate calculating unit 61 specifies a
30 region corresponding to each of these calculated field
rates in the region to be monitored 11 (step S 5 ) . The
field rate calculating unit 61 performs this processing per
camera. A result in step S5 is an integration result of
fields according to the second exemplary embodiment.
[00621
Next, the cover rate calculating unit 63a calculates
a cover rate by calculating equation (1) (step S6). The
cover rate calculating unit 63a calculates a cover rate per
5 camera.
[00631
Next, the display control unit 7 causes the display
apparatus (not illustrated) to display the integration
result of the fields obtained per camera (step S4). Fig.
10 12 depicts an explanatory view illustrating a display
example of an integration result of fields according to the
second exemplary embodiment. For example, as illustrated
in Fig. 12, the display control unit 7 causes the display
apparatus to display each region specified as a region
15 corresponding to each field rate of the camera 22 according
to a mode which supports this field rate. Examples of
displaying each region according to a mode which supports a
field rate include distinguishing and displaying each
region with a color, a pattern and brightness associated
20 with a field rate. In addition, when a region is
distinguished and displayed, a region may be distinguished
based on matters other than a color, a pattern and
brightness. The same applies to the other exemplary
embodiments. In the example illustrated in Fig. 12,
25 patterns are distinguished among the region 73 of the field
rate "3/3 = I", the regions 72 and 74 of the field rate
"2/3", the regions 71 and 75 of the field rate "1/3", and
the other regions (the regions of the field rate "0").
Further, the display control unit 7 causes the display
30 apparatus to also display the range in which the
superimposed obstacle 12 exists.
[0064]
Furthermore, the display control unit 7 causes the
display apparatus to also display a cover rate as
illustrated in Fig. 12. Note that, although Fig. 12
illustrates an example of directly displaying a cover rate,
a method of displaying a cover rate is not limited in
particular. For example, a cover rate may be displayed by
5 means of a graph which shows a difference between cover
rates of respective cameras, where the horizontal axis may
indicate an identification number of each camera and the
vertical axis may indicate the cover rate.
[0065]
10 According to the second exemplary embodiment, the
display apparatus displays a region corresponding to each
field rate with a color, a pattern and brightness
associated with the field rate. Further, this means that,
as the field rate is higher, an image of a larger portion
15 of a target to be monitored (for example, a person) can be
captured. Consequently, it is possible to intelligibly
present to a user a range in which a camera can capture an
image of the entire target to be monitored or a certain
part or more of the target to be monitored. Consequently,
20 the user can easily learn the range in the region to be
monitored in which the camera can capture an image of the
entirety or most part of the target to be monitored.
Further, by changing information related to the camera and
checking a change of this range, it is easier to adjust,
25 for example, a position, a posture and an angle of view of
the camera to maximize this range.
[0066]
Furthermore, by also displaying a cover rate, it is
possible to present to the user a ratio of a region in
30 which the camera can monitor the target to be monitored, to
the region to be monitored 11.
[0067]
Next, a modified example of the second exemplary
embodiment will be described. In the second exemplary
embodiment, display of a cover rate may be skipped. In
this case, the field display system 1 according to the
second exemplary embodiment may not include the cover rate
calculating unit 63a, and may not execute step S6 (see Fig.
5 11).
[0068]
Further, in the second exemplary embodiment, in step
S4, the display control unit 7 may cause the display
apparatus to highlight a region corresponding to a field
10 rate falling within a specified numerical value range. A
method of specifying this numerical value range is not
limited in particular. The user may input, to the field
display system 1, a numerical value range of a field rate
corresponding to a region to be highlighted, and the
15 display control unit 7 may cause the display apparatus to
highlight a region corresponding to a field rate falling
within the numerical value range specified by the user.
[0069]
Fig. 13 depicts an explanatory view illustrating an
20 example of highlighting a region corresponding to a field
rate falling within a specific numerical value range. For
example, as illustrated in Fig. 12, the display control
unit 7 causes the display apparatus to display each region
corresponding to each field rate. Further, it is assumed
25 that, as the numerical value range of the field rate
corresponding to a region to be highlighted, a range of
"2/3 or more and 1 or less" is specified. In this case,
the region corresponding to the field rate in the range of
"2/3 or more and 1 or less" includes the regions 72 and 74
30 of the field rate "2/3" and the region 73 of the field rate
"1". Hence, as illustrated in Fig. 13, the display control
unit 7 highlights a region obtained by combining the
regions 72 to 74 illustrated in Fig. 12. The region 77
highlighted in an example in Fig. 13 is a region obtained
by combining the regions 72 to 74. Thus, in this modified
example, the display control unit 7 causes the display
apparatus to highlight a specified region, so that it is
possible to explicitly visualize an effective field in
5 which an image of a large portion of a target to be
monitored can be reliably captured. Further, when only "1"
is specified as a numerical value range of the field rate,
a region to be highlighted is the same as an integration
result of fields displayed in the first exemplary
10 embodiment.
[0070]
Furthermore, only "0" may be specified as a numerical
value range of a field rate corresponding to a region to be
highlighted. Fig. 14 depicts an explanatory view
15 illustrating an example of a region to be highlighted in
this case. That is, the region 78 highlighted in the
example illustrated in Fig. 14 is a range corresponding to
the field rate "O", in other words, a range corresponding
to a blind angle of the camera. Thus, by specifying "0" as
20 a numerical value range, the user can visually and clearly
check the range corresponding to the blind angle of the
camera.
[0071]
Note that Figs. 13 and 14 illustrate cases where
25 regions (that is, regions which are not highlighted)
corresponding to field rates outside the specified
numerical value range are uniformly displayed in a
monochromatic manner. Further, as illustrated in Figs. 13
and 14, when performing highlighting, the display control
30 unit 7 preferably causes the display apparatus to also
display a range in which the obstacle 12 exists.
[0072]
Third Exemplary Embodiment
Fig. 15 depicts a block diagram illustrating an
exemplary configuration of a field display system according
to a third exemplary embodiment of the present invention.
The same components as those in the first and second
exemplary embodiments will be assigned the same reference
5 numerals as those in Figs. 1 and 9, and will not be
described. The field display system according to the third
exemplary embodiment includes an integrating unit 6b (see
Fig. 15) instead of the integrating unit 6 (see Fig. 1)
according to the first exemplary embodiment. The
10 integrating unit 6b includes a field rate calculating unit
61, an average field rate calculating unit 62, and a cover
rate calculating unit 63b.
[0073]
The field rate calculating unit 61 is the same as the
15 field rate calculating unit 61 according to the second
exemplary embodiment.
[0074]
The average field rate calculating unit 62 calculates
an average field rate per position outside a range in which
20 an obstacle exists, in a region to be monitored 11 (see Fig.
2).
[0075]
As described above, the field rate calculating unit
61 does not need to calculate a field rate per densely
25 continuous position. The average field rate calculating
unit 62 does not need to calculate an average field rate
per densely continuous position, either. For example, the
average field rate calculating unit 62 may divide the
region to be monitored 11 (except the range in which the
30 obstacle exists) per fixed range, determine a
representative position from each divided area, and
calculate the average field rate at this representative
position. Further, the average field rate calculating unit
62 may determine this average field rate as an average
field rate of the divided areas to which the representative
positions belong. Furthermore, the average field rate
calculating unit 62 only needs to calculate the average
field rate of the positions, the field rates of which have
5 been calculated by the field rate calculating unit 61.
That is, positions to calculate the average field rate are
the same as the positions, the field rates of which are
calculated by the field rate calculating unit 61.
[00761
10 Meanwhile, the average field rate is an average value
of field rates of predetermined top rank orders out of
field rates calculated per camera by the field rate
calculating unit 61 for focused positions in the region to
be monitored 11 (except the range in which the obstacle
15 exists). For example, for a position P in the region to be
monitored 11 (except the range in which the obstacle
exists), field rates are calculated per individual camera.
Further, top n rank orders from the first place to the n-th
place are determined as rank orders of calculation targets
20 of the average field rate. In this case, an average value
of n field rates from the highest field rate to the n-th
highest field rate among the field rates at this position P
is the average field rate. Therefore, the average field
rate calculating unit 62 only needs to calculate, as the
25 average field rate at the position P, the average value of
the n field rates from the highest field rate to the n-th
highest field rate among the field rates at this position P.
Note that a value of the above "n" is determined in advance.
100771
3 0 Fig. 16 depicts an explanatory view illustrating a
calculation example of an average field rate. In the
following description, similar to a case illustrated in Fig.
2, three monitoring domains ho to h2 are determined.
Further, the above n is "2" . That is, a case will be
described as an example where the average field rate
calculating unit 62 calculates, as an average field rate,
an average value of the top two field rates among the field
rates calculated per camera for one position. Fig. 16
5 illustrates, from the left side, a region per field rate
determined by the field rate calculating unit 61 for the
camera 21, a region per field rate determined by the field
rate calculating unit 61 for the camera 22, and a region
per field rate determined by the field rate calculating
10 unit 61 for the camera 23. Further, in Fig. 16, a region
of a field rate "1/3" is assigned a reference numeral "81".
Furthermore, a region of a field rate "2/3" is assigned a
reference numeral "82". Still further, a region of a field
rate "3/3 = 1" is assigned a reference numeral "83".
15 [0078]
Focusing upon the position P illustrated in Fig. 16,
the field rate calculated by the field rate calculating
unit 61 for the camera 21 is "1" . Further, the field rate
calculated by the field rate calculating unit 61 for the
20 camera 22 is "2/3". Furthermore, the field rate calculated
by the field rate calculating unit 61 for the camera 23 is
"0". Hence, the average field rate calculating unit 62
only needs to calculate, as the average field rate at the
position P, an average value of the top two field rates "1"
25 and "2/3" out of the three field rates "l", "2/3" and "0"
calculated per camera for the position P. In this example,
the average field rate of the position P is "5/6Ir.
[0079]
The average field rate calculating unit 62 calculates
30 an average field rate likewise for each of the other
positions in the region to be monitored 11 (except a range
in which an obstacle exists).
[0080]
Further, the average field rate calculating unit 62
specifies a region corresponding to each average field rate
in the region to be monitored 11. The region of each
average field rate specified in this way is an integration
result of fields according to the third exemplary
5 embodiment.
[0081]
The cover rate calculating unit 63b calculates a
cover rate. Meanwhile, the cover rate according to the
third exemplary embodiment is a ratio of a sum of
10 calculated average field rates to the number of positions,
field rates of which have been calculated in the region to
be monitored 11. That is, the cover rate calculating unit
63b calculates a cover rate by calculating following
equation (2).
15 [0082]
[Math. 21
Sum of calculated average field rates
Cover rate=
Number of positions at which field rates have
been calculated in region to be monitored
Equation (2)
[0083]
In addition, an average field rate calculation
20 position is the same as the position the field rate of
which is calculated by the field rate calculating unit 61,
and the denominator on the right side of equation (2) may
be "the number of positions an average field rate of which
has been calculated in the region to be monitored". Even
25 in this case, a calculation result of the cover rate is the
same.
[0084]
Although the cover rate calculated according to
equation (2) in the third exemplary embodiment can be
30 referred to as "a cover rate based on average field rates",
this cover rate is simply referred to as a "cover rate" for
ease of description.
[0085]
In the second exemplary embodiment, a cover rate (a
cover rate based on the field rate) is calculated per
5 camera. Meanwhile, the number of values of a calculated
cover rate (a cover rate based on an average field rate)
according to the third exemplary embodiment is one
irrespective of the number of cameras. The cover rate
according to the third exemplary embodiment can be a ratio
10 of a region in which a target to be monitored can be
monitored, to the region to be monitored 11 in a case where
a plurality of cameras is taken into account.
[OD861
Further, the cover rate calculating unit 63b may add
15 average field rates in a specified numerical value range in
a numerator on the right side of equation (2) when
calculating the cover rate by calculating equation (2).
That is, the cover rate calculating unit 63b may add only
average field rates in the specified numerical value range
20 upon calculation of the numerator on the right side of
equation (2), ignore average field rates outside this
numerical value range (for example, regard the average
field rates as 0) and calculate the cover rate according to
equation (2). Similar to the second exemplary embodiment,
25 a method of specifying this numerical value range is not
limited in particular.
[0087]
The display control unit 7 causes the display
apparatus to display an integration result of fields and a
30 cover rate.
[0088]
The integrating unit 6b (more specifically, the field
rate calculating unit 61, the average field rate
calculating unit 62, and the cover rate calculating unit
63b) is realized by, for example, the CPU which operates
according to the field display program.
[00891
Fig. 17 depicts a flowchart illustrating an example
5 of steps of processing according to the third exemplary
embodiment. Steps S1, S2 and 55 are the same as steps S1,
52 and S5 (see Fig. 11) in the second exemplary embodiment,
and will not be described.
[00901
10 After S5, the average field rate calculating unit 62
calculates an average field rate per position outside a
range in which an obstacle exists, in the region to be
monitored 11. Further, the average field rate calculating
unit 62 specifies a region corresponding to each calculated
15 average field rate in the region to be monitored 11 (step
S11). A result in step S11 is an integration result of
fields according to the third exemplary embodiment.
[00911
Next, the cover rate calculating unit 63b calculates
20 a cover rate by calculating equation (2) (step 512).
[00921
Next, the display control unit 7 causes the display
apparatus (not illustrated) to display the integration
result of the fields (step S4). In the third exemplary
25 embodiment, the display control unit 7 causes the display
apparatus to display each region, specified in step S11 as
a region corresponding to each average field rate,
according to a mode which supports this average field rate.
Displaying each region according to a mode which supports
30 an average field rate includes, for example, distinguishing
and displaying each region with a color, a pattern and
brightness associated with the average field rate. The
display control unit 7 causes the display apparatus to
display each region corresponding to each average field
.~ .
~ ~ i
i.
.i ., ' - ,
rate in the region to be monitored according to a mode
which supports this average field rate. Hence, a display
format of an integration result according to the third
exemplary embodiment is the same as the display format (Fig.
5 12) of an integration result according to the second
exemplary embodiment. Meanwhile, in the third exemplary
embodiment, each region is determined based on the average
field rate, and therefore an individual region is narrower
than an individual region displayed in the second exemplary
10 embodiment. Further, although an integration result is
displayed per camera in the second exemplary embodiment,
one integration result is displayed irrespective of the
number of cameras in the third exemplary embodiment. In
addition, the display control unit 7 causes the display
15 apparatus to also display the range in which the
superimposed obstacle exists.
[00931
Further, the display control unit 7 causes the
display apparatus to also display the cover rate calculated
20 in step S12. In the third exemplary embodiment, one value
of the cover rate is calculated irrespective of the number
of cameras. The display control unit 7 only needs to cause
the display apparatus to display this cover rate and an
integration result of fields.
25 [0094]
In the third exemplary embodiment, the display
apparatus displays a region corresponding to each average
field rate with a color, a pattern and brightness
associated with the average field rate. Further, this
30 means that, as the average field rate is higher, an image
of a larger portion of a target to be monitored (for
example, a person) can be captured. Consequently, it is
possible to intelligibly present to a user a range in which
a camera can capture an image of the entire target to be
monitored or a certain part or more of the target to be
monitored. In the third exemplary embodiment in particular,
an average value (average field rate) of a predetermined
number of top field rates among field rates calculated per
5 camera is calculated, and each region is displayed based on
this average field rate. Consequently, it is possible to
intelligibly present to the user a range in which the
camera can capture an image of the entire target to be
monitored or a certain part or more of the target to be
10 monitored by taking into account a plurality of cameras.
As in the second exemplary embodiment, the user can easily
learn the range in the region to be monitored in which the
camera can capture an image of the entire target to be
monitored or a large portion thereof. Further, by changing
15 information related to the camera and checking a change of
this range, it is easier to adjust, for example, a position,
a posture and an angle of view of the camera to maximize
this range.
[0095]
2 0 Furthermore, according to the third exemplary
embodiment, by also displaying a cover rate calculated
according to equation (2), it is possible to present to the
user a ratio of a region in which the camera can monitor
the target to be monitored, to the region to be monitored
25 11 in a case where a plurality of cameras is taken into
account.
[0096]
Next, a modified example of the third exemplary
embodiment will be described. In the third exemplary
30 embodiment, display of a cover rate may be skipped. In
this case, the field display system 1 according to the
third exemplary embodiment may not include the cover rate
calculating unit 63b, and may not execute step S12 (see Fig.
17).
[0097]
Further, in the third exemplary embodiment, in step
S4, the display control unit 7 may cause the display
apparatus to highlight a region corresponding to an average
5 field rate falling within a specified numerical value range.
A method of specifying this numerical value range is not
limited in particular. For example, the user may input, to
the field display system 1, a numerical value range of an
average field rate corresponding to a region to be
10 highlighted and the display control unit 7 may cause the
display apparatus to highlight the region corresponding to
the average field rate falling within the numerical value
range specified by the user. An operation of this display
control unit 7 is the same as an operation (an operation of
15 causing the display apparatus to highlight the region
corresponding to the field rate falling within the
specified numerical value range) described as one modified
example according to the second exemplary embodiment.
According to the present modified example, it is possible
20 to intelligibly present to the user a region corresponding
to an average field rate falling within the specified
numerical value range.
[00981
Further, in the third exemplary embodiment, in step
25 S4, the display control unit ' I may receive user's
specifying of a camera, and cause the display apparatus to
highlight a range which settles in an image of this camera
in an integration result of the fields. According to the
present modified example, it is possible to intelligibly
30 present to the user a range which settles in the image of
the specified camera.
[0099]
Fourth Exemplary Embodiment
Fig. 18 depicts a block diagram illustrating an
exemplary configuration of a field display system according
to a fourth exemplary embodiment of the present invention.
A field display system 40 according to the fourth exemplary
embodiment includes an information registering unit 2, an
5 information memory unit 3, a monitoring domain determining
unit 4, a projecting unit 5, a segmenting unit 41, and a
display control unit 42. The information registering unit
2, the information memory unit 3, the monitoring domain
determining unit 4, and the projecting unit 5 are the same
10 as those in the first to third exemplary embodiments, and
will not be described.
[OlOO]
The segmenting unit 41 segments each monitoring
domain based on how many fields of cameras each monitoring
15 domain corresponds to. It is assumed that three monitoring
domains ho to hz illustrated in Fig. 2 are determined, and
camera parameters of three cameras 21 to 23 (see Fig. 4)
are stored in the information memory unit 3. In this case,
the segmenting unit 41 segments the monitoring domain ho
20 into a region corresponding to the fields of the three
cameras, a region corresponding to the fields of the two
cameras, a region corresponding to the field of one camera,
and a region which does not correspond to a field of any
camera. The segmenting unit 41 segments the monitoring
25 domains hl and h2 in the same manner.
[OlOl]
The display control unit 42 causes a display
apparatus (not illustrated) to display each monitoring
domain to display a region segmented in an individual
30 monitoring domain according to a mode which supports the
number of cameras which include the region in the fields.
For example, the display control unit 42 distinguishes
among the region corresponding to the fields of the three
cameras, the region corresponding to the fields of the two
cameras, the region corresponding to the field of one
camera, and a region which does not correspond to a field
of any camera based on colors, patterns and brightness, and
causes the display apparatus to display each monitoring
5 domain.
[0102]
Note that the field display system 40 may include the
display apparatus.
[0103]
10 The information registering unit 2, the monitoring
domain determining unit 4, the projecting unit 5, the
segmenting unit 41 and the display control unit 42 are
realized by, for example, a CPU of a computer which
operates according to a field display program. In this
15 case, the CPU only needs to read the field display program,
and operate as the information registering unit 2, the
monitoring domain determining unit 4, the projecting unit 5,
the segmenting unit 41 and the display control unit 42.
Further, the field display program may be recorded in a
20 computer-readable recording medium. Furthermore, the
information registering unit 2, the monitoring domain
determining unit 4, the projecting unit 5, the segmenting
unit 41 and the display control unit 42 may be respectively
realized by different hardware.
25 [0104]
Next, an operation will be described.
Fig. 19 depicts a flowchart illustrating an example
of steps of processing according to the fourth exemplary
embodiment of the present invention. Steps S1 and S2 are
30 the same as steps S1 and S2 in the first to third exemplary
embodiments (see Figs. 7, 11 and 17), and therefore will
not be described. Further, a case will be described as an
example where three monitoring domains ho to hz illustrated
in Fig. 2 are determined, and camera parameters of three
cameras 21 to 23 (see Fig. 4) are stored in the information
memory unit 3.
[0105]
According to processing up to step 52, a result
5 obtained by projecting an image region of each of the
cameras 21 to 23 on each monitoring domain is obtained as
illustrated in Fig. 5. That is, a projection result of the
image region of the camera 21, a projection result of the
image region of the camera 22 and a projection result of
10 the image region of the camera 23 related to the monitoring
domain h2 are obtained. Similarly, a projection result of
the image region of each camera related to the monitoring
domain hl, and a projection result of the image region of
each camera related to the monitoring domain ho are
15 obtained.
[01061
After step S2, the segmenting unit 41 segments each
monitoring domain based on how many fields of cameras each
monitoring domain corresponds to (step 521).
20 [0107]
For example, based on the projection result of the
image region of the camera 21, the projection result of the
image region of the camera 22, and the projection result of
the image region of the camera 23 related to the monitoring
25 domain h2 (see an upper part in Fig. 5), the segmenting
unit 41 segments the monitoring domain hz into a region
corresponding to fields of the three cameras, a region
corresponding to fields of the two cameras, a region
corresponding to a field of one camera, and a region which
30 does not correspond to any camera. Fig. 20 illustrates a
result obtained by segmenting the monitoring domain h*
based on the projection result related to the monitoring
domain h2 illustrated in the upper part in Fig. 5.
[0108]
Similarly, based on the projection result of the
image region of the camera 21, the projection result of the
image region of the camera 22, and the projection result of
the image region of the camera 23 related to the monitoring
5 domain hl (see a middle part in Fig. 5), the segmenting
unit 41 segments the monitoring domain hl into a region
corresponding to fields of the three cameras, a region
corresponding to fields of the two cameras, a region
corresponding to a field of one camera, and a region which
10 does not correspond to any camera. Fig. 21 illustrates a
result obtained by segmenting the monitoring domain hl
based on the projection result related to the monitoring
domain hl illustrated in the middle part in Fig. 5.
[0109]
15 Similarly, based on the projection result of the
image region of the camera 21, the projection result of the
image region of the camera 22, and the projection result of
the image region of the camera 23 related to the monitoring
domain ho (see a lower part in Fig. 5), the segmenting unit
20 41 segments the monitoring domain ho into a region
corresponding to fields of the three cameras, a region
corresponding to fields of the two cameras, a region
corresponding to a field of one camera, and a region which
does not correspond to any camera. Fig. 22 illustrates a
25 result obtained by segmenting the monitoring domain ho
based on the projection result related to the monitoring
domain ho illustrated in the lower part in Fig. 5.
[OllO]
As illustrated in Figs. 20 to 22, as a result of step
30 S21, a result obtained by segmenting monitoring domains is
obtained per monitoring domain. In Figs. 20 to 22, a
region corresponding to the field of one camera is
indicated by a reference numeral "91" , Further, the region
corresponding to the fields of the two cameras is indicated
by a reference numeral "92". Furthermore, the region
corresponding to the fields of the three cameras is
indicated by a reference numeral "93". A region which does
not correspond to any camera is indicated in white.
5 Further, the segmenting unit 41 may exclude the range in
which the obstacle 12 exists from a segmentation target in
each of the monitoring domains ho to h2.
[Olll]
After step S21, the display control unit 42 causes
10 the display apparatus (not illustrated) to display each of
the segmented monitoring domains ho to hz (step S22). In
step S22, the display control unit 42 displays a region
segmented in an individual monitoring domain according to a
mode which supports the number of cameras which include the
15 region in the fields.
[01121
Fig. 23 depicts an explanatory view illustrating an
example of a display format in step S22. The display
control unit 42 may cause the display apparatus to arrange
20 and display each of the segmented monitoring domains ho to
h~ as top views illustrated in Fig. 23. In a display
example illustrated in Fig. 23, different patterns are used
for the region 91 corresponding to a field of one camera,
the region 92 corresponding to fields of two cameras, the
25 region 93 corresponding to fields of three cameras, and
other regions. The display control unit 7 causes the
display apparatus to also display the range in which the
obstacle 12 exists.
[01131
30 Further, as a display format of each monitoring
domain in step 522, the following display format may be
adopted. That is, the display control unit 42 may cause
the display apparatus to display perspective views in which
the monitoring domains ho to h2 segmented as illustrated in
Figs. 20, 21 and 23 are arranged at positions corresponding
to the monitoring domains ho to h2 in a three-dimensional
space. In this example, the display control unit 42 causes
the display apparatus to display a perspective view in
5 which there is the monitoring domain hl as an upper layer
of the monitoring domain ho and the monitoring domain h2 is
on this upper layer. Even in this display format, a region
in each of the monitoring domains ho to hl is displayed
with a different pattern depending on how many fields of
10 cameras the region corresponds to.
[0114]
Further, the display control unit 42 may cause the
display apparatus to display a perspective view in which
each monitoring domain is arranged in a three-dimensional
15 space as described above, and a larger three-dimensional
object is arranged in the segmented region of the
monitoring domain as the number of cameras which include
this region in the fields is higher. Although the shape of
this three-dimensional object is not limited in particular,
20 a case will be described as an example where the threedimensional
object is a ball. Further, ball sizes include
three sizes of large, medium and small.
[0115]
In this example, the display control unit 42
25 determines a state in which there is the monitoring domain
hl as the upper layer of the monitoring domain ho and the
monitoring domain h:! is on this upper layer. Further, the
display control unit 42 determines a state in which a large
ball crossing the region 93 is arranged in the region 93
30 (see Figs. 21 and 22) corresponding to the fields of the
three cameras in each of the monitoring domains ho to h2.
Similarly, the display control unit 42 determines a state
in which a medium size ball crossing the region 92 is
arranged in the region 92 (see Figs. 21 and 22)
corresponding to the fields of the two cameras in each of
the monitoring domains ho to h2, and determines a state in
which a small ball crossing the region 91 is arranged in
the region 91 (see Figs. 21 and 22) corresponding to the
5 field of the one camera. The display control unit 42 may
cause the display apparatus to display the perspective view
of this state.
[0116]
Further, when causing the display apparatus to
10 display the perspective view in which each of the
monitoring domains ho to h2 is arranged in a threedimensional
space, the display control unit 42 may update
the perspective view by changing a view point according to
a user operation.
15 [0117]
The user can check, according to each displayed
monitoring domain, which region is in the fields of the
cameras 21 to 23 in the three monitoring domains ho to h2
corresponding to three types of heights in the three-
20 dimensional space. Consequently, even in the fourth
exemplary embodiment, it is possible to obtain the same
effect as that in each of the above exemplary embodiments.
[0118]
According to the fourth exemplary embodiment in
25 particular, a region in a monitoring domain is segmented
according to how many fields of cameras the region
corresponds to and displayed, so that it is possible to
intelligibly present to the user that an image of a target
to be monitored (for example, a person) is captured by more
30 cameras. Consequently, the user can easily learn a range
in which fields of more cameras overlap.
[0119]
Further, as described above, when the user is
presented with a perspective view in which a larger threedimensional
object (for example, a ball) is arranged in a
region segmented in a monitoring domain as the number of
cameras which include this region in the field is higher,
the user can easily learn hobi many cameras capture images
5 of a target to be monitored based on the size of this
three-dimensional object.
[0120]
Next, a modified example of the fourth exemplary
embodiment will be described. In the fourth exemplary
10 embodiment, in step S22, the display control unit 42 may
cause the display apparatus to highlight a region included
in fields of the specified number of cameras. A method of
specifying the number of cameras is not limited in
particular. For example, the user may input the number of
15 cameras in the field display system 40 and the display
control unit 42 may cause the display apparatus to
highlight a region included in fields of the user-specified
number of cameras. The number of cameras to be specified
is not limited to one value such as "one", and may be
20 specified as a range of "one or more and the total number
(three in this example) or less". Hereinafter, a case will
be described as an example where top views of monitoring
domains are presented as illustrated in Fig. 23. Note that
the monitoring domain ho illustrated in a lower part in Fig.
25 23 will be described as an example.
[0121]
Fig. 24 depicts an explanatory view illustrating an
example of highlighting a region included in fields of the
specified number of cameras. Fig. 24 illustrates an
30 example of highlighting in the monitoring domain ho.
[0122]
The display control unit 42 causes the display
apparatus to display the monitoring domains ho to hz as
illustrated in Fig. 23. Further, the user specifies a
range of "one or more and three or less" as the number of
cameras. This means that a command to highlight a region
included in fields of one, two or three cameras is received
from the outside. In response to user's specifying of the
5 number of cameras, the display control unit 42 highlights a
region obtained by combining the region 91 corresponding to
a field of one camera, the region 92 corresponding to
fields of two cameras and the region 93 corresponding to
fields of three cameras in the monitoring domain ho as
10 illustrated in Fig. 24. The region 95 highlighted in an
example of Fig. 24 is a region obtained by combining the
regions 91 to 93 in the monitoring domain ho. Although the
monitoring domain ho has been described as an example, the
display control unit 42 performs highlighting likewise in
15 the monitoring domains hl and h:! illustrated in Fig. 23. In
the present modified example, it is possible to
intelligibly present to the user a range included in fields
of the specified number of cameras.
[0123]
2 0 Further, only "0" may be specified as the number of
cameras. Fig. 25 depicts an explanatory view illustrating
an example of a region to be highlighted in this case. Fig.
25 illustrates an example of highlighting in the monitoring
domain ho similar to Fig. 24. The region 96 highlighted in
25 an example illustrated in Fig. 25 is a range not included
in a field of any camera. In other words, the region 96 is
a range which is a blind angle for: all cameras. The
display control unit 42 performs highlighting likewise in
the monitoring domains hl and h;! illustrated in Fig. 23. As
30 illustrated in Fig. 25, by specifying "0" as the number of
cameras, the user can easily check a range which is a blind
angle for all cameras.
[0124]
Further, when performing highlighting, the display
control unit 42 preferably causes the display apparatus to
also display a range in which the obstacle 12 exists.
[0125]
Furthermore, when causing the display apparatus to
5 display a perspective view in which each monitoring domain
is arranged in a three-dimensional space, the display
control unit 42 may highlight a region included in fields
of the specified number of cameras in each monitoring
domain.
10 [0126]
Still further, when highlighting the region included
in fields of the specified number of cameras, the field
display system 40 may calculate a cover rate which is a
ratio of the area of a region to be highlighted (referred
15 to as a "highlighted region" below), to the area of the
monitoring domain. This definition of the cover rate is
different from the definition of the cover rate in the
second exemplary embodiment and the definition of the cover
rate in the third exemplary embodiment. Although the cover
20 rate used in the modified example of the fourth exemplary
embodiment can be referred to as "a highlighted display
region cover rate", this cover rate is simply referred to
as a "cover rate" for ease of description.
[0127]
2 5 Fig. 26 depicts a block diagram illustrating an
exemplary configuration in a case where a cover rate is
calculated in the fourth exemplary embodiment. The same
components as those illustrated in Fig. 18 will be assigned
the same reference numerals as those in Fig. 18 and will
30 not be described.
[0128]
The cover rate calculating unit 43 calculates a cover
rate when the display control unit 42 highlights a region
included in fields of the specified number of cameras.
Further, the display control unit 42 causes the display
apparatus to display the calculated cover rate and a
monitoring domain to be highlighted.
[01291
5 The cover rate calculating unit 43 may calculate a
cover rate per monitoring domain or calculate a cover rate
of all of a plurality of monitoring domains.
[0130]
Calculation in a case where the cover rate
10 calculating unit 43 calculates a cover rate per monitoring
domain will be described. When calculating the cover rate
per monitoring domain, the cover rate calculating unit 43
calculates a cover rate by calculating following equation
(3) per monitoring domain.
15 [01311
[Math. 31
Area of highlighted region
Cover rate=
Area of monitoring domain
Equation (3)
[0132]
For example, when calculating the cover rate in the
20 monitoring domain ho illustrated in Fig. 24, the cover rate
calculating unit 43 calculates, as a cover rate, a ratio of
the area of a highlighted region 95 (see Fig. 24) to the
area of the monitoring domain ho. The cover rate
calculating unit 43 calculates the cover rate of the
25 monitoring domain hl and the cover rate of the monitoring
domain hz likewise.
[01331
In this case, the display control unit 42 causes the
display apparatus to display a cover rate calculated per
30 monitoring domain. For example, when causing the display
apparatus to highlight the region in each of the monitoring
domains ho to h ~ ,th e display control unit 42 only needs to
cause the display apparatus to display a cover rate
corresponding to the vicinity of each of the monitoring
domains ho to h2.
5 [0134]
Next, calculation in a case where the cover rate
calculating unit 43 calculates a cover rate of the entirety
of a plurality of monitoring domains will be described.
Meanwhile, n+l monitoring domains ho to h, are determined.
10 The cover rate calculating unit 43 calculates a cover rate
by calculating folloriing equation (4).
LO1351
[Math. 41
i=oA rea of highlighted region of monitoring domain hi
Cover rate=
i=o Area of monitoring domain hi
Equation (4)
15 [0136]
That is, the cover rate calculating unit 43
calculates, as a cover rate, a ratio of a total sum of the
areas of highlighted regions in each of monitoring domains
ho to h, to a total sum of the areas of the monitoring
20 domains ho to h,. When, for example, three monitoring
domains ho to h2 are determined, the cover rate calculating
unit 43 calculates a total sum of the area of the
highlighted region in the monitoring domain ho, the area of
a highlighted region in the monitoring domain hl, and the
25 area of the highlighted region in the monitoring domain h2.
The cover rate calculating unit 43 then calculates, as a
cover rate, a ratio of the total sum of the areas of these
highlighted regions to the total sum of the areas of the
monitoring domains ho to h2.
30 [0137]
When the cover rate calculating unit 43 calculates
the cover rate according to equation ( 4 ) , the number of
cover rates to be calculated is one irrespective of the
number of monitoring domains. The display control unit 42
causes the display apparatus to display the cover rate.
5 [0138]
Further, in the fourth exemplary embodiment, in step
S22, the display control unit 42 may receive user's
specifying of a camera, and cause the display apparatus to
highlight a range which settles in an image of this camera.
10 For example, the display control unit 42 causes the display
apparatus to display the monitoring domains ho to h2 as
illustrated in Fig. 23. Further, when, for example, the
camera 21 is specified, the display control unit 42 causes
the display apparatus to highlight a range which settles in
15 an image of the camera 21 as illustrated in Fig. 27. In
this case, it is possible to intelligibly present to the
user a range which settles in the image of the specified
camera. Note that, although Fig. 27 highlights the range
which settles in the image of the camera 21, highlighting
20 may be performed by other methods. Meancrhile, although
highlighting a range which settles in an image of a
specified camera has been described as the modified example
of the fourth exemplary embodiment, a range which settles
in an image of a specified camera may be highlighted also
25 in each of the above exemplary embodiments.
[0139]
Note that, although cases have been described in each
of the above exemplary embodiments as examples where the
number of monitoring domains is three and the number of
30 cameras is three, the number of monitoring domains and that
of cameras are not limited to the numbers described in the
above exemplary embodiments.
[0140]
Next, main components of the present invention will
be described. Fig. 28 depicts a block diagram illustrating
an example of main components according to the present
invention.
[0141]
5 A projecting unit 5 projects a position in an image
captured by a camera, on a plurality of monitoring domains
obtained by moving, in parallel, a region to be monitored
which defines a range to be checked for an image capturing
situation of the camera. The monitoring domain is
10 determined based on the height of a target to be monitored,
an image of which is captured by the camera. The
projecting unit 5 specifies fields of the plurality of
monitoring domains as a range an image of which the camera
can capture without being blocked by an obstacle.
15 [0142]
An integrating unit 6 integrates the fields in the
monitoring domains.
[0143]
The display control unit 7 causes the display
20 apparatus to display an integration result of fields.
[0144]
According to this configuration, it is possible to
intelligibly present to a user a range in which a camera
can capture an image of the entire target to be monitored
25 or a certain part or more of the target to be monitored.
[01451
Fig. 29 depicts a block diagram illustrating another
example of main components according to the present
invention. The projecting unit 5 is the same as the
30 projecting unit 5 illustrated in Fig. 28, and will not be
described.
[0146]
The segmenting unit 41 segments each monitoring
domain based on how many fields of cameras each monitoring
domain corresponds to.
[0147]
The display control unit 42 causes a display
apparatus to display each monitoring domain such that a
5 region segmented in an individual monitoring domain is
displayed according to a mode which supports the number of
cameras which include the region in the fields.
[01481
According to the configuration illustrated in Fig. 29,
10 it is possible to intelligibly present to a user a range in
which a camera can capture an image of the entire target to
be monitored or a certain part or more of the target to be
monitored.
[01491
15 Fifth Exemplary Embodiment
Fig. 30 illustrates a configuration of a field
display system according to a fifth exemplary embodiment of
the present invention. The field display system according
to the fifth exemplary embodiment includes a projecting
20 unit 51 and an output control unit 53.
[0150]
The projecting unit 51 projects a position in an
image captured by a camera, on a plurality of planes
determined based on the height of a target to be monitored,
25 an image of which is captured by the camera, and specifies
fields of the plurality of planes as a range an image of
which can be captured by the camera.
[0151]
The output control unit 53 stereoscopically outputs
30 the planes the fields of which have been specified. The
output control unit 53 can be referred to as a "stereoimage
converting unit". The output control unit 53
stereoscopically outputs, on a space, overlaid planes
fields of which have been specified, by means of a hologram,
for example. Further, the output control unit 53 may cause
a 3D printer to output, as an object, overlaid planes
fields of which have been specified.
[0152]
5 When the output control unit 53 outputs the planes
the fields of which have been specified, the projecting
unit 51 may project a position in an image captured by the
camera, on a plurality of planes minutely set to a
monitoring space, and specify fields of the plurality of
10 planes as a range an image of which can be captured by the
camera.
LO1531
According to the fifth exemplary embodiment, the
output control unit 53 causes, for example, a 3D printer to
15 print each minutely set plane, and overlays the planes like
bricks to be output, so that the user can stereoscopically
check the inside. By this means, for example, many people
can efficiently study a camera arrangement.
101541
20 Further, the field display system according to the
present invention may be configured as illustrated in Fig.
31. The field display system illustrated in Fig. 31
includes a projecting unit 55, a segmenting unit 56, and an
output control unit 57.
25 [0155]
The projecting unit 55 is the same as the projecting
unit 51 illustrated in Fig. 30. More specifically, the
projecting unit 55 projects a position in an image captured
by a camera, on a plurality of planes determined based on
30 the height of a target to be monitored, an image of which
is captured by the camera, and specifies fields of the
plurality of planes as a range an image of which can be
captured by the camera. For example, the projecting unit
55 specifies the fields as a range an image of which the
camera can capture without being blocked by an obstacle.
Further, this plane is obtained by moving, in parallel, a
region to be monitored which defines a check target range
of an image capturing situation of the camera.
5 [0156]
The segmenting unit 56 segments each plane based on
how many fields of cameras each plane corresponds to.
[0157]
The output control unit 57 outputs each plane to
10 display a region segmented in an individual plane according
to a mode which supports the number of cameras which
include the region in fields.
[0158]
For example, the output control unit 57 may planarly
15 overlay stereoimages matching the number of cameras which
include the segmented region in the fields to
stereoscopically display, on a space, by means of a
hologram. Further, for example, the output control unit 57
may cause a 3D printer to output, as an object, a shape
20 obtained by planarly overlaying stereoimages matching the
number of cameras which include the segmented region in the
fields.
[0159]
Furthermore, the field display system according to
25 the present invention may be configured as illustrated in
Fig. 32. The field display system illustrated in Fig. 32
includes a projecting unit 65, an integrating unit 66, and
a display control unit 67. The projecting unit 65 is the
same as the projecting unit 51 illustrated in Fig. 30 and
30 the projecting unit 55 illustrated in Fig. 31.
[0160]
The integrating unit 66 integrates the fields in the
planes. This integration processing may be the same as the
integration processing described above.
[0161]
The display control unit 67 causes the display
apparatus to display an integration result of fields.
[0162]
5 Note that, although projection processing or the like
is performed on a monitoring domain obtained by moving a
region to be monitored in parallel, a target subjected to
processing of the present invention is not limited to a
monitoring domain. More specifically, the projecting unit
10 51 may project a position in an image captured by the
camera, on a plurality of virtual planes on a space, the
images of which can be captured by the camera. In this
case, the plurality of virtual planes may not necessarily
be parallel to a region to be monitored. Fig. 33
15 illustrates an example in which a central virtual plane of
three virtual planes is not parallel to the region to be
monitored. Projection on virtual planes as illustrated in
Fig. 33 is also included in the present invention.
[0163]
2 0 Although a part or entirety of the above exemplary
embodiments can be described as in the following
Supplementary notes, the exemplary embodiments are by no
means limited to the Supplementary notes below.
[0164 ]
25 (Supplementary note 1) A field display system including:
projecting means configured to project a position in an
image captured by a camera, on a plurality of monitoring
domains obtained by moving, in parallel, a region to be
monitored which defines a range to be checked for an image
30 capturing situation of the camera, the monitoring domain
being determined based on a height of a target to be
monitored, an image of which is captured by the camera, and
to specify fields of the plurality of monitoring domains as
a range an image of which the camera captures without being
blocked by an obstacle; integrating means configured to
integrate the fields in the monitoring domains; and display
control means configured to cause a display apparatus to
display an integration result of the fields.
5 [0165]
(Supplementary note 2) The field display system according
to Supplementary note 1, wherein the integrating means
extracts a region corresponding to a field of each
monitoring domain as the integration result of the fields
10 per camera, and the display control means causes the
display apparatus to display the extracted region per
camera.
[0166]
(Supplementary note 3) The field display system according
15 to Supplementary note 1, wherein the integrating means
includes field rate calculating means configured to perform,
per camera, processing of calculating a field rate which is
a ratio of the number of monitoring domains, positions of
which belong to the fields, to a total number of monitoring
20 domains, per position outside a range in the region to be
monitored in which the obstacle exists, and the display
control means causes the display apparatus to display, per
camera, a region corresponding to each field rate in the
region to be monitored according to a mode which supports
25 the field rate.
101671
(Supplementary note 4) The field display system according
to Supplementary note 3, wherein the integrating means
includes cover rate calculating means configured to
30 calculate, per camera, a cover rate which is a ratio of a
sum of calculated field rates, to the number of positions,
field rates of which have been calculated in the region to
be monitored, and the display control means causes the
display apparatus to display the cover rate of each camera.
[0168]
(Supplementary note 5) The field display system according
to Supplementary note 3 or 4, wherein the display control
means causes the display apparatus to highlight a region
5 corresponding to a field rate falling within a specified
numerical value range.
[0169]
(Supplementary note 6) The field display system according
to Supplementary note 1, wherein the integrating means
10 includes: field rate calculating means configured to
perform, per camera, processing of calculating a field rate
which is a ratio of the number of monitoring domains,
positions of which belong to the fields, to a total number
of monitoring domains, per position outside a range in the
15 region to be monitored in which the obstacle exists; and
average field rate calculating means configured to
calculate, per position outside the range in the region to
be monitored in which the obstacle exists, an average field
rate which is an average value of field rates of
20 predetermined top rank orders out of field rates calculated
per camera for the position, and the display control means
causes the display apparatus to display a region
corresponding to each average field rate in the region to
be monitored according to a mode which supports the average
25 field rate.
[0170]
(Supplementary note 7) The field display system according
to Supplementary note 6, wherein the integrating means
includes cover rate calculating means configured to
30 calculate a cover rate which is a ratio of a sum of
calculated average field rates to the number of positions,
field rates of which have been calculated in the region to
be monitored, and the display control means causes the
display apparatus to display the cover rate.
[01711
(Supplementary note 8) The field display system according
to Supplementary note 6 or 7, wherein the display control
means causes the display apparatus to highlight a region
5 corresponding to an average field rate falling within a
specified numerical value range.
[0172]
(Supplementary note 9) A field display system including:
projecting means configured to project a position in an
10 image captured by a camera, on a plurality of monitoring
domains obtained by moving, in parallel, a region to be
monitored which defines a range to be checked for an image
capturing situation of the camera, the monitoring domain
being determined based on a height of a target to be
15 monitored, an image of which is captured by the camera, and
to specify fields of the plurality of monitoring domains as
a range an image of which the camera.captures without being
blocked by an obstacle; segmenting means configured to
segment each monitoring domain based on how many fields of
20 cameras each monitoring domain corresponds to; and display
control means configured to cause the display apparatus to
display each monitoring domain to display a region
segmented in an individual monitoring domain according to a
mode which supports the number of cameras which include the
25 region in the fields.
[0173]
(Supplementary note 10) The field display system according
to Supplementary note 9, wherein the display control means
causes the display apparatus to arrange and display each
30 monitoring domain as a top view.
101741
(Supplementary note 11) The field display system according
to Supplementary note 9, wherein the display control means
causes the display apparatus to display a perspective view
in which each monitoring domain is arranged in a threedimensional
space.
LO1751
(Supplementary note 12) The field display system according
5 to Supplementary note 9 or 11, wherein the display control
means causes the display apparatus to display a perspective
view in which each monitoring domain is arranged in a
three-dimensional space, and a larger three-dimensional
object is arranged in the region segmented in the
10 monitoring domain as the number of cameras which include
the region in the fields is higher.
lo1761
(Supplementary note 13) The field display system according
to any one of Supplementary notes 9 to 12, wherein the
15 display control means causes the display apparatus to
highlight a region included in fields of a specified number
of cameras.
[01771
(Supplementary note 14) The field display system according
20 to Supplementary note 13, further including: cover rate
calculating means configured to calculate a cover rate
which is a ratio of an area of the highlighted region to an
area of a monitoring domain, wherein the display control
means causes the display apparatus to display the cover
25 rate.
[0178]
(Supplementary note 15) The field display system according
to Supplementary note 14, wherein the cover rate
calculating means calculates the cover rate per monitoring
30 domain, and the display control means causes the display
apparatus to display the cover rate of each monitoring
domain.
[0179]
(Supplementary note 16) The field display system according
to Supplementary note 14, wherein the cover rate
calculating means calculates, as the cover rate, a ratio of
a total sum of areas of regions highlighted in the
monitoring domains, to a total sum of areas of the
5 monitoring domains, and the display control means causes
the display apparatus to display the cover rate.
[0180]
(Supplementary note 17) A field display system including:
projecting means configured to project a position in an
10 image captured by a camera, on a plurality of planes
determined based on a height of a target to be monitored,
an image of which is captured by the camera, and to specify
fields of the plurality of planes as a range an image of
which is captured by the camera; integrating means
15 configured to integrate the fields in the planes; and
display control means configured to cause a display
apparatus to display an integration result of the fields.
[0181]
(Supplementary note 18) The field display system according
20 to Supplementary note 17, wherein the plane is obtained by
moving, in parallel, a region to be monitored which defines
a range to be checked for an image capturing situation of
the camera.
[0182]
25 (Supplementary note 19) The field display system according
to Supplementary note 17 or 18, wherein the projecting
means specifies fields as a range an image of which the
camera captures without being blocked by an obstacle.
[0183]
30 (Supplementary note 20) A field display system including:
projecting means configured to project a position in an
image captured by a camera, on a plurality of planes
determined based on a height of a target to be monitored,
an image of which is captured by the camera, and to specify
fields of the plurality of planes as a range an image of
which is captured by the camera; and output control means
configured to stereoscopically output the planes the fields
of which have been specified.
5 [0184]
(Supplementary note 21) The field display system according
to Supplementary note 20, wherein the output control means
stereoscopically displays, on a space, overlaid planes the
fields of which are specified.
10 [0185]
(Supplementary note 22) The field display system according
to Supplementary note 20, wherein the output control means
causes a 3D printer to output, as an object, overlaid
planes the fields of which are specified.
15 [01861
(Supplementary note 23) A field display system including:
projecting means configured to project a position in an
image captured by a camera, on a plurality of planes
determined based on a height of a target to be monitored,
20 an image of which is captured by the camera, and to specify
fields of the plurality of planes as a range an image of
which is captured by the camera; segmenting means
configured to segment each plane based on how many fields
of cameras each plane corresponds to; and output control
25 means configured to output each plane to display a region
segmented in an individual plane according to a mode which
supports the number of cameras which include the region in
the fields.
[0187]
30 (Supplementary note 24) The field display system according
to Supplementary note 23, wherein the plane is obtained by
moving, in parallel, a region to be monitored which defines
a range to be checked for an image capturing situation of
the camera.
[0188]
(Supplementary note 25) The field display system according
to Supplementary note 23 or 24, wherein the projecting
means specifies fields as a range an image of which the
5 camera captures without being blocked by an obstacle.
[01891
(Supplementary note 26) The field display system according
to any one of Supplementary notes 23 to 25, wherein the
output control means planarly overlays and stereoscopically
10 displays, on a space, stereoimages, the number of which
corresponds to the number of cameras which include the
segmented region in the fields.
[01901
(Supplementary note 27) The field display system according
15 to any one of Supplementary notes 23 to 25, wherein the
output control means causes a 3D printer to output, as an
object, a shape obtained by planarly overlaying
stereoimages, the number of which corresponds to the number
of cameras which include the segmented region in the fields.
20 [0191]
This application is based upon and claims the benefit
of priority from Japanese Patent Application No. 2012-
267552 filed on December 6, 2012, the entire contents of
which are incorporated herein by reference.
25 [0192]
Although the present invention has been described
above with reference to the exemplary embodiments, the
present invention is by no means limited to the above
exemplary embodiments. Configurations and details of the
30 present invention can be variously changed within a scope
of the present invention those skilled in the art can
understand.
Industrial Applicability
101931
The present invention is suitably applied to a field
display system which specifies a field of a camera that can
capture an image of a target to be monitored well and
5 displays this field.
Reference Signs List
[0194]
5 Projecting unit
10 6, 6a, 6b Integrating unit
7, 42 Display control unit
4 1 Segmenting unit
61 Field rate calculating unit
62 Average field rate calculating unit
15 43, 63a, 63b Cover rate calculating unit

CLAIMS
[Claim 1]
A field display system comprising:
projecting means configured to project a position in
5 an image captured by a camera, on a plurality of monitoring
domains obtained by moving, in parallel, a region to be
monitored which defines a range to be checked for an image
capturing situation of the camera, the monitoring domain
being determined based on a height of a target to be
10 monitored, an image of which is captured by the camera, and
to specify fields of the plurality of monitoring domains as
a range an image of which the camera captures without being
blocked by an obstacle;
integrating means configured to integrate the fields
15 in the monitoring domains; and
display control means configured to cause a display
apparatus to display an integration result of the fields.
[Claim 2]
The field display system according to claim 1,
20 wherein
the integrating means extracts a region corresponding
to a field of each monitoring domain as the integration
result of the fields per camera, and
the display control means causes the display
25 apparatus to display the extracted region per camera.
[Claim 3]
The field display system according to claim 1,
wherein
the integrating means comprises field rate
30 calculating means configured to perform, per camera,
processing of calculating a field rate which is a ratio of
the number of monitoring domains, positions of which belong
to the fields, to a total number of monitoring domains, per
position outside a range in the region to be monitored in
which the obstacle exists, and
the display control means causes the display
apparatus to display, per camera, a region corresponding to
each field rate in the region to be monitored according to
5 a mode which supports the field rate.
[Claim 4]
The field display system according to claim 3,
wherein
the integrating means comprises cover rate
10 calculating means configured to calculate, per camera, a
cover rate which is a ratio of a sum of calculated field
rates, to the number of positions, field rates of which
have been calculated in the region to be monitored, and
the display control means causes the display
15 apparatus to display the cover rate of each camera.
[Claim 5]
The field display system according to claim 3 or 4,
wherein the display control means causes the display
apparatus to highlight a region corresponding to a field
20 rate falling within a specified numerical value range.
[Claim 6]
The field display system according to claim 1,
wherein
the integrating means comprises:
25 field rate calculating means configured to perform,
per camera, processing of calculating a field rate which is
a ratio of the number of monitoring domains, positions of
which belong to the fields, to a total number of monitoring
domains, per position outside a range in the region to be
30 monitored in which the obstacle exists; and
average field rate calculating, means configured to
calculate, per position outside the range in the region to
be monitored in which the obstacle exists, an average field
rate which is an average value of field rates of
predetermined top rank orders out of field rates calculated
per camera for the position, and
the display control means causes the display
apparatus to display a region corresponding to each average
5 field rate in the region to be monitored according to a
mode which supports the average field rate.
[Claim 7]
The field display system according to claim 6,
wherein
10 the integrating means comprises cover rate
calculating means configured to calculate a cover rate
which is a ratio of a sum of calculated average field rates
to the number of positions, field rates of which have been
calculated in the region to be monitored, and
15 the display control means causes the display
apparatus to display the cover rate.
[Claim 8]
The field display system according to claim 6 or 7,
wherein the display control means causes the display
20 apparatus to highlight a region corresponding to an average
field rate falling within a specified numerical value range.
[Claim 9]
A field display system comprising:
projecting means configured to project a position in
25 an image captured by a camera, on a plurality of monitoring
domains obtained by moving, in parallel, a region to be
monitored which defines a range to be checked for an image
capturing situation of the camera, the monitoring domain
being determined based on a height of a target to be
30 monitored, an image of which is captured by the camera, and
to specify fields of the plurality of monitoring domains as
a range an image of which the camera captures without being
blocked by an obstacle;
segmenting means configured to segment each
monitoring domain based on how many fields of cameras each
monitoring domain corresponds to; and
display control means configured to cause the display
apparatus to display each monitoring domain to display a
5 region segmented in an individual monitoring domain
according to a mode which supports the number of cameras
which include the region in the fields.
[Claim 10]
The field display system according to claim 9,
10 wherein the display control means causes the display
apparatus to arrange and display each monitoring domain as
a top view.
[Claim 11]
The field display system according to claim 9,
15 wherein the display control means causes the display
apparatus to display a perspective view in which each
monitoring domain is arranged in a three-dimensional space.
[Claim 12]
The field display system according to claim 9 or 11,
20 wherein the display control means causes the display
apparatus to display a perspective view in which each
monitoring domain is arranged in a three-dimensional space,
and a larger three-dimensional object is arranged in the
region segmented in the monitoring domain as the number of
25 cameras which include the region in the fields is higher.
[Claim 13]
The field display system according to any one of
claims 9 to 12, wherein the display control means causes
the display apparatus to highlight a region included in
30 fields of a specified number of cameras.
[Claim 14]
The field display system according to claim 13,
further comprising:
cover rate calculating means configured to calculate
a cover rate which is a ratio of an area of the highlighted
region to an area of a monitoring domain,
wherein the display control means causes the display
apparatus to display the cover rate.
5 [Claim 15]
The field display system according to claim 14,
wherein
the cover rate calculating means calculates the cover
rate per monitoring domain, and
10 the display control means causes the display
apparatus to display the cover rate of each monitoring
domain.
[Claim 16]
The field display system according to claim 14,
15 wherein
the cover rate calculating means calculates, as the
cover rate, a ratio of a total sum of areas of regions
highlighted in the monitoring domains, to a total sum of
areas of the monitoring domains, and
2 0 the display control means causes the display
apparatus to display the cover rate.
[Claim 17]
A field display method comprising:
projecting a position in an image captured by a
25 camera, on a plurality of monitoring domains obtained by
moving, in parallel, a region to be monitored which defines
a range to be checked for an image capturing situation of
the camera, the monitoring domain being determined based on
a height of a target to be monitored, an image of which is
30 captured by the camera, and specifying fields of the
plurality of monitoring domains as a range an image of
which the camera captures without being blocked by an
obstacle;
integrating the fields in the monitoring domains; and
causing a display apparatus to display an integration
result of the fields.
[Claim 18]
A field display method comprising:
projecting a position in an image captured by a
camera, on a plurality of monitoring domains obtained by
moving, in parallel, a region to be monitored which defines
a range to be checked for an image capturing situation of
the camera, the monitoring domain being determined based on
10 a height of a target to be monitored, an image of rihich is
captured by the camera, and specifying fields of the
plurality of monitoring domains as a range an image of
which the camera captures without being blocked by an
obstacle;
15 segmenting each monitoring domain based on how many
fields of cameras each monitoring domain corresponds to;
and
causing the display apparatus to display each
monitoring domain to display a region segmented in an
20 individual monitoring domain according to a mode rihich
supports the number of cameras which include the region in
the fields.
[Claim 19]
A field display program for causing a computer to
execute:
projection processing of projecting a position in an
image captured by a camera, on a plurality of monitoring
domains obtained by moving, in parallel, a region to be
monitored which defines a range to be checked for an image
capturing situation of the camera, the monitoring domain
being determined based on a height of a target to be
monitored, an image of which is captured by the camera, and
specifying fields of the plurality of monitoring domains as
a range an image of which the camera captures without being
blocked by an obstacle;
integration processing of integrating the fields in
the monitoring domains; and
display control processing of causing a display
apparatus to display an integration result of the fields.
[Claim 20]
A field display program for causing a computer to
execute :
projection processing of projecting a position in an
image captured by a camera, on a plurality of monitoring
domains obtained by moving, in parallel, a region to be
monitored which defines a range to be checked for an image
capturing situation of the camera, the monitoring domain
being determined based on a height of a target to be
monitored, an image of which is captured by the camera, and
specifying fields of the plurality of monitoring domains as
a range an image of which the camera captures without being
blocked by an obstacle;
segmentation processing of segmenting each monitoring
domain based on how many fields of cameras each monitoring
domain corresponds to; and
display control processing of causing a display
apparatus to display each monitoring domain to display a
region segmented in an individual monitoring domain
according to a mode which supports the number of cameras
which include the region in the fields.