[0001]
　The present invention is, securities such as gift certificates, credit cards, and brand products and equipment parts available identification device against authentication judgment in the forgery of the identification method, a computer readable medium including an identification program, and identification program.
　The present application, to March 19, 2015, claiming priority based on Japanese Patent Application No. 2015-056707, filed in Japan, the contents of which are incorporated here.
Background technique
[0002]
　Conventional, paper money, stock certificates, securities, and such as gift certificates and even more credit card, pharmaceuticals, food products, in products such as luxury brands, the anti-counterfeit media in order to prevent unauthorized use by counterfeiting or copying of goods It has been used. The securities, forgery prevention medium is directly printed or transferred. Further, seal seals and tags forgery prevention medium is provided has been granted to the product.
　However, in recent years, it determines whether are manufactured illegal securities, and products that are also forgery or duplication preventing forgery medium, positive product or unauthorized goods only in the presence of the medium for preventing forgery (counterfeit goods reproductions) it is difficult.
[0003]
　As an example of the above-described forgery prevention medium, and a diffraction grating or hologram color and pattern varies with viewing angle. Further, there is such another example color and brightness varies as OVD (Optically Variable Device) ink and the pearl pigment of the medium for preventing forgery.
　However, whether anti-counterfeit medium is counterfeit is true or is attached is easily determined according to the visual inspection of the comparison or expert true medium for preventing forgery, a general user can easily forged visually it is difficult to perform the authenticity determination of the prevention medium.
[0004]
　If you can not authenticity determination of the medium for preventing forgery visually, the viewing angle and viewing position special authenticity determination device that can precisely control the image pickup device in the medium for preventing forgery (e.g., see Patent Document 1) is used.
　However, the handling of the authenticity determination apparatus, requiring specialized knowledge or special equipment, it is difficult for general users perform authenticity determination of the medium for preventing forgery by using such an apparatus.
[0005]
　Further, when determining the authenticity of the medium for preventing forgery optical change of a pattern to be observed by the predetermined observation angle occurs because the optical change in the pattern observed in accordance with the observation angle is different imaging to observe the medium for preventing forgery it is necessary to estimate the viewing angle which determines the imaging direction of the device. When the estimation of the viewing angle, tilt sensor such as a gyro sensor incorporated in the image capturing apparatus is used in the conventional.
　Moreover, detecting the viewing angle and viewing position etc. inclination sensor, in a suitable viewing angle and viewing position for determining the authenticity, it is conceivable to imaged by imaging device a captured image of the medium for preventing forgery.
[0006]
　However, the general users, it is impossible to precisely grasp and manipulate the position relationship between the image capturing apparatus and the medium for preventing forgery. Therefore, from the appropriate viewing angle and the observation position can image the hologram, it is difficult to image the medium for preventing forgery by imaging apparatus.
　The relative viewing angles and observing the position of the medium for preventing forgery with respect to the image capturing apparatus, the pattern observed changes. Therefore, in order to accurately determine the viewing angle of the image capturing device relative to the medium for preventing forgery, it is necessary to detect each of the angle and position of the image pickup device and a medium for preventing forgery. Therefore, it is necessary to mount the sensor inclination to both the imaging device and the medium for preventing forgery.
CITATION
Patent Literature
[0007]
Patent Document 1: Japanese Patent Publication No. 3,865,763
Summary of the Invention
Problems that the Invention is to Solve
[0008]
　The present invention has been made in view of the above circumstances, without using a conventional special authenticity determining apparatus as, and without depending on the installation situation of the medium for preventing forgery, simple as generic digital camera such a imaging apparatus, authenticity determining a captured image to be used for (real or counterfeit or identification), easily captured in a suitable viewing angle and viewing position, capable of performing authenticity determination of the anti-counterfeit medium identification device, identification method, a computer readable medium including an identification program, and identification program.
Means for Solving the Problems
[0009]
　The first aspect of the present invention is an identification device for performing authenticity determination of articles forgery prevention medium is attached, the medium for preventing forgery pattern of light changes can be observed as the viewing angle changes with the viewing angle the observation target shape image showing the shape of the medium for preventing forgery of observing the observation object shaped frame display unit that displays the display image data is a captured subject image of image capturing apparatus on the display screen, the observation target shape image the shape similarity calculation unit for calculating a shape similarity between the outer shape of the medium for preventing forgery of the imaging target on the display screen, the shape similarity by whether a preset shape threshold value or more, the image and and an imaging determination unit for performing viewing angle and viewing position whether the imaging determination correct imaging device.
[0010]
　The second aspect of the present invention is the identification apparatus of the first embodiment, showing the viewing angle and viewing position for imaging the medium for preventing forgery, a shape of the medium for preventing forgery was observed from the appropriate viewing angle and viewing position further comprising an observation target shape image generation unit for generating the observation target shape image showing.
[0011]
　The third aspect of the present invention is the identification apparatus of the first or second aspect, compared with the captured image data to which the anti-counterfeit medium is captured, the correct image data in the correct pattern of the medium for preventing forgery, wherein performing a similarity calculation section for obtaining the similarity between the captured image data and the correct image data, by whether more than the degree of similarity is predetermined threshold, determining the authenticity of whether the or medium for preventing forgery is correct further comprising a authenticity judging unit.
[0012]
　The fourth aspect of the present invention is the identification apparatus of the third embodiment, the authentication judgment section, and each of the plurality of different observation target shape image captured image data captured in response to the of the captured image data corresponding to observation target shape image by comparing the correct image data, respectively, performing authenticity determination by determining whether or not each of the similarity between the captured image data and the correct image data exceeds the threshold value.
[0013]
　A fifth aspect of the present invention is compared, in the identification device of the third or fourth aspect, the captured image data imaged, the plurality of different types of the correct image data from the low-resolution candidate image data of the medium for preventing forgery and, the highest candidate image data similarity further includes a candidate image data extraction unit for extracting, the similarity calculation section calculates the similarity of the candidate image data to which the candidate image data extracting portion is extracted.
[0014]
　A sixth aspect of the present invention is the identification apparatus of any one of the fifth aspect of the first, includes a notification function of notifying an image capturing direction of said anti-counterfeit medium corresponding to the observation target shape image.
[0015]
　A seventh aspect of the present invention is identification method for performing authenticity determination of articles forgery prevention medium is attached, the observation target shape frame display section, the pattern of light can be observed as the viewing angle changes varies the the observation target shape image showing the shape of the medium for preventing forgery when the anti-counterfeit medium was observed with the viewing angle, and displays the display image data is the image of the imaging target of the imaging apparatus on the display screen, the shape similarity calculation part calculates the shape similarity between the outer shape of the medium for preventing forgery of the imaging target on the display screen and the observation target shape image, the imaging determining unit, said shape similarity degree is preset shapes threshold above according to whether, perform viewing angle and viewing position whether the imaging determination correct the image capturing apparatus.
[0016]
　An eighth aspect of the present invention is identification program, the observation target showing the shape of the medium for preventing forgery when the anti-counterfeit medium was observed with the observation angle at which the pattern of light can be observed as the viewing angle changes varies the shape image, and displays the display image data is a captured subject image of image capturing apparatus on the display screen, calculates the shape similarity between the outer shape of the medium for preventing forgery of the imaging target on the display screen and the observation target shape image and, depending on whether the shape similarity is preset shape equal to or larger than the threshold, the observation angle and the observation position of the image capturing apparatus performs the correct whether imaging determination, said anti-counterfeit medium is attached operating the computer to perform the authenticity determination method of an article.
[0017]
　Ninth aspect of the present invention is a computer a readable medium, showing the shape of the medium for preventing forgery when the anti-counterfeit medium was observed with the observation angle at which the pattern of light can be observed as the viewing angle changes changes observed the target shape image, to display the display image data is a captured subject image of image capturing apparatus on the display screen, the shape similarity between the outer shape of the medium for preventing forgery of the imaging target on the display screen and the observation target shape image calculated, the by whether the shape similarity is lower than a preset shape threshold, performs the viewing angle and viewing position whether the imaging determination correct the image capturing device, said anti-counterfeit medium is attached operating the computer to perform a has been authenticity determination method of the article, including the identification program.
Effect of the invention
[0018]
　According to an aspect according to the present invention, without using a conventional special authenticity determining apparatus as, and without depending on the installation situation of the medium for preventing forgery, a simple image capturing apparatus such as a general-purpose digital camera the authenticity determination (real or counterfeit or identity) the captured image to be used for easily captured in a suitable viewing angle and viewing position, capable of performing authenticity determination of the anti-counterfeit medium identification device, the identification method, identification program, and it is possible to provide a computer readable medium including identification program.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019]
FIG. 1 is a block diagram showing a configuration example of the identification device according to the first embodiment.
It is a diagram illustrating a viewing angle of the imaging unit 101 with respect to FIG. 2 the medium for preventing forgery.
3 is a plan view schematically showing a forgery prevention medium according to the first embodiment.
[Figure 4] a cross section taken along line Z-Z of the anti-counterfeit medium shown in FIG. 3 is a cross-sectional view schematically showing.
FIG. 5 is a perspective view showing an example of a first uneven structure of the anti-counterfeit medium according to the first embodiment.
6 is a perspective view showing an example of the second concave-convex structures of the anti-counterfeit medium according to the first embodiment.
[7] a state in which the second concave-convex structure section emits the diffracted light is a diagram schematically showing.
Is a conceptual diagram showing the displayed observation target-shaped frame in FIG. 8 display unit 11.
It is a top view illustrating the alignment of the through-image 500 of FIG. 9A] observed object shaped frame 100 and the anti-counterfeit medium 400 described in FIG.
Is a side view illustrating the alignment of the through-image 500 of FIG. 9B] observed object shaped frame 100 and the anti-counterfeit medium 400 described in FIG.
It is a top view illustrating the alignment of the through-image 500 of FIG. 10A] observed object shaped frame 100 and the anti-counterfeit medium 400 described in FIG.
Is a side view illustrating the alignment of the through-image 500 of FIG. 10B] observed object shaped frame 100 and the anti-counterfeit medium 400 described in FIG.
It is a top view illustrating the alignment of the through-image 500 of FIG. 11A] observed object shaped frame 100 and the anti-counterfeit medium 400 described in FIG.
Is a side view illustrating the alignment of the through-image 500 of FIG. 11B] observed object shaped frame 100 and the anti-counterfeit medium 400 described in FIG.
It is a diagram illustrating a configuration example of a captured image data table and authenticity determination image data table stored in the FIG. 12A] image data storage unit 113.
It is a diagram illustrating a configuration example of a captured image data table and authenticity determination image data table stored in the FIG 12B] image data storage unit 113.
[13] The present embodiment is a flowchart showing an operation example of the processing of the authentication judgment for authenticity determination target using the medium for preventing forgery in the identification device
using the medium for preventing forgery of the identification device of FIG. 14 embodiment is a flowchart showing an operation example of the processing of the authentication judgment for authenticity determination target.
15 is a flowchart showing an operation example of the processing of the authentication judgment for authenticity determination target using the medium for preventing forgery in the identification apparatus of the second embodiment.
Is a flowchart showing an operation example of the processing of the authentication judgment for authenticity determination target using the medium for preventing forgery in FIG. 16 identifying apparatus of the present embodiment.
17 is a block diagram showing a configuration example of the identification device according to the third embodiment.
DESCRIPTION OF THE INVENTION
[0020]
First Embodiment
　Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
　Figure 1 is a block diagram showing a configuration example of the identification system (authenticity determination device or identification device) according to the first embodiment. In Figure 1, the authenticity determination apparatus 1 includes an imaging unit 101, the imaging control unit 102, the exposure control unit 103, the illumination unit 104, the observation target shape image generating unit 105, the observation target shape image display unit 106, the shape similarity calculating unit 107 includes imaging determination unit 108, correct image generating unit 109, the similarity calculating unit 110, the authenticity determination unit 111, each of the display unit 112 and the image data storage unit 113. Identification system of the present embodiment is integrated with the imaging unit 101 and the illumination unit 104 has a configuration corresponding to the processing of authenticity determination of the medium for preventing forgery that a retroreflective.
[0021]
　Imaging unit 101 is, for example, a camera using an image sensor such as CCD (Charge Coupled Device) or CMOS (Complementary Metal Oxide Semiconductor), an image of the captured object as captured image data, the image data storage unit 113 to be written in memory against.
　Imaging control unit 102 includes an imaging unit the captured image data is an image obtained by imaging the pattern of the light emitted from the medium for preventing forgery (image such as light color (wavelength) or characters or pictures) to the incident light when 101 takes an image, controls the depth of focus, sensitivity (ISO (International Organization for Standardization) sensitivity) imaging condition of the imaging unit 101, such as the imaging element.
[0022]
　The exposure control unit 103, as a condition of the imaging exposure, shutter speed, aperture value, the presence or absence of illumination light, to control the imaging condition of the imaging unit 101, such as the intensity of the illumination light. The exposure control unit 103 corresponds to the brightness around the medium for preventing forgery imaging authenticity determination device 1, emits light (illumination light) for imaging the illumination unit 104 as needed during imaging and thereby it outputs a light emission instruction.
　Lighting unit 104 is not the normal imaging subject only illumination to irradiate continuously light, be a light-emitting device called a flash or strobe (R) for irradiating light in a short time with respect to the imaging target good. The illumination unit 104 corresponds to the light emission instruction from the exposure control unit 103, irradiates a predetermined light intensity to the object to be imaged. Imaging control unit 102 supplies a control signal indicating the imaging timing to the exposure control unit 103. Thus, the exposure control unit 103, in correspondence with the control signal indicating the imaging timing supplied from the imaging control unit 102, as described above, light emission to emit illumination light to be irradiated on the medium for preventing forgery with respect to the illumination unit 104 and outputs an instruction.
[0023]
　Observation target shape image generation unit 105 indicates the viewing angle and viewing position for imaging the medium for preventing forgery is judged target observation object shape showing the outer shape of the medium for preventing forgery is observed from the appropriate viewing angle and viewing position frame (i.e., the observation target shape image) is generated. Observation target shape image generation unit 105 when imaging the medium for preventing forgery, to properly image the pattern of emission of the medium for preventing forgery, in a position for imaging by the imaging section 101 in the three-dimensional space existing imaging targets in correspondence to each of a certain observation position (coordinates) and viewing angle (imaging direction) of the imaging unit 101 obtains the image of the observed object shaped frame which is the outer shape of the medium for preventing forgery with the coordinate conversion formula.
　Observation target shape image generating unit 105, the generated observation target shaped frame, in association with the observation object shaped frame identification information for identifying the observation target-shaped frame, and stores write with respect to the observation object shaped frame table.
[0024]
　Here coordinate conversion formula used is as preprocessing for performing authentication judgment processing for forgery prevention medium provided in authenticity determination target (ready to do authentication judgment processing), pre-calibration of plural image data (to be described later when reproducing the three-dimensional space from the captured image data) obtained by imaging the board is a type that is generated when associating the coordinate position at a plurality of positions and three-dimensional space of the pixels in the two-dimensional coordinates of the captured image data. Previously generated coordinate conversion formula, the image data storage unit 113, it is stored in advance authenticity determination target or written for each authenticity determination target.
　Further, the above-mentioned observation target shaped frame table, are written in the image data storage unit 113, corresponding to the observation target shaped frame identification information, and the observation target shaped frame identification information, the observation object shape pointed observation object shaped frame identification information and information viewing angle and viewing position when that generated the frame is written as a set.
[0025]
　In the present embodiment, it is necessary to camera calibration with respect to the imaging unit 101 in advance (camera calibration) is performed. The camera calibration, in advance of the three-dimensional shape is known calibration board imaged once or several times in the imaging area, the captured one or more three-dimensional coordinates of the three-dimensional space by using the captured image data a coordinate point in the system, taking the corresponding plurality of coordinate points of the coordinate points in the two-dimensional coordinate system of the captured image data (two-dimensional pixels). Thus, the relative positional relationship between the imaging unit 101 and the calibration board (hereinafter, the external parameter) and the coordinate conversion formula that indicates the light ray incident direction vector in the optical center and each pixel of the imaging unit 101 (two-dimensional pixels), the lens strain such as (hereinafter, the internal parameters of the imaging unit 101) estimates the.
[0026]
　That is, in the present embodiment, the observation target for shape image generating unit 105 estimates the viewing angle of the observation target-shaped frame, 2 dimensional images of the captured calibration board from a plurality of different viewing directions captured previously by the imaging unit 101 from, that reconstructs the global coordinate system (three-dimensional coordinate system) from the captured image data of the multi-view. A coordinate point in the three-dimensional coordinate system reconstruction in the same pixel, the coordinate conversion formula that indicates the correspondence between the coordinate points in the two-dimensional coordinate system of the captured image data by the imaging unit 101 has captured the previously obtained during camera calibration .
[0027]
　As described above, in the estimation of the viewing angle of the present embodiment, pre and camera calibration (camera calibration) is performed on the imaging unit 101, the imaging when the authenticity discrimination process of the medium for preventing forgery in the identification system running internal parameters parts 101 is known and the three-dimensional shape of the authenticity determination target and anti-counterfeit medium is known. Thus, it imaged from a plurality of different positions captured image data of the medium for preventing forgery, a plurality of corresponding point information between the two-dimensional coordinate system of the pixel of the coordinate point and the captured image data in a three-dimensional coordinate system by the coordinate conversion formula obtain. We can estimate the relative positional relationship between the medium for preventing forgery with the imaging unit 101 from the plurality of corresponding points coordinates. Similarly, when imaging only once forgery prevention medium, in one of the captured image data, a plurality of corresponding point information between the coordinate point and the two-dimensional coordinate system of a pixel in the three-dimensional coordinate system by the coordinate conversion formula obtain. We can estimate the relative positional relationship between the medium for preventing forgery with the imaging unit 101 from the plurality of corresponding points coordinates. That is, the observation position and the observation angle (imaging direction) of the imaging unit 101 at the time of capturing a medium for preventing forgery can be estimated.
[0028]
　In the present embodiment, for example, as the camera calibration, which is one of the well known techniques, analysis method according Z.Zhang (Z.Zhang, "A flexible new technique for camera calibration", IEEE Transactions on Pattern Analysis and Machine Intelligence, Vol.22, No.11, pages 1330-1334, it is possible to apply 2000), to estimate the viewing angle at the time of capturing the image data. However, in estimating the viewing angle by applying the analysis method by the Z.Zhang, captured image data to be input to the identification system, the focal point similar to the focus fixed at the camera calibration (preferably identical focal point) in needs to be captured image data.
[0029]
　External parameters described above is a 3 × 4 matrix consisting of a rotating component and translational component, the matrix P. Further, the internal parameters are matrix 3 × 3, and the matrix A. Anti-counterfeit medium 400 (details will be described later) of the three-dimensional coordinates of a point on the X, Y, and Z, the two-dimensional pixel coordinates of the anti-counterfeit medium 400 reflected in the captured image x, When y, the following (1) relationship is established as indicated by expression.
[0030]
[Number 1]

[0031]
　In the above (1), s is a scaling parameter, the same value as 3 × 1 matrix th components after calculating the right side. Internal parameters are known, if calculates the external parameters by a particular viewing angle and the observation position for observing the light pattern used for authenticity determination, (1) the matrix A and the matrix P of equation is a known value, three-dimensional coordinates X of a point on the medium for preventing forgery 400, Y, the Z, 2-dimensional coordinate x of a point on the image of the observed object shaped frame, can be converted to y. Three-dimensional coordinates X of a point on the medium for preventing forgery 400, Y, coordinate system Z (hereinafter referred to as the world coordinate system) for the direction of the origin and coordinate axes of the coordinate system may be set arbitrarily.
[0032]
　When anti-counterfeit medium 400 is a flat plate, made in general to the origin either a point on the upper surface of the observed anti-counterfeit medium 400, the imaging target surface by the imaging unit 101 captures an image from the X-axis and Y-axis 2 taken dimension coordinate system, a Z-axis in a direction perpendicular to the two-dimensional coordinate system. Also, the unit must be the same as when the camera calibration. For example, when the calculated internal parameter during camera calibration in the world coordinate system in mm, the world coordinate system of the computing time of the observation object shaped frame also, if in mm as in the case of calibration, the shape of the observation target shaped frame There no longer matches the shape of the anti-counterfeit medium 400 is observed from a particular viewing angle and viewing position.
[0033]
　3D 3 × 3 rotation matrix of the external parameter is R, the three-dimensional translational matrix of 3 × 1 and t. The components in the three-dimensional rotation matrix R shown in the following equation (2).
[0034]
[Number 2]

[0035]
　3D translation matrix showing the components at t in the following equation (3).
[0036]
[Number 3]

[0037]
　Also shows the components of the external parameter P in the following equation (4).
[0038]
[Formula 4]

[0039]
　The camera lens center of the imaging unit 101 as an origin, z-axis of the lens front direction, a three-dimensional coordinate system, respectively the same direction and the x-axis · y axis on the captured image and the x-axis · y-axis is referred to as a camera coordinate system. Units of each coordinate of the camera coordinate system is the same as the world coordinate system. Each of the three-dimensional rotation matrix R and a 3D translation matrix t is determined by the three-dimensional relative positional relationship between the camera coordinate system and the world coordinate system. 3D translation matrix t is a three-dimensional position of the origin of the world coordinate system as viewed from the camera coordinate system. 3D rotation matrix R, when rotated to match the coordinate axes of the camera coordinate system to the coordinate axes of the world coordinate system is a three-dimensional rotation matrix to be multiplied by the coordinate axes of the camera coordinate system.
[0040]
　From the above, when the internal parameter A is known, by defining the world coordinate system of the medium for preventing forgery 400, the specific viewing angle and a relative relationship between the camera coordinate system in the world coordinate system and the imaging device when imaging the observation position it is possible to calculate the external parameter P is. Thus, (1) can be a particular point of the medium for preventing forgery 400 (coordinate points) is calculated or hits any point of the observation object shaped frame in the captured image (coordinate points) from the equation, the image of the observation target shaped frame it can be calculated.
[0041]
　Observation target shape image display unit 106, together with the through image imaging unit 101 captures an image as the imaging data (the display image data is the image of the imaging target of the imaging unit 101), an observation object shaped frame with respect to the display screen of the display unit 112 to display.
　Display unit 112 is a display panel for displaying the results of the imaging data and the authentication judgment captured, for example constituted by a liquid crystal display panel.
[0042]
　Figure 2 is a diagram for explaining the viewing angle of the imaging unit 101 relative to the medium for preventing forgery. In FIG. 2, the anti-counterfeit medium 400 is used, for example, paper money, stock certificates, vouchers, such as gift certificates or and securities such as credit card,, pharmaceuticals, food products, to counterfeiting and duplication of products such as luxury brands . Anti-counterfeit medium 400 is printed or transferred directly to a cash voucher and securities, also been printed or transferred to sealed seal or tag is attached for products (or product package).
[0043]
　In Figure 2, anti-counterfeit medium 400 is provided for the surface of the credit card 300. The medium for preventing forgery 400, in this embodiment, for example, viewing angle by include grating or hologram color or pattern changes, also the viewing angle by Ya OVD (Optically Variable Device) ink color or brightness changes or the like can be used pearl pigment (details will be described later). Light source (also referred to as illumination) 200, the irradiation angle β is the angle between the illumination direction 200A and the normal 350 of the light with respect to the medium for preventing forgery 400 is irradiated with light for imaging. When light for imaging is incident, anti-counterfeit medium emits a pattern of a predetermined light. By each of the observation angle α and irradiation angle beta, the pattern of light emitted from the medium for preventing forgery in response to the irradiation light is different.
[0044]
　Here it will be described in detail forgery prevention medium 400.
　Anti-counterfeit medium 400, the diffractive structure may also be such as a hologram that emits various diffracted light. In this case, the hologram may be used reflective type, transmissive type, phase type, various holograms such as volume type.
　In Hereinafter, only components of an example of a relief-like structure, in particular having an uneven structure.
[0045]
　As a method for forming the irregular structure, such as the first concavo-convex structure 310 and the second relief structure 320 is formed on the relief structure-forming layer 302, as shown in FIGS. 3 and 4, the metallic stamper such using radiation curable molding or extrusion molding, it is possible to use various methods such as hot press molding.
　The first relief structure 310 has a grooved structure including a concave or convex portion, a so-called relief type diffraction grating structure, or a plurality of linear recesses or projections having a uniform direction are respectively formed region the a, it is possible to use an uneven structure such as directional scattering structure in which the direction is from different regions combination of each other.
[0046]
　Many common normal of the diffraction grating used in the display body, the spatial frequency is 500 to 1600 / mm, such as by a spatial frequency or orientation of the diffraction grating, the user viewing from a fixed direction, a different color it is possible to display.
　In contrast, the directional scattering structure includes a plurality of light-scattering structure 331 takes a constant alignment direction 332 within a particular segment or cells as shown in FIG. These light scattering structure 331, each of which is straight, in the particular segment or cells, are arranged substantially parallel.
[0047]
　However, each light-scattering structure 331 need not be completely parallel, so long as the region of the directional scattering structure 330 has a scattering power having a sufficient anisotropy, a portion of the light scattering structure 331 the longitudinal direction of the longitudinal and the other part of the light scattering structure 331 may be crossed.
　By taking the above structure, by irradiating light from a vertical oblique direction to the orientation direction 332, when observing the region consisting directive scattering structure 330 from the front, due to the high light scattering power, it looks relatively brighter.
　On the other hand, by irradiating light from a vertical oblique direction to the optical scattering axis 333, when observing region including the directional scattering structure 330 from the front, due to low light scattering power, so that the look relatively dark.
[0048]
　Accordingly, in the segment or cell containing such a light scattering structure 331, by providing the alignment direction 332 arbitrarily for each segment or cell patterns by a relatively dark portion combined with a relatively bright portion is formed, observed by position or changing the position of irradiating the light to be observed, such as reversal of brightness it is observed.
　The first relief structure 301 can be provided a structure, such as the relief type diffraction grating structure or directive scattering structure alone or in a composite manner, not necessarily limited thereto.
[0049]
　Also shows an example of a structure usable in the second relief structure 320 in a perspective view in FIG.
　The second concave-convex structures 320 shown in FIG. 6, a plurality of protrusions 321 are provided. Here, the second concave-convex structures 320 by only the plurality of protrusions 321 are formed, this is only an example, in the present embodiment, the second concave-convex structures 320 using a plurality of recesses it can be formed.
　The surface area of a single concave or convex portion provided on the second concave-convex structure 320 of the present embodiment, the occupied area needed to sequence a single concave or convex portions to the relief structure-forming layer 302 surface 1 it is preferably .5 times or more.
[0050]
　By surface area of a single concave or convex portion is not less than 1.5 times the occupied area, it is possible to obtain good low reflectivity, a low scattering. That becomes a first uneven structure and the distinctly different color tones, in order to easily recognize when captured by the imaging unit 101. On the other hand, when the surface area of the single recesses or protrusions is less than 1.5 times the occupied area is not preferable because the reflectance is high.
　The shape to be used in a plurality of recesses or protrusions of the second concave-convex structure 320 is formed on the relief structure-forming layer 302, it is desirable that the forward tapered shape.
[0051]
　Here, the forward tapered shape refers to the case where parallel sectional area to the substrate surface of the concave or convex portion is formed so as to decrease as it goes from the base to the tip of the concave or convex portion. Specifically, conical, pyramidal, elliptical cone shape, a columnar shape or a cylindrical shape, prismatic or rectangular tube shape, frustoconical, truncated pyramidal, truncated elliptical cone shape, a conical columnar or cylindrical bonded shape, the shape formed by joining pyramid in prismatic or rectangular tube, hemisphere, semi-ellipsoid bullet, and the like can be given shape in which the bowl type.
　As shown in FIG. 6, the irradiation in the second concave-convex structures 320, when the distance between the centers of adjacent recesses or protrusions is constant, as shown in FIG. 7, the light in the second concave-convex structures 320 Then, the second concave-convex structures 320, the traveling direction of the incident light 501 emits a diffracted light in a specific direction.
[0052]
　For general diffracted light can be expressed by the following equation.
　　　d (sinα ± sinβ) = nλ ... (5)
　In (5), d represents the distance between the centers of the recesses or projections, lambda represents the wavelength of incident light and diffracted light. Further, alpha is the incident angle of the incident light, beta denotes the exit angle of the diffracted light, n is the order, the most representative diffracted light is considered since 1 is order diffracted light, n = 1 and be able to.
　Here, the incident angle alpha, 0-order diffracted light That can be considered an injection angle of the specular reflection light same as, also, alpha, beta is a normal direction, i.e. to the display body, clockwise from the Z axis in FIG. B the direction is a positive direction. Thus, equation (5) is expressed as follows.
　　　d (sinα-sinβ) = λ ... (6)
　Therefore, when the the center-to-center distance d of the recesses or protrusions, a constant exit angle α of the incident angle or zero-order diffracted light, as is clear from (6) , 1 exit angle β of the order diffracted light 503, changes according to the wavelength lambda. Therefore, if the illumination light is white light, varying the viewing angle of the rugged structure portion, the imaging unit 101 changes the color to be imaged.
[0053]
　The second relief structure 320, with respect for the distance between the centers of respective recesses or protrusions are the following forward tapered shape 400 nm, which is the almost black in the imaging from the normal direction, the particular condition in the lower i.e. the environment of the angle of incidence of the white light α is 60 ° ~ 90 °, the exit angle of the first-order diffracted light 503 of the light of a specific wavelength | becomes possible to design in the vicinity of the incident angle | beta.
　For example, the incident angle alpha = 60 °, when the d = 340 nm, lambda = exit angle with respect to 600 nm | beta | is approximately 64 °.
[0054]
　In contrast, the first concave-convex structure 310, since that is a so-called diffraction grating structure, it is difficult to set an exit angle of first-order diffracted light in the vicinity of the incident angle.
[0055]
　Therefore, in the identification operation by authenticity determination device 1, a light source 200 and by the vicinity and relatively imaging unit 101, it can capture a clear color change of the in certain conditions the second rugged structure portion 320 to become.
[0056]
　Moreover, anti-counterfeit medium 400 is, for example, configured to utilize surface plasmon propagation occurs by providing and microstructures such as nanometer sized fine pores on the surface, or by controlling the depth of the concavo-convex structure, incident it may have a structure to take advantage of the structural color to control the color of the reflected light or transmitted light to light.
　Moreover, anti-counterfeit medium 400 is, for example, configured so as to take advantage of the recursive reflection characteristics of the microspheres or spherical structure, by providing a reflection characteristic forms a gradient in the surface structure of the micro areas, the incident light only in a specific direction configured as an angle control mirror for reflecting / transmitting, or may have a structure such as a printed material having a concavo-convex shape provided by intaglio printing.
[0057]
　Moreover, anti-counterfeit medium 400 is, for example, by arranging a large number of walls having a height that is utilized in such prevention film peep on the narrow area, such as to utilize a structure that limits the viewing zone configuration, surface configured so as to take advantage of the parallax barrier system in which the image formed on the back surface by viewing zone by thin wires provided at specific intervals above is limited appear to vary, or, a lenticular lens or a microlens array by using such, it may have a configuration utilizing a look image formed in the back of the lens is changed.
　Moreover, anti-counterfeit medium 400 is, for example, pearl pigment may have a structure provided by a printing metal oxide coated mica.
[0058]
　Anti-counterfeit medium 400 is, for example, by a thin film such as a refractive index different transparent materials and metals are provided a plurality of layers, configured to utilize a multilayer film in which the color varies with angle of reflection or transmission angle of incident light by interference phenomena, structure in which the like printed by crushing multilayer thin film into flakes as a pigment, structure particles cause interference phenomenon by coating a thin film by chemical treatment to fine particles are provided by a printing, a cholesteric liquid crystal like the may have a configuration as to take advantage by immobilizing a liquid crystal material typified polymer. The liquid crystal material, the use of liquid crystal material disposed planar, may be used liquid crystal material provided by a printing after pigment by addition of crushing.
[0059]
　Moreover, anti-counterfeit medium 400 is, for example, iron oxide, chromium oxide, cobalt, and gave the directivity to reflected light or transmitted light, such as by providing a surface shape is oriented by the magnetic force of the magnetic material typified by ferrite configuration using magnetic orientation materials, configuration providing a multilayer film by adding chemical treatment as described above the magnetic orientation material as the core, and, nanometer sized typified by silver nanoparticles or quantum dots it may have a configuration utilizing an optical effect caused by the particles.
[0060]
　Returning to Figure 2, normals 350 is a normal of a surface direction of the surface 300A of the credit card 300. Viewing angle α is the angle between the imaging direction 101A and the normal 350 of the imaging unit 101. Here, for example, the observation object shape image generating unit 105, a direction parallel to a normal 350 to the z-axis, so that each side of the credit card 300 is parallel to the respective x and y axes, credit card the placing in a three-dimensional coordinate system. For example, one of the vertices formed by the sides of the credit card 300, to match the origin O of the three-dimensional coordinate system in the three-dimensional coordinate system, two-dimensional comprising a credit card 300 from the x-axis and y-axis placed in a plane. Therefore, the thickness direction of the credit card 300 is parallel to the z axis. The three-dimensional shape of a credit card 300, as previously known information, with the formula of coordinate transformation already mentioned, it is stored previously written in the image data storage unit 113.
[0061]
　Figure 8 is a conceptual diagram showing an observation object shape frame displayed on the display unit 112. 8 to the display unit 112 through image is displayed to be imaged as the imaging data, the observation object shaped frame 100 at a predetermined position of the display portion 112 are displayed by the observation target shape image display unit 106. This observation object shape frame 100 illustrates an outer shape of the medium for preventing forgery by broken lines, may be another line segment shape such as a solid line, it may be a transparent image shape of forgery prevention medium has been projected (silhouette), can also be rectangular (e.g. square) in shape a long if the vertices of the image, the use of any to any image displaying appropriate viewing angle and the outer shape of the medium for preventing forgery is observed from the observation position (or the overall shape) . In FIG. 8, for example, an example in which the observation target-shaped frame of the medium for preventing forgery of the rectangle is displayed on the display unit 112.
[0062]
　Each of FIGS. 9A ~ FIG. 11B is a diagram illustrating the alignment of the through image 500 to be observed shaped frame 100 and the anti-counterfeit medium 400 described in FIG. The observation target-shaped frame is an image seen outer shape of the medium for preventing forgery, it indicates that an image of the outer shape of the medium for preventing forgery is an image of a frame composed of straight lines.
　Figure 9A is a top view showing the through image 500 to be observed shaped frame 100 and the anti-counterfeit medium 400 at the position relationship between the authenticity determination apparatus 1 and the medium for preventing forgery 400 in FIG. 9B to be described later. Figure 9B is a side view of FIG. 9A, in FIG. 9B, the imaging direction of the imaging unit 101 is parallel to the normal of the surface of the anti medium 400. Therefore, an observation target-shaped frame 100 which has a shape corresponding to a predetermined angle with respect to the normal of the surface of the medium for preventing forgery 400, preventing forgery that is parallel to the normal of the surface of the medium for preventing forgery 400 It does not coincide with the through image 500 of the medium 400.
[0063]
　Figure 10A is a top view showing the through image 500 to be observed shaped frame 100 and the anti-counterfeit medium 400 at the position relationship between the authenticity determination apparatus 1 and the medium for preventing forgery 400 in FIG. 10B to be described later. Figure 10B is a side view of FIG. 10A, in Figure 10B, not parallel to the normal to the surface of the image pickup direction anti-counterfeit medium 400 of the imaging unit 101, and the normal and the imaging direction of the surface of the medium for preventing forgery 400 Although but it has an angle, not in the predetermined angle for imaging a pattern of the observation light. Therefore, an observation target-shaped frame 100 which has a shape corresponding to a predetermined angle with respect to the normal of the surface of the medium for preventing forgery 400, does not coincide with the through image 500 of the medium for preventing forgery 400.
[0064]
　Figure 11A is a 示上 view and a through image 500 to be observed shaped frame 100 and the anti-counterfeit medium 400 at the position relationship between the authenticity determination apparatus 1 and the medium for preventing forgery 400 in FIG. 11B to be described later. Figure 11B is a side view of FIG. 11A, in FIG. 11B, and has a predetermined angle of the imaging direction of the imaging unit 101 to observe normal and light pattern of the surface of the anti medium 400. Therefore, an observation target-shaped frame 100 which has a shape corresponding to a predetermined angle with respect to the normal of the surface of the medium for preventing forgery 400, are coincident with the through image 500 of the medium for preventing forgery 400.
[0065]
　Returning to Figure 1, the shape similarity calculating unit 107 calculates the shape similarity between the outer shape of the medium for preventing forgery imaging target in the observation target-shaped frame and the display screen. For example, the shape similarity calculating unit 107 calculates the mean square error of the distance between corresponding pixels in the two-dimensional coordinates of the outer shape of the observation target shaped frame with forgery prevention medium, the mean square error as a shape error, the shape the inverse of the error and shape similarity.
　Imaging determination unit 108, the shape similarity shape similarity calculating unit 107 is required, depending on whether a preset shape threshold above, the viewing angle and viewing position whether the imaging determination correct imaging apparatus do. The imaging determination unit 108, when the shape similarity is equal to or higher than the shape preset threshold, via the imaging control unit 102 to perform the image pickup of the image data to the imaging unit 101.
[0066]
　12A and 12B are diagrams showing a configuration example of a captured image data table and authenticity determination image data table stored in the image data storage unit 113. Figure 12A is captured image data by the imaging unit 101 has captured indicates a configuration example of a captured image data table stored. 12A is a captured image identification information for identifying the captured image data, and the observation object shaped frame identification information for identifying the observation target shaped frame used at the time of capturing the image data, addresses captured image data is written as is set the captured image data address indicating the, in the image data storage unit 113 written and stored.
[0067]
　Figure 12B includes an imaging unit 101 shows a configuration example of authentication judgment pickup image data table information of correct image data is stored to be compared with the captured image data obtained by imaging. 12B is a photographed image identification information for identifying the captured image data, and correct the image data address indicating an address correct image data is stored to be compared with the captured image data indicated by the captured image identification information, image data and as it sets and each of the similarity of the correct image data, written in the image data storage unit 113 are stored.
[0068]
　Returning to Figure 1, correct image generator 109 generates the correct image data to be used for comparison with the captured image data corresponding to the observation object shaped frame. The correct image data is image data observed from the same viewing angle and captured image data is obtained from the captured image data obtained by imaging the pre-simulation and pre-forgery prevention medium 400 corresponds to the structure of the medium for preventing forgery 400 . As already explained, anti-counterfeit medium 400, if a configuration which is formed from the diffraction grating or holographic, if a structure formed from OVD inks and pearl pigment comprising a pigment wherein the metal oxide is coated on mica when it is formed constituted by stacking repeatedly layers of different refractive index, it may be configured that is formed from a cholesteric liquid crystal.
[0069]
　Accordingly, correct image generation unit 109, in response to the above case, respectively, and generates the correct image data. For example, if the configuration forgery prevention medium 400 is formed by using a diffraction grating, based on design information of the diffraction grating, correct image observation angle as a parameter of the anti-counterfeit medium 400 corresponding to the observed object shaped frame 100 generated using the function to generate is calculated by simulation correct image data. Correct image generation unit 109, in correspondence to the captured image identification information of the captured image data to be compared, reads the observation object shaped frame identification information from the captured image data table for authenticity determination. Also, correct image generating unit 109, by the imaging object shape identification information, from the observation target shaped frame table, reads the viewing angle and viewing position corresponding to the observation target shaped frame used for imaging of the captured image data.
[0070]
　The correct image generator 109, the generated correct image data is stored is written to the image data storage unit 113, the start address of the written area and the correct image data address. Correct image generating unit 109, corresponding to the captured image identification information of the captured image data to be compared, thereby writing and storing said correct image data address to the captured image data table for authenticity determination of the image data storage unit 113.
[0071]
　Also, in the case of OVD inks and pearl pigment, when repeatedly laminated layers having different refractive index, for the calculation is not possible subject with the function of the correct image data, such as when made of cholesteric liquid crystal, anti-counterfeiting imaging the medium 400 from any viewing angle, keep a database in the image data storage unit 113 the captured image data captured as the correct image data. Accordingly, correct image generation unit 109 reads the correct image data from the database in correspondence with the viewing angle of the captured image data to be compared, in association with the captured image identification information of the captured image data to be compared, authenticity judgment captured image written in the data table may be configured to store.
[0072]
　Similarity calculating unit 110 refers to the authenticity determination image data table in the image data storage unit 113, sequentially reads each of the image data identification information corresponding to the determined image data identification information and correct image data address. Then, the similarity calculation unit 110, the captured image data address corresponding to the captured image data identification information is read from the captured image data table in the image data storage unit 113. Thus, the similarity calculating unit 110 from the image data storage unit 113, reads the captured image data corresponding to the captured image data address and correct image data corresponding to the correct image data address.
[0073]
　Then, the similarity calculation unit 110, the similarity of the captured image data to the read correct image data is calculated by the template matching. Here, the similarity calculating unit 110, for example, each pixel corresponding in each of the correct image data and captured image data (if color image RGB (Red (red), Green (green), each Blue (blue) ) seeking mean square error of the luminance values ​​of, the mean square error by adding all the pixels (pixels) or keep some of the corresponding pixel, and outputs the reciprocal of the sum as numerical value indicating the degree of similarity. Therefore, the larger the numerical value of the similarity, the captured image data and the correct image data are similar. here, as the part of the corresponding pixel, with respect to other pixels in the correct image data, the observation angle pattern portion of the significantly different characteristic light is selected and used.
[0074]
　Also, the similarity calculating unit 110, all the captured image data and the correct image data pixels or converts the RGB numbers of some pixels corresponding to the appropriate color space, the square of the Euclidean distance in color space adding, or the reciprocal of the sum as configured to output a numerical value indicating the degree of similarity. Similar to the case of using the case mean square error also, the larger the numerical value of the similarity is similar to the correct image data and captured image data.
[0075]
　As described above, the similarity calculating unit 110, correct images sequentially in response to the determination image data identification information of the captured image data table for authenticity determination in the image data storage unit 113, corresponding to the captured image data and the captured image data determine the degree of similarity between the data. Then, the similarity calculation unit 110, the similarity calculated, corresponding to the captured image data identification information of the captured image data to determine the degree of similarity with respect to captured image data table for authenticity determination in the image data storage unit 113 written by and stores Te.
[0076]
　Further, when the intensity of the illumination light at the time of the captured image data does not correspond to the correct image data can not compare a simple pixel.
　Therefore, evaluation in the RGB color between a given pixel, that is, the R / G between a given pixel of the captured image data (the ratio of the gradients of the gradient and G R), given the image data by calculating the mean square error between the R / G between the pixels of the correct image data corresponding to the inter-pixel, to absorb the difference in the intensity of the illumination light, configured to calculate a numerical value indicating the accuracy of the similarity it may be. The predetermined inter-pixel, the pixel PA and pixel PB of two points leave the set, as the ratio obtained by dividing the gradient of R pixel PA in gradient of G pixels PB, determine the R / G. Moreover, not only R / G, may be used in combination B / G (the ratio of the gradients of the gradient and G B). Here, the predetermined inter-pixel, allowed to set a combination of pre-R / G and B / G becomes larger pixels.
[0077]
　Authentication judgment unit 111 reads all the determination similarity corresponding to the image data identification information authentication judgment pickup image data table in the image data storage unit 113. The authentication judgment unit 111, a similarity respectively corresponding to all of the determination image data identification information read is compared with similar preset threshold. Similar threshold, any angle and captured image data captured by (angle in later angular range), a plurality of different viewing angles similarity between correct image data obtained in response to the observation angle of the captured image data calculated, it is obtained in advance by setting the experimental value such that the value outside the similarity between correct image data and captured image data at the same observation angle for each. Different similarity thresholds for each viewing angle has been required, authentication judgment unit 111, using a similar threshold corresponding to the observation angle, it performs authenticity determination processing of the medium for preventing forgery.
[0078]
　Also, authentication judgment unit 111 obtains the similarity of the image data in the plurality from one, is less than the degree of similarity even one similar threshold, credit cards 300 to which the anti-counterfeit medium 400 is added ( determining the authenticity determination target) is false and (a counterfeit). On the other hand, authentication judgment unit 111 obtains the similarity of the image data in the plurality from one, as long as all the similarity or similarity threshold, a credit card 300 (authenticity determination anti-counterfeit medium 400 is added It determines that the subject) is the true (which is real).
[0079]
　Display unit 112 is, for example, a liquid crystal display, and displays an image on its display screen.
　Image data storage unit 113, captured image data that has already been described, correct image data, captured image data table, each of the captured image data table and the observation target shaped frame table for authenticity determination is written and stored.
[0080]
　The imaging control unit 102 performs at the time of imaging, whether the observation angle of imaging the medium for preventing forgery are in the predetermined angle range determination. Here, the angle range, in the diffraction grating or a hologram, indicates the range of angles that can be the different viewing angles, observing the different colors or optical patterns respectively. If the viewing angle in this angular range is not on, it is impossible to generate the correct image data in which the pattern of the corresponding color or light is captured with a high accuracy, it is impossible to accurately authenticity determination of the medium for preventing forgery .
　At this time, the imaging control unit 102, a viewing angle is the imaging direction of the imaging unit 101, thereby estimated for observation target shape image generation unit 105. The imaging control unit 102, viewing angle observation target shape image generation unit 105 has estimated satisfies the angle condition in the imaging process when contained in the angular range, whereas the estimated observed angle is found in the angular range not when the display to not satisfy the angular condition displaying on the display screen of the display unit 112 in the imaging process, prompts to adjust the viewing angle of the angle range for the user.
[0081]
　The imaging control unit 102 includes an imaging unit 101 at the time of imaging, it is determined whether or not satisfy an imaging condition for capturing an image data of comparable quality and correct image data. As imaging conditions, the focal length in the imaging unit 101, detects whether same as the focal distance used when you create a coordinate conversion formula. The imaging control unit 102 satisfies the imaging condition in the imaging process when the focal length that is currently set is the same as the focal distance used when you create a coordinate conversion formula, whereas the focal length that is currently set There is displayed on the display screen of the display unit 112 to display a no case satisfied imaging conditions in the imaging process that is different from the focal distance used when you create a coordinate conversion formula to adjust the focal length to the user encourage that. Also, for exposure conditions in the imaging condition may be configured to add optionally a strength of presence or illumination of the illumination.
[0082]
　The imaging control unit 102, as an imaging condition, when setting the exposure condition of the imaging unit 101 generates a luminance histogram. Imaging control unit 102, which shows the distribution of gradient of each pixel, the luminance distribution of the gradients in the captured image data in the determination of whether or not biased to high gradient side or Teikai furniture side, generated and using the histogram. For example, if the distribution of the gradients in the luminance histogram is biased to Teikai furniture side, i.e., gradient are expressed in 256 levels from "0" to "255", gradient "0" in the captured image data If neighboring pixels is large, underexposure can not be performed is compared with the correct image data generated in the captured image data. On the other hand, if the distribution of the gradients in the luminance histogram is biased to the high gradient side, that is, when the pixel of the gradation "255" near the captured image data is large, and the correct image data whiteout occurs in the captured image data It can not be carried out comparison of.
[0083]
　Therefore, as the luminance histogram distribution gradient exists in the vicinity of the center of the range of "255" from the "0", it is necessary to set the exposure condition.
　Imaging control unit 102, based on the distribution of gradation of the luminance histogram, and determines whether or not it is necessary to adjust the illumination. Imaging control unit 102 is estimated that underexposure occurs, if the adjustment of the illumination for shifting the distribution of the luminance histogram on the high gradient side necessary, forgery at the time of imaging of the illumination unit 104 with respect to the exposure control unit 103 causing illumination of prevention medium 400 performed at predetermined intensity (e.g., to irradiate the flash light to the imaging direction). The imaging control unit 102, if the authenticity determination apparatus 1 does not have the exposure control unit 103 and the illumination unit 104, that irradiates illumination of the required intensity for the user with respect to the medium for preventing forgery 400 to view the display to prompt the display screen of the display unit 112.
[0084]
　On the other hand, the imaging control unit 102 is estimated that overexposure occurs, if the adjustment of the illumination for shifting the distribution of the luminance histogram Teikai furniture side necessary, the imaging of the illumination unit 104 with respect to the exposure control unit 103 It has done so at so no or a predetermined intensity to perform the illumination of the medium for preventing forgery 400 at. The imaging control unit 102, for irradiating the illumination of the required intensity for the user with respect to the medium for preventing forgery 400, display to display a message urging the user to reduce the strength of the current anti-counterfeit medium 400 ambient lighting It is displayed on the display screen of the parts 112.
[0085]
　In the above process, to create a distribution of the luminance histogram, the exposure control table describing the control conditions such as the intensity of the exposure conditions and lighting corresponding to the distribution state, previously written to the image data storage unit 113 it may be configured. The intensity of this case, the imaging control unit 102 searches the luminance histogram similar to the pattern of the luminance histogram of the captured image data to be captured from the exposure control table in the image data storage unit 113, the exposure conditions and lighting of the captured image data to be imaged reading the information of the control conditions such as to display the control condition on the display screen of the display unit 112 as described above.
[0086]
　Further, the illuminance sensor is provided to the exposure control unit 103, the illuminance measured by the illuminance sensor, may be set the illuminance of the exposure conditions and lighting. Here, illumination and to create an exposure control table describing the control conditions such as the intensity of the exposure conditions and lighting corresponding to illuminance, may be previously written in advance configuration to the image data storage unit 113. In this case, the imaging control unit 102, corresponding to the illumination of imaging the imaged image data, searches the exposure control table in the image data storage unit 113, such as exposure conditions and intensity of the illumination of the captured image data to be imaged reading the information of the control condition, and displays the control condition on the display screen of the display unit 112 as described above.
[0087]
　Next, FIG. 13 is a flowchart showing an operation example of the processing of the authentication judgment for authenticity determination target using the medium for preventing forgery in the identification apparatus of the present embodiment. Hereinafter, the application authentication judgment will be described the operation of the identification device in after being executed by the user.
　Step S1:
　the imaging control unit 102 informs the observation target shape image display unit 106, an observation object shaped frame 100 for imaging the medium for preventing forgery 400, instructing to display on the display screen of the display unit 112.
　Thus, the observation target shape image display unit 106 reads out the observation object shaped frame 100 from the observation target shaped frame table of the image data storage unit 113.
[0088]
　Step S2:
　observation target shape image display unit 106, an observation object shaped frame 100 read out from the observation target shaped frame table of the image data storage unit 113, the display screen of the display unit 112.
　Here, when the identification device is compatible with the authenticity determination of a plurality of types of anti-counterfeit medium 400, the observation target shape image display unit 106, a plurality of types of anti-counterfeit medium 400 capable of performing authenticity determination (i.e. card type ) displayed on the display screen of the display unit 112 a list of may be configured to prompt the user to select one user. In this case, the observation target shape image display unit 106, the observation object shaped frame identification information corresponding to each type of list, display the observation object shaped frame 100 corresponding to the medium for preventing forgery 400 type selected by the user It is displayed on the display screen of the parts 112. In this case, the observation object shaped frame corresponding to a plurality of types, along with the observation object shaped frame identification information for identifying each of which is pre-written and stored in the image data storage unit 113.
[0089]
　Step S3:
　the imaging control unit 102, a captured image of the medium for preventing forgery 400 imaging unit 101 captures an image, to the display unit 112 that the observation target-shaped frame 100 is being displayed, displaying a through image 500.
[0090]
　Step S4:
　a user in the display unit 112, the outer peripheral portion of the observation target shaped frame 100 of the image observation target shape image display unit 106 displays the (segment of the image showing the outer periphery), the imaging unit 101 and imaging display the alignment of the outer peripheral portion of the through-image 500 of the medium for preventing forgery 400 to be carried out as described in FIGS. 4-6.
　Further, the shape outer circumference of a square anti-counterfeit medium 400, if the observation target-shaped frame 100 is the image of the square of the vertices (4 vertices), the user, and each vertex of the observation object shaped frame 100, forgery so as to overlap with each vertex of the through image 500 to prevent medium 400 adjusts the imaging direction and the position of the imaging unit 101.
[0091]
　Step S5:
　Then, the shape similarity calculating unit 107, and the outer peripheral portion of the image of the observed object shaped frame 100, at the outer peripheral portion of the through-image 500 of the medium for preventing forgery 400, the distance of the corresponding pixel (coordinate points) It obtains the mean square error, the mean square error as a shape error, and outputs the reciprocal of the shape errors as the shape similarity, the imaging determination unit 108.
[0092]
　Step S6:
　The imaging determination unit 108, it is determined whether the shape threshold or shape similarity is preset. At this time, the imaging determination unit 108, when the shape similarity is equal to or higher than the shape value, the processing moves to step S7. On the other hand, the imaging determination unit 108, when the shape similarity is less than the shape value, the processing moves to step S4.
[0093]
　Step S7:
　imaging determination unit 108, the shape similarity is determined that more shapes threshold, and outputs an instruction to perform imaging to the imaging control unit 102.
　Accordingly, the imaging control unit 102 receives the captured image data of the imaging target by the imaging unit 101 are captured, it is stored is written to the image data storage unit 113. The imaging control unit 102, the captured image data address indicating the address of writing captured image data, and an observation object shaped frame identification information of the observation object shaped frame corresponding to the captured image data, and applied to the captured image data together with the captured image data identification information, and stores write the captured image data table of the image data storage unit 113.
[0094]
　Step S8:
　authentication judgment unit 111, based on the similarity between the captured image data and the correct image data, performs authenticity determination of the captured image data (described in detail later).
[0095]
　Step S9:
　authentication judgment unit 111, the result of the authenticity judgment of the imaged medium for preventing forgery in the captured image data, the display unit 112.
[0096]
　Next, FIG. 14 is a flowchart showing an operation example of the processing of the authentication judgment for authenticity determination target using the medium for preventing forgery in the identification apparatus of the present embodiment. The flowchart of FIG. 14 is described in detail an example of the operation of the process of the authentication judgment in FIG.
　Step S11:
　correct image generating unit 109 refers to the captured image data table for authenticity checking, the information of the viewing angle and the observation position of the observation object shaped frame indicated by the captured image data identification information of authenticity determination target, the image data storage unit read from 113 observation target shaped frame table.
　The correct image generating unit 109, based on the viewing angle and viewing position information corresponding to the observation target shaped frame used for imaging, to generate the correct image data to be compared with the captured image data corresponding to the observation target shaped frame , the image data storage unit 113, and stores write the generated correct image data. Also, correct image generating unit 109, together with the captured image data identification information correct image data address indicating the address of writing correct image data, and stores write against authenticity judgment captured image data table of the image data storage unit 113 .
[0097]
　Step S12:
　Next, the similarity calculating unit 110, the captured image data table of the image data storage unit 113 reads the captured image data address of the captured image data to be authenticity determination.
　Also, the similarity calculating unit 110, the authentication judgment pickup image data table of the image data storage unit 113, reads the correct image data address corresponding to the captured image identification information of the captured image data to be authenticity determination.
　Then, the similarity calculation unit 110, by each of the captured image data address and correct image data address, read captured image data address, each correct image data address from the image data storage unit 113.
[0098]
　Step S13:
　Next, the similarity calculating unit 110, each of the similarity of the captured image data and the correct image data, for example, in all the pixels the mean square error of the luminance values for each pixel (or preset feature points) summed to calculate the inverse of the mean square error as the similarity.
　Then, the similarity calculation unit 110, the calculated similarity, to authenticity determination image data table of the image data storage unit 113, in correspondence to the captured image data identification information indicating the captured image data to be determined, written in for storage.

[Claim 1]
　A recognition apparatus forgery prevention medium performs authenticity determination of the appended article,
　said anti-counterfeit medium when the medium for preventing forgery was observed at the observation angle of the pattern of light can be observed as the viewing angle changes varies of the observation target shape image showing the shape, and the observation target shape frame display unit that displays the display image data is the image of the imaging target of the imaging apparatus on the display screen,
　the imaging target on the display screen and the observation target shape image the shape similarity calculation unit for calculating a shape similarity between the outer shape of the medium for preventing forgery,
　wherein the shape similarity by whether a preset shape threshold above, viewing angle and the observation position of the image pickup device an imaging determination unit that performs whether the imaging determination correct
　identification device comprising a.
[Claim 2]
　Wherein imaging the medium for preventing forgery showing the viewing angle and viewing position, the appropriate viewing angle and viewing position observed from the generating said observation target shape image showing the shape of the medium for preventing forgery observation target shape image generating unit further comprising
　identification apparatus according to claim 1.
[Claim 3]
　The captured image data to which the anti-counterfeit medium is captured, and the the correct pattern of the medium for preventing forgery compares the correct image data to determine the similarity between the captured image data and the correct image data similarity calculation unit,
　wherein depending on whether the degree of similarity exceeds a preset threshold, said anti-counterfeit medium is correct whether the authentication judgment unit, which performs authenticity determination
　identifying apparatus according to claim 1 or claim 2 further comprising .
[Claim 4]
　The authenticity determination unit,
　compares the respective captured image data captured in response to a plurality of different observation target shape image, the correct image data respectively corresponding to the observation target shape image of the captured image data, wherein performing authenticity determination by determining whether or not each of the similarity between the captured image data and the correct image data exceeds the threshold value
　identification device according to claim 3.
[Claim 5]
　The captured image data imaged, a plurality of different types of the said resolution than correct image data of the medium for preventing forgery is compared with lower candidate image data, the candidate image data extraction unit for extracting the highest similarity candidate image data further a,
　wherein the similarity calculating unit calculates the degree of similarity of the candidate image data to which the candidate image data extraction unit has extracted
　identification device according to claim 3 or claim 4.
[Claim 6]
　Comprising a notification function of notifying an image capturing direction of said anti-counterfeit medium corresponding to the observation target shape image
　identification apparatus according to any one of claims 1 to 5.
[Claim 7]
　A discrimination method for forgery prevention medium performs authenticity determination of the appended article,
　the observation target shape frame display unit, the medium for preventing forgery pattern of light changes can be observed as the viewing angle changes with the viewing angle the observation target shape image showing the shape of the medium for preventing forgery when observed, displaying the display image data is a captured subject image of image capturing apparatus on the display screen,
　the shape similarity calculation unit, the observation target shape image wherein calculating the shape similarity between the outer shape of the medium for preventing forgery of the imaging target on the display screen, an
　imaging determining unit, said shape similarity by whether a preset shape threshold value or more, the image captured viewing angle and viewing position do the right whether imaging determination device
　identification methods.
[8.]
　The observation target shape image showing the medium for preventing forgery pattern of light viewing angle is observed to vary to change the shape of the medium for preventing forgery when observed with the viewing angle, is the imaging target image of the imaging apparatus display display image data on the display screen,
　the viewing calculates the shape similarity between the outer shape of the medium for preventing forgery of the imaging target in the target shape image and the display screen,
　the shape threshold said shape similarity is set in advance by whether an either less than, the angle of observation and the observation position of the image capturing apparatus performs the correct whether imaging determination,
　operating a computer as the medium for preventing forgery performs authenticity determination method of the attached article causes, identification program.
[Claim 9]
　The observation target shape image showing the medium for preventing forgery pattern of light viewing angle is observed to vary to change the shape of the medium for preventing forgery when observed with the viewing angle, is the imaging target image of the imaging apparatus display display image data on the display screen,
　the viewing calculates the shape similarity between the outer shape of the medium for preventing forgery of the imaging target in the target shape image and the display screen,
　the shape threshold said shape similarity is set in advance by whether an either less than, the angle of observation and the observation position of the image capturing apparatus performs the correct whether imaging determination,
　operating a computer as the medium for preventing forgery performs authenticity determination method of the attached article let includes an identification program, computer-readable media.