The monitoring system according to claim 1, wherein the output means of the monitoring device further outputs information indicating that, when the position information satisfies a criterion.
[Claim 18]
　In the monitoring system according to any one of claims 10 to 17,
The monitoring device
a receiving means for presenting the detected face image of the person who is not the person to be watched over, allowing the operator to select whether or not to register the face image, and receiving input from the operator;
A monitoring system comprising registration means for registering the face image of the person whose registration of the face image is accepted.
[Claim 19]
"The monitoring device
Associate the feature value of the person to be watched over and store it in the feature value storage means,
By processing the captured image using the feature amount, it is detected that the person who is not the person to be watched over has approached the person to be watched over within a reference distance,
A monitoring method that outputs a predetermined output using the detected result.
[Claim 20]
In the monitoring method according to claim 19,
the monitoring device
Associate the feature values of people who belong to the same group as the watching target and store them in the feature value storage means,
A monitoring method for detecting that a person who does not belong to the same group has approached a person who belongs to the same group within a reference distance by processing a captured image using the feature amount.
[Claim 21]
In the monitoring method according to claim 19 or 20,
the monitoring device
A monitoring method in which the predetermined output is performed when the person not being watched over approaches the person being watched over within a reference distance for a reference time or longer.
[Claim 22]
　In the monitoring method according to any one of claims 19 to 21,
the monitoring device
　Further determine whether the person who has approached the person to be watched over within the reference distance is included in the predetermined list,
A monitoring method further outputting information to that effect when it is determined that the approaching person is included in the predetermined list.
[Claim 23]
In the monitoring method according to claim 23,
A monitoring method in which the predetermined list is created for each group or for each individual.
[Claim 24]
　In the monitoring method according to any one of claims 19 to 23,
the monitoring device
A monitoring method in which the above processing is performed on an image captured by a specific camera among multiple cameras.
[Claim 25]
　In the monitoring method according to any one of claims 19 to 24,
the monitoring device
Further acquire the location information of the person to be watched over,
A monitoring method that executes the above process when the location information satisfies the criteria.
[Claim 26]
In the monitoring method according to claim 25,
the monitoring device
A monitoring method that further outputs information to that effect when the location information satisfies a criterion.
[Claim 27]
　In the monitoring method according to any one of claims 19 to 26,
the monitoring device
Present the detected face image of the person who is not the person to be watched over, let the operator select whether to register the face image, accept the operator's input,
A monitoring method for registering the face image of the person whose registration of the face image is accepted.
[Claim 28]
on the computer,
A procedure for associating the feature values of the person being watched over and storing them in the feature value storage means,
A procedure for detecting that the person who is not the person to be watched over has approached the person to be watched over within a reference distance by processing the captured image using the feature amount,
　A procedure for performing a predetermined output using the detection result of the detection procedure,
program to run the
[Claim 29]
In the program according to claim 28,
A procedure for associating the feature values of people belonging to the same group as the watching target and storing them in the feature value storage means,
A program for causing a computer to execute a procedure for detecting that a person who does not belong to the same group has approached a person who belongs to the same group within a reference distance by processing the captured image using the feature amount. .
[Claim 30]
In the program according to claim 28 or 29,
A program for causing a computer to execute the procedure for performing the predetermined output when the person who is not the person to be watched over approaches the person to be watched over within a reference distance for a reference time or longer.
[Claim 31]
　In the program according to any one of claims 28 to 30,
A procedure for further determining whether a person who has approached the person to be watched over within the reference distance is included in a predetermined list,
A program for causing a computer to execute a procedure for further outputting information to that effect when it is determined that the approaching person is included in the predetermined list.
[Claim 32]
In the program according to claim 31,
A program in which the predetermined list is created for each group or for each individual.
[Claim 33]
　In the program according to any one of claims 28 to 32,
A program for causing a computer to execute the procedure for executing the above processing on an image captured by a specific camera among multiple cameras.
[Claim 34]
　In the program according to any one of claims 28 to 33,
　Procedures for further acquiring the location information of the person to be watched over,
A program for causing a computer to execute the procedure for executing the above processing when the location information satisfies the criteria.
[Claim 35]
In the program according to claim 34,
A program for causing a computer to execute a procedure for further outputting information to that effect when the location information satisfies the criteria.
[Claim 36]
　In the program according to any one of claims 28 to 35,
A procedure for presenting the detected face image of the person who is not the person to be watched over, allowing the operator to select whether or not to register the face image, and accepting input from the operator,
A program for causing a computer to execute a procedure for registering the face image of the person whose face image registration has been accepted.