Collating device

A collating device comprising:

• a collation list configured to retain a registered image feature amount, a threshold value serving as a criterion for determining whether to perform alarm activation, and a false alarm person image feature amount of a person who is not to be alarmed and who was previously erroneously alarmed due to having been mistaken for another person who is to be alarmed;
• a collator configured to collate an input image with the registered image feature amount and the false alarm person image feature amount retained by the collation list, such that the collator obtains a similarity between the input image with the one of the registered image feature amount and the false alarm person image feature amount;
• and
• a comparator configured to compare:
• a larger one of a value of the obtained similarity between the input image and the false alarm person image feature amount, and the threshold value;
• and
• the similarity between the input image and the obtained registered image feature amount, such that the comparator determines whether to perform the alarm activation.

A collation method comprising:

• providing a collation list retaining a false alarm list comprising a registered image, a threshold value serving as a criterion for determining whether to perform alarm activation, and a false alarm person image of a person who is not to be alarmed and who was previously erroneously alarmed due to having been mistaken for another person who is to be alarmed;
• collating an input image with at least one of the registered image and the false alarm person image managed by the collation list, and obtaining a similarity therebetween;
• and
• comparing:
• a larger one of a value of the obtained similarity between the input image and the false alarm person image and the threshold value;
• and
• the obtained similarity between the input image and the registered image;
• and
• determining, based on said comparing, whether to perform the alarm activation.