Identification device, identification method, and computer-readable medium including identification program

An identification method for performing authenticity determination on an article with an anti-counterfeit medium attached, the identification method comprising:

• displaying, on a display screen using at least one controller, an observation object shape image indicating a shape of the anti-counterfeit medium to be observed at an observation angle, and displaying an image of the anti-counterfeit medium serving as an imaging object of an image-capturing device, the anti-counterfeit medium being designed such that an observed pattern of light from the anti-counterfeit medium varies as the observation angle varies;
• calculating, using the at least one controller, a shape similarity based on a template matching between the observation object shape image and image of the anti-counterfeit medium serving as the imaging object on the display screen;
• and
• performing, using the at least one controller, imaging determination as to whether or not the displayed outer shape of the anti-counterfeit medium corresponds to the observation angle and an observation position of the image-capturing device are correct based on whether the shape similarity is equal to or greater than a preset shape similarity threshold.

A computer-readable non-transitory storage medium comprising an identification program that causes a computer to execute an authenticity determination method for an article with an anti-counterfeit medium attached, the authenticity determination method comprising:

• displaying, on a display screen, an observation object shape image indicating a shape of the anti-counterfeit medium to be observed at an observation angle, and displaying an image of the anti-counterfeit medium serving as an imaging object of an image-capturing device, the anti-counterfeit medium being designed such that an observed pattern of light from the anti-counterfeit medium varies as the observation angle varies;
• calculating a shape similarity based on a template matching between the observation object shape image and the image of the anti-counterfeit medium serving as the imaging object on the display screen;
• and
• performing imaging determination as to whether or not the anti-counterfeit medium corresponds to the observation angle and an observation position of the image-capturing device based on whether or not the shape similarity is less than a preset shape similarity threshold.