Information processing device, information processing program, and information processing method

A non-transitory computer-readable medium including instructions to be performed on a processor, for directing a computer to, during playback of a video comprising a plurality of image frames:

• detect multiple first body part points, wherein each first body part point is associated with a body part in a first person image contained in a first one of the plurality of image frames, and wherein at least one first body part point is on a neck in the first person image;
• detect multiple second body part points, wherein each second body part point is associated with a body part in a second person image contained in a second one of the plurality of image frames;
• and
• determine identicality between the first person image and second person image by
• for each of the multiple first body part points, comparing color information of pixels corresponding to the first body part point to color information of pixels of a corresponding one of the multiple second body part points to determine a color similarity value,
• for at least one of the multiple first body part points, compare a position of the at least one first body part point to a position of the corresponding one of the multiple second body part points to determine a positional likelihood value,
• generate a total likelihood value based on the color similarity values and the positional likelihood value, and
• determine whether or not the first person image and the second person image represent a same person based on the total likelihood value.

A computer-implemented information processing method, comprising, during playback of a video comprising a plurality of image frames:

• detecting multiple first body part points, wherein each first body part point is associated with a body part in a first person image contained in a first one of the plurality of image frames, and wherein at least one first body part point is on a neck in the first person image;
• detecting multiple second body part points, wherein each second body part point is associated with a body part in a second person image contained in a second one of the plurality of image frames;
• and
• determining identicality between the first person image and second person image by
• for each of the multiple first body part points, comparing color information of pixels corresponding to the first body part point to color information of pixels of a corresponding one of the multiple second body part points to determine a color similarity value,
• for at least one of the multiple first body part points, compare a position of the at least one first body part point to a position of the corresponding one of the multiple second body part points to determine a positional likelihood value,
• generate a total likelihood value based on the color similarity values and the positional likelihood value, and
• determine whether or not the first person image and the second person image represent a same person based on the total likelihood value.