Interest determination apparatus, interest determination system, interest determination method, and non-transitory computer readable medium storing program

An interest determination method comprising:

• acquiring an image obtained by capturing at least eyes of a target person;
• specifying an object in a line-of-sight direction of the target person using the image;
• calculating an incident light amount representing an amount of light incident on the eyes of the target person using the image;
• determining a reference pupil size based on the incident light amount;
• calculating a pupil size of the target person using the image;
• and
• determining an interest of the target person in the object by comparing the reference pupil size with the pupil size.

A non-transitory computer readable medium storing a program causing a computer to execute:

• acquiring an image obtained by capturing at least eyes of a target person;
• specifying an object in a line-of-sight direction of the target person using the image;
• calculating an incident light amount representing an amount of light incident on the eyes of the target person using the image;
• determining a reference pupil size based on the incident light amount;
• calculating a pupil size of the target person using the image;
• and
• determining an interest of the target person in the object by comparing the reference pupil size with the pupil size.