Information processing device, visual line detection system, visual line detection method, and visual line detection program

A visual line detection system, comprising:

• a light source that irradiates first and second eyes of a user with light;
• an event driven vision sensor including a sensor that generates an event signal when detecting a change in intensity of a light to be incident thereon;
• and
• information processing device including circuitry configured to
• change an intensity of light of the light source;
• receive, from the event driven vision sensor, the event signal indicating a position and a time of the change in intensity of the light reflected in first and second regions of the first eye and in third and fourth regions of the second eye of the user;
• and
• identify the light source corresponding to the event signal based on the event signal and positions of the eyes of the user, the light source, and the vision sensor;
• and
• detect a visual line of the user according to the identified light source, wherein
• the first and second regions are adjacent to a pupil of the first eye and the third and fourth regions are adjacent to a pupil of the second eye,
• the first region is at an outer corner side of the pupil of the first eye,
• the second region is at an inner corner side of the pupil of the first eye,
• the third region is at an inner corner side of the pupil of the second eye, and
• the fourth region is at an outer corner side of the pupil of the second eye.

A visual line detection method, comprising:

• changing an intensity of light of a light source that irradiates first and second eyes of a user with light;
• receiving, from an event driven vision sensor including a sensor that generates an event signal when detecting a change in intensity of a light to be incident thereon, the event signal indicating a position and a time of the change in intensity of the light reflected in first and second regions of the first eye and in third and fourth regions of the second eye of the user;
• identifying the light source corresponding to the event signal based on the event signal and positions of the eyes of the user, the light source, and the vision sensor;
• and
• detecting a visual line of the user according to the identified light source, wherein
• the first and second regions are adjacent to a pupil of the first eye and the third and fourth regions are adjacent to a pupil of the second eye,
• the first region is at an outer corner side of the pupil of the first eye,
• the second region is at an inner corner side of the pupil of the first eye,
• the third region is at an inner corner side of the pupil of the second eye, and
• the fourth region is at an outer corner side of the pupil of the second eye.

A non-transitory computer readable medium storing computer executable instructions which, when executed by a computer, cause the computer to:

• change intensity of light of a light source that irradiates first and second eyes of a user with light;
• receive, from an event driven vision sensor including a sensor that generates an event signal when detecting a change in intensity of a light to be incident thereon, the event signal indicating a position and a time of the change in intensity of the light reflected in first and second regions of the first eye and in third and fourth regions of the second eye of the user;
• and
• identify the light source corresponding to the event signal on a basis of a relative positional relation among the eyes of the user, the light source, and the vision sensor, and of the event signal generated at a same time that the intensity of the light of the light source is changed, to detect a visual line of the user, wherein
• the first and second regions are adjacent to a pupil of the first eye and the third and fourth regions are adjacent to a pupil of the second eye,
• the first region is at an outer corner side of the pupil of the first eye,
• the second region is at an inner corner side of the pupil of the first eye,
• the third region is at an inner corner side of the pupil of the second eye, and
• the fourth region is at an outer corner side of the pupil of the second eye.