Line-of-sight detection device

A line-of-sight detection device comprising:

• an image acquisition unit that obtains a plurality of eye images including eyes of a subject;
• a light source that is disposed near the image acquisition unit and irradiates the subject with light for causing corneal reflection in the eye;
• and
• an image processing unit that acquires information on a pupil shape of the eye, a position (PS) of a pupil center and a position (GS) of corneal reflection included in the plurality of eye images using the plurality of eye images, and obtains a line of sight of the subject based on an acquired information,
• wherein the image processing unit includes
• a first optical axis acquisition unit that acquires a first optical axis candidate using the position (PS) of the pupil center and the position (GS) of the corneal reflection;
• a second optical axis acquisition unit that acquires a second optical axis candidate by using the pupil shape;
• an optical axis information acquisition unit that generates information for acquiring an optical axis using at least one of the first optical axis candidate and the second optical axis candidate on the basis of the pupil shape;
• a calibration information unit that provides calibration information indicating a deviation of the optical axis with respect to a visual axis of the eye;
• and
• a visual axis acquisition unit that obtains the visual axis as the line of sight by calibrating the optical axis using the calibration information.