Patent ID: 11890057
Assignee: JVCKENWOOD CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC A  G | IPC A  G

Claim 4:
5. A gaze detection method comprising:
applying detection light to at least one of eyeballs of a subject;
acquiring image data on the eyeball to which the detection light is applied;
detecting, from the acquired image data, positional data of a pupil center representing a center of a pupil of the eyeball to which the detection light is applied and positional data of a corneal reflection center representing a center of corneal reflection;
calculating, based on a position of the pupil center and a position of the corneal reflection center, positional data of a point of regard of the subject on a plane containing a display screen; and
performing a calibration operation including displaying a target image in multiple positions on the display screen sequentially, setting, in the display screen, corresponding areas corresponding to the target images displayed on the display screen sequentially, and calculating positional data of the points of regard in display periods in which the respective target images are displayed; determining, with respect to each of the target images, whether the positional data of the point of regard that is calculated in the calibration operation is present within the corresponding area; when the number of valid target images that are the target images on each of which it is determined that the positional data of the point of regard is present within the corresponding area is at or above a threshold, outputting the positional data of the points of regard of the valid target images as calibration data; and, when the number of the valid target images is under the threshold, causing the calibration operation to be repeated.