Patent ID: 8678589
Filing Date: 2014-03-25
Classification: A61B,G06K

Abstract:
1. A gaze target determination device, comprising: a display unit configured to display simultaneously a plurality of objects on a screen, the displayed objects including one target object at which a user is gazing; an event setting unit configured to generate a display event for each of the displayed objects at different times, the display event triggering a movement of a gaze direction of the user gazing at the displayed object, and indicating at least one of a movement and a change of at least part of the displayed object; a gaze direction detection unit configured to detect the gaze direction of the user; a gaze trajectory calculation unit configured to calculate a gaze trajectory that is time series data of the gaze direction, based on the gaze direction detected by the gaze direction detection unit; an eye movement event detection unit configured to detect an event detection time that is a time at which the gaze direction moves according to the display event, based on the gaze trajectory calculated by the gaze trajectory calculation unit; a synchronization structure analysis unit configured to calculate, for each of the displayed objects, a time difference between the event detection time detected by the eye movement event detection unit and an event occurrence time that is a time at which the display event is generated by the event setting unit; and a gaze target determination unit configured to determine the target object at which the user is gazing from among the displayed objects displayed simultaneously on the screen by the display unit, based on the time difference calculated by the synchronization structure analysis unit.