Patent attributes
A display apparatus including: light source(s); camera(s); and processor(s) configured to: display extended-reality image for presentation to user, whilst capturing eye image(s) of user's eyes; analyse eye image(s) to detect eye features; employ existing calibration model to determine gaze directions of user's eyes; determine gaze location of user; identify three-dimensional bounding box at gaze location within extended-reality environment, based on position and optical depth of gaze location; identify inlying pixels of extended-reality image lying within three-dimensional bounding box, based on optical depths of pixels in extended-reality image; compute probability of user focussing on given inlying pixel and generate probability distribution of probabilities computed for inlying pixels; identify at least one inlying pixel calibration target, based on probability distribution; and map position of calibration target to eye features, to update existing calibration model to generate new calibration model.
