METHOD OF MEASURING PUPIL CENTER POSITION AND METHOD OF DETECTING VIEW POINT POSITION

摘要

PROBLEM TO BE SOLVED: To estimate an accurate pupil center position even if noise components such as the luminescent point of infrared ray LED used in lighting and the shadow of an eyebrow are mixed near the pupil center giving the pupillary diameter. SOLUTION: The outline of the pupil is detected from a pupil image 33 imaged in an eyeball 30 by an infrared ray CCD camera 22, the distribution of the center coordinate group obtained by detecting several times a center coordinate (38) of a circle determined from several outline points 34 arbitrarily set on an outline is separated into a center portion and an outer edge portion, the weight coordinate of the center coordinate group comprising the center portion is taken as a pupil center position 39 and the detection of the outline points 34 is performed by black-and-white binarizing the video signal of the pupil image 33 and detecting the black-and-white reverse position (34) of the video signal.