Automatic eye feature extraction based on Hough transform and eyelid deformable template

This paper proposes an automatic eye feature extraction method based on Hou gh transform and eyelid deformable template. It could locate the iris cente r and the contour of the eye automatically and correctly. Compared with oth er similar deformable template methods, this approach has the following adv antages: It could be used to process those low contrast images in which the lower eyelid is blur. It could extract accurate feature. It simplifies the difficulty in selecting empirical coefficients by this improved energy fun ctions and conservative energy descent algorithm (CEDA). Its efficiency and superiority are clarified by experimenting on about one hundred eye images .