Title:	EYE CENTRE LOCATION WITH HOUGH TRANSFORM
Author(s):	Ivan A. Matveev
ISBN:	978-972-8939-48-9
Editors:	Yingcai Xiao
Year:	2011
Edition:	Single
Keywords:	Iris segmentation, image processing, Hough transform
Type:	Short Paper
First Page:	313
Last Page:	318
Language:	English
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Paper Abstract:	An algorithm of locating approximate eye center in image is presented. It is based on Hough approach and exploits the fact that brightness anti-gradient vectors at the circular borders of pupil and iris are all targeted to the circle's centers. Pixels with high brightness gradient value are selected in image as possible border points. In each of these pixels voting to Hough accumulator is performed with a segment in the direction of brightness anti-gradient. Position of maxima of the accumulator is considered as an eye center. Tests were performed for more than 95000 images of public domain iris databases.
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