Hough transform is a common algorithm used to detect geometry shape of objects in computer Image processing, some points saMed lines, circles and other C I I N~S will be detected easily by using Hough transform in image. In iris refognition system, both the inner boundsry and the outer boundary of a typical iris can approximately be taken as circles, sn the two circles of iris CM be obtained by using Hough hnnsform. In this paper, Hough transform algorithm is introduced and is adopted in iris mentation. A modifled fas! algorithm is presented to solving low speed of Hough transform. Simulati~n~ and research Results show that Hough transforms is satisfied in iris segmentation.
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