An Improved Iris Location Algorithm Based on Sampling to Special Regions of Interesting(ROI)
Wenda Peng · ACTA PHOTONICA SINICA · 2008
According to the characteristics of the iris image,a new algorithm,which takes the center of the pupil as a reference point to sample the special region of interest(ROI)of iris image is proposed.This algorithm also designs the radius parameters of Hough transform based on the physiological character of iris,and it chooses the best matching result that was achieved from Hough transform,for the inner and outer circles of an iris are approximately concentric.This algorithm is helpful to avoid the interference of eyelid and eyelash and reduce the calculation of Hough transform remarkably.The 108 groups iris location test by using the images of CASIA was finished.The result shows that the average location time is 0.83 s,and the location accuracy rate is as high as 98.9%.