Based on the Texture of a New Edge Detection Algorithm of Iris Location
Yonglong Yan · Computer Knowledge and Technology · 2008
For the purpose of localizing iris precisely and quickly not in a old way, a new and direct iris extraction algorithm beyond iris outer edge detection is presented. Firstly, threshold segmentation using gray projection is applied to locate the pupil. Then it enhances the iris edge image to extract the edge information and gain the edge image. After that, by scanning the gray projection of a horizontal line crossing the pupil, gain a rough radius as a base data , scanning analysing the outer circles with a bigger radius until the precise radius that contains iris pattern is received. Experimental results show that this algorithm shows a nice localizing result and improves the speed both in iris extraction and the following recognition in total as well.