Algorithms for The Detection of the Pupil and the Iris of The Human Eye

In this work we present efficient algorithms for the detection, extraction, and expansion of the iris of the human eye. The method depends on several image processing techniques, such as thresholding, edge detection, Hough transform, and geometrical transformations. The complexity of the detection of the center have been reduced from O(N 3) to O(N). Several experiments on the infrared iris of the CASIA database showed the robust extraction of the iris. The obtained results are the same as the one that uses Hough transform for all the stages of the detection of the iris center, inner and outer radii. Key Words: Iris recognition, biometric security, CASIA, iris expansion, Hough transforms. 1