Abstract: In order to improve the speed and the precision of iris location, iris location algorithm based on ant colony and Hough transform was proposed. In the algorithm,the ants search iris edge by the gradient information of iris edge. And then, the boundary-points of iris are gotten according to the constantly increasing pheromone on the path which ants passed through. At last, we can locate the iris in the original image by Otsu threshold and Hough Transform method.The results of experiments show that the proposed algorithm can locate iris accurately and quickly.

Key words: Ant colony algorithm, Hough transform, Iris location