Fast Iris Boundary Location Based on Window Mapping Method

In recent years, iris recognition has become a hot research topic because it shows outstanding recognition accuracy. Iris boundary location is an essential part in iris recognition because it defines the effective image region used for feature extraction. A novel iris boundary location method based on window mapping is presented in this paper: First, it searches the pupil center by window mapping, and then locates the inter boundary of iris. Finally, a fast and precise refinement of the outer boundary of iris is carried out based on an improved Hough transform method. Compared with conventional methods, this novel method shows faster and robust properties in locating the iris boundaries.