标题：Iris boundary localization based on improve hough transform
作者：Zhang, Guo Yu ;Zhao, Hui ;Han, Min ;Chen, Li Ling
作者机构：[Zhang, Guo Yu ;Zhao, Hui ;Han, Min ;Chen, Li Ling ] The School of Information Science and Engineering, Shandong University, Jinan 250100, China
会议名称：2nd International Conference on Opto-Electronics Engineering and Materials Research, OEMR 2013
会议日期：19 October 2013 through 20 October 2013
来源：Advanced Materials Research
关键词：Effective area; Hough transform; Iris localization; Pretreatment
摘要：Iris location is one of the key steps of iris recognition system. Non-ideal iris image has some problems, such as eyelid and eyelash occlusion, low contrast of iris and sclera, uneven illumination, and so on. Because of that, it's difficult to identify the boundary, especially the exterior boundary. Therefore, this paper proposes a method based on the improved Hough Transform. First, use the minimum method to find the datum point in the pupil, after that identify the valid area of the interior boundary base on that point. Apply the improved Hough Transform to that valid area to identify the interior boundary of the iris image. Then regard the center of the interior circle as our new datum point, use the same method to identify the exterior boundary. Experiment results show that our algorithm has higher accuracy than traditional method on the non-ideal iris image segmentation. © (2013) Trans Tech Publications, Switzerland.