Iris Segmentation Based on Matting  

作　　者：CHEN Qiru WANG Qi SUN Ting WANG Ziyuan 

机构地区：[1]Northeastern University,No.3-11,Wenhua Road,Heping District,Shenyang,China [2]Tencent,Tencent Binhai Building,No.33,Haitian Second Road,Nanshan District,Shenzhen,China

出　　处：《Instrumentation》2022年第1期12-22,共11页仪器仪表学报（英文版）

摘　　要：In this paper,we aim to propose a novel and effective iris segmentation method that is robust to uneven light intensity and different kinds of noises such as occlusion by light spots,eyelashes,eyelids,specta-cle-frame,etc.Unlike previous methods,the proposed method makes full use of gray intensities of the iris image.Inspired by the matting algorithm,a premier assumption is made that the foreground and background images of the iris image are both locally smooth.According to the RST algorithm,trimaps are built to provide priori in-formation.Under the assumption and priori,the optimal alpha matte can be obtained by least square loss function.A series of effective post processing methods are applied to the alpha image to obtain a more precise iris seg-mentation.The experiment on CASIA-iris-thousand database shows that the proposed method achieves a much better performance than conventional methods.Our experimental results achieve 20.5%and 26.4%,more than the well-known integro-differential operator and edge detection combined with Hough transform on iris seg-mentation rate respectively.The stability and validity of the proposed method is further demonstrated through the complementary experiments on the challenging iris images.

关 键 词：Iris Segmentation Trimap Image Processing 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]