Detection and localization are important processes in the effort to segment the iris. In this paper, we present the method for iris detection and localization using Contrast Shrinking and Stretching (CSS). This method was applied to the image in the CIELab color model. From the CIELab color model, the L* channel was used for iris detection, and b* channel was used for pupil detection. This method is very suitable applied to the color eye image. Based on the measurement, the accuracy is 95.31%.

Keywords—iris detection; iris localization; CIELab color; contrast shrinking; contrast stretching