The research on collarette contour extraction and iris map overlap is of great importance to computer-aided iridiagnosis technologies.
卷缩轮的提取及虹膜映射图的自动覆盖的研究，对计算机辅助虹膜诊断技术具有重要意义。
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To solve the problems of collarette extraction in the computer-aided iridology system, a method for collarette extraction based on the max sum of gray gradient is proposed.