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基于几何特征的虹膜定位算法

DOI: 10.11834/jig.200306230

Keywords: 医学影像学(320?1140),虹膜定位,虹膜鉴别,圆检测,霍夫变换

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Abstract:

提出了利用虹膜边缘图象的几何特征以及圆相交弦的性质进行虹膜定位算法.首先根据虹膜图象的整体灰度分布信息,利用边缘检测算子提取虹膜的内边缘图象,然后利用圆的相交弦性质以及投票策略提取虹膜的中心,最后利用Hough变换的半径直方图投票策略提取虹膜内外径.通过仿真实验的对比结果表明,该算法提高了虹膜定位的速度,同时对噪声具有一定的鲁棒性

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