曲线拟合的虹膜定位算法研究

来源 :电子科技大学学报 | 被引量 : 0次 | 上传用户:duyalengp
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虹膜定位是在虹膜图像中找到虹膜的内外边界,它是虹膜识别中的重要环节.该文提出了一种根据曲线拟合来进行虹膜快速定位的新方法,即先对图像进行分块并提取包含瞳孔的子图像块;再结合类间方差法提取瞳孔的二值化阈值,确定虹膜内边界点;然后根据关键的感兴趣区域灰度梯度信息确定虹膜外边界点;最后对内外边界点采用最小二乘法原理来进行曲线拟合,从而确定虹膜内外边界.通过实验表明该文提出的算法能快速准确地定位虹膜内外边界.
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