计算机科学 ›› 2021, Vol. 48 ›› Issue (6A): 57-62.doi: 10.11896/jsjkx.200900218
周俊1,2, 王帅3, 刘凡漪4
ZHOU Jun1,2, WANG Shuai3, LIU Fan-yi4
摘要: 虹膜特征提取是虹膜识别中的关键环节。小波方法在提取虹膜特征时未对分解后的高频空间进一步细化分解,而虹膜纹理特征较多地蕴含在高频空间中,因此提取的虹膜特征在表示特征能力上存在不足。针对此类问题,提出一种基于小波包多尺度分解的虹膜识别方法,利用阈值将小波包分解后第二层对角高频子带图调制为虹膜特征码,利用海明距离对特征进行识别。对108类人眼虹膜图像进行特征提取与匹配,分解小波采用sym2小波,共进行5 350次特征匹配,正确识别率达到98.5%,在识别性能上优于Boles的小波变换过零点法和Lim的二维Haar小波变换法,仅次于Daugman的二维Gabor方法。
中图分类号:
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