关键词: 虹膜识别, 多通道, 小波变换, 纹理分析, 特征提取

Abstract: Iris recognition algorithms based on wavelet transform zero-crossing are sensitive to the grey variation of the iris image texture.A new iris recognition algorithm based on Daubechies-4 wavelet is presented using the multiple channel characteristic of wavelets.After dividing iris into ten strips according to its texture distributing，each strip adopts an appropriate scale wavelet used to filter each strip.The feature value is denoted by the mean and standard deviation of every channel’s coefficients of wavelet transform，and 128 feature values can be ascertained for every iris.Then the weighed Euclid distance is used to match two iris codes.Tests show that presented method which is translation，rotation，and scaling invariant is effective and achieves a high recognition rate.

Key words: iris recognition, multiple channels, wavelet transform, texture analysis, feature extraction