In order to reduce storage space for saving iris feature and extract features efficiently for the iris texture,a correlation-based 2-D nonseparable B-spline wavelet transform approach is proposed for iris recognition.The proposed iris recognition algorithm extracts wavelet coefficients features from the normalized iris images by 2-D nonseparable B-spline wavelet transform,divides these features into square feature blocks equally,sorts the feature blocks in descending order,and preserves the feature blocks w...