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Based on the Retinex method and the SIFT feature analysis, this paper presents a novel algorithm for hand vein recognition. First of all, the principle of the near-infrared hand vein image acquisition is introduced. Secondly, the Retinex method is used to normalize hand vein images, and the adaptive smoothing method is selected to estimate the illumination. Then gray cosine transform is used to enhance...
Based on gray scale vertical integral projection and wavelet decomposition, this paper presents a novel algorithm for hand vein feature extraction and recognition. Firstly, we design a hand vein image acquisition device, and Retinex method is used to enhance the image. Secondly, we analyze the performance of the four wavelet decomposion sub-band images and think that the low frequency sub-band image...
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