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This paper presents a new approach for personal authentication using a lossless watermarking technique based on hand images features. The proposed method attempts to embed personal message to the hand image, which will not destroy the original hand images and can improve the recognition rate and the recognition speed of palmprint-based verification system. We could extract the watermark from the hand...
This paper proposes a watermarking technique based on image features. Four subimages are obtained from the host image by using subsampling. Wavelet transform is applied to the subimages. A key will be formed by comparing the DWT mid-frequency coefficients of the subimages. In contrast to conventional approaches, our method can strengthen the fidelity of images through considering local image characteristics,...
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