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In this paper, a novel blind digital image watermarking scheme in contour let domain with singular value decomposition is proposed. In contrast to traditional methods where the watermark bits are embedded directly on the contourlet transform coefficients, the proposed scheme is based on watermark bits embedding on the singular value of the selected blocks within lowpass subband of the original gray...
In this paper, the authors propose a novel image watermarking scheme based on contourlet transform and singular value decomposition. We embed watermark bits in singular value vectors of the embedded blocks within lowpass subband in contourlet transform. We further adaptively apply quantization index modulation for embedding watermark according to energy distribution and human visual masking to achieve...
In this paper, we propose a novel hybrid DWT-DCT transform watermarking scheme. The original visually meaningful binary watermark image is preprocessed by using extended Arnold transform.The secret watermark bits are embedded on the singular values of the blocks within low frequency subband in host image hybrid DWT-DCT transform. To embed watermark imperceptibly,robustly and securely, we model the...
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