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In this paper, we consider the problem of extracting the embedded watermark from the printed and scanned watermarked images. Since in a practical situation, the parameters settings in the printing and scanning processes between users are different, recovering the embedded watermark from the watermarked paper, after being scanned back to the computer, is difficult and contains high amount of errors...
A digital watermarking for color image based on the modification of image pixels is considered in this paper. Its performance is analyzed and the weaknesses in the watermark embedding and extraction processes are addressed. Based on our analysis, two methods are proposed to improve the watermark embedding and extraction performance. First, the watermark signal is embedded in the chrominance channel...
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