Komwit Surachat

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This paper proposes a method used to improve the retrieval performance of the digital watermarking based on the modification of image pixels. By embedding the watermark in the chrominance channel and using the mean filter with 3×3 window size in the watermark extraction process, the accuracy of the extracted watermark can be improved. Sets of(More)
A method for improving the watermark extraction performance of the digital watermarking based on the modification of image pixels is proposed in this paper. By embedding the watermark in the chrominance channel and using the Weiner filter with 3x3 window size in the watermark extraction process, the accuracy of the extracted watermark can be improved. Sets(More)
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(More)
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