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- W2146121550 abstract "Two simple watermarking techniques for a digital image are proposed. The methods employ a codebook in vector quantisation, and can extract watermark information from a watermarked image without an original image. Simulation results show that when the codebook of a larger size is used, a reconstructed image with a watermark has better quality than that without a watermark, and, for one of the proposed methods, a watermark size and the percentage of 0 bit contained in a watermark have almost no effect on PSNR for a reconstructed image." @default.
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- W2146121550 date "2003-01-01" @default.
- W2146121550 modified "2023-09-27" @default.
- W2146121550 title "Digital image watermarking employing codebook in vector quantisation" @default.
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- W2146121550 doi "https://doi.org/10.1049/el:20030553" @default.
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