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- W2370327604 abstract "For embedding in the cover image are mostly binary watermarking algorithms based on DCT, the capacity of traditional methods which select one pair of middle capacity frequency coefficients to embed one bit watermark is limited. In order to increase the safety of cover images, this paper proposes a novel high capacity binary image watermarking algorithm based on DCT. Firstly, the binary watermark is preprocessed to enhance the security by Arnold scrambling. Secondly, the paper appliesblock DCT to the selected cover image, then adopts four middle frequency coefficients to reorder and makes full use of differences among the above coefficients to embed watermarks. If the watermark bit to be embedded is 0, so that by changing the coefficient value to make differences are greater than or equal to the threshold value A, and if the watermark bit to be embedded is 1, so that by changing the coefficient value to make differences are equal to the threshold value B. Finally, three binary watermark bits are embedded in each block by changing four middle frequency coefficients, and watermark embedding capacity is much better than traditional methods. The simulation experiments show that the method achieve embedding and extraction of the large capacity watermark and has strong robustness to cutting, image adding noise, JPEG compression, and other attacks." @default.
- W2370327604 created "2016-06-24" @default.
- W2370327604 creator A5031642520 @default.
- W2370327604 date "2014-01-01" @default.
- W2370327604 modified "2023-09-23" @default.
- W2370327604 title "A novel high capacity binary watermarking algorithm based on DCT" @default.
- W2370327604 hasPublicationYear "2014" @default.
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