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- W2364614317 abstract "A content based image public watermarking algorithm which operates in DCT domain is proposed in this paper. Two neighboring sub-blocks in the Hilbert sequence is pseudo-randomly selected by using chaotic sequences. Then a watermark with visually recognizable pattern is embedded into the original image by changing the polarity of the corresponding middle-frequency coefficients in the two chosen neighboring sub-blocks, and the watermark is adapted to the image by exploiting the masking characteristics of the human visual system (HVS), thus ensuring the watermark invisibility, and the watermark don't need the original image. The experimental results show that the proposed algorithm in this paper is robust to common signal processing techniques and some geometric distortions, such as cropping, scaling and rotation. Especially, it achieves high robustness under signal enhancement operations, such as sharpening, contrast enhancement, edge enhancement and histogram equalization." @default.
- W2364614317 created "2016-06-24" @default.
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- W2364614317 date "2007-01-01" @default.
- W2364614317 modified "2023-10-03" @default.
- W2364614317 title "A Public Watermarking Algorithm Based on Image Content" @default.
- W2364614317 hasPublicationYear "2007" @default.
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