A high-fidelity reversible watermark embedding method
A technology of watermark embedding and point embedding, which is applied in the directions of instruments, computing, image data processing, etc., can solve the problems of inability to accurately estimate the local complexity of p, large pixel embedding distortion, weak prediction performance, etc., and achieve good image redundancy performance, centralization of prediction error histograms, and improved embedding distortion
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[0045] The present invention is mainly composed of the following two parts: S1, watermark embedding process; S2, watermark extraction and original image restoration process. Wherein, the watermark embedding process includes the following steps:
[0046] S11. Image segmentation: Divide the pixels of a carrier image with a size of R×C into two non-overlapping pixel sets A and B, each pixel set contains pixels. The pixels belonging to the pixel set A are first embedded, and then the modified pixels in A are used to predict the pixels belonging to B, and the information is embedded in the pixels in B.
[0047] Here, the embedding process performed on pixels belonging to pixel set A or B is called one-layer embedding. The double-layer embedding guarantees the reversibility of the algorithm.
[0048] S12. Local correlation of pixels: For any pixel p in the pixel set A, the n (n∈{4,...,13}) pixels surrounding p constitute the neighborhood I of p ENP , and denote the pixel set I ...
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