High-capacity reversible image watermarking algorithm based on multi-scale decomposition and interpolation expansion
A multi-scale decomposition and image watermarking technology, applied in the field of image processing, can solve the problems of low visual quality and embedding capacity, and achieve the effects of good invisibility and payload capacity, expanded capacity, and good visual quality
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[0072] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0073] The invention discloses a large-capacity reversible image watermarking algorithm based on multi-scale decomposition and interpolation expansion, which mainly includes two parts: watermark embedding and watermark extraction, which are described in detail below:
[0074] Watermark embedding steps:
[0075] Step S1 performs cat face scrambling transformation on the watermark W to obtain W', and transforms W' into a one-dimensional binary sequence.
[0076] The traditional cat face Arnold scrambling transformation matrix is relatively simple, and it is easy to be decrypted by the attacker to restore the original watermark when it is attacked maliciously. The confidentiality and robustness are not strong enough. In order to enhance the anti-attack robustness and security of the digital image watermarking system, this paper improves the traditional Arnold scrambl...
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