Watermark image restoration method based on SLT-DM
A technology for watermarking images and image sub-blocks, applied in image watermarking, image data processing, image data processing, etc., to achieve the effect of high computational complexity and fully reversible restoration
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[0073] This embodiment considers the overflow problem faced by the robust reversible watermarking algorithm, and intends to effectively and simply avoid the overflow problem without causing other problems without destroying the invisibility and embedding capacity of the watermark.
[0074] The present invention designs an anti-overflow jitter modulation module, and provides a robust reversible image watermarking method based on SLT-DM, such as figure 1 As shown, there are three processes including watermark embedding, watermark extraction and image restoration.
[0075] Among them, the watermark embedding process is as follows: figure 2 shown, including:
[0076] Step A10, original image preprocessing.
[0077] If the original image is a color image, the G channel layer of the original image is taken as the preprocessed image; if the original image is a grayscale image, the original image is used as the preprocessed image; the preprocessed image is divided into different si...
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