Spatial domain color image blind watermarking method fused with Haar transform
A color image, blind watermarking technology, applied in image watermarking, image data processing, image data processing and other directions, can solve the problems of watermark embedding and extraction time lengthening
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[0042] The purpose of the present invention is to provide a kind of space-domain color image blind watermarking method that combines Haar transform, comprises the embedding process and extraction process of color image digital watermark, and the specific process of its watermark embedding is described as follows:
[0043] Step 1: Preprocessing of the color host image: convert a 24-bit color host image with a size of 512×512 H Perform layered processing to obtain three layered host images of red, green, and blue H p , and divide the pixels in each layer into 2×2 non-overlapping image blocks, p =1,2,3 represent red, green and blue respectively;
[0044] Step 2: Preprocessing of color watermark images: 24-bit color watermark images with a size of 32×32 W Do layered processing to obtain three layered watermark images of red, green, and blue, and then perform a private key-based K p The affine transformation of the scrambled layered watermark image W p , p = 1, 2, 3 represe...
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