A Watermark Embedding and Extraction Method Combining Non-overlapping Blocks and Equal-Band Fusion
A watermark embedding, non-overlapping technology, applied in instruments, computing, image data processing, etc., can solve problems such as weakened anti-attack ability, watermark quality degradation, and short-board effect of performance differences.
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[0132] The present invention is described below in conjunction with specific embodiments: JAVA jdk1.7.0_09 is used as a case implementation environment, and the implementation of the present invention is described in detail in conjunction with the accompanying drawings, but not limited to this implementation case, wherein figure 1 is the flow chart of the watermark embedding method, figure 2 Is the flow chart of the watermark extraction method.
[0133] A watermark embedding method combining non-overlapping blocks and equal frequency band fusion, comprising the following steps:
[0134] Step 1: Select image A such as image 3 As shown, it is an 8-bit standard grayscale image man.bmp of 1024×1024, and the mask image A=(P i,j ) 1024×1024 The corresponding 160-bit SHA-1 value is A sha-1= 011100010110011101101 01111111100010011111101101101101111011011010010010010010011111111110000000010110001010101011011011011000000011001, from A sha-1 Convert it to 40 hexadecimal numbers se...
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