A Non-Blind Image Watermarking Method for Copyright Protection

In this paper, a non-blind watermarking method for protecting the copyright of digital color images is introduced. This based on combination transforms (DWT, DCT) in frequency domain. The embedding process depends partition host image into 16×16 non-overlapped blocks and use edge entropy metric to choose appropriate insertion purpose increasing imperceptibility proposed system. As extraction process, it carried out way that requires presence original but rather follows same protocol extract embedded encrypted watermark. To raise security level, hybrid encryption using chaotic map DNA coding has been applied encrypting watermark before it. Experimental results demonstrate differences between watermarked are indistinguishable. effectively resisted common processing attacks.