The Research of Image Watermarking Encryption Algorithm

The image watermarking technology is an important aspect about multimedia authentication and copyright protection, in order to enhance its reliability and security, this paper proposes an encryption algorithm based on color image watermarking in security DCT domain. By processing the color watermark image´s R, G, B pixels, that is, converts the pixel value matrix into binary one-dimensional sequence, then get the one-dimensional sequence as the watermark embedding the carrier images, overcame the traditional understanding defects about the DCT domain can only be embedded two value image. Furthermore, through setting the key to strengthen the security and prevent unauthorized watermark recovery and repair. Finally use the MATLAB/SIMULINK and the Embedded MATLAB™ to build the watermark embedding and detection system model, quickly and intuitively verify the correctness of the watermark encryption algorithm. Experimental results demonstrate that its robustness is good and computational complexity is low, basically achieve non-destructive extraction.