Non mono image watermarking based on the DCT-Domain of three RGB color channels

Color image water marking is becoming more and more important and finding application in different areas of discipline. Developing robust image water marking algorithm which is immune to noise, cropping and compression is aexigent task. Altering the size of the image or its orientation reduces the recoverability of the watermarked imaged. In this paper I proposed a new block of DCT –based digital watermarking scheme based on embedding an adapted watermark in the three RGB channels of the original color image. Voting is used to extract the best candidate pixel value. The proposed embedding procedure improves the imperceptibility and the robustness of the watermarked image against the different attacks such as noise, cropping and JPEG compression. Experimental results have shown the superiority of proposed scheme over a classic DCT watermarking.