Comparison of hybrid watermarking technique on different color spaces

Due to the advancement of digital media, data authentication and security has become a major issue. Digital watermarking comes as a solution to it. This paper gives comparative study of digital watermarking technology based on DWT and SVD on various color spaces. The same technique is applied on various color spaces like RGB, YUV and YCbCr in case of color image. The quality of watermarked image is measured using PSNR and the quality of extracted watermark is measured using Pearson's correlation coefficient. It was observed that the quality of watermarked image is acceptable. Robustness of the algorithm was tested for different attacks. It was observed that the color space YCbCr gave the best results among the three color spaces.