PSNR and Robustness Comparison Between DCT and SVD Based Digital Image Watermarking Against Different Noise and Attacks

This paper presents a comparison of extracted watermark image quality and robustness between DCT and SVD based digital watermarking techniques. Here two transform domain DCT and SVD based watermarking algorithms are implemented. For better comparison purpose original host image and watermark image are kept same in both algorithms. Before extracting watermark, different image processing attacks and noise are inserted in watermarked image then DCT and SVD based watermark extraction are performed to check PSNR and robustness against those image processing attacks and noise. Obtained experimental results show that between these two algorithms, robustness, and quality of extracted watermark images are better in SVD based watermarking method.