WATERMARKING ALGORITHM OF SPATIAL DOMAIN IMAGE BASED ON SVD

This paper presents a blind digital watermarking algorithm based on spatial images. We study the theory and characteristic of singular value, scrambling the serial digital watermark images again which mapped out through the chaotic sequence. We divided the original carrier image into blocks, and deal with each small block with the singular value decomposition in order to extract various small singular value matrix, we embed watermarking into the singular value after quantification processing. We carries out the robustness of the experimental, such as JPEG compression attack, cropping attack, noise attack, rotation attack, filtering attack, the results show that this algorithm has strong robustness and better visibility.