A robust watermarking hybrid algorithm for color image

In order to improve the anti-attack performance of watermark meet requirements copyright protection and content forensics. This paper proposes a digital watermarking hybrid algorithm based on color images. The specific process is adopt idea multi-algorithm layered embedding, choose discrete cosine transform (DCT) algorithm, wavelet transform_singular value decomposition (DWT_SVD) hologram these three algorithms with robust complementary functions, then embed same image into R, G B layers complete embedding. Compared single-algorithm embedded watermark, can achieve blind extraction, at time, has better robustness resist more types higher intensity attacks. transmission, integrity information carried picture be guaranteed protection, forensics other purposes.