A dual pseudo random sequence digital watermarking algorithm based on DCT

This paper proposes a improved algorithm to embed and detect the digital watermark in digital image. And it uses a highly efficient and practical programming tool MATLAB to achieve a block-based on DCT domain digital watermark embedding and extraction validated. First, transform the watermark information into a binary string, with dual unrelated normal pseudo random sequence of real numbers representing the 0 and 1 of the watermark information embedded in the image of the DCT middle frequency coefficients. After these attacks based detection of correlation matrix to extract the correct watermark. Demonstrate the robustness and invisibility. Propose some improvement methods.