Research on Key Technologies of Image Digital Watermarking Based on Wavelet Analysis

Image watermarking using wavelet analysis for image copyright protection. Summarize and compare the characteristics of four different wavelet embedding methods. Using DW to decompose images and embed watermarks into wavelets, achieving high concealment and strong robustness. Compare the robustness results of JPEG compression attack experiments with SVD and DCT methods. The results show that this method maintains high watermark extraction accuracy under various attacks, with good image quality after embedding, demonstrating its strong robustness and high invisibility. This method can maintain visual image quality and effectively resist multiple attacks, providing a good technical solution for image copyright protection.