An Improved Blind Watermarking Scheme in Wavelet Domain.

摘要: The trade-off between the imperceptibility and robustness is one of most challenges in digital watermarking system. To solve problem, this paper proposes an improved blind algorithm for images based on combination Discrete Wavelet Transform (DWT) decomposition Particle Swarm Optimization (PSO). For protecting copyright information a image, watermark preprocessed with affine scrambling embedded vertical subband ( ) coefficients wavelet domain. Furthermore, proposed PSO performed to train scaling factors accomplish maximum strength while decrease visual distortion. Simulation results demonstrate procedure has remarkable performance various attacks superiority scheme.