Optimized DWT-based image watermarking

The discrete wavelet transform is used extensively as a basis for efficient digital image watermarking. However, most wavelets-based watermarking algorithms failed to provide perceptual transparency and robustness simultaneously, since these two watermarking requirements are conflicting requirements. In this paper, we treat the image watermarking problem as an optimization problem and solve it using genetic algorithms. Simulation results indicate optimal image watermarking is achieved only if the watermark is embedded in specific wavelet sub-bands and watermark- amplification values were used.