Digital Watermarking Algorithm Based on Chaotic Encryption and HVS

A blind robust digital image watermarking scheme using chaotic encryption and HVS in DWT domain is presented. Firstly, the original image is transformed into some sub-band coefficients using discrete wavelet transformation (DWT), and then the binary image watermark signal is encrypted using logistic chaos map before it is embedded. Taking into account the characteristics of human visual system (HVS), the watermark is embedded into the important sub-band coefficients. Because of the multi-resolution decomposition for DWT and meaningful HVS, the proposed scheme can achieve good robustness, which is demonstrated in the following experiments.