DWT-SVD Domain Digital Image Watermarking Using Human Visual System

General watermarking schemes tent not to consider intrinsic characteristics of image, so that watermarks are embedded to entire images. In this paper, we propose a novel image watermarking scheme by applying the characteristics of the human visual system on the SVs of the images in wavelet domain. In this scheme, the watermark bits are embedded on the SVs in the SVD layers for each of the wavelet domain blocks, with the quantization steps adaptive to the statistical model of the block. To improve the fidelity and the perceptual quality of the watermarked image and to enhance the security of watermarking, we model the adaptive quantization parameters based on the characteristics of the HVS within subbands. The scheme is robust against JPEG compression.