Pixel-wise masking for watermarking using local standard deviation and wavelet compression [articol]

Abstract

Perceptual watermarking in the wavelet domain has been proposed for a blind spread spectrum technique, taking into account the noise sensitivity, texture and the luminance content of all the image subbands. In this paper, we propose a modified perceptual mask, where the texture content is appreciated with the aid of the local standard deviation of the original image, which is further compressed in the wavelet domain. The effectiveness of the new perceptual mask is appreciated by comparison with the old watermarking system.