HVS based wavelet watermarking with bit data embedded in color images

In this paper, a wavelet-based perceptual watermarking considering human visual system (HVS) that is proposed by Barni et al. (see IEEE Trans. Image Processing., vol.10, no.5, p.783-791, 2001) for monotone images without embedding bit data is extended. In our method, an arbitrary length of bit data (binary pattern) can be embedded in brightness component of color images still keeping the perceptual quality of image. Pseudo random number (PN) sequence is introduced as a key to produce a watermarking code. The availability increases compared with the conventional methods. The robustness of our computationally efficient watermark extraction method to the attacks such as JPEG compression, cropping and color tone modification is shown in simulations.