In this paper, a wavelet-based digital image watermarking algorithm is put forward, advantage of the zero-watermark. In proposed algorithm, the key is generated by XOR operation. This algorithm has very srong robustness, because when under the conventional attacks the hight bits of the pixel point are hardly changed At the same time it has very strong invisibility, because it dose not modify the data of the original image. Experiments show that a better robustness to the image processing such as JPEG compression,noise adding and smoothing filtering can be achieved Meanwhile,embedding informati...
