一种基于轮廓波变换的鲁棒性零水印算法

Zero-watermark is constructed based on stable feature of image and watermark is not embedded into original image. A robust method of zero-watermark in contourlet domain is proposed in this paper. Firstly, the original image is decomposed by contourlet transform. Secondly, we select the binary bitmap of low frequency band in contourlet domain as stable feature. Finally, zero-watermark is generated by the stable feature XOR watermark. In order to verify the validity of our proposed method, a series of experiments have been carried out and the results proved that the presented method has much better robustness comparing with other watermark methods.