基于坐标对准的抗剪裁数字水印盲检测技术

本文提出了一种基于坐标对准的数字水印方案。它首先对含有版权信息的二值水印序列进行混沌置乱，以柽高水印的安全性，然后把置乱的序列嵌入原宿主图像的DCT中频系数中，同时也在宿主图像嵌入了坐标信息，以便接吱方时可能受剪裁攻击的图像进行坐标对准，从而在正确的位置提取出水印。仿真结果表明，该水印方案可实现盲采印检翻，具有菝高的安全性和保真性，不仅能有效抵抗剪裁攻击，而且对JPEG压缩、加噪、均值滤波等也具有很好的鲁棒性。

A Blind Detection Method of Digital Watermark Based on Coordinates Calibration

A blind detection method of digital watermark based on coordinates calibration is proposed in this paper.The watermark array is first permuted for the sake of security.Then the binary watermark is embedded into the original host image,and the coordinates information are blended in the same image as well.Therefore,the coordinates can be calibrated for restoring watermark from the right place.Simulation results show that the proposed method can realize blind detect for watermark,and is of high security.It is robust to cutting interception,JPEG compression,additional noise,mean filtering,and also cutting in real sense.