作　　者： ; ; ;

机构地区： 同济大学电子与信息工程学院计算机科学与技术系

出　　处： 《计算机工程》 2005年第24期177-179,190,共4页

摘　　要： 提出了一种新的小波域鲁棒性水印算法,算法以图像块矩阵的熵和标准差等特征值为依据,对图像进行了光滑和纹理等4个区域的划分,并在此基础上结合小波域系数特征,自适应地选取最佳水印嵌入位置和嵌入强度,从而在保证算法鲁棒性的同时进一步提高水印的透明性。 This paper proposes a novel digital watermarking scheme. According to the spatial features of the host image such as entropy and standard deviation, the image is divided into several kinds of blocks. The best embedding places and density for watermarks are obtained based on the types of blocks and the characters of wavelet coefficients. The performance of the proposed algorithm compared with other wavelet-domain watermarking methods is analyzed, using various test images. Experimental results show that the proposed techniques can survive various attacks and make watermark more imperceptive.

关 键 词： 数字水印 图像分类 熵 离散小波变换 鲁棒眭

领　　域： [自动化与计算机技术] [自动化与计算机技术]