摘要
提出了一种基于纹理子块的小波变换数字水印算法,该算法能够依据人眼视觉特性,通过水印图像降维、图像子块划分等措施,将随机置乱的数字水印信息嵌入到高频子带的纹理区内,从而高效率地实现局部水印和全局水印之双重目的。实验结果表明:本文提出的数字水印算法不仅具有较好的透明性,而且对诸如叠加噪声、JPEG压缩、平滑滤波、几何剪切、图像增强、马赛克等攻击均具有较好的鲁棒性。
In this paper, we introduce a new digital image watermarking method. This method is based on the discrete wavelet transform (DWT). The digital watermarks are added to the streak blocks at the high frequency bands of the DWT of an image by lowering the dimension of watermark logo and partitioning the high frequency bands. Experimental results show that the watermarking scheme proposed in this paper is invisible and robust to cropping, and also has good robustness to compression, filtering, noise adding, image enhancement, and mosaic.
出处
《微电子学与计算机》
CSCD
北大核心
2004年第7期106-109,共4页
Microelectronics & Computer
基金
辽宁省自然科学基金(20032100)
