一种彩色图像水印方法的抗攻击性能

Defencing attacks of watermarking algorithm for color images

提出基于JPEG压缩和DCT变换的数字水印算法,设计了多个自适应因子,能够根据图像的局部特征自动调整嵌入的程度.在保证水印不可见的前提下,以相似度为度量准则,采用实验标定方案对嵌入强度的参数进行优化,实现水印信号最优嵌入.同时对其抗攻击性能进行了实验分析,实验结果表明该方法有较好的鲁棒性.

A digital watermark algorithm is presented based on the JPEG compression and DCT transform. This algorithm contains a variety of self-adaptive factors which can automatically adjust the em- bedded degree according to the regional feature of the image. The algorithm can realize the optimized embedding in the guarantee of the invisibility of the digital watermarking and optimize the parameters of the embedded intensity under the measurement guideline of similarity and by adopting the experimental demarcating program. Meanwhile, the experimental analysis of its anti-attack capability is realized; and the experimental results show that this algorithm has better robustness.