实用图形水印算法研究  

An Applicable Graphic Watermark Embedding Algorithm

作　　者：韩贤东[1] 王凤儒[2] 

机构地区：[1]哈尔滨师范大学计算机系,黑龙江哈尔滨150040 [2]哈尔滨理工大学计算机与控制学院,黑龙江哈尔滨150080

出　　处：《哈尔滨理工大学学报》2004年第2期67-68,72,共3页Journal of Harbin University of Science and Technology

摘　　要：基于小波水印算法在不可见性和鲁棒性上能够很好地平衡,分别提出了针对矩形图像的水印扩展算法及其相似度定义,并进行了模拟运行。结果表明,新的水印扩展算法在图像降质较大的情况下依然有很好的不可见性;新的相似度定义有较强的抗降质提取图形水印的能力。This paper proposed an algorithm of rectangle image watermark embedding. In watermark embedding algorithms, the one based on wavelet transform has good performance in balancing perceptual transparency and robustness. So according to the theory of wavelet transform, new rectangle image watermark-extending algorithm and similarity are proposed. Experimental result shows that new watermark extending algorithm sustains good perceptual transparency after high degradation image operation and new similarity has the ability of anti degradation abstraction of graphic watermark.

关 键 词：数字水印 小波变换 矩形图像 相似度 水印扩展算法 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TP301.6[自动化与计算机技术—计算机科学与技术]