抗局部几何失真的可读水印算法研究  

A Readable Watermarking Algorithm against Local Geometric Distortion

作　　者：连志春[1] 

机构地区：[1]朝阳师范高等专科学校数学计算机系,辽宁朝阳122000

出　　处：《辽东学院学报（自然科学版）》2007年第4期220-224,共5页Journal of Eastern Liaoning University:Natural Science Edition

摘　　要：提出了一种可有效抵抗局部几何失真的可读取图像水印新算法。该算法首先利用Harris算子提取特征点作为水印信息的同步标识,并以每个特征点为中心确定一系列不相交的局部区域;然后,根据人眼视觉系统掩蔽特性,通过量化调制小波系数的方式将一个大小为1024-bits的可读水印独立地、自适应地嵌入到所有局部区域中。仿真实验结果表明所提出算法不仅具有良好的透明性和较理想的水印容量,而且对常规信号处理和各种几何攻击均具有较强的鲁棒性。A readable watermarking algorithm against local geometric distortion was proposed. The algorithm took the feature points extracted with Harris operators as resynchronization of watermarking information, and defined several disjoint regions centered with each feature point. Furthermore, based on the masking properties of human visual system （ HVS）, a 1024 - bit readable watermark was independently and adaptively embedded into the DWT domain of the local regions. Experimental results show that the proposed scheme is not only transparent, but also has strong robustness against common signal processing and geometric attacks.

关 键 词：图像水印 局部几何失真 特征点 局部区域 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]