基于粗糙集理论的数字图像水印嵌入策略

Embedding tactics of digital image watermarking based on rough set theory

针对粗糙集理论应用于数字图像信息处理的可行性,提出基于粗糙集规则推理的水印嵌入策略选择方法.将载体图像视为知识系统,按照水印算法对视觉效果或者鲁棒性能的需求设置属性,并划分等价类.通过属性的约简和确定性因子的度量筛选出适合水印嵌入的位置.通过测试图像的实验证明该方法的有效性和可扩展性.

Aimed at the feasibility of using rough sets theory in digital image watermarking technology,a method for selection of embedding tactics for watermark information was put forward based on the rule induction of rough sets.The carrier image was regarded as a knowledge system,the attributions were set and divided into some different equivalence classes according to the request of visual effect or robustness of watermarking algorithm.Suitable positions for watermark information to be embedded were selected through the reduction of attributes and metering of determinacy factors.After the experiments carried on the tested images,the validity and expansibility of this method were verified.