【摘要】 提出了DCT变换域上基于人类视觉特性(HVS)的两种盲水印添加方法.在添加水印时,利用一种常见的混沌系统Tent map帐篷映射对水印做了置乱和加密,并利用人类视觉特性(HVS)对嵌入的水印强度进行了调整,使水印的嵌入强度在不引起视觉警觉的基础上得到显著提高,增强了水印的稳健性.实验证明这两种方法都取得了良好的效果.更多还原

【Abstract】 Two blind watermark algorithms based on HVS in DCT domain are proposed. In these algorithms, a well-known chaotic system "tent-map" is used to generate two chaotic sequence as a key of embedding. For the higher robustness, the authors use the theory of HVS to decide the embedding strength under low distortion. Two blind watermark algorithms are testified both show good performance.更多还原