【摘要】 提出了非完备性鲁棒性数字水印典型算法中的行之有效的设计策略,利用小波变换良好的时频局部特性,提出了基于块的小波变换的数字图像水印嵌入方案。为了使嵌入图像的水印具有更高的安全性,把扩频通信的概念和方法引入数字水印系统中,采用了扩频理论中的伪随机序列进行处理。更多还原

【Abstract】 The paper brings forward effective project strategy of nonmaturity haleness watermark model arithmetic.Making use of timefrequency local characteristic of wavelet switch,the paper brings forward digital image watermark inserting project basing on block of wavelet switch.In order to improve the image watermark’s security,the paper imports expanding frequency communicative conception and means to the digital watermark system,and adopts expanding frequency theory’s management.更多还原