基于离散小波变换和人类视觉系统的数字水印算法

Study and Application of Digital Watermarking Algorithm Based on Discrete Wavelet Transform and Human Visual System

通过对人类视觉系统(HVS)的亮度特性、频域特性、图像类型特性的研究,提出一种基于离散小波变换和人类视觉系统数字水印算法,将秘密信息嵌入到小波变换不同的方位系数中.实现了水印信号在图像信息中的嵌入与提取,达到隐藏秘密信息的目的.实践证明该算法能提高水印的不可见性,同时具有很强的鲁棒性.

Based on DWT and HVS a digital watermarking algorithm is presented regarding brightness characteristics, frequent domain characteristics and mage type characteristics of HVS. The secret information can be embedded into different orientation factors of DWT, which achieves intercalation and extraction of a digital watermarking in image information, and serves the purpose of protecting information security. The experience of practice shows that the algorithm can improve the invisibility with strong robustness.