自适应空域、小波域组合鲁棒水印算法  

Adaptive Spatial/Wavelet Domain Combined Robust Digital Watermarking Algorithm

作　　者：林其伟[1] 冯桂[1] 

机构地区：[1]华侨大学信息科学与工程学院,福建泉州362021

出　　处：《集美大学学报（自然科学版）》2008年第2期108-112,共5页Journal of Jimei University：Natural Science

基　　金：福建省自然科学基金资助项目(A0610022)

摘　　要：为了更好的解决水印算法不可见性和鲁棒性这对矛盾,提出了一种基于空域、小波域组合的自适应灰度水印算法,在不破坏图像质量的前提下,可嵌入更多的水印数据.算法先将水印分块,分别进行置乱,然后按其重要性分别嵌入到原始载体图像的各级小波域系数中,嵌入时根据HVS自适应选择水印的嵌入强度.实验结果表明,所提算法不仅鲁棒性和安全性好,而且在同样的图像视觉质量下,嵌入的水印容量更大.In order to settle the problem of robustness and imperceptibility, a novel adaptive spatial domain and wavelet domain combined image watermarking algorithm was proposed in this paper. Under the precondition of keeping the quality of image, the greater capacity of watermark could be embedded. In this algorithm, we first decomposed the watermark into several sub-bands, and according to their significance, embedded them to different DWT coefficients of the host image. While embedding, the HVS was considered. The experimental results have shown that the proposed algorithm has better performance in the aspects of robustness and security. And with the same visual quality, the technique has a larger capacity.

关 键 词：数字水印 HVS DWT 置乱 自适应 

分 类 号：TP309[自动化与计算机技术—计算机系统结构] TN911.7[自动化与计算机技术—计算机科学与技术]