【摘要】 本文提出了一种基于离散小波变换与奇异值分解相结合的水印嵌入方法。对混沌置乱后的水印奇异值分解,把分解后的奇异值重复嵌入到原始图像小波变换后的各子带中,根据不同的攻击方式在不同的小波子带中提取水印。实验仿真表明,这种方法对几何攻击、加噪、JPEG压缩等均保持了良好的稳健性。更多还原

【Abstract】 This paper proposed a watermarking algorithm based on discrete wavelet transform(DWT) of image and singular value decomposition(SVD). The original image is decomposed with DWT,the watermarking image is decomposed with SVD after chaotic scrambling,then the singular values of watermarking are embeded into all subbands of decomposed original image.Based on the ways of attack,select different subband to pickup the watermarking.Experiment results confirmed that the proposed watermarking algorithm was robust to geometric attack and imnoise,JPEG compression etc.更多还原