提出了一种基于SVD分解与小波分解的小波隐形水印算法.通过奇异值分解实现盲提取,把水印图像嵌入小波分解的中频子带,最后运用归一化互相关函数(NC)和峰值信噪比(PSNR)进行定量分析,验证该算法有很好的不可见性与鲁棒性.
Based on SVD decomposition,an digital watermarking algorithm with the method of wavelet transform is proposed.By means of singular value decomposition to realize blind extracting,the watermarking image is embedded into intermediate frequency sub bands of wavelet composition.Finally,applying normalized cross-correlation function(NC)and peak signal to noise ratio(PSNR),it has proved that this algorithm has better invisibility and robustness.