【摘要】 基于提升小波方案,提出了一种新的灰度图像数字水印算法。该算法首先将水印图像置乱并得到其奇异值,接着将原始RGB图像转换到YUV空间后,对亮度分量Y进行提升小波变换,并选择低频图像中的对角线方向上纹理变化较丰富的地方,最后把得到的奇异值嵌入其中。实验表明,该算法对常规的图像攻击具有很好的鲁棒性。更多还原

【Abstract】 Based on lifting scheme wavelet, we proposed a new gray-scale image watermark algorithm. First of all, the algorithm will calculate its singular value after scrambling the watermark image; then convert the original RGB image to YUV color space, and choose larger changing place of texture blocks in the direction of diagonal from Low-frequency image based on lifting wavelet trans- form; finally, the above-calculated singular value to be embedded in them. Simulation results show the algorithm has good robustness.更多还原