彩色图像DWT变换下的块SVD零水印
A Zero-watermarking Algorithm of Color Image Based on SVD and DWT
-
摘要: 为了提高水印技术的鲁棒性, 提出了彩色图像离散小波变换 (DWT) 下的块奇异值分解 (SVD) 的零水印.首先对原始载体图像进行离散小波变换, 然后选择低频子带进行分块, 且对每一块进行奇异值分解, 水印则由分解得到的最大前m个奇异值产生.实验结果表明, 算法对各种攻击有较强的鲁棒性.Abstract: In order to enhance the robustness of watermark technology, a zero-watermark is proposed based on color image using block singular value decomposition (SVD) under the discrete wavelet transformation (DWT) .It conducts DWT with the original image, divides its low frequency band into blocks, and conducts SVD with every block.Zero-watermark is generated by the decomposition of the former largest singular values of mof the block matrix.Experiments show that the proposed algorithm has strong robustness against various attacks.
下载:
