摘要
提出一种新的基于DCT和SVD分解的水印算法,该算法首先进行分块DCT变换,直接用一参数对要嵌入的中频系数进行修改,再对嵌入水印后的图像进行SVD分解,将两个随机序列嵌入到各子块的奇异值中,达到重复嵌入水印。实验表明,此双水印系统能够达到标识、认证图像所有权的目的。
Proposes a new watermarking algorithm for digital image based on DCT and SVD. After block DCT transformation, uses a parameter to quantize the middle-frequency coefficients. Based on block SVD, two random sequences is embeded into singular values of every block ,realizes dual watermarking.The experiment shows that the dual watermarking system can indicate and verify the ownership.
出处
《现代计算机》
2008年第10期92-94,共3页
Modern Computer
