摘要
为了保证鲁棒性,提高水印的不可感知性,提出了一种基于离散余弦变换(DCT)和奇异值分解(SVD)的数字水印算法。该算法首先将载体图像分块,接着对每个分块进行离散余弦变换。然后将水印信息嵌入到每个分块的直流区域。嵌入时先利用奇异值分解,接着在直流区域的奇异值对角矩阵上添加水印的奇异值对角矩阵信息。实验结果表明,算法确保视觉无差异基础上对鲁棒性有所提升。
In order to guarantee the robustness,improve the watermark is perceptual,is put forward Based on the discrete cosine trans form(DCT)and singular value decomposition(SVD)of the digital watermarking algorithm.The algorithm firstly the carrier image block,and then for each block discrete cosine transform.And then the watermark information embedded into each block of the dc area.Embed ded when first using the singular value decomposition,and then in the dc area on the diagonal matrix singular value of the diagonal ma trix of the singular values of the watermark information.The experimental results show that the algorithm Based on visual indifference to improve robustness.
作者
李磊
LI Lei(Qiongtai Normal University,Haikou 571100,China)
出处
《电脑知识与技术》
2019年第10X期197-199,共3页
Computer Knowledge and Technology
