期刊名称：Signal & Image Processing : An International Journal (SIPIJ)
印刷版ISSN：2229-3922
电子版ISSN：0976-710X
出版年度：2013
卷号：4
期号：5
页码：1
出版社：Academy & Industry Research Collaboration Center (AIRCC)
摘要：This paper presents semi blind RGB color image watermarking using DCT and two-level SVD. First, RGBimage is divided into red, green, and blue channels. The blue component is divided into blocks accordingto the watermark size. Second, DCT is applied to each block to form a new block in the transform domain.DC component is retrieved and assembled from each block to form a new matrix of 128x128 pixels. SVD isapplied to the resultant matrix to obtain matrices, U, S and V. The watermark is embedded into the Smatrix. The watermark can be extracted without original host image, however, matrices U1, S and V1 arerequired. Experimental results indicate that the proposed algorithm can satisfy imperceptibility and it ismore robust against common types of attacks such as filtering, adding noise, geometric and compressionattacks.
关键词：Semi blind watermarking; Digital image watermarking; Frequency domain; Discrete Cosine Transform;singular value decomposition; attacks.
