Abstract. The reduction of output bitrate of video source (of I-frames) and consequently the improvement of multiplexer’s gain are the main target of this paper. In reducing the bitrate, the SVD transform coding as an attractive alternative to the DCT coding was adopted. The SVD transformation just like DCT is a lossy image compression, but it can achieve a higher rate. The rank of SVD matrix t...

This paper discussed an improvement algorithm of image digital watermarking based on the discrete wavelet transform (DWT) and singular value decomposition (SVD). In this algorithm, a good characteristic of multiresolution and time-frequency local analysis of discrete wavelet transform combining with image intrinsic algebraic properties of SVD. After decomposing the original host image into four...

The reduction of output bitrate of video source (of I-frames) and consequently the improvement of multiplexer’s gain are the main target of this paper. In reducing the bitrate, the SVD transform coding as an attractive alternative to the DCT coding was adopted. The SVD transformation just like DCT is a lossy image compression, but it can achieve a higher rate. The rank of SVD matrix transform w...

In this paper, a color image watermarking algorithm based on Redundant Discrete Wavelet Transform (RDWT) and Singular Value Decomposition (SVD) is proposed. The new algorithm selects blue component of a color image to carry the watermark information since the Human Visual System (HVS) is least sensitive to it. To increase the robustness especially towards affine attacks, RDWT is adopted for its...

In this paper a watermarking method using hybrid wavelet transform and SVD is proposed. Hybrid wavelet transform generated from two different orthogonal transforms is applied on host and SVD is applied to watermark. The transforms used for hybrid wavelet transform generation are DCT, Walsh, Haar and DKT. First component transform used in generation of hybrid wavelet transform corresponds to glo...

Digital watermarking is one of the vital solution for protecting the intellectual property rights, copy control and content verification. It involves lot of human efforts, cost and time for their protection. Digital watermarking by hybridizing the various transforms along with singular value decomposition (SVD) has gained substantial attention due to development of efficient techniques which in...

To embed watermark is a way to increase the robustness of the image. In this paper the singular value decomposition (SVD) based image watermarking scheme is proposed. The output result of SVD is more secure and robust. In the proposed scheme D and U components are used for embedding watermark. Unlike other transforms which uses fixed orthogonal bases, SVD uses non fixed orthogonal bases. The re...

The Singular Value Decomposition (SVD) is an important tool for linear algebra and can be used to invert or approximate matrices. Although many authors use "SVD" synonymously with "Eigenvector Decomposition" or "Principal Components Transform", it is important to realize that these other methods apply only to symmetric matrices, while the SVD can be applied to arbitrary nonsquare matrices. This...

This paper presents a technique of digital image watermarking using DCT wavelet transform. Use of Haar wavelet is very common in watermarking. However, here DCT wavelet transform of size 256*256 is generated using existing well known orthogonal transform DCT of dimension 128*128 and 2*2. This DCT Wavelet transform is used in combination with the orthogonal transform DCT and SVD to increase the ...