Digital watermarking is the field of digital image processing which deals with hiding information in a digital content. In this paper, performance analysis of DCT (Discrete Cosine Transform) based digital image watermarking using color spaces is done. Mostly, images that are taken for digital watermarking experiments are in RGB (Red, Green and Blue) color space. Eight different color spaces are...

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...

Digital image watermark has been studied as object. It analyzed the typical digital watermark algorithms based on the space domain and transform domain and key researched watermarking algorithm based on discrete wavelet transform. It has designed and improved blind watermarking algorithm and color image watermarking algorithm. Finally, based on the two improved watermarking algorithm, it has de...

The algorithm of discrete wavelet transform is developed to achieve the integrity authentication of color image contents through embedding watermarking. Firstly, a new watermarking image is generated with the XOR between the original binary watermarking and the image which is processed with Hankel transform. When the watermark is embedded, the original image color is converted first and the bri...

This paper proposes improvements on the embedding and the detection watermarking techniques, aiming for improved color hardcopy watermarking using inkjet printers. We investigate informed coding along with a multibit spread spectrum modulation framework for watermarking color images to be deployed as printed media. The proposed approach aims to maximize the watermarking robustness with a modula...

In order to improve the anti-attack performance of watermark meet requirements copyright protection and content forensics. This paper proposes a digital watermarking hybrid algorithm based on color images. The specific process is adopt idea multi-algorithm layered embedding, choose discrete cosine transform (DCT) algorithm, wavelet transform_singular value decomposition (DWT_SVD) hologram these...

In this paper a region based color image watermarking algorithm is presented. The objective of the method is to embed a particular message in each region of interest (ROI) in the image. The embedding message has to be detected after image manipulations such as cropping, rotation and color JPEG compression. As a basis for the watermarking, a segmentation algorithm is used. Based on the extracted...

The geometrical attacks are still a problem for many digital watermarking algorithms at present. In this paper, we propose a watermarking algorithm for color images resistant to geometrical distortions (rotation and scaling). The singular value decomposition is used for watermark embedding and extraction. The log-polar mapping (LPM) and phase correlation method are used to register the position...