An efficient digital watermark embedding algorithm for color image was presented in this paper, which is based on the discrete wavelet transform (DWT) and the spectral characteristics of human vision system. Firstly, three color separations was performed for color image, and color components of color image were transformed by DWT. Secondly, the embedding position of the watermark was confirmed ...

In this chapter, we propose a pixel adjustment procedure for digital watermarking methods using uniform color space. Many digital watermarking methods use uniform color space due to the convenience of controlling image quality (Yoshiura & Echizen, 2006). However, there is the problem that watermarked RGB integer pixel values in such methods are not quite corresponding to the watermarked real-nu...

There is a generally–accepted tendency to consider and process color images as a set of parallel gray–scale planes (instead of an ensemble of a 3–D realization). Although, even now, many researchers make the same assumption, but it is proved that using vector geometries leads to more promising results. In this paper, by processing the color images as vector geometries, a novel method is propose...

A color image adaptive watermarking scheme is proposed. To increase the robustness and perceptual invisibility, a model called ICPM (image complexity and perceptibility model) is proposed to analyze the different sub-blocks’ properties. A novel technique is proposed for the watermark casting and retrieval by utilizing the properties of the image itself. Experimental results demonstrate the robu...

Zero-watermarking methods provide promising solutions and impressive performance for copyright protection of images without changing the original images. In this paper, a novel zero-watermarking method color is envisioned. Our envisioned approach based on multi-channel orthogonal Legendre Fourier moments fractional orders, referred to as MFrLFMs. method, highly precise Gaussian integration util...

Robustness is one of the crucial important issues in watermarking. Robustness against geometric distortion and JPEG compression at the same time with blind extraction remains especially challenging. In this paper, a blind discrete wavelet transform-discrete Fourier transform (DWT-DFT) composite image watermarking algorithm that is robust against both affine transformation and JPEG compression i...

In this paper a novel spatial domain multiple watermarking scheme for color Images is proposed. The proposed scheme is of type blind and invisible watermarking. A binary watermark image is permutated using a secret key. The host image is divided into five blocks .Blocks size equals on the size of watermark image. The watermark is a binary image, embedded into five blocks of the host image by al...

DCT-based transformed domain watermarking algorithm has some flaws In the aspects of embedding position, embedding strength and embedding method, which have an important influence on watermarking embedding and watermarking extracting. In this paper we discussed these key techniques on DCT-based transformed domain watermarking algorithm and spatial domain digital watermarking algorithm, and thei...

In watermarking schemes, the discrete wavelet transform (DWT) is broadly used because its frequency component separation is very useful. Moreover, LU decomposition has little influence on the visual quality of the watermark. Hence, in this paper, a novel blind watermark algorithm is presented based on LU transform and DWT for the copyright protection of digital images. In this algorithm, the co...

Image watermarking is an important aspect of the security of data. The robustness of watermarking and the capacity of the watermarking process are the main research area for researcher. The watermarking including encryption technique is the main aim of this paper. Discrete Wavelet Transform has been used for the watermarking and PN sequence based random sequence is used for the encryption of th...