A New Adaptive Image Watermarking Algorithm Based-on DWT
نویسندگان
چکیده
A new adaptive image watermarking algorithm is proposed in this paper. A perceptual model based on the computation of NVF (noise visibility function) is exploited in the proposed watermarking scheme. The original image is first transformed in the wavelet domain and the embedding factor is decided through computing the NVF of the mid-frequency; then the watermark is embedded in the selected subband with different embedding factors; finally, the watermarked image is obtained by reverse wavelet transform. Experimental results show that the proposed method is adapted to various gray images with different characteristics and robust to wide verity of image processing operations.
منابع مشابه
A Robust Digital Image Watermarking Scheme Based on DWT
In this paper a wavelet-based logo watermarking scheme is presented. The logo watermark is embedded into all sub-blocks of the LLn sub-band of the transformed host image, using quantization technique. Extracted logos from all sub-blocks are merged to make the extracted watermark from distorted watermarked image. Knowing the quantization step-size, dimensions of logo and the level of wavelet tra...
متن کاملResearch on Color Watermarking Algorithm Based on RDWT-SVD
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...
متن کاملIntelligent scalable image watermarking robust against progressive DWT-based compression using genetic algorithms
Image watermarking refers to the process of embedding an authentication message, called watermark, into the host image to uniquely identify the ownership. In this paper a novel, intelligent, scalable, robust wavelet-based watermarking approach is proposed. The proposed approach employs a genetic algorithm to find nearly optimal positions to insert watermark. The embedding positions coded as chr...
متن کاملA Robust Digital Image Watermarking Scheme Based on DWT
In this paper a wavelet-based logo watermarking scheme is presented. The logo watermark is embedded into all sub-blocks of the LLn sub-band of the transformed host image, using quantization technique. Extracted logos from all sub-blocks are merged to make the extracted watermark from distorted watermarked image. Knowing the quantization step-size, dimensions of logo and the level of wavelet tra...
متن کاملAn Adaptive Content Based Localized Watermarking Algorithm for Remote Sensing Image
In this paper, we proposed a new adaptive content-based localized watermarking algorithm for remote sensing images based on DWT, which adaptively embeds corresponding watermarks into the local regions of the remote sensing image instead of the entire one. In order to improve watermarking capability against attacks in the frequency area, we selected some stable feature points in the remote sensi...
متن کامل