A Color Watermarking Method Based on the Combination of Directional Anisotropy and Singular Value Decomposition

Abstract

The present invention is based on the color watermarking method combining directional anisotropy and singular value decomposition, and the steps include: 1) SVD transformation is performed on the binary watermark image, and the transformed singular value information is extracted as embedded information; 2) Canny edge detection algorithm is used 3) Select the sampling matrix and anisotropy ratio; 4) Perform Dirctionlet transformation on the blue component of the image; 5) Select the intermediate frequency sub-band to perform singular value decomposition, 6) Binary The singular value information of the image is embedded in the singular matrix of the intermediate frequency subband; 7) After inverse SVD transformation and inverse Directionlet transformation, the blue component image embedded with watermark is obtained, and the color image embedded with watermark is obtained by combining the red and green components. The method of the invention greatly improves the invisibility and robustness of the watermark scheme.

Description

technical field [0001] The invention belongs to the technical field of digital image processing, and relates to a color watermarking method based on the combination of direction anisotropy and singular value decomposition. Background technique [0002] In the existing image watermarking algorithms, most of the carrier images are grayscale images, and the watermarked images are binary images or grayscale images. With the widespread use of more and more color images on the Internet, the research of embedding watermark images into color main images has become the research focus of watermark algorithms, and invisibility and robustness are the most important factors to measure watermark schemes. Therefore, researching an invisible and robust watermarking scheme has attracted the attention of many researchers. [0003] At present, the color image watermarking schemes that have been studied mainly include two types: the first method is a color watermarking scheme based on the spat...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a color watermarking method based on the combination of directional anisotropy and singular value decomposition, which solves the problems of invisibility and low robustness of equalization in the prior art

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