| With the rapid development of the Internet,science and technology have brought people's lives quickly and easily.At the same time,security issues have become an urgent problem to be solved.One of the security issues is about a series of information security issues such as piracy and information tampering on the Internet.Traditional encryption algorithms and digital signature technologies are widely used.Since the traditional encryption algorithm easily exposes the encrypted information during the transmission process,the digital signature technology is developed because the digital signature technology can ensure the effective protection of the data during the transmission process,but this is sacrificed in the data.A large number of signatures,with the advancement of technology,a large number of high fidelity,high precision,high equipment,the traditional encryption algorithm and digital signature technology are gradually being questioned.In order to solve the defects brought by the previous two technologies,digital watermarking technology has been proposed by researchers.At present,digital watermarking technology has good research and development prospects in medicine,military and engineering.In this paper,gray image is taken as an example.Based on the analysis of image texture features and the characteristics of human eye vision,a reversible watermarking algorithm based on image texture characteristics is proposed.The main research work of this paper is as follows:(1)Aiming at the problem that the current gray-scale co-occurrence matrix-based watermarking algorithm has a small capacity,a watermarking algorithm combining gray level cooccurrence matrix with human eye vision is proposed.This method utilizes different textures of image sub-block types to determine the embedding position and embedding capacity of the watermark.The algorithm effectively considers the texture characteristics of the image block and the sensitivity of the human eye,enhances the image quality after embedding the watermark,and improves the watermark embedding capacity.(2)Aiming at the problem that the image sub-block texture has poor anti-attack ability to image watermark embedded information,an image digital watermarking technique combining texture complexity and adaptive region growing is proposed.The texture characteristics of each sub-block region of the image are used to determine the region growth.The rule is to embed the watermark on the ROI region extracted by this growing region.The algorithm combines the texture characteristics of the image with the characteristics of the ROI region to improve the image quality after embedding the watermark,and enhances the anti-attack capability of the image after embedding the watermark.After the watermarked image is subjected to various attacks,the extracted watermark still has a better good accuracy. |
