A Fragile Digital Watermarking Method for Stereo Image Pixel Tampering Location

Abstract

The invention discloses a fragile digital watermarking method for tampering and positioning stereoscopic image pixels. At the digital watermarking embedding end, the masking characteristic of binocular visual perception of human eyes, that is, the distortion that can be detected by both eyes, is used to guide the embedding of digital watermarking, so that the stereoscopic image Transparency and watermark embedding capacity have reached a good balance, and according to the high five-bit image information of the left and right viewpoints and the binocular just distortion model as the input of the MD5 hash function to generate a feature watermark image, and then use an adaptive method to embed the watermark information into In the left and right viewpoints of the stereoscopic image, through the above process, the security of the digital watermarking technology is guaranteed; in the process of tampering and positioning, the high five-bit feature watermark information of the attacked stereoscopic image is extracted, and then the watermark information of the attacked stereoscopic image is extracted , comparing the two types of watermark information to initially determine the tampering location, and then using the parallax information to further enhance the accuracy of the tampering location, which can effectively authenticate the authenticity and integrity of the stereoscopic image content.

Description

technical field [0001] The invention relates to a digital watermarking technology, in particular to a fragile digital watermarking method for tampering and positioning stereoscopic image pixels. Background technique [0002] Stereoscopic images are becoming more and more popular because they can provide depth information to bring people a more real new visual experience. At the same time, the application requirements of the market also promote the rapid development of stereoscopic image processing technology. With the continuous development of computer networks and communication technologies, attackers can easily copy, modify, edit, and tamper with stereoscopic images, making the content of these high-end resources questionable. How to locate and authenticate the tampering of stereoscopic image content has become an urgent problem to be solved. [0003] As a kind of information hiding technology, digital watermark technology provides a new solution for multimedia content au...

AI Technical Summary

Problems solved by technology

However, the stereo image digital watermarking methods mentioned above have the following problems: on the one hand, these methods mainly focus on the research of robust watermarking technology, and the research on fragile watermarking methods and their applications is relatively rare; on the other hand, because these methods have not Can fully tap the characteristics of human visual perception, so the transparency and effectiveness of stereoscopic images need to be further improved

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