An Image Tampering Detection Method Based on Double-Image Reversible Fragile Watermarking

Abstract

The invention discloses an image tampering detection method based on reversible fragile watermarks of two images. Every two pixels of a host image are divided into a group, a reversible information hiding algorithm is used to embedd authentication information into each group of pixels, finally two watermark images are generated, and in the time of authentication, whether each group of pixels is tampered is determined through comparing information extracted from the two watermark images and original authentication information. According to the method, an image redundancy space can be more fully and flexibly utilized, while a lot of authentication information is embedded, the image distortion is reduced, and the accuracy of tampering authentication is improved.

Description

technical field [0001] The invention relates to an image information technology, in particular to an image tampering detection method based on a double-image reversible fragile watermark. Background technique [0002] With the continuous development of digital multimedia and computer networks, the replication, storage and dissemination of data such as text, audio, image and video with digital media as the carrier has been widely used, bringing people's daily life, work and study. Great convenience. Today, with the rapid development of image processing software, digital images can be easily modified and difficult to detect. Direct use of unauthenticated images has huge risks. Pure information encryption does not have any integrity protection, and any information changes are blocked. It is considered legal, which leads to the attacker intercepting the encrypted information, tampering with it, destroying it, and then sending it, making the encrypted information unable to be tr...

AI Technical Summary

Problems solved by technology

[0003] However, most current image tampering authentication methods use irreversible information hiding algorithms, and some fragile watermark authentication algorithms based on reversible information hiding, for example: in 2014, Lo et al. Embed the host image, the authentication result is not satisfactory

[0004] However, these existing methods more or less have the following defects: Most of the tampering authentication methods based on fragile watermarks are irreversible, and the original image cannot be restored without error after tampering detection; or it can be restored but it will lead to inaccurate detection of the modified area.

Ultimately, it will affect image security performance

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