Line art picture hiding and recovering method and equipment, and storage medium

Abstract

The invention belongs to the crossing field of image information security and digital image signal processing, and discloses a line art picture hiding and recovering method and equipment, and a storage medium. A blindage image is converted into a multi-order halftone image, secret information is subjected to multiple backups, a secret information embedding position is positioned according to a user secret key, the secret information and blindage pixels are coded in combination with the thickness of a line graph, and a secret-containing line graph is generated. The secret information is decodedaccording to the key, and the accuracy of secret information recovery is improved through a secret information recovery strategy based on multiple backups. Compared with the existing method, the method according to the invention is advantageous in that the hiding and recovering process strictly depends on a user secret key, the certain attack tolerance capacity and recovering capacity are achieved, the secret embedding capacity is high, the transmission cost is low, the generated secret embedding shelter is a special carrier, an original shelter is not transmitted in a channel, detection of asecret analyzer based on natural image statistical characteristics can be resisted, and high safety is achieved.

Description

Technical field [0001] The invention belongs to the cross field of image information security and digital image signal processing, and relates to a method, equipment and storage medium for hiding and restoring line art paintings. Background technique [0002] Since the development of information hiding technology, most of them are modified embedding, such as modifying pixel values ​​or frequency domain coefficients to embed secret information. Such algorithms are easy to leave traces of modification, which makes it difficult to resist the detection of steganography analysis algorithms based on the statistical characteristics of natural images. . [0003] In order to overcome this problem, people have proposed a carrier-free information hiding method. The more typical one is search-type carrier-free information hiding, which expresses secret information by searching for a suitable unmodified natural carrier. For example, Zhou ZL, 2015 (Zhou ZL, Sun HY, Harit R, et al. Coverless ima...

AI Technical Summary

Problems solved by technology

However, the texture synthesis combined with the sample is a small block divided by a given sample image, and a new texture is generated by splicing small blocks, so there are inevitably splicing traces and inherent block repetition patterns.

However, artificially synthesized natural textures are difficult to have real semantics, so they cannot effectively cover up the given secret information.

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