Method, device and storage medium for hiding and restoring line art pictures

Abstract

The invention belongs to the intersection field of image information security and digital image signal processing, and discloses a method, device and storage medium for hiding and restoring line art paintings. By converting the cover image into a multi-level halftone image, and making multiple backups of the secret information, the embedding position of the secret information is located according to the user key, and the secret information and cover pixels are encoded by combining the thickness of the line drawing to generate a dense line drawing. The secret information is decoded according to the key, and the accuracy of secret information recovery is improved through the secret information recovery strategy based on multiple backups. Compared with the existing methods, the hiding and recovery process of the present invention is strictly dependent on the user key, has certain attack tolerance and recovery capabilities, high embedding capacity and low transmission cost, and the generated embedding cover is a special carrier, and the original cover It is not transmitted in the channel and can resist the detection of the steganography analyzer based on the statistical characteristics of natural images, which has high security.

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, device 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 embeddings, such as modifying pixel values ​​or frequency domain coefficients to embed secret information. This type of algorithm is easy to leave modification traces, making it difficult to resist the detection of steganographic analysis algorithms based on natural image statistical characteristics. . [0003] In order to overcome this problem, people have proposed carrierless information hiding methods, the typical one is search-based carrierless information hiding, which expresses secret information by searching for a suitable natural carrier without modification. For example, Zhou Z L, 2015 (Zhou ZL, Sun H Y, Harit R, et al. Coverless im...

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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