Binary image reversible information hiding method based on image enlargement strategy

Abstract

The present invention relates to the field of digital forensics and information security, and more particularly to a binary image reversible information hiding method based on an image enlargement strategy, which is capable of recovering an original image without loss after information extraction. The method comprises: using a cross-shaped mode block to enlarge the original image to achieve the purpose of reversible information hiding; analyzing and classifying 32 types of cross-shaped mode blocks, and selecting the appropriate mode block as the reference mode block to obtain a reference picture with better visual quality; after determining the reference mode block, analyzing the type of the cross-shaped mode block centered on each pixel in the original picture, and using the designed enlargement strategy to enlarge each pixel point into a 2 x 2 block to obtain a reference picture; and finally, using a selection strategy of invertible pixels within a type of block to flip the pixels, and performing information imbedding. The method provided by the present invention can be used for information security, especially for binary image secret information transmission.

Description

technical field [0001] The invention relates to the fields of digital forensics and information security, and more specifically relates to a binary image reversible information hiding method based on an image enlargement strategy. Background technique [0002] With the popularization of the Internet and the rapid development of communication and computer technology, information dissemination channels have become more and more extensive, and information confidentiality has become very important. The sending and receiving parties hope to exchange information secretly. For the consideration of information confidentiality and security, various information hiding technologies have been proposed to transmit information. Most of these technologies use multimedia carriers, such as audio, video, images, etc. as carriers, and then embed Secret information, disseminated on public channels. Compared with audio, video, etc., images are used more frequently and spread faster, so they are...

AI Technical Summary

Problems solved by technology

The above methods are usually irreversible. The existing reversible methods are mainly run-based reversible information hiding methods. This type of method is to embed data by finding a pair of histogram pairs. The method is simple and easy to implement, but the embedding capacity is not high. , there is also a method based on pattern replacement to improve the embedding capacity, but more auxiliary information needs to be recorded, and the position coordinates of all PF patterns in the boundary image need to be recorded

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