Image reversible information hiding method based on multi-channel difference sorting

Abstract

The invention relates to an image information hiding technology, and particularly discloses an image reversible information hiding method based on multichannel difference sorting, which comprises thefollowing steps: performing difference operation on pixel information of a color image to obtain a trend difference sequence; sorting the trend difference value sequence, and then carrying out difference operation on the minimum sorting value of the trend difference values to obtain complexity; introducing a complexity threshold, and selecting a pixel position of which the complexity is smaller than the complexity threshold as a pixel position with an embedding condition; and for the pixel position with the embedding condition, adaptively modifying the corresponding pixel information of the channel corresponding to the maximum value in the multi-channel difference value sorting sequence, and performing dual expansion on the maximum value prediction error pair based on the multi-channel difference value sorting sequence to complete information reversible embedding. By means of the correlation of pixels among color image channels, trend difference redundancy degrees among the channels are sorted, then the channels are selected in a self-adaptive mode for reversible embedding, and the overall image quality is remarkably improved under the same embedding capacity.

Description

technical field [0001] The invention relates to color image information hiding technology, and specifically discloses an image reversible information hiding method based on multi-channel difference sorting. Background technique [0002] Reversible Data Hiding (RDH) can not only achieve covert transmission in open channels by embedding secret information in the host carrier (such as audio, image, video, etc.), but also ensure that the original carrier is not damaged after the secret information is extracted. recover. Based on this feature, the research of RDH plays an important role in promoting the development of certain content-sensitive specific fields (such as cloud space retrieval management, military operations, and meteorological remote sensing, etc.). [0003] Among the existing RDH methods, methods based on Prediction Error Expansion (PEE) have been extensively studied by scholars because they make full use of the correlation redundancy between adjacent pixels to ac...

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Problems solved by technology

[0005] The purpose of the present invention is to provide an image reversible information hiding method based on multi-channel difference sorting, which solves the problem that the color image characteristics cannot be fully utilized in the prior art and thus restricts the embedding performance

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