Reversible information hiding method based on improved pixel local complexity calculation and multi-peak embedding

Abstract

The invention discloses a reversible information hiding method based on improved pixel local complexity calculation and multi-peak embedding. The method comprises the following steps: carrying out overflow/underflow preprocessing on an original image; dividing the image into a Blue sub-image and a Blank sub-image, dividing pixel positions of the sub-images, and calculating a prediction error of a target pixel by using a diamond predictor; calculating the pixel texture degree of the Blue/Blank sub-images to obtain the texture degree of an adjacent pixel of the target pixel, and then calculating the local complexity of the target pixel by using the texture degree of the adjacent pixel; according to a prediction error histogram of each sub-image, selecting three peak points and two zero points closest to the maximum peak point and the minimum peak point, then adaptively selecting the peak points according to the secret information length, and preferentially carrying out information embedding on pixels with low local complexity in each sub-image; carrying out secret information extraction and image restoration. According to the invention, the image embedding capacity is improved, and the embedding distortion is reduced.

Description

technical field [0001] The invention belongs to the technical field of information security and digital communication, in particular to a reversible information hiding method based on improved pixel local complexity calculation and multi-peak embedding. Background technique [0002] Today, vast amounts of information are transmitted in digital form over distributed computer networks. Digital communication on the Internet has made great progress, and preventing private information from being tampered with or stolen has become one of the hot issues that governments and industries pay special attention to. Therefore, it is urgent to solve the problem of information security, and information hiding technology is one of the effective ways to ensure the security of digital information. Digital watermarking, steganography, etc. are all effective information hiding techniques to protect the security of digital information (also called watermarking). For most information hiding alg...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the fact that the existing reversible information hiding algorithm based on reducing the invalid translation pixels in the histogram translation does not make full use of the correlation between pixels, so that the calculation result of the pixel complexity is not accurate enough, resulting in no obvious reduction of image distortion and image redundancy. The utilization rate of redundancy is low, and the embedding capacity needs to be further improved. A reversible information hiding method based on improved pixel local complexity calculation and multi-peak embedding is proposed, aiming at improving image embedding capacity and reducing embedding distortion. In order to achieve a good balance between image visual quality and embedding capacity, better meet the needs of practical applications

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