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Image reversible information hiding method based on PVO and 3D mapping modification

An information hiding and image technology, applied in image data processing, image data processing, instruments, etc., can solve the problem of limited embedding ability, achieve the effect of improving embedding ability, reducing distortion, and good PSNR

Active Publication Date: 2021-07-09
杭州电子科技大学上虞科学与工程研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ability to embed is very limited

Method used

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  • Image reversible information hiding method based on PVO and 3D mapping modification
  • Image reversible information hiding method based on PVO and 3D mapping modification
  • Image reversible information hiding method based on PVO and 3D mapping modification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0124] Taking 8bits grayscale image as an example, the implementation process of the image reversible information hiding method based on PVO and 3D mapping modification is as follows:

[0125] S11, the original image I is divided into several non-overlapping image blocks, each image block adopts the size of p×q, and each image block has n pixels (x 1 , x 2 ,...,x n ); if there are pixels with values ​​of 255 and 0 in the image block, they are modified to 254 and 1 respectively and the image block is marked as 1, and other image blocks that do not contain 255 and 0 value pixels are marked as 0, these marks will be embedded in the image as part of the secret data as additional information. In this embodiment, the size of each image block is 2 pixels, and each image block has n=4 pixels (x 1 , x 2 , x 3 , x 4 ).

[0126] S12, to n pixels (x) of each image block of the original image I 1 , x 2 ,...,x n ) to sort the pixel values ​​to get the sequence x σ(1) ≤x σ(2) ≤.....

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Abstract

The invention provides an image reversible information hiding method based on PVO and 3D mapping modification. According to the method, the pixel value sequence and the pixel positions are considered at the same time, wherein the minimum value can be used for predicting the maximum three pixels, a prediction error triple is obtained, and then embedding or displacement of secret data is carried out according to a three-dimensional state conversion diagram. Then, the maximum value is used for predicting three minimum pixels to obtain a prediction error triple, and then embedding or displacement of secret data is carried out according to a three-dimensional state transition diagram. By skillfully designing a three-dimensional state transition diagram for predicting an error triad, the scheme proposed by the present invention can embed secret data or expand without embedding by modifying only a single entry of the triad. Experimental results show that the embedding capability of a PVO-based scheme is obviously improved, and distortion caused by embedding is further reduced.

Description

technical field [0001] The invention studies the field of image content security of information security, and proposes an image reversible information hiding method based on PVO and 3D mapping modification. Background technique [0002] With the rapid development of computer technology and network technology, the confidentiality and security of data transmission become more and more important. To make data transmission more secure, researchers have developed various encryption algorithms that can convert data into unrecognizable ciphertext. To make ciphertext less obvious in transmission, researchers have developed various data hiding algorithms to embed secret data into digital objects, such as images, for transmission. Since the modified digital object with confidential information is very similar to the original digital object, other people will not pay too much attention to the information, thereby achieving the effect of confidentiality. [0003] There are two main ty...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
CPCG06T1/0021
Inventor 池衡晓张靖群洪集辉张真诚周陈倩朱伟康涂克克
Owner 杭州电子科技大学上虞科学与工程研究院有限公司