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JPEG image reversible information hiding method

An information hiding and image technology, which is applied in image communication, digital video signal modification, electrical components, etc., can solve the problem of file size increase, achieve the effect of reducing visual distortion, reducing visual distortion, and optimizing embedding performance

Active Publication Date: 2020-03-27
SOUTH CHINA UNIV OF TECH
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  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and provide a method for reversible information hiding of JPEG images, which can effectively reduce the visual distortion and increase in file size of encrypted JPEG images

Method used

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  • JPEG image reversible information hiding method
  • JPEG image reversible information hiding method
  • JPEG image reversible information hiding method

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Embodiment 1

[0043] Such as Figure 1-3 As shown, a JPEG image reversible information hiding method for optimizing embedding performance includes the following steps:

[0044] S1: Input an original JPEG grayscale image of 512x512, perform entropy decoding on it to obtain quantized DCT coefficients and quantization table;

[0045] The steps of entropy decoding the grayscale image are specifically:

[0046] S1-1: read the JPEG file header, obtain the JPEG file encoding table (including quantization table and Huffman table) and image size information;

[0047] S1-2: Read the data segment of the JPEG file, use the Huffman table to restore the original image data stream, and finally construct an 8×8 DCT block according to the data arrangement rules.

[0048] S2: Use the AC coefficient with an absolute value of 1 as the secret information embedding carrier. In the histogram translation embedding scheme, the AC coefficient with a value of 0 remains unchanged during information embedding, and ot...

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Abstract

The invention discloses a JPEG image reversible information hiding method. The method includes: carrying out entropy decoding on the original JPEG image, converting DCT image, and obtaining a quantized DCT coefficient and a quantized table; calculating an embedded distortion value of each DCT block; carrying out information embedding on the DCT block, wherein the embedding sequence is that embedding distortion values are embedded from small to large; and carrying out entropy coding on the modified DCT coefficient, and obtaining a secret-carrying JPEG image. According to the method, the DCT blocks are selected and reversible information hiding is carried out according to distortion value sorting, so that the visual distortion of the secret-carrying JPEG image is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of multimedia information security, in particular to a JPEG image reversible information hiding method. Background technique [0002] Data hiding technology hides secret information in an open media carrier to obtain a secret carrier, and realizes the safe transmission of secret information through the transmission of the secret carrier. Reversible information hiding is an emerging information security technology. It can not only extract secret information, but also restore and reconstruct the original carrier. Its research is mainly used in occasions where the original carrier is not allowed to be distorted, such as military communications and court forensics. , medical images and copyright protection and other fields. [0003] As an important branch of information hiding, image information hiding has been developed for many years, and the related research has also received more attention. JPEG is a lossy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/467H04N19/625
CPCH04N19/467H04N19/625
Inventor 何军辉潘心炉
Owner SOUTH CHINA UNIV OF TECH
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