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Non-additive distortion JPEG image steganography method based on block effect

A block effect and image technology, applied in image data processing, image data processing, instruments, etc., to achieve the effect of improving security and enhancing anti-detection ability

Active Publication Date: 2020-01-24
WUHAN UNIV
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Problems solved by technology

[0014] Aiming at the problems existing in the existing adaptive steganographic algorithm based on additive distortion cost, the present invention realizes a non-additive distortion cost based steganographic algorithm based on block effect

Method used

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  • Non-additive distortion JPEG image steganography method based on block effect
  • Non-additive distortion JPEG image steganography method based on block effect
  • Non-additive distortion JPEG image steganography method based on block effect

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Embodiment Construction

[0047] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0048] The blockiness evaluation method gives an evaluation value for the strength of the blockiness of the JPEG image. This method uses a measurement method capable of individually checking local blockiness. The flow of the method is as follows.

[0049] like figure 1 As shown, when evaluating local blockiness, the original image is divided into sub-blocks of size 8*8. When evaluating the blockiness of the 8*8 sub-block A, four sub-blocks around it need to be used, which are marked as B, C, D, and E respectively. Among them, the two sub-blocks B and D are the adjacent sub-blocks of the sub-block A in the horizontal direction, and the two sub-blocks C and E are the adjacent sub-blocks of the block A in the vertical direction. For any 8*8 block A in the image, the difference value B between horizontal blocks and its adjacent ...

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Abstract

The invention discloses a non-additive distortion JPEG image steganography method based on a block effect. Based on the blocking effect of a JPEG image, the invention provides a method for guiding thedistortion cost to be adjusted towards the direction of reducing the blocking effect. Through combination of blocking effect evaluation and local distortion cost adjustment, improvement of an existing mainstream JPEG steganography algorithm is realized, and detection of current most advanced high-dimensional steganography analysis features is resisted. The method has the advantages that the current mainstream JPEG steganography algorithm is based on steganography of additive distortion cost and is easily detected by high-dimensional steganography analysis features, and the correlation betweenimage elements is kept based on the blocking effect from the perspective of non-additive distortion cost, so that the steganography concealment and safety are improved. The method has high universality and is beneficial to improving the safety of the JPEG steganography algorithm.

Description

technical field [0001] The invention relates to the technical field of multimedia security and digital media processing, in particular to the technical field of steganography algorithm for embedding secret information on images. Background technique [0002] Modern steganography is a technology that uses digital media for secret communication, and its goal is to hide secret information in digital media such as images, audio, and video. With the popularity of the Internet and the ease of dissemination of pictures, digital images have become a hidden carrier that is easy to obtain. Among them, JPEG images, as a widely used image format, have received extensive attention. Various steganographic algorithms based on JPEG images There are endless. However, with the introduction of steganalysis algorithms based on high-dimensional features, these algorithms can effectively detect traditional JPEG steganographic algorithms, which poses a severe challenge to JPEG image steganographi...

Claims

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Application Information

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IPC IPC(8): G06T1/00
CPCG06T1/0021
Inventor 王丽娜翟黎明陆宇博吴俊锜
Owner WUHAN UNIV
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