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Universal blind checking method for invisual image in frequency zone

A technology of steganography detection and frequency domain, applied in the information field, can solve problems such as inability to detect steganography in the frequency domain

Inactive Publication Date: 2005-12-28
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology only hides images in the spatial domain and cannot be used for steganographic detection in the frequency domain.

Method used

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  • Universal blind checking method for invisual image in frequency zone
  • Universal blind checking method for invisual image in frequency zone
  • Universal blind checking method for invisual image in frequency zone

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Embodiment Construction

[0019] In conjunction with the content of the present invention, the following specific implementation methods are further provided:

[0020] Such as figure 1 As shown, the detection process of the present invention: first, do DCT transformation to the spatial domain image, and obtain the difference histogram h[n] of the coefficients of adjacent points in the DCT domain in the horizontal direction; second, do the difference histogram h[n] DFT transform to obtain its amplitude spectrum |H[k]|; thirdly, judge whether its amplitude spectrum has a local energy minimum in the low frequency region, and whether there is an upward trend from low frequency to intermediate frequency, if it matches, the image is hidden in DCT domain image, otherwise it is an unhidden image.

[0021] Taking the standard BMP color Lena image of 512×512×3 as an example, construct a lena-hide with embedded information and an original image lena, and explain them respectively. The following is lena( figur...

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PUM

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Abstract

A blind detection method of implicit image on frequency domain includes transforming space domain to be DCT domain, deriving out differential histogram in DCT domain and its amplitude spectrum as well as analyzing it, carrying out implicit writing detection according to the lowest and the highest number and position of spectrum energy, presenting trend to go down for non-implicit writing DCT domain image and DCT spectrum from low frequency to intermediate frequency but presenting trend to go up for implicit writing image spectrum at the same position .

Description

technical field [0001] The invention relates to a method in the field of information technology, in particular to a general blind detection method for steganographic images in the frequency domain. Background technique [0002] Information hiding technology is an important aspect in the field of information security, mainly including two aspects of hiding technology and watermarking technology. Stealth technology is generally used in secure communication, that is, to hide the important information to be transmitted in the carrier, making it difficult to be detected. Since stealth technology can also be used by criminals to transmit secret information through the Internet, organize terrorist attacks, etc., the research on steganalysis technology has become more and more important. Steganalysis technology refers to the ability to detect, attack and extract hidden information. Technology. The carrier of stealth technology can be text, image, audio, video, etc. Because in the ...

Claims

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Application Information

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IPC IPC(8): G06T1/00
Inventor 陈丽亚钱萍李建华汪张昱李翔
Owner SHANGHAI JIAO TONG UNIV