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Universal digital image invisible information detecting method

A technology of information detection and digital image, applied in character and pattern recognition, instruments, computer components, etc., can solve problems such as limited or invalid, low detection effect

Inactive Publication Date: 2006-02-22
SHANGHAI NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0010] The technical problem to be solved by the present invention is to solve the shortcomings of low or limited or ineffective detection effects of the existing invisible information detection technology; to provide a general digital image invisible information detection method, which can be used in digital images. A Steganographic Algorithm for Detection of Hidden Invisible Information

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Embodiment Construction

[0100] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0101] As shown in Figure 1, the numerical representation of the Wiener filter is shown in the attached Figure 1a As shown, the atrophy method of soft and hard thresholds is respectively given by Figure 1b with 1c express. The denoising of the image is actually the MAP estimation of the original image:

[0102] =argmax{lnP w (y|)+lnP w ()}

[0103] ∈R N

[0104] (1)

[0105] Suppose the image is x j ~N( x j , σ xj 2 ), the hidden information is w~N(0,σ w 2 I), use Wiener filter to get x j The MAP estimate of:

[0106] x ^ = y ^ + U ‾ x 2 σ w 2 ...

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Abstract

This invention discloses one general digital image invisible information testing method, wherein, the original images without invisible information is different to the one with images through quantities attack of varying degrees of statistics variable. The method uses the wavelet analysis system statistic variable as training sample and uses one kind of vector as divider to identify the multiple invisible images.

Description

technical field [0001] The invention relates to a hidden information identification method, more specifically, to a general digital image hidden information detection method using a class of support vector machines as a classifier. Background technique [0002] Information hiding technology is to hide secret information in other media, and realize the transmission of secret information through the transmission of media. Its biggest feature is that the carrier containing the hidden information is the same as the ordinary carrier in appearance, and does not indicate the existence of important information. Therefore, the hidden secret information is also called "invisible information". Information hiding technology includes steganography (Steganography) and digital watermarking (Digital Watermarking) technology. Digital watermarking technology is mainly used for anti-counterfeiting and copyright protection, while steganography can be used for secret communication, which belong...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
Inventor 黄继风林家骏
Owner SHANGHAI NORMAL UNIVERSITY
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