CN110309632A - Zero watermarking algorithm based on multichannel transform domain feature - Google Patents
Zero watermarking algorithm based on multichannel transform domain feature Download PDFInfo
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- 238000010276 construction Methods 0.000 claims abstract description 16
- 230000009466 transformation Effects 0.000 claims abstract description 5
- 239000000284 extract Substances 0.000 claims abstract description 4
- 238000000605 extraction Methods 0.000 claims abstract description 3
- 238000001514 detection method Methods 0.000 claims description 8
- 239000011159 matrix material Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000005192 partition Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 5
- 230000007246 mechanism Effects 0.000 abstract description 3
- 230000002123 temporal effect Effects 0.000 abstract description 3
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 238000007906 compression Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
- G06F21/16—Program or content traceability, e.g. by watermarking
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T1/00—General purpose image data processing
- G06T1/0021—Image watermarking
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Abstract
The present invention relates to a kind of zero watermarking algorithms based on multichannel transform domain feature, belong to Information Hiding Techniques field.The present invention is acted on using the energy accumulating of DWT, DCT, SVD transformation, by frequency domain characteristic image, based on multiple transformed coefficients to construct feature watermark, to improve the robustness of algorithm.The present invention is using the coefficient in transform domain in three channels of color image as the latent structure watermark of image；Chaos encryption is carried out to the watermark comprising copyright information, and saves key involved in watermark encrypting process；When image is disputed on, extracts the feature watermark of dispute image and the zero watermarking in Third Party Authentication mechanism carries out xor operation, determine watermark bit using ballot decision, recycle key pair encryption watermark that extraction copyright information is decrypted.The present invention uses more stable coefficient in transform domain, distinguishes construction feature watermark from three channels, determines encrypted watermark by turn using temporal voting strategy to the watermark that three channels are extracted when detecting, improve the robustness of algorithm.
Description
Technical field
The present invention relates to a kind of zero watermarking algorithms based on multichannel transform domain feature, belong to Information Hiding Techniques field.
Background technique
With the fast development of information technology, various network multimedia informations service to have obtained to develop on a large scale very much, these information
Service is while bringing convenient, also to the threat of the legitimate rights and interests composition of information owner.Therefore, people use number
Word digital watermark protects the copyright of multimedia messages, and digital watermarking refers to the insertion random sequence, all token in copyright
The copyright informations such as will and subscriber identity information realize the effective protection to digital copyright.However, this traditional digital water
Being printed on a very big defect is exactly that invisibility and robustness can not get both.
Zero watermarking realizes copyright protection by extracting latent structure watermark from original image, solves the invisible of watermark
Property, because zero watermarking does not need for any information to be embedded into original image, the robustness that need to only improve watermark can solve to pass
System digital watermarking invisibility and robustness can not get both contradiction.Zero watermarking is believed what the image copyright owner provided containing copyright
Breath or user identity as original watermark by feature watermark and include copyright using the latent structure feature watermark of original image
The original watermark of information generates zero watermarking, and zero watermarking is registered in the intellectual property data library of third party authoritative institution.When
When dispute over copyright occurs, zero watermarking is taken out from Third Party Authentication mechanism, and extract feature watermark, Jin Erti from dispute image
The watermark comprising copyright information is taken out, the ownership of copyright is determined with this.
In order to improve the robustness of zero watermarking algorithm, Ta Minh Thanh proposes zero water of two kinds of view-based access control models mapping
India side case, is decomposed in conjunction with QR and dct transform generates feature watermark, to common attack robustness with higher, but will figure
As being transformed into yuv space only with luminance component, the feature of image is not made full use of；Xiong Xiangguang proposes sky
Domain color image Robust Zero watermarking algorithm, since airspace coefficient is vulnerable to interference, algorithm is for rotation attack poor robustness.It is above-mentioned
Although algorithm can resist common attack to a certain extent, also there is certain limitation.
Summary of the invention
The present invention, in order to overcome the shortcomings of existing algorithm, establishes one kind on the basis of all kinds of zero watermarking algorithms of synthesis
Zero watermarking algorithm based on multichannel transform domain feature.The present invention is acted on using the energy accumulating of DWT, DCT, SVD transformation, is passed through
Frequency domain characteristic present image, based on multiple transformed coefficients to construct feature watermark, to improve the robustness of algorithm.
In order to achieve the above objectives, the technical solution of the present invention is as follows:
A kind of zero watermarking algorithm based on multichannel transform domain feature, includes the following steps:
Step 1: using characteristics of image construction feature watermark, the transform domain system in three channels of color image is utilized when construction
Number.The low-frequency approximation subgraph of original image is divided into tri- channels R, G, B in RGB color, to the picture number in each channel
According to not overlap partition is carried out, each sub-block level-one DWT is converted, obtained low frequency block carries out dct transform and SVD is decomposed.It will be every
The maximum singular value of one sub-block constitutes the dilute coefficient matrix of singular value, by comparing every piece of maximum singular value and singular value coefficient matrix
The size relation of mean value generates feature watermark.
Step 2: carrying out chaos encryption to the original watermark comprising copyright information, and save the correlation that encrypted watermark is related to
Key.The feature watermark that the first step is generated carries out three channel separations, then obtains respectively at the watermark progress xor operation of encryption
To the zero watermarking of registration, zero watermarking is registered in the intellectual property data library of third party authoritative institution.
Step 3: carrying out the detection of zero watermarking when dispute over copyright occurs for image, the feature watermark of dispute image is extracted, it will
The feature watermark of extraction three channels corresponding with the zero watermarking registered in Third Party Authentication mechanism carry out xor operation, theoretical
On obtain 3 encrypted watermarks.For the robustness for improving algorithm, 3 obtained encrypted watermarks are determined by turn using ballot decision
The copyright information for including in watermark to extract is decrypted by key pair encryption watermark for watermark bit.
The utility model has the advantages that
The method that this method is combined in construction feature watermark by DWT, DCT, SVD, from R, G, B tri- of color image
Transform domain feature is repeatedly extracted in a channel, a degree of can solve to attack for cromogram common compression, filtering etc.
Not exactly the same problem is influenced caused by the different channels of picture；In the detection of zero watermarking, to the water in three obtained channel
Print obtains watermark bit using ballot decision, further improves the robustness of algorithm.
Detailed description of the invention
Fig. 1 is the construction flow chart of transform domain feature watermark；
Fig. 2 is original watermark encryption flow figure；
Fig. 3 is construction zero watermarking flow chart；
Fig. 4 is zero watermarking detection process flow chart.
Specific embodiment
The invention discloses a kind of zero watermarking algorithm based on multichannel transform domain feature, algorithm facilitates raising zero from two
The robustness of watermark.On the one hand, the more stable coefficient in transform domain of use distinguishes construction feature watermark from three channels；It is another
Aspect determines encrypted watermark using temporal voting strategy to the watermark extracted from three channels when detection by turn.
The specific embodiment that develops simultaneously with reference to the accompanying drawing is described further this method:
Embodiment:
Step 1: the construction of feature watermark.Fig. 1 show the flow chart of construction feature watermark, the description of specific algorithm step
It is as follows:
101, using Haar filter, level-one wavelet decomposition is carried out to original image I, obtaining size is's
Low-frequency approximation subgraph ILF；
102, divide R, G, B tri- channel processing low-frequency approximation subgraph ILF, obtainI_R, I_G, I_B of size；
103, the feature watermark M that identical processing constructs N × N size respectively is carried out to three channelsR、MGAnd MB, below
M is constructed with the channel GGFor introduce construction process:
(1) I_G obtained to the channel G, carrying out block size isNot overlap partition, obtain block matrix Blc_
Gij, wherein i, j=1 ... N；
(2) to each piece of Blc_GijAfter carrying out level-one wavelet transformation, discrete cosine transform is carried out, transformation coefficient is carried out again
Singular value decomposition takes maximum singular value s；
(3) s obtained with every piece constitutes matrix { S_Gij, and the mean value gave of calculating matrix；
(4) the feature watermark M in the channel G is constructedG, wherein
104, MR, MG, MB are generated into the feature of image I as the data in tri- channels R, G, B of feature watermark M
Watermark M.
Step 2: the generation of encrypted watermark.Fig. 2 show the flow chart of construction feature watermark, to including that copyright information is former
Beginning watermark progress chaos encryption arrives encrypted watermark CW, and the association key being involved in saves.
Step 3: the construction of zero watermarking.Fig. 3 show zero watermarking construction flow chart, first by feature watermark M carry out R,
G, the isolated M in tri- channels BR、MG、MB, then xor operation is carried out with encrypted watermark CW respectively, obtain OR、OG、OB, it may be assumed that
And then obtain zero watermarking O.
Step 4: the detection of zero watermarking.Fig. 4 show the flow chart of detection zero watermarking, and specific algorithm step is described as follows:
401, according to the construction process of feature watermark, the feature watermark M of image to be detected R, G, channel B are constructedR、MG、
MB；
402, O is isolated from R, G of registration watermark O, channel BR、OG、OB；
403, three channels are constructed into W respectivelyR、WG、WB, it may be assumed that
404, watermark bit is calculated using temporal voting strategy decision, according to the construction process of watermark, WR, WG, WB are in same pixel
Theoretical value at position is equal, but image to be detected after attack can change.Therefore according to ballot decision theory,
Judge the watermark bit of P position i row j column, wherein i, j=1 ... N.Regard three channels as three voters, each channel mentions
The watermark bit of taking-up, the watermark bit at the P of position are considered its ballot, and the poll in three channels adds up, more than half (to be greater than
2) then think that watermark bit herein is 1, otherwise, then it is assumed that be 0, it may be assumed that
405, the watermark of the key pair encryption provided according to user is decrypted, the watermarking images W ' after being decrypted.
Claims (4)
1. a kind of zero watermarking algorithm based on multichannel transform domain feature, which comprises the steps of:
Step 1: with the coefficient in transform domain feature watermark in three channels of color image；
Step 2: carrying out chaos encryption to the original watermark comprising copyright information, and save the association key that encrypted watermark is related to；
Step 3: carrying out the detection of zero watermarking when dispute over copyright occurs for image, the feature watermark of dispute image is extracted, and the
Zero watermarking in tripartite certification authority carries out xor operation, determines water by turn using ballot decision to 3 obtained encrypted watermarks
Position is printed, encrypted watermark is decrypted and extracts copyright information in watermark.
2. a kind of zero watermarking algorithm based on multichannel transform domain feature as described in claim 1, which is characterized in that utilize figure
As latent structure feature watermark, the coefficient in transform domain in three channels of color image is utilized when construction.The low frequency of original image is close
It is divided into tri- channels R, G, B in RGB color like subgraph, not overlap partition is carried out to the image data in each channel, to every
One sub-block level-one DWT transformation, obtained low frequency block carries out dct transform and SVD is decomposed.The maximum singular value of each sub-block is constituted
The dilute coefficient matrix of singular value generates spy by comparing the size relation of every piece of maximum singular value and singular value coefficient matrix mean value
Levy watermark.
3. a kind of zero watermarking algorithm based on multichannel transform domain feature as described in claim 1, which is characterized in that comprising
The original watermark of copyright information carries out chaos encryption, and saves the association key that encrypted watermark is related to.The spy that the first step is generated
It levies watermark and carries out three channel separations, then carry out the zero watermarking registered of xor operation respectively at the watermark of encryption, by zero water
Print is registered in the intellectual property data library of third party authoritative institution.
4. a kind of zero watermarking algorithm based on multichannel transform domain feature as described in claim 1, which is characterized in that work as image
The detection for carrying out zero watermarking when dispute over copyright occurs, extracts the feature watermark of dispute image, by the feature watermark of extraction with the
Corresponding three channels of the zero watermarking registered in tripartite certification authority carry out xor operation, theoretically obtain 3 encrypted watermarks.For
The robustness for improving algorithm determines watermark bit using ballot decision to 3 obtained encrypted watermarks by turn, passes through key pair encryption
The copyright information for including in watermark to extract is decrypted in watermark.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111984943A (en) * | 2020-07-29 | 2020-11-24 | 南京信息工程大学 | DWT-SVD digital watermarking method based on artificial bee colony algorithm |
| CN113658030A (en) * | 2021-08-18 | 2021-11-16 | 辽宁工程技术大学 | Low false alarm zero watermark algorithm based on regional XOR |
| CN116522289A (en) * | 2023-01-17 | 2023-08-01 | 山东青橙视联信息科技有限公司 | Multi-view image copyright protection method, device and medium based on blockchain |
-
2019
- 2019-06-28 CN CN201910570978.4A patent/CN110309632A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111984943A (en) * | 2020-07-29 | 2020-11-24 | 南京信息工程大学 | DWT-SVD digital watermarking method based on artificial bee colony algorithm |
| CN111984943B (en) * | 2020-07-29 | 2023-08-22 | 南京信息工程大学 | DWT-SVD digital watermarking method based on artificial bee colony algorithm |
| CN113658030A (en) * | 2021-08-18 | 2021-11-16 | 辽宁工程技术大学 | Low false alarm zero watermark algorithm based on regional XOR |
| CN116522289A (en) * | 2023-01-17 | 2023-08-01 | 山东青橙视联信息科技有限公司 | Multi-view image copyright protection method, device and medium based on blockchain |
| CN116522289B (en) * | 2023-01-17 | 2024-03-08 | 山东青橙数字科技有限公司 | Multi-view image copyright protection method, device and medium based on blockchain |
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