CN106485644A - A kind of video zero watermarking generation method of resist geometric attackses and device - Google Patents
A kind of video zero watermarking generation method of resist geometric attackses and device Download PDFInfo
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- CN106485644A CN106485644A CN201610885093.XA CN201610885093A CN106485644A CN 106485644 A CN106485644 A CN 106485644A CN 201610885093 A CN201610885093 A CN 201610885093A CN 106485644 A CN106485644 A CN 106485644A
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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
- G06T1/005—Robust watermarking, e.g. average attack or collusion attack resistant
- G06T1/0064—Geometric transfor invariant watermarking, e.g. affine transform invariant
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Abstract
The invention provides a kind of video zero watermarking generation method of resist geometric attackses and device, including：The step of extracting the key frame images in video by the frame of pixels method of average or unit；Key frame images are processed, the low frequency sub-band of key frame images after process is carried out singular value decomposition, the step of singular value decomposition coefficient after being decomposed or unit；The step of watermarking images are generated after encryption watermark ciphertext or unit；XOR process is carried out to watermark ciphertext and singular value decomposition coefficient, forms zero watermarking, zero watermarking is registered to the step in third party database or unit.Present invention achieves not directly being embedded in digital watermarking in video, watermark is generated in database, and while video watermark robustness is improved, effectively withstand the geometric attacks such as translation, rotation, scaling.The contradiction between the watermark robustness and video definition occurred during conventional video digital watermark embedding can be balanced, does not change any video data.
Description
Technical field
The present invention relates to digital image processing techniques field, the video zero watermarking generation of more particularly to a kind of resist geometric attackses
Method and device.
Background technology
With the development of science and technology and the continuous progress of human lives, multimedia technology has obtained increasingly being widely applied,
The multimedia such as information such as video, audio frequency, image, text also plays more and more important role in our daily life.
Thus, the property right protection of video becomes the focus of people's research gradually.Digital watermark technology is that some identification informations are i.e. digital
Watermark, is directly embedded in the middle of digital carrier, but does not affect the use value of original vector, is also not easy to be perceived by the consciousness system of people
Or notice.By these hiding information in the carrier, confirmation creator of content, buyer, the concealed letter of transmission can be reached
Breath judges whether carrier the purpose such as is tampered.Digital watermarking is an important research direction of Information Hiding Techniques.
Zero watermarking has not obtained people to the new digital digital watermark that original video image data are modified as a kind of
Extensive concern.The principle of zero watermarking technology is：First characterize characteristics of image information extracted by algorithm, then with
The identification information of author is combined by the mode of regulation with the information, forms the watermark information of a registration, finally by the watermark letter
Breath is registered in third-party intellectual property information database.As the digital watermarking in zero watermarking scheme is registered with third party
Digital watermark information database in, rather than be embedded in Digital Media, therefore also just there is no Digital Media Quality Down
Or watermark amount is the problems such as be restricted.When having digital carrier works to need to make copyright to judge, first by certain algorithmic approach
The characteristic quantity of works to be detected is extracted, then by the identification information of original author with the works characteristic quantity for extracting with former regulation algorithm
Mode is combined, and obtains a new watermark information, judges to note in this watermark information and third party's intellectual property information database
The similitude of the watermark information of volume, if similitude is minimum, then it is assumed that works to be detected are not the former works for registering, otherwise recognize
For being the works of original author.
But, development is ripe not enough at present for zero watermarking technology, and video is used as a kind of complicated its variability of communications media
Very big, though attacker only destination multimedia is done slight almost ND geometric attack as rotated, translation, scaling,
Conversion etc.；Most of watermark detectors but can not correctly extract watermark information.How to resist geometric attack and remain this field
One of the greatest difficulty for being faced, and the focus of research.Therefore the video watermark process of research resist geometric attackses becomes research
Problem demanding prompt solution in difficult point in difficult point, and video watermark research.
Content of the invention
For solving above-mentioned technical problem, the present invention provides a kind of video zero watermarking generation method of resist geometric attackses and dress
Put, by can preferably reach and make video zero watermarking have resist geometric attackses to the process of key frame images and singular value decomposition
Effect；Achieve and be not directly embedded in digital watermarking in video, watermark is generated in database, and can not repaiied completely
Change the information of video.
For achieving the above object, the present invention provides technical scheme below：
On the one hand, the present invention provides a kind of video zero watermarking generation method of resist geometric attackses, and methods described includes as follows
Step：
Key frame images in video are extracted by the frame of pixels method of average；
The key frame images are processed, the low frequency sub-band of key frame images after process are carried out singular value decomposition,
Singular value decomposition coefficient after being decomposed；
Watermarking images are generated after encryption watermark ciphertext；
XOR process is carried out to watermark ciphertext and singular value decomposition coefficient, forms zero watermarking, zero watermarking is registered to the 3rd
In party database.
The step of key frame images that is extracted by the frame of pixels method of average in video, is included：
When several key frame images are chosen, using the similarity between frame as measurement foundation, key frame images are found every time
All ensure between each key frame images with minimum similarity degree, so that key frame images carry maximum fault information.
The low frequency sub-band of key frame images after process is carried out singular value decomposition and obtains by described key frame images are processed
To decompose after singular value decomposition coefficient the step of include：
Video Key two field picture is normalized, the normalized includes：Carry out respectively coordinate centralization,
X-shearing normalization, scaling normalization and rotational normalization；
Carry out contourlet conversion；
Low frequency sub-band is carried out the singular value decomposition of 8*8 block, obtains first singular value decomposition system after each piece of decomposition
Number.
Described include the step of watermarking images to be generated after encryption watermark ciphertext：
Binary bitmap scanning to be embedded is one-dimensional binary sequence, then spread processing is carried out to this sequence；Utilize
Logistic mapping generates binary chaotic sequence；Chaos sequence is carried out XOR process with the sequence after watermark spread spectrum, obtains water
Print ciphertext.
The frame of pixels method of average is to obtain the pixel value in video-frequency band on the predeterminated position of all frames, according to pixel value
Mean value is used as the standard for comparing；Wherein, by closest for predeterminated position pixel value described in video-frequency band mean value
Frame, as the key frame of the video-frequency band.
On the other hand, the present invention provides a kind of video zero watermarking generating means of resist geometric attackses, and described device includes：
Acquiring unit, for extracting the key frame images in video by the frame of pixels method of average；
Processing unit, for processing to the key frame images, the low frequency sub-band of key frame images after process is entered
Row singular value decomposition, the singular value decomposition coefficient after being decomposed；
Ciphering unit, for watermarking images to be generated after encryption watermark ciphertext；
Signal generating unit, for carrying out XOR process to watermark ciphertext and singular value decomposition coefficient, forms zero watermarking, by zero water
Print is registered in third party database.
The acquiring unit includes：
For when several key frame images are chosen, using the similarity between frame as measurement foundation, find every time crucial
Two field picture all ensures with minimum similarity degree between each key frame images, so that mould of the key frame images with maximum fault information
Block.
The processing unit includes：
For Video Key two field picture to be normalized, the normalized includes：Carried out in coordinate respectively
The heart, x-shearing normalization, scaling normalization and rotational normalization；Carry out contourlet conversion；Low frequency sub-band is entered
The singular value decomposition of row 8*8 block, obtains the module of first singular value decomposition coefficient after each piece of decomposition.
The ciphering unit includes：
It is one-dimensional binary sequence for scanning binary bitmap to be embedded, then spread processing is carried out to this sequence；
Mapped using Logistic and generate binary chaotic sequence；Chaos sequence is carried out XOR process with the sequence after watermark spread spectrum, is obtained
Module to watermark ciphertext.
The frame of pixels method of average is to obtain the pixel value in video-frequency band on the predeterminated position of all frames, according to pixel value
Mean value is used as the standard for comparing；Wherein, by closest for predeterminated position pixel value described in video-frequency band mean value
Frame, as the key frame of the video-frequency band.
As shown from the above technical solution, a kind of video zero watermarking generation method of resist geometric attackses that the present invention is provided and dress
Put, by key frame images are processed, key frame images are converted into unique canonical form to resist affine transformation simultaneously
The attack of the geometric transformations such as translation, rotation, scaling can effectively be withstood；Then carry out singular value decomposition and can balance tradition
Contradiction between watermark robustness that video digital watermark occurs when embedded and video definition, and improving video watermark robust
While property, any video data is not changed.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for technology description is had to be briefly described, it should be apparent that, drawings in the following description are the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
These accompanying drawings obtain other accompanying drawings.
Fig. 1 is a kind of schematic flow sheet of the video zero watermarking generation method of resist geometric attackses that the present invention is provided；
Fig. 2 is a kind of structural representation of the video zero watermarking generating means of resist geometric attackses that the present invention is provided.
Specific embodiment
Purpose, technical scheme and advantage for making the embodiment of the present invention is clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, clear, complete description is carried out to the technical scheme in the embodiment of the present invention, it is clear that described embodiment is
The a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Zero watermarking has not obtained people to the new digital digital watermark that original video image data are modified as a kind of
Extensive concern.As the digital watermarking in zero watermarking scheme is registered with third-party digital watermark information database, and
It is not embedded in Digital Media, therefore just there is no Digital Media Quality Down or watermark amount yet.But,
Development is ripe not enough at present for zero watermarking technology, and video is very big as a kind of complicated its variability of communications media, and attacker is
Make only to do destination multimedia slight almost ND geometric attack and such as rotate, translate, scale, convert；Great majority
Watermark detector but can not correctly extract watermark information.How to resist geometric attack and remain the maximum faced by this field and be stranded
Difficulty, therefore studies in the difficult point that the video watermark process of resist geometric attackses becomes in Research Challenges, and video watermark research urgently
Problem to be solved.For solving the above problems, the following embodiments of the present invention propose a kind of video zero watermarking of resist geometric attackses
Generation method and device.
As shown in figure 1, a kind of video zero watermarking generation method of resist geometric attackses of present invention offer, including following step
Suddenly：
S101：Key frame images in video are extracted by the frame of pixels method of average；
In this step, when several key frames are chosen, using the similarity between frame as measurement foundation, find every time and close
Key frame all ensures between each key frame with minimum similarity degree, so that key frame carries maximum fault information；
The purpose for extracting key frame has two aspects：(1) theme of static representations video frequency program and main contents, rather than
Dynamic details.(2) color, texture and shape facility are extracted from key frame, using indexed as video frequency abstract database
Data source, without repeating to each picture.Therefore, key frame should be representative, in terms of not only should representing theme
Feature, should also regard the difference of feature and different.Therefore, once, typically remove repetition in the unspecific situation of representative feature
(or redundancy) frame.When several key frames are chosen, it is to pay the utmost attention to the not phase between key frame for the criterion of key frame extraction
Like property, i.e., using similarity between frame as measurement foundation, find key frame every time and all ensure that there is between each key frame minimum phase
Like spending, so that key frame carries maximum fault information.The frame of pixels method of average used herein is certain for taking all frames in a video-frequency band
Pixel value on position asks which to be averagely used as the standard for comparing, by this closest mean value of position pixel value in video-frequency band
Frame, used as the key frame of the video-frequency band.
S102：The key frame images are processed, the low frequency sub-band of key frame images after process is carried out singular value
Decompose, the singular value decomposition coefficient after being decomposed；
In this step, first Video Key two field picture is normalized, the normalized includes：Respectively
Carry out coordinate centralization, x-shearing normalization, scaling normalization and rotational normalization；Then contourlet change is carried out afterwards
Change, its low frequency sub-band is finally carried out the SVD (singular value decomposition) of 8*8 block, obtain first SVD system after each piece of decomposition
Number.
S103：Watermarking images are generated after encryption watermark ciphertext；
In this step, it is one-dimensional binary sequence binary bitmap to be embedded to be scanned, then this sequence is expanded
Frequency is processed；Mapped using Logistic and generate binary chaotic sequence；Chaos sequence is carried out XOR with the sequence after watermark spread spectrum
Process, obtain watermark ciphertext.
S104：XOR process is carried out to watermark ciphertext and singular value decomposition coefficient, forms zero watermarking, zero watermarking is registered to
In third party database.
Knowable to foregoing description, a kind of video Zero watermarking method video zero watermarking life of resist geometric attackses that the present invention is provided
Become method, one group of parameter is found using the not bending moment of image and can eliminate other transforming function transformation functions to impact that image is converted
Image normalization method, key frame images is converted into unique canonical form to resist affine transformation.Image normalization is caused
Image can resist the attack of geometric transformation, and it can find out those invariants in image.Contourlet is carried out afterwards again
Conversion and singular value decomposition can preferably reach the effect for making video zero watermarking have resist geometric attackses.And the method can
A kind of register method of the digital watermarking of high security is provided in the case of video information is not changed completely, and it does not affect watermark
The transparency, watermark also has higher robustness, preferably can apply in the copyright protection of video content, and this side
Method is stronger for the resist geometric attackses ability effect of video.
Further, present invention also offers a kind of video zero watermarking generating means of resist geometric attackses.As shown in Fig. 2
Assembly of the invention specifically includes following content：
Acquiring unit, for extracting the key frame images in video by the frame of pixels method of average；
Processing unit, for processing to the key frame images, the low frequency sub-band of key frame images after process is entered
Row singular value decomposition, the singular value decomposition coefficient after being decomposed；
Ciphering unit, for watermarking images to be generated after encryption watermark ciphertext；
Signal generating unit, for carrying out XOR process to watermark ciphertext and singular value decomposition coefficient, forms zero watermarking, by zero water
Print is registered in third party database.
The acquiring unit includes：
For when several key frame images are chosen, using the similarity between frame as measurement foundation, find every time crucial
Two field picture all ensures with minimum similarity degree between each key frame images, so that mould of the key frame images with maximum fault information
Block.
The processing unit includes：
For being normalized Video Key two field picture first, the normalized includes：Sat respectively
Mark centralization, x-shearing normalization, scaling normalization and rotational normalization；Then contourlet conversion is carried out afterwards, most
Low frequency sub-band is carried out the singular value decomposition of 8*8 block afterwards, obtains the mould of first singular value decomposition coefficient after each piece of decomposition
Block.
The ciphering unit includes：
It is one-dimensional binary sequence for scanning binary bitmap to be embedded, then spread processing is carried out to this sequence；
Mapped using Logistic and generate binary chaotic sequence；Chaos sequence is carried out XOR process with the sequence after watermark spread spectrum, is obtained
Module to watermark ciphertext.
Knowable to foregoing description, a kind of video zero watermarking generating means of resist geometric attackses that the present invention is provided, Ke Yishi
Directly digital watermarking is not embedded in video now, watermark is generated in database, so on the basis for not changing original video
On can overcome existing zero watermarking construct efficiency, and improve video watermark robustness while, effectively keep out
The geometric attack such as firmly translate, rotate, scaling.The watermark robustness that occurs during conventional video digital watermark embedding can be balanced and regarded
Contradiction between frequency definition, does not change any video data.
Above example is merely to illustrate technical scheme, rather than a limitation；Although with reference to the foregoing embodiments
The present invention has been described in detail, it will be understood by those within the art that：Which still can be to aforementioned each enforcement
Technical scheme described in example is modified, or carries out equivalent to which part technical characteristic；And these are changed or replace
Change, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. the video zero watermarking generation method of a kind of resist geometric attackses, it is characterised in that methods described comprises the steps：
Key frame images in video are extracted by the frame of pixels method of average；
The key frame images are processed, the low frequency sub-band of key frame images after process is carried out singular value decomposition, is obtained
Singular value decomposition coefficient after decomposition；
Watermarking images are generated after encryption watermark ciphertext；
XOR process is carried out to watermark ciphertext and singular value decomposition coefficient, forms zero watermarking, zero watermarking is registered to third party's number
According in storehouse.
2. method according to claim 1, it is characterised in that the key that is extracted by the frame of pixels method of average in video
The step of two field picture, includes：
When several key frame images are chosen, using the similarity between frame as measurement foundation, find key frame images every time and all protect
Demonstrate,prove between each key frame images with minimum similarity degree, so that key frame images carry maximum fault information.
3. method according to claim 2, it is characterised in that described key frame images are carried out processing will process after crucial
The step of low frequency sub-band of two field picture carries out the singular value decomposition coefficient after singular value decomposition is decomposed includes：
Video Key two field picture is normalized, the normalized includes：Coordinate centralization, x- are carried out respectively
Shearing normalization, scaling normalization and rotational normalization；
Carry out contourlet conversion；
Low frequency sub-band is carried out the singular value decomposition of 8*8 block, obtains first singular value decomposition coefficient after each piece of decomposition.
4. method according to claim 3, it is characterised in that described watermarking images are generated after encryption watermark ciphertext
The step of include：
Binary bitmap scanning to be embedded is one-dimensional binary sequence, then spread processing is carried out to this sequence；Utilize
Logistic mapping generates binary chaotic sequence；Chaos sequence is carried out XOR process with the sequence after watermark spread spectrum, obtains water
Print ciphertext.
5. the method according to claim 1-4 any one, it is characterised in that the frame of pixels method of average is to obtain video
Pixel value in section on the predeterminated position of all frames, the mean value according to pixel value are used as the standard for comparing；Wherein, will be described
The frame of the closest mean value of predeterminated position pixel value described in video-frequency band, used as the key frame of the video-frequency band.
6. video zero watermarking generating means of a kind of resist geometric attackses, it is characterised in that described device includes：
Acquiring unit, for extracting the key frame images in video by the frame of pixels method of average；
Processing unit, for processing to the key frame images, the low frequency sub-band of key frame images after process is carried out very
Different value is decomposed, the singular value decomposition coefficient after being decomposed；
Ciphering unit, for watermarking images to be generated after encryption watermark ciphertext；
Signal generating unit, for carrying out XOR process to watermark ciphertext and singular value decomposition coefficient, forms zero watermarking, zero watermarking is noted
Volume is in third party database.
7. device according to claim 6, it is characterised in that the acquiring unit includes：
For when several key frame images are chosen, using the similarity between frame as measurement foundation, key frame figure is found every time
As all ensureing with minimum similarity degree between each key frame images, so that module of the key frame images with maximum fault information.
8. device according to claim 7, it is characterised in that the processing unit includes：
For Video Key two field picture to be normalized, the normalized includes：Carry out respectively coordinate centralization,
X-shearing normalization, scaling normalization and rotational normalization；Carry out contourlet conversion；Low frequency sub-band is carried out 8*8
The singular value decomposition of block, obtains the module of first singular value decomposition coefficient after each piece of decomposition.
9. device according to claim 8, it is characterised in that the ciphering unit includes：
It is one-dimensional binary sequence for scanning binary bitmap to be embedded, then spread processing is carried out to this sequence；Utilize
Logistic mapping generates binary chaotic sequence；Chaos sequence is carried out XOR process with the sequence after watermark spread spectrum, obtains water
The module of print ciphertext.
10. the device according to claim 6-9 any one, it is characterised in that the frame of pixels method of average is to obtain to regard
Pixel value in frequency range on the predeterminated position of all frames, the mean value according to pixel value are used as the standard for comparing；Wherein, by institute
The frame of the closest mean value of predeterminated position pixel value described in video-frequency band is stated, as the key frame of the video-frequency band.
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