CN107027020B - A kind of time slot scrambling of multi-view image - Google Patents
A kind of time slot scrambling of multi-view image Download PDFInfo
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- CN107027020B CN107027020B CN201710269767.8A CN201710269767A CN107027020B CN 107027020 B CN107027020 B CN 107027020B CN 201710269767 A CN201710269767 A CN 201710269767A CN 107027020 B CN107027020 B CN 107027020B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/10—Processing, recording or transmission of stereoscopic or multi-view image signals
- H04N13/106—Processing image signals
- H04N13/15—Processing image signals for colour aspects of image signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/10—Processing, recording or transmission of stereoscopic or multi-view image signals
- H04N13/194—Transmission of image signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
- H04N21/2347—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving video stream encryption
Abstract
The present invention relates to 3D display technical fields, more particularly to and disclose a kind of time slot scrambling of multi-view image, include the following steps：Part rgb pixel unit is converted into YCbCr in former multi-view image, forms transfer image acquisition；Each sub-pixel is mapped using position random number array in transfer image acquisition, generates aliased pixels image；Image restores aliased pixels image when playing, and reducing end is reduced into transfer image acquisition by previous position counter push away of random number array mapping mode；YCbCr pixel units in transfer image acquisition are converted into rgb pixel unit according to previous pixel conversion information, merging obtains former multi-view image.A kind of time slot scrambling of multi-view image of the present invention, part rgb pixel unit is converted to YCbCr pixel units, and each sub-pixel is individually obscured stochastic and dynamic position, with obscuring degree height, it is difficult to the advantage cracked, security performance is good, substantially increases the safety of multi-view image data transmission.
Description
Technical field
The present invention relates to 3D display technical field more particularly to a kind of time slot scramblings of multi-view image.
Background technology
The more and more ordinary entrance people’s lives of 3D display technology, existing 3D effect on the market are broadly divided into two kinds,
One is being watched by external tool, such as 3D glasses etc, 3D sense organs are obtained, one is the viewings of direct bore hole.But it is above-mentioned
No matter which kind of scheme, is required for by the display device of 3D and the 3D signals Jing Guo the transformation of ownership, only 3D signals and 3D display device
When matching, 3D effect could be realized, reach perfect 3D effect.
Existing signal is arranged frame by frame by image, needs each frame image to turn at multi-view image by the transformation of ownership
The multi-view image that system is completed needs to be delivered to 3D display device.In the art, 3D display device is easy to quilt once listing
Reverse engineering is imitated, and in order to improve the competitiveness in market, row's figure mode of multi-view image is just particularly important.
Pixel on 3D display device is arranged using 3 sub-pixels of RGB as a pixel unit array, corresponding to regard more
Point image is also to be arranged using 3 sub-pixels of RGB as a pixel unit array.Corresponding different 3D display device, multiple views
Row's figure of image is also inconsistent.In order to increase confidentiality and safety, the pixel in multi-view image after the transformation of ownership can be encrypted
After transmit, then decrypt multi-view image, and shown in 3D display device.
To prevent row's figure of multi-view image to be cracked, the common method of the prior art is the integer picture multi-view image
Element is generated according to random number array corresponding out of order obscures image.The shortcomings that this way is that obscure degree not high, it is easy to quilt
It cracks.
On this basis, need one kind obscure degree height, more stablize and be difficult to the method cracked come obscure with it is antialiasing
Image makes multi-view image be not easy the imitation that is decrypted, safer storage and transmission.
Invention content
In view of the problems of the existing technology, the present invention provide it is a kind of obscure degree is high, be difficult to crack prevent image
The method cracked.
For achieving the above object, the present invention adopts the following technical scheme that：
A kind of time slot scrambling of multi-view image is obscured former multi-view image by obscuring end and will be obscured by reducing end
Image restoring, it is characterised in that：Include the following steps：
1) obscure end and convert part rgb pixel unit in former multi-view image to YCbCr pixel units, form transition figure
Picture；
2) each pixel unit sub-pixel is mapped using position random number array in transfer image acquisition, generates new aliased pixels
Image；
3) image restores aliased pixels image when playing, and reducing end is mapped by the position random number array of step 2)
Counter push away of mode is reduced into transfer image acquisition；
4) according to the location information of the transformed pixel unit of step 1) by the YCbCr pixels of corresponding position in transfer image acquisition
Cell translation obtains former multi-view image at rgb pixel unit, merging.
This method propose it is a kind of new mixed based on RGB and YUV, and by the independent random number array mapping of three sub-pixels
The out of order method for obscuring image, the pixel unit after each group of mapping may contain rgb pixel unit or YcbCr pixel units
It is therein any one, bring prodigious difficulty to the anti-this method that pushes away is cracked.
Preferably, the position random number array mapping described in step 2) is predisposed at least one set, multi-view image is random
Selection one of which random number array mapping is obscured.One group of random number array mapping is randomly choosed to carry out time-domain image
Obscure, be difficult when cracking predefine be which kind of mode, it is possible to be substantially improved and crack difficulty.
Preferably, the first row of the first frame multi-view image of a video, which is added, implies control word, forward sight is worked as in control
The random number array of the multi-view image selection of frequency carries out mapping and reflection is penetrated.Such mode is not only difficult to crack, also relatively
Setting is simple, easy to operate.
Preferably, the first row of each frame multi-view image of a video, which is added, implies control word, present frame is controlled
Multi-view image selection random number array carry out mapping and reflection penetrate.Dynamic random is carried out for each frame multi-view image
The mapping of number array and reflection are penetrated, and are improved the complexity obscured, are also substantially increased and crack difficulty.
Preferably, in step 3), obscuring end makes the location information of the transformed pixel unit of step 1) and step 2)
Position random number array mapping mode is transferred to reduction of the reducing end for obscuring image.It can accurately know that pixel converts
Information and the mapping relations obscured, carry out solution and obscure.
Preferably, sending the reduction for being transmitted to reducing end for obscuring image by network or physical connection.It can be with
Suitable transmission mode is selected according to the principle of the convenience or more conducively secrecy of using area or client.
Preferably, at least 50% rgb pixel unit is converted into YCbCr pixel units in step 1).It can improve mixed
Confuse degree, raising cracks difficulty.
It is adopted preferably, converting part rgb pixel unit in former multi-view image to YCbCr pixel units in step 1)
With randomly selecting mode.More it is not easy to crack.
A kind of time slot scrambling of multi-view image of the present invention, YCbCr pixel lists are converted to by part rgb pixel unit
Member individually carries out random number array mapping, if random number array can be arranged based on the RGB and YUV each sub-pixels mixed
It does group and dynamic obfuscation can be carried out, have and obscure degree height, it is difficult to crack, the advantage that security performance is good, substantially increase more
The safety of viewpoint image data transmission.
Description of the drawings
Fig. 1 is 1 original image pixel schematic diagram of the embodiment of the present invention.
Fig. 2 is 1 transfer image acquisition pixel schematic diagram of the embodiment of the present invention.
Fig. 3 is that the embodiment of the present invention 1 obscures image pixel schematic diagram.
Fig. 4 is that the embodiment of the present invention 1 restores image mode schematic diagram.
Fig. 5 is implementation flow chart of the embodiment of the present invention 1 based on FPGA.
Specific implementation mode
With reference to Fig. 1-5, the present invention is described further with specific implementation mode.
Embodiment 1
A kind of time slot scrambling of multi-view image is obscured former multi-view image by obscuring end and will be obscured by reducing end
Image restoring includes the following steps：
1) former multi-view image is as shown in Fig. 1, totally 16 pixel units, and obscuring end will be 50% in former multi-view image
Rgb pixel unit is converted into YCbCr pixel units, i.e., by this 8 rgb pixel lists of 1,2,5,7,11,12,14,16 in attached drawing 1
Member is converted to YcbCr pixel units, and each rgb pixel unit or YCbCr pixel units are resolved into three sub-pixels, formed
Image is crossed, transfer image acquisition is as shown in Fig. 2, and pixel converts information storage；
2) each pixel unit sub-pixel is mapped using position random number array in transfer image acquisition, generates new aliased pixels
Image；Position random number array mapping at this time uses beta distribution random numbers generator, each corresponding sub-pixel to generate one
Then sub-pixel has been re-started arrangement by number according to the number of generation by rearranging from small to large, new to generate
Aliased pixels image, aliased pixels image is as shown in Fig. 3, beta distribution random numbers generator generate digital corresponded manner
It is stored；
3) image restores aliased pixels image when playing, and reducing end is mapped by the position random number array of step 2)
Counter push away of mode is reduced into transfer image acquisition；When needing to go back original image, obscures end and believe the position of the transformed pixel unit of step 1)
The digital corresponded manner that the beta distribution random numbers generator that breath and step 2) use generates is sent to reducing end, such as attached drawing 4
It is shown, it is reduced into transfer image acquisition according to counter push away of this mapping relations；
4) according to the location information of the transformed pixel unit of step 1) by the YCbCr pixels of corresponding position in transfer image acquisition
Cell translation obtains former multi-view image at rgb pixel unit, merging.
As shown in Fig. 5, the original video code stream of capture is encrypted, enter privately owned player by step 1),
2) it carries out multi-view image to obscure, image information is connected to FPGA/ driving plates, wherein step 1) by HDMI/DP interfaces later
Pixel conversion information and the position random number array mapping relations that use of step 2) by the privately owned physical connection certification such as USB after
Be also communicated to FPGA/ driving plates, then by step 3), 4) carry out solution and obscure image restoring and 3D rows figure, it is defeated to generate analog signal
The LCD panel entered to 3D TVs carries out image broadcasting.Image is avoided in transmission process and is cracked well.Due to the output of FPGA
For double LVDS or VB1 interfaces, this kind of interface is the analog signal based on voltage difference, and each pixel institute can be obtained by waveform
The actual value of representative temporarily has no idea to prevent to be cracked after FPGA outputs.
Embodiment 2
Other steps such as embodiment 1, the difference is that：In 16 pixel units of original image 10 pixel units first from
RGB is converted into YcbCr, and the pixel unit that random number and transfer image acquisition are generated using chi square distribution randomizer is carried out pair
It answers, and carries out arrangement from big to small according to the random number of generation and obscure.
Embodiment 3
Other steps such as embodiment 1, the difference is that：
Step 2) generates 6 groups of random numbers using beta distribution random numbers generator.The first frame multi-view image of video
The first row, which is added, implies control word, and the random number array for controlling the multi-view image selection one of which of current video is mapped
It is penetrated with reflection.
Assuming that actual screen behavior n, then this method needs the first row for sacrificing first frame image to be used as control information,
Valid pixel behavior n-1 rows.
Embodiment 4
Other steps such as embodiment 2, the difference is that：
Step 2) generates 12 groups of random numbers using gamma distribution random numbers generator.Each frame multi-view image of video
The first row, which is added, implies control word, and the random number array for controlling the multi-view image selection one of which of present frame is reflected into Mobile state
It penetrates and reflection is penetrated.
Assuming that actual screen behavior n, then this method needs the first row for sacrificing each frame image to be used as control information,
Valid pixel behavior n-1 rows.
It is only presently preferred embodiments of the present invention, practical range not for the purpose of limiting the invention, Fan Yibenshen in summary
Please equivalent changes and modifications made by the content of the scope of the claims, all should be the technology scope of the present invention.
Claims (8)
1. a kind of time slot scrambling of multi-view image, former multi-view image is obscured by obscuring end and figure will be obscured by reducing end
As reduction, it is characterised in that：Include the following steps：
1) obscure end and convert part rgb pixel unit in former multi-view image to YCbCr pixel units, form transfer image acquisition；
2) each pixel unit sub-pixel is mapped using position random number array in transfer image acquisition, generates new aliased pixels figure
Picture；
3) image restores aliased pixels image, the position random number array mapping mode that reducing end passes through step 2) when playing
Counter push away is reduced into transfer image acquisition；
4) according to the location information of the transformed pixel unit of step 1) by the YCbCr pixel units of corresponding position in transfer image acquisition
It is converted into rgb pixel unit, merging obtains former multi-view image.
2. a kind of time slot scrambling of multi-view image according to claim 1, it is characterised in that：Position described in step 2)
The mapping of random number array is predisposed at least one set, and multi-view image random selection one of which random number array mapping is mixed
Confuse.
3. a kind of time slot scrambling of multi-view image according to claim 2, it is characterised in that：The first frame of one video
The first row of multi-view image, which is added, implies control word, and the random number array for controlling the multi-view image selection of current video carries out
Mapping and reflection are penetrated.
4. a kind of time slot scrambling of multi-view image according to claim 2, it is characterised in that：Each frame of one video
The first row of multi-view image, which is added, implies control word, and the random number array for controlling the multi-view image selection of present frame is reflected
It penetrates and reflection is penetrated.
5. a kind of time slot scrambling of multi-view image according to claim 2, it is characterised in that：In step 3), end is obscured
The position random number array mapping mode that the location information of the transformed pixel unit of step 1) and step 2) use is transferred to
Reducing end is used to obscure the reduction of image.
6. a kind of time slot scrambling of multi-view image according to claim 5, it is characterised in that：Pass through network or physics
Connection sends the reduction for being transmitted to reducing end for obscuring image.
7. a kind of time slot scrambling of multi-view image according to claim 1, it is characterised in that：At least 50% in step 1)
Rgb pixel unit be converted into YCbCr pixel units.
8. a kind of time slot scrambling of multi-view image according to claim 1, it is characterised in that：Original is regarded more in step 1)
Part rgb pixel unit is converted into the use of YCbCr pixel units and randomly selects mode in point image.
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| CN101894359A (en) * | 2010-07-13 | 2010-11-24 | 北京信息科技大学 | Image scrambling encryption method |
| CN103455971A (en) * | 2013-09-04 | 2013-12-18 | 上海理工大学 | Image encryption method combining three-dimensional Arnold transformation with chaotic sequence |
| CN103606126A (en) * | 2013-11-28 | 2014-02-26 | 辽宁大学 | Image duel scrambling method based on three-dimensional Logistic mapping |
| KR101387045B1 (en) * | 2013-03-29 | 2014-04-18 | 목포해양대학교 산학협력단 | An image contents security system for digital holographic broadcasting service and the method thereof |
| CN105554344A (en) * | 2015-12-07 | 2016-05-04 | 中国矿业大学 | Multi-image encryption method based on mixed graphics primitives |
| CN106558015A (en) * | 2016-10-08 | 2017-04-05 | 广东工业大学 | A kind of new intersection composite chaotic multicolor image encryption algorithm |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004015547A (en) * | 2002-06-07 | 2004-01-15 | Canon Inc | Image encrypting device, image encrypting method, decrypting device, decrypting method, program, and storage medium |
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2017
- 2017-04-24 CN CN201710269767.8A patent/CN107027020B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101894359A (en) * | 2010-07-13 | 2010-11-24 | 北京信息科技大学 | Image scrambling encryption method |
| KR101387045B1 (en) * | 2013-03-29 | 2014-04-18 | 목포해양대학교 산학협력단 | An image contents security system for digital holographic broadcasting service and the method thereof |
| CN103455971A (en) * | 2013-09-04 | 2013-12-18 | 上海理工大学 | Image encryption method combining three-dimensional Arnold transformation with chaotic sequence |
| CN103606126A (en) * | 2013-11-28 | 2014-02-26 | 辽宁大学 | Image duel scrambling method based on three-dimensional Logistic mapping |
| CN105554344A (en) * | 2015-12-07 | 2016-05-04 | 中国矿业大学 | Multi-image encryption method based on mixed graphics primitives |
| CN106558015A (en) * | 2016-10-08 | 2017-04-05 | 广东工业大学 | A kind of new intersection composite chaotic multicolor image encryption algorithm |
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Effective date of registration: 20211122 Address after: 201899 room 2008, building 10, No. 70 Bole Road, Jiading town, Jiading District, Shanghai Patentee after: Shanghai Cloud Vision Networks Technology Co.,Ltd. Address before: 200230 Room 102, floor 1, building 11, No. 1582, Gumei Road, Xuhui District, Shanghai Patentee before: MCLOUD (SHANGHAI) DIGITAL TECHNOLOGY CO.,LTD. |