CN103986517B - Method and system for transmitting information through dynamic two-dimensional image information - Google Patents
Method and system for transmitting information through dynamic two-dimensional image information Download PDFInfo
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- CN103986517B CN103986517B CN201410241293.2A CN201410241293A CN103986517B CN 103986517 B CN103986517 B CN 103986517B CN 201410241293 A CN201410241293 A CN 201410241293A CN 103986517 B CN103986517 B CN 103986517B
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Abstract
The invention discloses a method and system for transmitting information through dynamic two-dimensional image information. The method includes the steps that according to information carrying capacity of each frame of a set imaging array, information to be sent is converted into multi-frame two-dimensional image driving information; the imaging array is controlled to sequentially display multiple frames of two-dimensional images according to the two-dimensional image driving information; the display state of the imaging array is sampled to obtain the two-dimensional images, and the sampling speed is higher than or equal to two times of the frame conversion speed of the two-dimensional images; the two-dimensional images are demodulated, and thus the information to be sent is obtained. Through the technical scheme, the information transmission amount and the transmission speed of visible light communication are increased.
Description
Technical field
The present invention relates to visible ray communication technique field, more particularly, it relates to a kind of adopt Dynamic Two-dimensional image information
Carry out the method and system of information transfer.
Background technology
It can be seen that optical communication is new, the short distance that one kind technically grows up in light emitting diode (led luminescent device)
From high speed wireless communication technology.The general principle of visible light communication is exactly to be switched than fluorescent lamp and incandescent lamp using light emitting diode
Fireballing feature, is communicated by the high frequency flicker of led luminescent device light source, has light to represent 1, unglazed represent 0, send
The optical signal of high speed, obtains information through opto-electronic conversion.
Because its data is difficult disturbed and capture, optical communication equipment makes simple and is hardly damaged and disappears visible light communication
Magnetic, can be used to make wireless optical encryption key pair.It is seen that optical communication technique has quite abundant frequency spectrum money compared with microwave technology
Source, this is general microwave communication and radio communication is incomparable；Visible light communication can use any communication protocol, fit simultaneously
For any environment；In secure context, it, compared to traditional magnetic material, without having to worry about demagnetization problem, more there is no concern that logical
Letter content is stolen by others；The flexible border of equipment hypothesis of wireless light communication, and with low cost, it is suitable for large-scale popularization and answer
With.
But it is seen that optical communication is limited by led luminescent device modulation bandwidth, single led luminescent device carries out light and leads to
During news, transinformation is little, and information transfer efficiency is low.How to improve the transmission quantity of information and transmission efficiency during optical communication
It is current problem demanding prompt solution.
Content of the invention
For solving above-mentioned technical problem, the present invention provides a kind of side carrying out information transfer using Dynamic Two-dimensional image information
Method and system, improve transinformation and the transmission efficiency of visible optical communication.
For achieving the above object, the following technical scheme of present invention offer:
A kind of method that information transfer is carried out using Dynamic Two-dimensional image information, this information transferring method includes:
Information to be sent is converted to the two dimensional image of multiframe by the relativity of information according to each frame setting imaging array
Activation bit；
Described imaging array is controlled to show multiframe two dimensional image successively according to described two dimensional image activation bit；
The dispaly state of described imaging array is sampled, obtains described two dimensional image, the speed of described sampling is more than
Or two times of the frame conversion rate equal to described two dimensional image；
Described two dimensional image is demodulated process, and then obtains described information to be sent.
Preferably, in the above-mentioned methods, described imaging array includes being arranged on the anchor point of described three drift angles of imaging array
Region, positioned at described imaging array with two anchor points between be provided with Timing Belt, described Timing Belt includes the first display shape
State and the second dispaly state；
When controlling described imaging array display multiframe two dimensional image, described anchor point dispaly state does not change, adjacent
In two frame two dimensional images, the two dimensional image of former frame is differed with the dispaly state of the Timing Belt of the two dimensional image of a later frame.
Preferably, in the above-mentioned methods, also included before being demodulated processing:
Geometric correction is carried out to the described two dimensional image obtaining, eliminates the geometric distortion of described two dimensional image.
Preferably, in the above-mentioned methods, described described two dimensional image is demodulated process include:
Determine the effective information region of described two dimensional image according to the anchor point region of the described two dimensional image obtaining；
Timing Belt dispaly state according to the described two dimensional image obtaining removes the redundant image in described two dimensional image, makes
The two dimensional image that the two dimensional image obtaining of must sampling is shown with imaging array corresponds, and realizes synchronizing information；
Two dimensional image after synchronizing information is demodulated processing successively, obtains described information to be sent.
Preferably, in the above-mentioned methods, described sample rate is two times of the frame conversion rate of described two dimensional image.
Preferably, in the above-mentioned methods, described imaging array is led array display panel or display panels.
Present invention also offers a kind of system carrying out information transfer using Dynamic Two-dimensional image information, this information transfer system
System includes: image generation module, image capture module and information detecting module；
Described image generation module is used for relativity of information according to each frame setting imaging array by information to be sent
Be converted to the two dimensional image activation bit of multiframe, control described imaging array to show successively according to described two dimensional image activation bit
Multiframe two dimensional image；
Described image acquisition module is used for the dispaly state of described imaging array is sampled, and obtains described X-Y scheme
Picture, the sample rate of described image acquisition module is more than or equal to two times of the frame conversion rate of described two dimensional image；
Described information detection module is used for described two dimensional image being demodulated process, and then obtains described pending deliver letters
Breath.
Preferably, in said system, described imaging array includes being arranged on the anchor point of described three drift angles of imaging array
Region, positioned at described imaging array with two anchor points between be provided with Timing Belt, described Timing Belt includes the first display shape
State and the second dispaly state；
When controlling described imaging array display multiframe two dimensional image, described image generation module is used for controlling described anchor point
Dispaly state do not change, in two adjacent frame two dimensional images, control the X-Y scheme of two dimensional image and a later frame of former frame
The dispaly state of the Timing Belt of picture differs.
Preferably, in said system, described image acquisition module be additionally operable to obtain described two dimensional image carry out several
What corrects, and eliminates the geometric distortion of described two dimensional image.
Preferably, in said system, described information detection module includes:
Positioning unit, described positioning unit is used for determining described two dimension according to the anchor point region of the described two dimensional image obtaining
The effective information region of image；
Information synchronizing unit, described information lock unit is used for the Timing Belt display shape according to the described two dimensional image obtaining
State removes redundant image in described two dimensional image so that the two dimensional image that shows with imaging array of the two dimensional image that obtains of sampling
Correspond, realize synchronizing information；
Demodulation process unit, described demodulation process unit is used for the two dimensional image after synchronizing information is demodulated locating successively
Reason, obtains described information to be sent.
Preferably, in said system, the sample rate of described image acquisition module is the frame conversion of described two dimensional image
Two times of speed.
Preferably, in said system, described imaging array is led array display panel or display panels.
From technique scheme as can be seen that provided by the present invention carry out information transfer using Dynamic Two-dimensional image information
Method include: information to be sent is converted to the X-Y scheme of multiframe by the relativity of information according to each frame setting imaging array
As activation bit；Described imaging array is controlled to show multiframe two dimensional image successively according to described two dimensional image activation bit；To institute
The dispaly state stating imaging array is sampled, and obtains described two dimensional image, and the speed of described sampling is more than or equal to described two
Two times of the frame conversion rate of dimension image；Described two dimensional image is demodulated process, and then obtains described information to be sent.Can
See, described information method carries out visible optical communication by imaging array, improve transinformation and the biography of visible optical communication
Pass speed.
Brief description
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
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of stream of method carrying out information transfer using Dynamic Two-dimensional image information provided in an embodiment of the present invention
Journey schematic diagram；
Fig. 2 is a kind of structural representation of imaging array provided in an embodiment of the present invention；
Fig. 3 is a kind of method flow schematic diagram two dimensional image being demodulated process provided in an embodiment of the present invention；
Fig. 4 is a kind of Transmission system carrying out information transfer using Dynamic Two-dimensional image information provided in an embodiment of the present invention
Structural representation.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
As described in the background art, it is current for how improving the transmission quantity of information and transmission efficiency during optical communication
Problem demanding prompt solution.
Inventor's research finds, it is possible to use imaging array carries out visible optical communication, so can create multiple parallel
The space channel of communication, these parallel space channels of effectively utilizes carry out data transmission improving volume of transmitted data and biography
Pass speed.
Information to be sent is carried out the dynamic two dimensional image of multiframe by imaging array show, obtain described two dimensional image
Afterwards, and by information demodulation can obtain described information to be sent, with respect to the visible optical communication of single led luminescent device, improve
Transinformation and information transmission speed.
Based on the studies above, one embodiment of the application provides one kind and enters row information biography using Dynamic Two-dimensional image information
Defeated method, with reference to Fig. 1, the method includes:
Step s1: described information to be sent is converted to multiframe by the relativity of information according to each frame setting imaging array
Two dimensional image activation bit.
Described information to be sent can be video information, acoustic information, image information or Word message, but is not limited to
State information type.
The present embodiment carries out information transmission by the two dimensional image of imaging array, and it is each for the imaging array setting
The transinformation of two field picture is to set, and information to be sent includes substantial amounts of data message, accordingly, it would be desirable to just described treat
Transmission information is converted to the two dimensional image activation bit of multiframe according to the bearing capacity of each two field picture of described imaging array.If
The data message that described information to be sent includes is less, only need to be converted into a frame two dimensional image activation bit.
Described information to be sent can be converted to two dimensional image activation bit by conversion technology of information, for driving imaging
Array carries out two dimensional image and shows.Described two dimensional image activation bit can be binary data or quaternary number evidence or ten
Senary data.I.e. described two dimensional image activation bit can be 2nBinary data, wherein, n is positive integer.
Step s2: control described imaging array to show multiframe two dimensional image successively according to described two dimensional image activation bit.
Under the two dimensional image activation bit of different frame, the two dimensional image that described imaging array carries out different frame shows.
Described imaging array can be led array display panel or display panels, in the present embodiment with led battle array
Illustrate as a example row display floater.
When described array of display is led array display panel, in described imaging array, comprise the led of multiple array arrangements
Luminescent device, controls the voltage of described led luminescent device according to described two dimensional image activation bit, and then can control described
The luminous intensity of led luminescent device, and then control the overall image of described imaging array to show.
During as described two dimensional image activation bit for binary data, can be by high level and low level (no-voltage) two
Planting voltage controls each led luminescent device only to have bright and two dispaly states that do not work so that each led luminescent device is in high electricity
Bright at ordinary times, do not work in low level.
When described two dimensional image activation bit is 2nDuring binary data, n >=2, only above-mentioned high level need to be divided into 2n- 1 part,
Described led is made to have 2 under non-zero voltagenThe dispaly state of-a kind of different brightness, the state of not working under no-voltage that adds is
2 can be hadnPlant dispaly state.
Two dimensional image activation bit described in this enforcement is quaternary number evidence, can be used for driving described led luminescent device tool
There are four kinds of different dispaly states, compared to binary data, reduce imaging array and carry out coding redundancy during image display, carry
High amount of transmitted information, simultaneously drives relatively easy being easily achieved.
If described two dimensional image activation bit is only a two field picture, described imaging array corresponding display one frame only need to be controlled
Two dimensional image.If described two dimensional image activation bit has multiframe two dimensional image, need to become throw-over with the frame setting
Degree, controls described led display multiframe two dimensional image successively.
Described imaging array includes being arranged on the anchor point region of described three drift angles of imaging array, positioned at described imaging array
It is provided with Timing Belt, described Timing Belt includes the first dispaly state and the second dispaly state between with two anchor points on one side；
When controlling described imaging array display multiframe two dimensional image, described anchor point dispaly state does not change, adjacent
In two frame two dimensional images, the two dimensional image of former frame is differed with the dispaly state of the Timing Belt of the two dimensional image of a later frame.
With reference to Fig. 2, Fig. 2 is the structural representation of this enforcement described led array display panel, described led array display surface
Plate is 64 × 64 led array, including 4096 led light emitting device display parts.Its three drift angles be respectively arranged with have 3 ×
The anchor point region 1 of 3 led luminescent devices, anchor point region 2, anchor point region 3, it is located at.Positioned at led array with one side two anchors
It is provided with Timing Belt, described Timing Belt includes: Timing Belt 5 and Timing Belt 4 between point.Each Timing Belt is included positioned at same straight line
On 61 led luminescent devices.
The viewing area of described led array can be positioned by described anchor point region, entering of all anchor point regions is set
During the display of row image, dispaly state is constant, for the anchor point region with 3 × 3 led luminescent devices, arranges the aobvious of described anchor point
Show that the led luminescent device that state is centre is the brightest, be not positioned at eight eld luminescent devices of middle led luminescent device surrounding
Bright.
Described Timing Belt includes the first dispaly state and the second dispaly state, can determine two frames by described Timing Belt
Whether two dimensional image is two adjacent frame two dimensional images, shows driving described led array display panel to carry out multiframe two dimensional image
When showing, the Timing Belt dispaly state of the two dimensional image of same frame is identical, Timing Belt dispaly state in two adjacent frame two dimensional images
Different.It is not work that described first dispaly state can be arranged, and described second dispaly state is the brightest.
Imaging array for 64 × 64 removes three anchor point regions and two Timing Belts, and also 3947 led light
Device can be used for filling described two dimensional image activation bit, and that is, now the every two field picture of described imaging array has 3947 pixels
Point.
It should be noted that when using display panels as described imaging array, can be by controlling described liquid crystal
The dispaly state of each pixel cell of display floater makes to show multiframe two dimensional image successively.
Step s3: the dispaly state of described imaging array is sampled, obtains described two dimensional image, the speed of described sampling
Degree is more than or equal to two times of the frame conversion rate of described two dimensional image.
Control the frame conversion rate more than or equal to described two dimensional image for the speed of described sampling, so that described imaging battle array
When being listed in display multiframe two dimensional image, the two dimensional image of all for imaging array displays is all gathered, it is to avoid omit imaging array
Dispaly state.Specifically, described sample rate can be equal to two times of the frame conversion rate of described two dimensional image.
Step s4: described two dimensional image is demodulated process, and then obtains described information to be sent.
Due to when obtaining described two dimensional image it is impossible to image collecting device and described imaging array be completely secured just to setting
Put, so the display image of the imaging array obtaining there may be geometric distortion.Therefore also included before being demodulated processing: right
The described two dimensional image obtaining carries out geometric correction, eliminates the geometric distortion of described two dimensional image.Image processing field can be adopted
Mathematics change carry out described geometric correction, such as geometric correction can be carried out using hough shift theory.
With reference to Fig. 3, described described two dimensional image is demodulated process include:
Step s41: determine the effective information area of described two dimensional image according to the anchor point region of the described two dimensional image obtaining
Domain.
When obtaining the display image of described imaging array using image collecting device, will certainly be by ring around imaging array
Border image collects in the lump, that is, the two-dimensional image information gathering has environmental information interference.Therefore, now firstly the need of according to institute
State the effective display area domain that anchor point region determines each frame two dimensional image.
Step s42: the Timing Belt dispaly state according to the described two dimensional image obtaining removes superfluous in described two dimensional image
Remaining image, so that the two dimensional image that the two dimensional image obtaining of sampling is shown with described imaging array corresponds, realizes information same
Step.
Speed due to described sampling is more than the frame conversion rate of described two dimensional image, so can lead to the same of imaging array
One frame two dimensional image is collected repeatedly, and therefore, now the dispaly state according to described Timing Belt can remove by repeated acquisition
Two dimensional image, so that the multiframe two dimensional image that the X-Y scheme image of collection and imaging array show corresponds, realizes information same
Step.If the Timing Belt dispaly state gathering adjacent two dimensional image is identical, you can be judged to the two dimensional image of repeated acquisition, only
Using wherein one two field picture.
Step s43: the two dimensional image after synchronizing information is demodulated processing successively, obtains described information to be sent.
The multiframe two dimensional image that two dimensional image after synchronizing information and imaging array show corresponds, and now carries out
Information demodulation process can obtain described information to be sent.
The Dynamic Two-dimensional figure being carried out by imaging array by foregoing description, the present embodiment described information transmission method
As carrying out data transmission, improve transinformation and transmission speed.
Based on above-described embodiment, another embodiment of the application is additionally provided one kind and is carried out using Dynamic Two-dimensional image information
The system of information transfer, with reference to Fig. 3, this system includes: image generation module 6, image capture module 7 and information detecting module
8.
The relativity of information that described image generation module 6 is used for according to each frame setting imaging array will be described to be sent
Information is converted to the two dimensional image activation bit of multiframe, controls described imaging array successively according to described two dimensional image activation bit
Display multiframe two dimensional image.
Described image acquisition module 7 is used for the dispaly state of described imaging array is sampled, and obtains described X-Y scheme
Picture, the sample rate of described image acquisition module is more than or equal to two times of the frame conversion rate of described two dimensional image.Preferably,
The sample rate of described image acquisition module is equal to two times of the frame conversion rate of described two dimensional image.
Described information detection module 8 is used for described two dimensional image being demodulated process, and then obtains described pending deliver letters
Breath.
It is as described in embodiment above-mentioned, described imaging array includes being arranged on the anchor point area of described three drift angles of imaging array
Domain, positioned at described imaging array with two anchor points between be provided with Timing Belt, described Timing Belt includes the first dispaly state
And second dispaly state.
When controlling described imaging array display multiframe two dimensional image, described image generation module 6 is used for controlling described anchor
The dispaly state of point does not change, and in two adjacent frame two dimensional images, controls the two dimensional image of former frame and the two dimension of a later frame
The dispaly state of the Timing Belt of image differs.
Described image acquisition module 7 is additionally operable to carry out geometric correction to the described two dimensional image obtaining, and eliminates described two dimension
The geometric distortion of image.Described image acquisition module includes having the dresses such as the mobile phone of image collecting function, panel computer, video camera
Put, and geometric correction is carried out to the two dimensional image of collection using corresponding image processing system.
Described information detection module 8 includes: positioning unit, and described positioning unit is used for according to the described two dimensional image obtaining
Anchor point region determine the effective information region of described two dimensional image；Information synchronizing unit, described information lock unit is used for root
Remove the redundant image in described two dimensional image according to the Timing Belt dispaly state of the described two dimensional image obtaining so that sampling obtains
The two dimensional image one-to-one corresponding that show of two dimensional image and imaging array, realize synchronizing information；Demodulation process unit, described demodulation
Processing unit is used for the two dimensional image after synchronizing information is demodulated processing successively, obtains described information to be sent.
Described image acquisition module 7 and described information detection module 8 can be integrated in mobile phone, panel computer or intelligence
In the electronic equipments such as glasses, can directly read by described electronic equipment and decode that corresponding imaging array shows dynamic two
The data message that dimension image is transmitted, has bigger information content with respect to static Quick Response Code, provides more for user
Experience.
In the system, described imaging array can also be able to be display panels for led array display panel, its
Specific embodiment can be found in above-described embodiment, repeats no more in the present embodiment.
By foregoing description, the present embodiment described information Transmission system is shown by the dynamic image of imaging array,
Information transfer is carried out using dynamic two dimensional image, improves transinformation and the transmission speed of visible optical communication.
It should be noted that the present embodiment methods described embodiment and system embodiment description emphasize particularly on different fields, phase homophase
Explanation can be complementary to one another like part.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple modifications to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and be to fit to and principles disclosed herein and features of novelty phase one
The scope the widest causing.
Claims (10)
1. a kind of using Dynamic Two-dimensional image information carry out information transfer method it is characterised in that include:
The two dimensional image that information to be sent is converted to multiframe is driven by the relativity of information according to each frame setting imaging array
Information；
Described imaging array is controlled to show multiframe two dimensional image successively according to described two dimensional image activation bit；
The dispaly state of described imaging array is sampled, obtains described two dimensional image, the speed of described sampling is more than or waits
In the frame conversion rate of described two dimensional image two times；
Described two dimensional image is demodulated process, and then obtains described information to be sent；
Wherein, described imaging array includes being arranged on the anchor point region of described three drift angles of imaging array, positioned at described imaging battle array
It is provided with Timing Belt, described Timing Belt includes the first dispaly state and the second dispaly state between arranging with two anchor points on one side；
When controlling described imaging array display multiframe two dimensional image, described anchor point dispaly state does not change, in two adjacent frames
In two dimensional image, the two dimensional image of former frame is differed with the dispaly state of the Timing Belt of the two dimensional image of a later frame.
2. method according to claim 1 is it is characterised in that also included before being demodulated processing:
Geometric correction is carried out to the described two dimensional image obtaining, eliminates the geometric distortion of described two dimensional image.
3. method according to claim 2 it is characterised in that described described two dimensional image is demodulated process include:
Determine the effective information region of described two dimensional image according to the anchor point region of the described two dimensional image obtaining；
According to the redundant image in the Timing Belt dispaly state described two dimensional image of removal of the described two dimensional image obtaining so that adopting
The two dimensional image that the two dimensional image that sample obtains and imaging array show corresponds, and realizes synchronizing information；
Two dimensional image after synchronizing information is demodulated processing successively, obtains described information to be sent.
4. method according to claim 1 is it is characterised in that the frame that described sample rate is described two dimensional image becomes throw-over
Two times of degree.
5. method according to claim 1 is it is characterised in that described imaging array is led array display panel or liquid crystal
Display floater.
6. a kind of using Dynamic Two-dimensional image information carry out information transfer system it is characterised in that include: image generate mould
Block, image capture module and information detecting module；
Described image generation module is used for changing information to be sent according to the relativity of information of each frame setting imaging array
For the two dimensional image activation bit of multiframe, described imaging array is controlled to show multiframe successively according to described two dimensional image activation bit
Two dimensional image；
Described image acquisition module is used for the dispaly state of described imaging array is sampled, and obtains described two dimensional image, institute
The sample rate stating image capture module is more than or equal to two times of frame conversion rate of described two dimensional image；
Described information detection module is used for described two dimensional image being demodulated process, and then obtains described information to be sent；
Wherein, described imaging array includes being arranged on the anchor point region of described three drift angles of imaging array, positioned at described imaging battle array
It is provided with Timing Belt, described Timing Belt includes the first dispaly state and the second dispaly state between arranging with two anchor points on one side；
When controlling described imaging array display multiframe two dimensional image, described image generation module is used for controlling the aobvious of described anchor point
Show that state does not change, in two adjacent frame two dimensional images, control the two dimensional image of former frame and the two dimensional image of a later frame
The dispaly state of Timing Belt differs.
7. system according to claim 6 is it is characterised in that described image acquisition module is additionally operable to described two obtaining
Dimension image carries out geometric correction, eliminates the geometric distortion of described two dimensional image.
8. system according to claim 7 is it is characterised in that described information detection module includes:
Positioning unit, described positioning unit is used for determining described two dimensional image according to the anchor point region of the described two dimensional image obtaining
Effective information region；
Information synchronizing unit, described information lock unit is used for being gone according to the Timing Belt dispaly state of the described two dimensional image obtaining
Except the redundant image in described two dimensional image so that the two dimensional image that shows with imaging array of the two dimensional image that obtains of sampling one by one
Corresponding, realize synchronizing information；
Demodulation process unit, described demodulation process unit is used for the two dimensional image after synchronizing information is demodulated processing successively,
Obtain described information to be sent.
9. system according to claim 6 is it is characterised in that the sample rate of described image acquisition module is described two dimension
Two times of the frame conversion rate of image.
10. system according to claim 6 is it is characterised in that described imaging array is led array display panel or liquid crystal
Display floater.
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| CN104579467B (en) * | 2014-12-03 | 2017-02-22 | 南京邮电大学 | Frame positioning method for free space optical communication |
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| WO2017128314A1 (en) * | 2016-01-29 | 2017-08-03 | 深圳市大疆创新科技有限公司 | Method, system and device for video data transmission, and photographic apparatus |
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| CN109104243B (en) * | 2018-08-01 | 2020-11-03 | 北方工业大学 | Pixel communication method, information sending terminal and information receiving terminal |
| CN110033070A (en) * | 2019-04-19 | 2019-07-19 | 重庆三峡学院 | A kind of two dimension multiframe modulation demodulation system |
| CN110289910A (en) * | 2019-07-19 | 2019-09-27 | 吉林大学 | A kind of method, apparatus and computer readable storage medium of file transmission |
| CN110855362B (en) * | 2019-11-18 | 2021-08-03 | 南京工程学院 | Secret communication method and system based on visible light LED matrix |
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| US20100247112A1 (en) * | 2009-03-31 | 2010-09-30 | Soo-Young Chang | System and Method for Visible Light Communications |
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| CN102843186A (en) * | 2011-06-23 | 2012-12-26 | 卡西欧计算机株式会社 | Information transmission system, information sending device, information receiving device, information transmission method, information sending method and information receiving method |
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