CN103327317B - Optic communication transmission and reception device and method and optical communication system and method - Google Patents
Optic communication transmission and reception device and method and optical communication system and method Download PDFInfo
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- CN103327317B CN103327317B CN201210561820.9A CN201210561820A CN103327317B CN 103327317 B CN103327317 B CN 103327317B CN 201210561820 A CN201210561820 A CN 201210561820A CN 103327317 B CN103327317 B CN 103327317B
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Abstract
The invention provides a kind of optic communication transmission and reception device and method and optical communication system and method.According to an embodiment, an optical communication system includes a conveyer and a reception device.This conveyer produces one or more patterns of light to determine to emit light in an at least reference zone, and this at least reference zone determined by this one or more pattern to transmit signal.This reception device takes this one or more pattern for carrying out detected light than the less amount of measurement of a pixel total amount in a sensing image, and the pattern detected according to one or more determines an at least interest region, then optic communication is handled using all signals of light in this at least an interest region, and takes measurement more less amount of than a pixel total amount in an at least trace regions to follow the trail of this one or more pattern of the thus light of conveyer transmitting.
Description
Technical field
The present invention is on a kind of optic communication transmission and reception device and method and optical communication system and method.
Background technology
Optic communication is a kind of use light to complete the wireless communication technology of communication, and wherein light can be by one or more light two
Pole pipe (photo diode) or an imaging sensor are sensed.For example, light may be, but not limited to, X-ray, ultraviolet light
(ultra-violet light), visible ray (visible light) or from 109Hz to 1019It is infrared in Hz frequency range
Line (infrared).The bandwidth of radio wave (RF) is a kind of precious resource.So, optic communication can provide a kind of meet by force
The substitute technology of the radio communication of strength demand.For example, the visible ray sent from one or more light emitting diodes (LED) in family and
It is widely used in office, therefore it causes the visible ray sent from one or more LEDs to be enough to be applied to ubiquitous number
According to conveyer (data transmitter).Camera has been commonly used for mobile phone, notebook and many hand-helds
Electronic equipment.Therefore imaging sensor can be used as an input picture detector (incoming image detector),
Can be as the receiver in visible light communication (Visible Light Communication, VLC) system.Fig. 1 is to use one
The imaging sensor 122 of LED array 112 and one such as high speed camera, optical communication system an example schematic.As shown in figure 1,
One encoder 114 of one conveyer 110 can perform physical layer process (physical layer processing), such as wrong
Amendment encodes (error-correctionencoding), modulation (modulation), OFDM modulation (OFDM) by mistake
Deng.The inverse signal that can perform encoder 114 in a decoder 124 of a receiver 120 handles (inverse
signalprocessing).Fig. 2 be using the imaging sensors 222 of a single LED 212 and one such as high speed camera, optic communication
One example schematic of system.
One imaging sensor can be made up of the photosensitive unit (photosensite) of an array.Charge coupled cell
(Charge Coupled Device, CCD) and complementary metal oxide semiconductor (Complementary Metal-Oxide
Semiconductor, CMOS) be two kinds of fundamental types digital sensor.The first row photosensitive unit of one ccd sensor array
It is read into an output state, then is transported to an amplifier (amplifier) and an analogue-to-digital converters (ADC).
After the first row is read, it is dumped out from the buffer of reading, and the next line photosensitive unit of this array is read into
In this buffer.Each photosensitive unit in cmos sensor has at least three transistor (transistor).These are brilliant
Body pipe is allowed to do photosensitive processing in photosensitive unit, and each pixel/photosensitive unit can be accessed individually respectively.At some
In existing optical communication technique, in this two kinds of any imaging sensor, only one or a few is shared
ADCs be used to sense all pixels in image.
Fig. 3 is an example schematic of a visible light communication technology.In figure 3, a sensing image (sensed image)
In non-interest region (non-interested region) imaging sensor of the pixel in a receiver 320 also by sharing
ADC is sampled, then by the receiver (Rx) in receiver 320-fundamental frequency processing unit (baseband processing
Uint) 326 abandon.In other words, this technology takes all pixels of shooting from imaging sensor 322, and uses a brightness
Change detects (luminance change detection) to detect interest region (Region Of Interest, ROI).Adopt
All pixels in image are taken to limit the sampling rate (frame rate) for reaching as high as hundreds of pictures per second.However,
Data rate (data rate) requirement for being generally used for radio communication is 10M per second to 1G.
Fig. 4 is another example schematic of a visible light communication technology.In Fig. 4 visible light communication system, a transmission
Device 400 has the smooth launch driving circuit (light-emitting of a modulation circuit (modulation circuit) 410 and one
drive circuit)420.Modulation circuit 410 produces different modulated signals 412.Light launch driving circuit 420 is according to from tune
Modulated signal 412 that circuit 410 processed is exported and as a drive signal 421, to drive a light-emitting component 422.Work as drive signal
421 when being maintained at a high level, and light launch driving circuit 420 causes light-emitting component 422 to send the visible ray with the superposition of signal 402
440.When drive signal 421 is maintained at a low level, light launch driving circuit 420 causes light-emitting component 422 not light.
Optic communication is still a potential solution for global radio spectrum shortage.Visible light communication technology it is each
Solution is planted to be suggested.Generally, photocell such as LED, and imaging sensor such as camera, are that visible light communication is solved
The existing element of scheme.However, LED frequency response has low bandwidth, and imaging sensor has because of shared ADC
Low sampling rate.Therefore, for the high data transmission rate (high data transmission rate) of visible light communication
Solution still has many challenges.
The content of the invention
The embodiment of the present invention provides a kind of optic communication transmission and reception device and method and optical communication system and method.
One embodiment of the invention is that, on a kind of conveyer of optic communication, this conveyer can be produced comprising a pattern
Unit, is configured as producing one or more patterns, to determine at least one or more reference zones；One optic communication (LC) control is single
Member, is connected to one conveyer-fundamental frequency processing unit, and this LC control unit from this conveyer-fundamental frequency processing unit or from this
Pattern generation unit selects it to input；And a light-emitting component, determined from this one or more pattern or this one or more pattern
This one or more reference zone in launch light.
Another embodiment of the present invention is that, on a kind of transfer approach of optic communication, this transfer approach can be included：Via making
A light-emitting component is used, during an at least cycle, transmits one or more patterns to determine one or more reference zones；And make
This light-emitting component is used, by emitting light to transmit data in one or more reference zones for determining from this one or more pattern.
Another embodiment of the present invention is that, on a kind of reception device of optic communication, this reception device can include a region of interest
Domain (ROI) determining means, an image sensing element (image sensing element) and a graphics processing unit.This
ROI determining meanss are configured as one or more patterns that detecting one senses the light in image, and according at least on detection of
Pattern (detected pattern) determines this at least ROI.This image sensing element is configured as producing this sensing image,
And light is sensed according to an output of this ROI determining means generation.This graphics processing unit in this at least a ROI, according to
The output of this image sensing element carries out image procossing.
Another embodiment of the present invention is that, on a kind of method of reseptance of optic communication, this method of reseptance can be included：Obtained one
Under modulus formula (acquisition mode), a pixel total amount small amount of image is sensed using one than an image sensing element
More than one first measurements, detecting one or more patterns received, and the pattern detected according to one or more is determined
A fixed at least ROI；And under a data receiver pattern (data receiving mode), use light in this at least a ROI
All pixels data handle optic communication.
Another embodiment of the present invention is on a kind of optical communication system.This optical communication system comprising a conveyer and
One reception device.This conveyer is configured as producing one or more patterns determining an at least reference zone, and by from
Emit light to transmit data in one or more reference zones that this one or more pattern is determined.This reception device is configured as detecting
This one or more pattern, and one or more patterns detected according to one or more determine an at least ROI, then use this
All signals of light in an at least ROI handle optic communication.
Another embodiment of the present invention is on a kind of optical communication method.The method can be included：In a conveyer, production
One or more patterns of the third contact of a total solar or lunar eclipse determine an at least reference zone, and one or more by being determined from this one or more pattern
Emit light to transmit data in reference zone；It is less using the pixel total amount than a sensing image and one in reception device
More than one first measurements of amount, carry out this one or more pattern of detected light, and the pattern detected according to one or more is determined
A fixed at least ROI, then handles optic communication using all pixels data of light in this at least a ROI.
Now coordinate drawings below, the detailed description of embodiment and claim, other advantages that the present invention is addressed by are detailed
After being set forth in.
Brief description of the drawings
Fig. 1 is an example schematic of the optical communication system using a LED array and an imaging sensor.
Fig. 2 is an example schematic of the optical communication system using a single LED and an imaging sensor.
Fig. 3 is an example schematic of a visible light communication technology.
Fig. 4 is an example schematic of another visible light communication technology.
Fig. 5 is, according to one embodiment of the invention, to illustrate an optical communication system.
Fig. 6 A are the transfer approach for illustrating an optic communication according to one embodiment of the invention.
Fig. 6 B are, according to one embodiment of the invention, to illustrate that a pattern transmitted may decide that an example of a reference zone
Schematic diagram.
Fig. 7 A are, according to one embodiment of the invention, to illustrate to go out three by one 16 × 16LED array emitters in three different times
The example of individual different pattern.
Fig. 7 B are, according to one embodiment of the invention, to illustrate a reference zone by the LEDs of multiple point-like to represent.
Fig. 7 C are, according to one embodiment of the invention, to illustrate other three patterns launched by a LED array.
Fig. 8 is, according to one embodiment of the invention, to illustrate in five different times by the one of a single LED conveyers transmitting
Example pattern.
Fig. 9 is, according to one embodiment of the invention, to illustrate that multiple light sources transmit another example of pattern.
Figure 10 is the running for the method for reseptance for illustrating an optic communication according to one embodiment of the invention.
Figure 11 A to Figure 11 F are the operation workflows for illustrating an optical communication system according to one embodiment of the invention.
Figure 12 is, according to one embodiment of the invention, to illustrate an optical communication method.
Figure 13 is according to an embodiment of the invention, illustrates the side that a pattern is detected in obtaining mode or tracking pattern
Method.
【Main element symbol description】
110 conveyer 112LED arrays
The receiver of 114 encoder 120
The decoder of 122 imaging sensor 124
The 212 single imaging sensors of LED 222
The imaging sensor of 320 receiver 322
326 receivers-fundamental frequency processing unit
The modulation circuit of 400 conveyer 410
The drive signal of 412 modulated signal 421
The 420 smooth light-emitting components of launch driving circuit 422
440 visible rays
The conveyer of 500 optical communication system 510
512 pattern generation unit 512a one or more patterns
The optic communication control unit of 514 conveyers-fundamental frequency processing unit 516
One or more reception devices of signal 520 of 516a
The light-emitting component of 517 actuator unit 518
The image sensing element of 555 passage 522
A 524 interest region determining means 524a at least interest regions
526 528 receivers of graphics processing unit-fundamental frequency processing unit
610 transmit one or more patterns, and form the pattern of one or more shapes, to determine one or more reference zones
Emit light to transmit data in 615 one or more reference zones determined from this one or more pattern
620 reference zones of pattern 625 transmitted
T1, T2, T3 time
A, b, c, d light source
1101st, the reference zone of 1102,1103 image 1130
The trace regions of 1140 interest region 1160
1210 produce one or more light pattern, and this pattern one or more of shape can be formed to determine one or
Multiple reference zones
1220 launch light via a light-emitting component in one or more reference zones that one or more patterns are determined
1230
Obtaining mode
The less amount of measurement of a pixel total amount than a sensing image is taken to detect the pattern of one or more light, and root
The pattern detected according to one or more determines an at least interest region
1240
Data receiver pattern
This all optical signal at least interest region is taken to carry out the subsequent treatment of optic communication
1250
Tracking pattern
Measurement more less amount of than a pixel total amount of a trace regions is taken to follow the trail of the light that this light-emitting component is launched
This one or more pattern
All straight lines for sensing image are quantified as a parameter space by 1310
1315 derive an inverse conversion
1320 take than come self-inductance measurement image or a total amount from least random combine of the pixel of a trace regions compared with
A small amount of random measurement
The orthogonal matching pursuit of the amendment of 1325 application one is in this small amount of random measurement, to obtain this in this parameter space
The parameter of pattern
1330 repeat steps 1320 and 1325, untill reaching a final picture of this pattern
Embodiment
The embodiment of the present invention provides a kind of optical communication technique of increase data transmission rate (data rate).This technology is detected
The interest region (ROI) of optic communication, significantly reduces the sample rate of one or more shared ADCs in the image sensor
(sampling rate).Determined once receiver after this ROI, this ADC can be used only for the pixel in this interest region.
Compared to existing optical communication technique, sampling rate can be significantly increased in the embodiment of the present invention, and execution light can also be greatly reduced
The holding time (acquisition time) of communication.This feature is completed, a conveyer can launch the light of one or more patterns,
And this one or more pattern can form one or more shapes, to determine reference zone.This transmitting light may be, but not limited to,
X-ray, ultraviolet light, visible ray or from 109Hz to 1019The infrared ray of Hz frequency ranges.Then, this conveyer can pass through
Launch light in the reference zone determined from this one or more pattern, to transmit signal.In a receiver, it can take than a sensing
The less amount of measurement of a pixel total amount of image, to detect one or more patterns for the light that this conveyer is launched.Measurement can be wrapped
Include the random combine of the pixel in this sensing image.Once this receiver determines according to this one or more pattern detected
The interest region of this sensing image, this receiver can carry out the processing of optic communication using signal all in this interest region.
Fig. 5 is the optical communication system according to one embodiment of the invention.As shown in figure 5, this optical communication system 500 can be wrapped
Containing a conveyer 510 and a reception device 520.In conveyer 510, a pattern generation unit 512 can be configured
To produce one or more patterns 512a, and pattern 512a can form one or more shapes to determine one or more reference areas
Domain；One light-emitting component 518 can launch light in one or more reference zones that one or more patterns 512a is determined；And one
Optic communication (LC) control unit 516 is connected to one conveyer-fundamental frequency processing unit 514.This light-emitting component can be, but not limit
In a single LED or a LED array.This LC control unit 516 can be from this conveyer-fundamental frequency processing unit 514 or from this figure
Sample generation unit 512, to select its input.It is connected to the conveyer-fundamental frequency processing unit of optic communication (LC) control unit 516
More than the one fundamental frequency running of 514 executable radio communications, such as error corrected code, staggeredly (interleaving), modulation, IFFT
Deng.When conveyer 510 is during a data are transmitted, then this LC control unit is selected from conveyer-fundamental frequency processing unit 514
516 input.When this conveyer is (the reference region indication during a reference zone is indicated
When period), then the input of this LC control unit 516 is selected from pattern generation unit 512.One actuator unit 517, such as one
LED driver, each signal for one or more signals 516a that can produce LC control units 516, is used as an AC electric currents or electricity
Pressure, is additional to a direct current (DC) bias of light-emitting component 518, and can drive this light-emitting component 518 in one or more patterns
Launch light in one or more reference zones that 512a is determined.
The light launched in this one or more reference zone is sent to reception device 520 via a passage 555.Receiving
In device 520, an image sensing element 522, such as imaging sensor is configured as determining list according to an interest region (ROI)
The outputs that member 524 is produced sense light；This ROI determining means 524 is configured as the one of the light that detecting is launched from conveyer 510
Or multiple patterns, and the pattern detected according to one or more come determine from the one of image sensing element 522 sense image to
Few ROI 524a；And one graphics processing unit 525 according to the output of image sensing element 522 in ROI 524a, to perform
The processing of optic communication.This output can be, such as RGB to YUV (or YCbCr), color adjustment, filtering.This ROI determining means
Measurement more less amount of than the pixel total amount for sensing image can be taken to detect the pattern for the light being received.Measurement can include sense
The random combine of pixel in altimetric image.Graphics processing unit 525 can also take the pixel total amount than an at least trace regions
Less amount of measurement, to follow the trail of the pattern of the thus light of conveyer transmitting.
Reception device 520 may also include the one receiver-fundamental frequency processing unit 528 for being connected to graphics processing unit 526, come
Fundamental frequency processing is performed, such as FFT is demodulated, de-interlacing, error correction etc., to restore the data received.
According to this, the running of an optical communication method is as follows.In a conveyer, this optical communication method can produce one or more
The light of pattern, this pattern can form one or more shapes to determine an at least reference zone；And determined in one or more patterns
Emit light to transmit data in a fixed at least reference zone.Also, in a reception device, this optical communication method can take ratio
The less amount of measurement of a pixel total amount of one sensing image carrys out one or more patterns of detected light, and is detected according to one or more
One or more patterns come determine this sensing image an at least ROI, then take optical signals all in this at least ROI come
Handle optic communication.In this reception device, this optical communication method can also take the pixel total amount than an at least trace regions
Less amount of one or more patterns for measuring the light to follow the trail of the transmitting of this conveyer.This measurement can include this at least one tracking
The random combine of pixel in region.
It can be seen that because one or more patterns for the light that conveyer 510 is launched, and can be greatly reduced
Two quantity in the pattern detecting of reception device 520, such as shared ADC sampling amounts and computation complexity.So as to significantly
Reduce holding time.After reception device 520 determines ROI, ADC (s) can be only used for the pixel in ROI.So, when holding
During row optic communication, thus sampling rate is significantly increased.
Fig. 6 A are, according to one embodiment of the invention, to illustrate a kind of transfer approach of optic communication.In fig. 6, this transfer approach
One or more patterns 512a is transmitted first, and can form during at least one cycle this figure of one or more shapes
Sample, to determine one or more reference zones (step 610).For the use of optic communication, this transfer approach can be by using one
Transmission data (step 615) are emitted light in light-emitting component, one or more reference zones determined from this one or more pattern.Figure
6B is, according to one embodiment of the invention, to illustrate that a pattern 620 transmitted may decide that the example signal of a reference zone 625
Figure.One or more reference areas that this one or more pattern is determined can recognize the position of conveyer, such as feelings in multiple light courcess
Under condition, or it be used in optic communication transmit signal.This transfer approach may also include using an optic communication control unit, to select
One or more patterns are selected as its input, or select its input from one conveyer-fundamental frequency processing unit, this transmission
Device-fundamental frequency processing unit performs multiple fundamental frequencies running of radio communication.
One or more patterns of this transmission can form (time-invariant) sequence changed over time.Fig. 7 A are
According to one embodiment of the invention, illustrate to go out three different patterns by one 16 × 16LED array emitters in three different times
Example.In fig. 7, the blockage of oblique line represents (turned on) LED having been turned on, and the square of blank represents what is be turned off
(turned off) LED.Three arrows represent three different times, i.e., respectively time T1, time T2 and time
T3.So, the LED having been turned on can form a pattern sequence changed over time, and each pattern may be embodied in this LED gusts
The border or center of row, and may decide that a reference zone.In order to reduce in the detecting complexity of receiver end and time, one
The pattern transmitted can only include two lines.Fig. 7 B are, according to one embodiment of the invention, to illustrate a reference zone by multiple points
The LEDs of shape is represented.Data in this reference zone can through the turned on-closing keying modulation (on-off keying
Ofmodulation) thus multiple LEDs are transmitted mode.Fig. 7 C are, according to one embodiment of the invention, to illustrate by a LED array
Other three patterns of transmitting.
Fig. 8 is, according to one embodiment of the invention, to illustrate in five different times by the one of a single LED conveyers transmitting
Example pattern.In fig. 8, a grey bubble-cap (bubble) represents that this single LED is closed, and a white blister represents that this is single
LED is switched on.This pattern is formed by being regularly switched on and off this single LED.Five arrows represent the period 1 respectively
To the period 5.Reference zone is the illumination region for being equal to this single LED.After this pattern is formed, through the turned on-opening and closing or
This single LED voltage or the level (level) of electric current are adjusted, this single LED can start to transmit data.
Fig. 9 is, according to one embodiment of the invention, to illustrate that multiple light sources transmit another example of pattern.As shown in figure 9, having four
Individual light source, is represented with light source a to light source d, and only light source a is used as a conveyer of optic communication.So, only light source a
Launch a pattern for making a reservation for and changing over time, to recognize its position.In other words, the pattern by making a reservation for and changing over time
The reference zone determined can be used to the position that the light source of this pattern for making a reservation for and changing over time is launched in identification.
Figure 10 is the running for the method for reseptance for illustrating an optic communication according to one embodiment of the invention.This method of reseptance can be wrapped
Include three kinds of operating modes, i.e., obtaining mode ((acquisition mode), data receiver (data receiving) pattern, with
And follow the trail of (tracking) pattern.Under obtaining mode, this method of reseptance is more from a sensing image of an image sensing element
Individual pixel takes a small amount of measurement, to detect one or more transmission patterns (transmitted pattern).This measurement can be wrapped
Include the random combine of multiple pixels in this sensing image.The quantity for the measurement taken in the pattern of obtaining is less than sensing herein
A pixel total amount in image, for example, the image sensing arrays (imagesensing array) in an imaging sensor.This
Then method of reseptance compares detected pattern and one or more patterns, and this pattern can for example be stored in a storage arrangement
In (memory means).If obtaining a successful matching result from comparing, this method of reseptance is according to the figure detected
Sample determines an interest region (ROI).If not obtaining such successful matching result, this method of reseptance from comparing
Continue executing with the running that pattern is detected in above-mentioned obtaining mode.
After ROI is determined, this method of reseptance can enter data receiver pattern.Under data receiver pattern, this reception
Method is taken at the processing of all pixels data progress optic communication in this ROI, such as image procossing and receiver (Rx)-fundamental frequency
Reason.This pixel data can be taken from sensing image, or from optical signal.After the processing of this ROI optic communication terminates, this reception
Method can enter tracking pattern.Under tracking pattern, this method of reseptance takes the pixel total amount than an at least trace regions
Less amount of measurement transmits the conveyer of one or more patterns, the position of such as conveyer to follow the trail of.According under tracking pattern
One pattern detecting result, this ROI can be enhanced (refined) again.When ROI is enhanced completion, this method of reseptance is returned to
Data receiver pattern receives data.Processing of this data receiver pattern with following the trail of pattern can iteratively continue, until completing
Untill optic communication.
Figure 11 A to Figure 11 F are the operation workflow for illustrating an optical communication system according to one embodiment of the invention, this optic communication
System has the light-emitting component realized with a LED array.In Figure 11 A, in three different times, imaging sensor
One image sensing arrays sense three images 1101 to 1103, wherein the small grey square in each image is to obtain mould
The measurement taken under formula by the ADC in reception device, wherein this measurement are multiple rgb values of multiple pixels, and every
Runic lines in one image are the patterns of thus conveyer transmission.It is enterprising for the measurement taken on each image in this ADC
After row image procossing, for example, the rgb value of these pixels is converted to and represents the brightness of pixel value, using orthogonal matching pursuit
(Orthogonal Matching Pursuit, OMP) has conclusive brightness and a multiplication matrix to represent pixel value
(product matrix), can detect the parameter of the lines for the pattern to be formed on each image, as shown in Figure 11 B.In Figure 11 C
In, a reference zone 1130 is determined according to the pattern of three images detected, as is shown in phantom lines.This reference area
Domain may be, but not limited to, the maximum region that the lines detected in Figure 11 B are surrounded.The ADC of this reception device, which takes, to be contained
There is the ROI 1140 of reference zone 1130 each sampling, and the square filled with vertical line is represented, as shown in Figure 11 D, is used
In the subsequent treatment of optic communication.In various implementations, this ROI 1140 size can be more than, less than or equal to reference area
Domain 1130.Also, a region or the connection collection of multiple smaller area that a ROI can include, as depicted in fig. 11E.In Figure 11 F
In, horizontal line represents a trace regions 1160, wherein, reception device can use more less than a pixel total amount of trace regions 1160
The measurement of amount, to follow the trail of the position of conveyer.
Figure 12 is, according to one embodiment of the invention, to illustrate an optical communication method.As shown in figure 12, this optical communication method can be with
The pattern of one or more light is produced, and this pattern can form one or more of shape to determine one or more reference zones
(step 1210), and light can be launched in one or more reference zones that one or more patterns are determined via a light-emitting component
(step 1220).In an obtaining mode 1230, this optical communication method can take than one sensing image a pixel total amount compared with
The pattern of one or more light, and the pattern detected according to one or more are detected in a small amount of measurement (more than one first measurement)
To determine an at least ROI.In a data receiver pattern 1240, this optical communication method can take this at least all ROI light
Signal carries out the subsequent treatment of optic communication.This optical communication method can also pass into a tracking pattern.Pattern 1250 is followed the trail of herein
In, this optical communication method can take measurement more less amount of than a pixel total amount of a trace regions (measurement of more than one second)
To follow the trail of this one or more pattern for the light that this light-emitting component is launched.Produce light one or more patterns and this one or more
The details of pattern is omitted described in embodiment earlier, and herein.
Compression sensing (compressive sensing) and broad sense (generalized) Hough conversion (GHT) or
It is that the technologies of Radon conversions can be applied to carry out self-detection to have conclusive (under-determinant) random measurement
The pattern transmitted.Detailed procedure declaration is as follows.Make P={ π1, π2..., πNIt is that one group in parameter space may parameter
(possible parameter), wherein parameter space can be the geometric figure of straight line, circle or arbitrary shape combination or
It is any combination of set.It is a pointer function (indicator function) to make a parameter vector p, if that is, image is included
Parameter πk, then p k-th of element is non-zero.For example, three sensing images correspond respectively to three pointer function P1 in Fig. 7 A,
P2 and p3.Each image in Fig. 7 A includes two straight lines, so each pointer function is only comprising two nonzero elements.In other words
Say, the M bars straight line in two dimensional image space is equal to M point of the parameter space after GHT.For an image f, between f and p
Relation can be written as f=Hp, and wherein H is a GHT inverse operation (inverse operator) or random transition (random
Transform an inverse operation).Because pointer function p is sparse (sparse), the theory of compression sensing can be employed.
Therefore, the reception device in the embodiment of the present invention can take conclusive random measurement, rather than a whole image takes
Sample, to detect the pattern that pointer function p is transmitted.It is multiple random measurements to make y, and y size is much smaller than whole image
Size.What one relational expression y=Ψ f=Ψ Hp were to maintain, wherein Ψ is the basis vector (basisvector) of one group of random measurement
Set.Pointer function p can be via the estimator for meeting y=Ψ Hp conditionsTo be reconditioned.So,
Included in one conversion pattern (transformed pattern) in straight line number be it is as small as possible be relatively good.
Figure 13 is according to an embodiment of the invention, illustrates the side that a pattern is detected in obtaining mode or tracking pattern
Method.As shown in figure 13, all straight lines for sensing image are quantified as a parameter space (step 1310) by the method first, and are pushed away
Export an inverse conversion (step 1315), such as Hough conversions or a random transition.Produce the matrix that inverse Hough is changed
Exemplary applications can be first via using the angle, θ in the range of 0 ° to 180 °, and the radius r in the range of -25 to 25, example
Such as, Δ θ is equal to 2 ° and Δ r and is equal to 3, then obtains the size (size) of parameter space in (r, θ) coordinate system, wherein this size
(180/ Δ θ) × (50/ Δ r), i.e., equal to 1530 can be calculated as.Then, the method is taken than carrying out (one first survey of self-inductance measurement image
Amount) or pixel from an at least trace regions (one second measurement) random combine the less amount of random measurement of a total amount
(multiple measurements in the first measurement or the second measurement) (step 1320), and the OMP of the amendment of application one is a small amount of random herein
In measurement, to obtain the parameter (step 1325) of this pattern in this parameter space.This pattern need to take this measure on a small quantity
Quantity may be calculated C × k × log (N/k), and wherein C is a constant, and k is the number of this pattern cathetus, and N is this sense
The quantity of pixel in altimetric image.The method repeat step 1320 and the 1325, (step untill reaching a final picture of this pattern
It is rapid 1330).
In summary, the above embodiments of the present invention provide a kind of optic communication transmission and reception device and method, and
Optical communication system and method.This optical communication system includes a conveyer and a reception device.This conveyer produces the one of light
Or multiple patterns, and this pattern can form one or more shapes, to determine one or more reference zones；And from via one
Or multiple patterns determine to emit light to transmit signal in one or more reference zones.Under an obtaining mode, this reception device
The measurement of a small amount (the first quantity) for the pixel total amount than a sensing image is taken to carry out one or more patterns of detected light,
And the pattern detected according to one or more determines an at least ROI for a sensing image.Under a data receiver pattern, this
Reception device takes all signals in this at least ROI to handle optic communication.Under a tracking pattern, this reception device is taken
Thus conveyer transmitting is detected than the measurement of a small amount (the second quantity) for a pixel total amount of an at least trace regions
One or more patterns of the light gone out.Compared with existing optical communication technique, when optic communication is performed, the embodiment of the present invention can be with
Sampling rate is significantly increased and holding time is greatly decreased.
The embodiment of the present invention is the foregoing is only, when the scope implemented of the present invention can not be limited according to this.It is i.e. in every case of the invention
Equivalent variations and modification that claim is made, all should still belong to the scope that patent of the present invention covers.
Claims (29)
1. a kind of conveyer of optic communication, comprising：
One pattern generation unit, is configured as producing multiple patterns, to determine at least one or more reference zones, wherein described many
The sequence that individual pattern formation one is changed over time；
One optic communication LC control units, are connected to one conveyer-fundamental frequency processing unit, and the LC control units are from the transmission
Device-fundamental frequency processing unit selects it to input from the pattern generation unit；And
The institute launched in one light-emitting component, one or more reference zones determined from the multiple pattern or the multiple pattern
There is light to transmit data.
2. device according to claim 1, wherein one or more reference zones determined by the multiple pattern are recognized
One or more positions of the conveyer.
3. device according to claim 1, wherein one or more reference zones determined by the multiple pattern are to use
To transmit multiple signals of optic communication.
4. device according to claim 1, wherein when the conveyer is during a data are transmitted, LC controls are single
Member selects it to input from the conveyer-fundamental frequency processing unit for the multiple fundamental frequencies running for performing radio communication.
5. device according to claim 1, wherein when the conveyer is during a reference zone is indicated, LC controls
Unit processed selects it to input from the pattern generation unit.
6. device according to claim 1, the device also includes a driver element to drive the light-emitting component to launch light.
7. a kind of transfer approach of optic communication, this method is included：
Via a light-emitting component is used, during an at least cycle, transmit multiple patterns to determine one or more reference zones,
The sequence that wherein the multiple pattern formation one is changed over time；And
Using the light-emitting component, by all light for launching from one or more reference zones that the multiple pattern is determined come
Transmit data.
8. method according to claim 7, this method also includes：
Using an optic communication control unit, to select the multiple pattern to be inputted as it, or from performing the multiple of radio communication
One conveyer-fundamental frequency processing unit of fundamental frequency running selects it to input.
9. this in method according to claim 7, wherein one or more reference zones is just via more modulation side
The connection of one of formula-shut-off keying modulation system, is launched by a LED array.
10. method according to claim 7, wherein the multiple pattern is single with closing one via regularly connection
LED is formed.
11. a kind of reception device of optic communication, comprising：
One interest region ROI determining meanss, are configured as multiple patterns that detecting one senses the light in image, and according at least
Pattern on detection of determines an at least ROI, wherein the sequence that the multiple pattern formation one is changed over time；
One image sensing element, be configured as produce the sensing image, and according to the ROI determining meanss produce one output come
Light is sensed, the wherein image sensing element handles optic communication, all pixels using all pixels data of light in the ROI
Data are used to transmit data；And
One graphics processing unit, in this at least a ROI, image procossing is carried out according to the output of the image sensing element；
Wherein the ROI determining meanss measure to detect using the pixel total amount more than less amount of one first than the sensing image
The multiple pattern, more than first measurements include a variety of random combines of the pixel in the sensing image.
, should 12. device according to claim 11, the wherein reception device also include one receiver-fundamental frequency processing unit
Receiver-fundamental frequency processing unit is connected to the graphics processing unit, and performs at the fundamental frequency for restoring the data received
Reason.
13. every ROI of device according to claim 11, wherein an at least ROI comprising a region or it is multiple more
The Yi Lianji of zonule.
14. device according to claim 11, wherein graphics processing unit also use the picture than an at least trace regions
Plain total amount more than less amount of one second measures to follow the trail of the multiple pattern of the light received.
15. device according to claim 14, wherein more than second measurements include the picture in an at least trace regions
A variety of random combines of element.
16. a kind of method of reseptance of optic communication, comprising：
Under an obtaining mode, a pixel total amount less amount of one first for image is sensed using one than an image sensing element
Multiple measurements, to detect the multiple patterns received, and determine according to multiple patterns detected an at least interest region
ROI, wherein the sequence that the multiple pattern formation one is changed over time；And
Under a data receiver pattern, optic communication is handled using all pixels data of light in this at least a ROI, it is described all
Pixel data is used to transmit data；
Wherein more than first measurements include a variety of random combines of the pixel in the sensing image.
17. method according to claim 16, this method also includes：
Under a tracking pattern, measure to chase after using the pixel total amount more than less amount of one second than an at least trace regions
An at least position for the conveyer of track one.
18. method according to claim 17, wherein this method use one in the obtaining mode or the tracking pattern
Scheme detects any pattern of multiple patterns, and the program includes：
Whole lines in the sensing image are quantified as a parameter space, and derive an inverse conversion；
Using this first or this more than second measurements, and the orthogonal matching pursuit of the amendment of application one obtained in the parameter space
One or more parameters of the pattern, and this step is repeated, untill reaching a final picture of the pattern.
19. method according to claim 16, wherein in a variety of implementations, every ROI of an at least ROI is big
In or each reference zone of an at least reference zone for being less than or being determined equal to the multiple pattern.
20. every ROI of method according to claim 16, wherein an at least ROI comprising a region or it is multiple more
The Yi Lianji of zonule.
21. method according to claim 17, wherein more than second measurements include the picture in an at least trace regions
A variety of random combines of element.
22. a kind of optical communication system, comprising：
One conveyer, is configured as producing multiple patterns during an at least cycle determining an at least reference zone, and
And by emitting light to transmit data in one or more reference zones for determining from the multiple pattern, wherein the multiple pattern
Form a sequence changed over time；And
One reception device, is configured as detecting the multiple pattern, and determine at least one according to multiple patterns detected
Interest region ROI, then handles optic communication, all pixels data using all signals of the light in this at least a ROI
It is used to transmit data.
23. every ROI of system according to claim 22, wherein an at least ROI comprising a region or it is multiple more
The Yi Lianji of zonule.
24. system according to claim 22, the wherein reception device also use the pixel than an at least trace regions
The less amount of multiple the multiple patterns for measuring the light to follow the trail of conveyer transmitting of total amount.
25. system according to claim 24, wherein the plurality of measurement includes the pixel in an at least trace regions
A variety of random combines.
26. a kind of optical communication method, comprising：
In a conveyer, multiple patterns of light are produced during an at least cycle to determine an at least reference zone, and
And by emitting light to transmit data from least reference zone that the multiple pattern is determined, wherein the multiple pattern
Form a sequence changed over time；And
In a reception device, using more than less amount of one first measurements of a pixel total amount than a sensing image to detect
State multiple patterns, and determine according to the multiple patterns detected an at least interest region ROI, then using this at least one
All signals of light in ROI handle optic communication, and all pixels data are used to transmit data.
27. method according to claim 26, wherein this method also include：
At least reference zone determined using the multiple pattern recognizes one or more positions of the conveyer.
28. method according to claim 26, wherein this method also include：
In the reception device, measure to chase after using the pixel total amount more than less amount of one second than an at least trace regions
The multiple pattern of the light of track conveyer transmitting.
29. method according to claim 28, wherein more than first measurements include a variety of of the pixel of the sensing image
Random combine, and more than second measurements include a variety of random combines of the pixel in an at least trace regions.
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| US201261613477P | 2012-03-20 | 2012-03-20 | |
| US61/613,477 | 2012-03-20 | ||
| US13/671,085 US9450671B2 (en) | 2012-03-20 | 2012-11-07 | Transmitting and receiving apparatus and method for light communication, and the light communication system thereof |
| US13/671,085 | 2012-11-07 |
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| CN104393931B (en) * | 2014-11-17 | 2018-12-25 | 北京智谷睿拓技术服务有限公司 | Visible light signal reception control method, control device and receiving device |
| JP6693365B2 (en) * | 2016-09-20 | 2020-05-13 | カシオ計算機株式会社 | Notification device, notification method, and program |
| CN112166595B (en) * | 2019-11-29 | 2021-09-14 | 深圳市大疆创新科技有限公司 | Configuration method and device of shooting device |
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