CN107219517A - Mobile phone Android camera alignment system and its method based on LED visible light communication - Google Patents
Mobile phone Android camera alignment system and its method based on LED visible light communication Download PDFInfo
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- CN107219517A CN107219517A CN201710609373.2A CN201710609373A CN107219517A CN 107219517 A CN107219517 A CN 107219517A CN 201710609373 A CN201710609373 A CN 201710609373A CN 107219517 A CN107219517 A CN 107219517A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
- G01S11/12—Systems for determining distance or velocity not using reflection or reradiation using electromagnetic waves other than radio waves
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Abstract
The invention discloses a kind of mobile phone Android camera alignment system based on LED visible light communication and its localization method, the alignment system includes LED visible light communication module, signal receiving module and mobile phone positioning software module, LED visible light communication module includes LED, mobile phone visible light communication signal receiving module includes the visible light communication camera that exploitation is obtained, visible light communication camera includes the single camera and camera system on mobile phone, and mobile phone positioning software module is included in the cell-phone customer terminal APP softwares comprising location algorithm run under mobile phone Android system.The present invention downloads in cell-phone customer terminal and obtains indoor positioning App, directly it can be shot afterwards using camera system, corresponding modulation intelligence in LED is obtained by the flicker for scanning LED, decoding determines the position of lamp, and then by location algorithm and calculate the specific exact position of cell-phone customer terminal and include result on mobile phone A pp, so as to realize indoor positioning.
Description
Technical field
The invention belongs to location systems art field, a kind of mobile phone based on LED visible light communication is particularly related to
Android camera alignment system and its localization method.
Background technology
In recent years, the semi-conductor LED illuminating technology development for being described as " green illumination " is swift and violent, with conventional illumination sources phase
Than white light LEDs are not only low in energy consumption, service life length, size are small, environmental protection, with more modulating performance is good and response sensitivity
High the advantages of., can also be in signal modulation to LED visible light beam while it can serve as illumination using LED this characteristic
Carry out data transmission, information is sent to client from light fixture, realize a kind of emerging light wireless communication technology, you can see that light leads to
Letter technology.Because visible ray is closely bound up with daily life, many equipment in office, family and public arena contain can
See radiant, convenient data, services anywhere or anytime can be provided for indoor user.
As various synthesis classes build the appearance of such as shopping mall, Large-sized Communication terminal, the activity of people
Space is more and more huger and complexity, and then also increasingly strong to the demand of indoor positioning and navigation；Meanwhile, precision marketing, intelligence
The industries such as storage, robot, Sanatorium nursing are also required to obtain the Indoor Location Information of special object using location technology；And GPS
Satellite-signal be indoors it is very faint even without, it is impossible to meet the accuracy requirement of indoor positioning, these demands for interior
Location technology brings great opportunity.
Indoor positioning technologies scheme in currently available technology includes A-GPS location technologies, ultrasonic wave location technology, bluetooth
Technology, infrared technology, REID, super-broadband tech, WLAN, light track and localization technology, and image
Analysis, beacon positioning, computer vision location technology etc..These indoor positioning technologies can be summarized as several classes on the whole, i.e.,
GNSS technologies, such as pseudo satellite, pseudolite；Wireless location technology, including the tracking of wireless communication signals, wireless radiofrequency label, ultrasonic wave, light,
Wireless senser location technology etc.；Other location technologies such as computer vision, dead reckoning etc.；And GNSS and wireless location group
The location technology of conjunction such as A-GPS or A-GNSS.
At present, the research both at home and abroad to the location technology based on LED visible light is divided into non-imaged location technology and imaging is fixed
Two kinds of the technology in position.Non-imaged location technology uses traditional localization method, using multi-multipoint communication, based on away from walk-off angle
Degree is positioned；Location technology is imaged using flash lamp, display, optical sensor etc. as transceiving device, it is variable to realize
The functions such as rate communication, location navigation and message broadcast.Non-imaged location technology is realized based on special photodetector
Detection to LED, mainly there is 4 kinds of implementation methods：Triangulation, scenario analysis, mix close to method and VLC and Ad Hoc
Method；Imaging alignment system based on visible ray, the three-dimensional coordinate from LED transmittings is used by imaging sensor demodulating information
The geometric distance relation of the LED image received in imaging sensor calculates the position of target.Imaging based on visible ray is determined
Position system can be divided into the forms such as single lamp single camera, double lamp single cameras and single lamp dual camera, utilize different positioning methods
Middle imaging sensor receives the different distance geometrical relationship of LED image to calculate the position of target.
High speed development and progress with science and technology, the development of smart mobile phone are more and more faster, more press close to the life of people, hand
Machine function is also stronger and stronger, and this series of phenomenon shows the arrival in smart mobile phone big epoch, and is continuing to send out at a high speed
Exhibition, mobile phone A PP exploitation is also to be becoming increasingly popular.And the indoor positioning technologies based on LED visible light communication do not have in the past
Developed with reference to the single camera on mobile phone and mobile phone Android system.
The content of the invention
There is provided the visible light communication camera that a kind of exploitation is obtained in order to overcome the shortcomings of prior art presence by the present invention
The alignment system based on LED visible light communication and its localization method of Android App exploitations are carried out, it passes through calling mobile phone camera
The shooting of camera system determines position of the cell-phone customer terminal relative to LED, and the LED light signal that shooting is obtained is solved
Code, then accurately positioned by location algorithm and calculating.
The present invention is achieved by the following technical solutions：A kind of mobile phone Android camera based on LED visible light communication is determined
Position system, the alignment system include be sequentially connected LED visible light communication module, mobile phone visible light communication signal receiving module and
Mobile phone positioning software module, LED visible light communication module includes LED, and the illumination that LED is mounted in known coordinate position is set
Standby, mobile phone visible light communication signal receiving module includes the visible light communication camera that exploitation is obtained, it is seen that optic communication camera includes
Single camera and camera system on mobile phone；Mobile phone positioning software module be included in run under mobile phone Android system comprising fixed
The cell-phone customer terminal APP softwares of position algorithm.
A kind of localization method of the mobile phone Android camera alignment system based on LED visible light communication, the localization method is specific
Comprise the following steps：LED picture is shot by mobile phone terminal visible light communication camera first, the positional information of LED is modulated to
In the flicker of LED, LED is transmitting terminal, and the visible light communication camera that the exploitation of calling mobile phone single camera is obtained is reception
End；Receiving terminal obtains the modulation intelligence in LED, image by camera system calling mobile phone camera progress progressive scan photographing
Processing obtains data field bar graph, shows as the light and shade bar graph that camera system shoots obtained LED image, then application program
Data field bar graph is decoded, and this decoded result obtain to should LED positional information；It is based on afterwards according to interior
The localization method of optical imagery, and the position of gained LED lamp is decoded, finally giving mobile phone by application program progress calculating connects
The accurately located position of receiving end.
Each LED is controlled by a drive circuit, and LED is sent according to spy while general lighting function is realized
Determine the high frequency flicker light that mode is encoded, high frequency flicker light is to should the unique position encoded information of lamp；LED is by its positional information
It is modulated into after high frequency flicker signal launches, the receiving terminal of mobile phone visible light communication signal receiving module is by can calling mobile phone
The visible light communication camera of camera carries out the modulation intelligence that progressive scan photographing obtains LED, and decoding obtains the LED
Positional information, the accurately located position of mobile phone receiving terminal is calculated finally according to location algorithm.
The change that LED is launched in continuous different time points can be shot by developing obtained visible light communication camera
Optical signal, changes into the light and shade striped of spatially consecutive variations, and be embodied in same Zhang Zhao by the optical signal of these changes
On piece, while the visible light communication camera can change camera parameter as needed by program setting.
Any one camera carried on mobile phone is controlled to shoot to include LED in the image of LED, image by camera system
The position encoded information of lamp transmitting, or the image pickup mode of opening camera system carry out preview to LED, and control program is to LED
The high frequency flicker light of lamp transmitting carries out real-time reception processing, obtains the position encoded information of LED transmitting.
The cell-phone customer terminal APP softwares comprising location algorithm run under mobile phone Android system can be under Android system
The LED image that the camera system of calling mobile phone single camera is photographed is handled and decoded, corresponding LED position is obtained
Coordinate is put, the three-dimensional location coordinates of camera are further calculated by the location algorithm of single camera pattern.
The present invention is compared with conventional radio frequency wireless technology, it is seen that the available bandwidth range of optic communication is big, with higher
Security and privacy, do not produce electromagnetic interference, without the permission of corresponding band, can be realized with relatively low cost high
The radio communication access of bandwidth high-speed, with good spatial reuse, is greatly expanded the coverage rate of network, is to existing
There is the good supplement of radio-frequency technique.
The present invention obtains the present invention by a series of Android development procedures, in cell-phone customer terminal download, and this can based on LED
See the indoor positioning App of optic communication, afterwards can be directly using the exploitation camera system of single camera can carrying out on calling mobile phone
Shoot, corresponding modulation intelligence in LED is obtained by the flicker for scanning LED, decoded so that it is determined that the position of lamp, Jin Ertong
Cross location algorithm and calculate the specific exact position of cell-phone customer terminal and include result on mobile phone A pp, so that real
Existing indoor positioning.
The beneficial effects of the invention are as follows：The present invention determines mobile phone visitor by the shooting of calling mobile phone camera camera system
Family end is decoded relative to the position of LED to the LED light signal that shooting is obtained, then by location algorithm and calculates progress
Accurate positioning.Positioning System of the present invention based on LED visible light communication is high, and bandwidth resources are abundant, are not required to
The mandate of management organization is obtained, and alignment system in the present invention will not produce any electromagnetic interference, be not easy to by external electrical
The influence of magnetic disturbance, positioning precision is high, can be widely applied to the special occasions sensitive to electromagnetic interference, such as hospital and gas station
Deng.Alignment system in the present invention does light source using LED, takes into account illumination and positioning, and this technology is once molded and just can applied quickly
Into daily life.The exploitation of mobile phone Android camera alignment system based on LED visible light communication so that client is directly used
Mobile phone-downloaded App, the camera system progress for calling mobile phone camera of exploitation is taken pictures and can positioned, so that
The application being positioned in life more facilitates.
Brief description of the drawings
Fig. 1 is the workflow diagram of mobile phone Android camera alignment system of the present invention；
Fig. 2 is the system schematic of mobile phone Android camera alignment system of the present invention；
Fig. 3 is that the indoor positioning of mobile phone Android camera alignment system of the present invention calculates space schematic diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
As shown in Figure 1 to Figure 2, a kind of mobile phone Android camera alignment system based on LED visible light communication, the alignment system
Including the LED visible light communication module being sequentially connected, mobile phone visible light communication signal receiving module and mobile phone positioning software module,
LED visible light communication module includes LED, and LED is mounted in the lighting apparatus of known coordinate position, mobile phone visible light communication
Signal receiving module includes the visible light communication camera that exploitation is obtained, it is seen that optic communication camera includes the single camera on mobile phone
And camera system；Mobile phone positioning software module is included in the cell-phone customer terminal for including location algorithm run under mobile phone Android system
APP softwares.
A kind of localization method of the mobile phone Android camera alignment system based on LED visible light communication, the localization method is specific
Comprise the following steps：LED picture is shot by mobile phone terminal visible light communication camera first, the positional information of LED is modulated to
In the flicker of LED, LED is transmitting terminal, and the visible light communication camera that the exploitation of calling mobile phone single camera is obtained is reception
End；Receiving terminal obtains the modulation intelligence in LED, image by camera system calling mobile phone camera progress progressive scan photographing
Processing obtains data field bar graph, shows as the light and shade bar graph that camera system shoots obtained LED image, then application program
Data field bar graph is decoded, and this decoded result obtain to should LED positional information；It is based on afterwards according to interior
The localization method of optical imagery, and the position of gained LED lamp is decoded, finally giving mobile phone by application program progress calculating connects
The accurately located position of receiving end.
Each LED is controlled by a drive circuit, and LED is sent according to spy while general lighting function is realized
Determine the high frequency flicker light that mode is encoded, high frequency flicker light is to should the unique position encoded information of lamp；LED is by its positional information
It is modulated into after high frequency flicker signal launches, the receiving terminal of mobile phone visible light communication signal receiving module is by can calling mobile phone
The visible light communication camera of camera carries out the modulation intelligence that progressive scan photographing obtains LED, and decoding obtains the LED
Positional information, the accurately located position of mobile phone receiving terminal is calculated finally according to location algorithm.Obtained visible ray is developed to lead to
Letter camera can shoot the optical signal for the change that LED is launched in continuous different time points, by the optical signal of these changes
The light and shade striped of spatially consecutive variations is changed into, and is embodied on same photo, while the visible light communication camera
Camera parameter can be changed by program setting as needed.
Any one camera carried on mobile phone is controlled to shoot to include LED in the image of LED, image by camera system
The position encoded information of lamp transmitting, or the image pickup mode of opening camera system carry out preview to LED, and control program is to LED
The high frequency flicker light of lamp transmitting carries out real-time reception processing, obtains the position encoded information of LED transmitting.In mobile phone Android system
The cell-phone customer terminal APP softwares comprising location algorithm of lower operation can be under Android system to calling mobile phone single camera phase
Machine system photographs to LED image handled and decoded, corresponding LED position coordinates is obtained, further by singly taking the photograph
As the location algorithm of head mould formula calculates the three-dimensional location coordinates of camera.
As shown in figure 3, Fig. 3 calculates space schematic diagram, hand for the indoor positioning of mobile phone Android camera alignment system of the present invention
The computational methods of machine client indoor positioning are as follows：
The location algorithm used in the present invention is one group of ranging formula based on single camera optical imagery, if single led
Position coordinates (X, Y, Z) of the lamp under environment space coordinate system, mobile phone single camera focal length f, single camera pixel planes center
Coordinate (x0, y0), two end points of LED in pixel planes coordinate system is after imaging in the seat of camera pixel planes coordinate system
Mark (x1, y1), (x2, y2), the distance of LED center and pixel faces center in Yw directions is Yc, LED center with pixel faces
The heart Xw directions distance be Xc, calculate camera pixel planes center under environment space coordinate system coordinate (x0, y0,
z0)。
It can be drawn by similar triangles characteristic：
In above formula h be LED to camera lens vertical range, h can be tried to achieve by above formula, then, mobile phone camera pixel faces center
Space coordinate (x0, y0, z0) can be expressed as indoors：
Z0=Z-h-f；
Write by above formula calculation formula and algorithm, the 3D that can realize cell phone customer end position by mobile phone single camera determines
Position.
Finally it should be noted that above content is merely illustrative of the technical solution of the present invention, rather than to present invention protection
The limitation of scope, simple modification or equivalent substitution that one of ordinary skill in the art is carried out to technical scheme,
All without departing from the spirit and scope of technical solution of the present invention.
Claims (6)
1. a kind of mobile phone Android camera alignment system based on LED visible light communication, it is characterised in that：The alignment system includes
LED visible light communication module, mobile phone visible light communication signal receiving module and the mobile phone positioning software module being sequentially connected, it is described
LED visible light communication module includes LED, and the LED is mounted in the lighting apparatus of known coordinate position, and the mobile phone can
See that optic communication signal receiving module includes the visible light communication camera that exploitation is obtained, the visible light communication camera is included on mobile phone
Single camera and camera system；The mobile phone positioning software module be included in run under mobile phone Android system comprising positioning
The cell-phone customer terminal APP softwares of algorithm.
2. the localization method of the mobile phone Android camera alignment system according to claim 1 based on LED visible light communication, its
It is characterised by：The localization method specifically includes following steps：LED figure is shot by mobile phone terminal visible light communication camera first
Piece, the positional information of LED is modulated in the flicker of LED, and LED is transmitting terminal, the exploitation of calling mobile phone single camera
Obtained visible light communication camera is receiving terminal；Receiving terminal carries out progressive scan photographing by camera system calling mobile phone camera
The modulation intelligence in LED is obtained, image procossing obtains data field bar graph, show as camera system and shoot obtained LED figures
The light and shade bar graph of picture, then application program is decoded to data field bar graph, and this decoded result is obtained to should LED
Positional information；Afterwards according to localization method of the interior based on optical imagery, and the position of gained LED lamp is decoded, by answering
Carried out calculating the accurately located position for finally giving mobile phone receiving terminal with program.
3. the localization method of the mobile phone Android camera alignment system according to claim 2 based on LED visible light communication, its
It is characterised by：Each LED is controlled by a drive circuit, LED sent while general lighting function is realized according to
The high frequency flicker light of ad hoc fashion coding, high frequency flicker light is to should the unique position encoded information of lamp；LED believes its position
Breath is modulated into after high frequency flicker signal launches, and the receiving terminal of mobile phone visible light communication signal receiving module is by that can call hand
The visible light communication camera of machine camera carries out the modulation intelligence that progressive scan photographing obtains LED, and decoding obtains the LED
Positional information, the accurately located position of mobile phone receiving terminal is calculated finally according to location algorithm.
4. the localization method of the mobile phone Android camera alignment system according to claim 2 based on LED visible light communication, its
It is characterised by：The obtained visible light communication camera of developing can shoot what LED was launched in continuous different time points
The optical signal of change, the light and shade striped of spatially consecutive variations is changed into by the optical signal of these changes, and is embodied in same
On one photo, while the visible light communication camera can change camera parameter as needed by program setting.
5. the localization method of the mobile phone Android camera alignment system according to claim 2 based on LED visible light communication, its
It is characterised by：Any one camera carried on mobile phone is controlled to shoot in the image of LED, described image to wrap by camera system
The position encoded information launched containing LED, or the image pickup mode of camera system is opened to LED progress preview, control program
Real-time reception processing is carried out to the high frequency flicker light that LED is launched, the position encoded information of LED transmitting is obtained.
6. the localization method of the mobile phone Android camera alignment system according to claim 2 based on LED visible light communication, its
It is characterised by：The cell-phone customer terminal APP softwares comprising location algorithm run under mobile phone Android system can be in Android system
Under the LED image that the camera system of calling mobile phone single camera is photographed is handled and decoded, obtain corresponding LED
Position coordinates, further calculates the three-dimensional location coordinates of camera by the location algorithm of single camera pattern.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108471329A (en) * | 2018-02-05 | 2018-08-31 | 杭州电子科技大学 | A kind of system architecture in visible light communication system based on LED and mobile phone camera |
| CN108551366A (en) * | 2018-02-05 | 2018-09-18 | 杭州电子科技大学 | A kind of visible light communication method based on LED and mobile phone camera |
| CN109008806A (en) * | 2018-06-25 | 2018-12-18 | 东莞市光劲光电有限公司 | A kind of sweeping robot positioning system and method based on the positioning of LED intelligent lamp |
| CN109063212A (en) * | 2018-09-28 | 2018-12-21 | 西北工业大学 | A kind of intelligence auxiliary purchase guiding system and method based on visible light communication |
| CN109341687A (en) * | 2018-06-01 | 2019-02-15 | 上海大学 | It is a kind of based on mobile phone any level towards single LED visible light communication indoor orientation method of angle |
| CN109696176A (en) * | 2017-10-24 | 2019-04-30 | 珠海横琴华策光通信科技有限公司 | A kind of inertial navigation localization method based on LED light emission device light-seeking correction |
| CN109725286A (en) * | 2018-12-19 | 2019-05-07 | 上海大学 | A kind of single LED visible light communication indoor orientation method based on mobile phone any direction angle |
| CN110133685A (en) * | 2019-05-22 | 2019-08-16 | 吉林大学 | Street lamp based on OCC assists the detailed location of communication system of mobile phone |
| WO2019174213A1 (en) * | 2018-03-14 | 2019-09-19 | Boe Technology Group Co., Ltd. | Positioning method, positioning apparatus, and computer-program product |
| CN110261823A (en) * | 2019-05-24 | 2019-09-20 | 南京航空航天大学 | Visible light indoor communications localization method and system based on single led lamp |
| CN110346784A (en) * | 2018-04-02 | 2019-10-18 | 珠海横琴华策光通信科技有限公司 | A method of based on LED lamp light-seeking and directional wheel integrated positioning |
| CN111103579A (en) * | 2020-01-15 | 2020-05-05 | 长安大学 | Visible light indoor positioning system and method based on mobile phone camera |
| CN112564796A (en) * | 2020-11-25 | 2021-03-26 | 重庆邮电大学 | Equipment payment information interaction system based on visible light wireless communication |
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| CN109696176A (en) * | 2017-10-24 | 2019-04-30 | 珠海横琴华策光通信科技有限公司 | A kind of inertial navigation localization method based on LED light emission device light-seeking correction |
| CN108551366A (en) * | 2018-02-05 | 2018-09-18 | 杭州电子科技大学 | A kind of visible light communication method based on LED and mobile phone camera |
| CN108471329A (en) * | 2018-02-05 | 2018-08-31 | 杭州电子科技大学 | A kind of system architecture in visible light communication system based on LED and mobile phone camera |
| WO2019174213A1 (en) * | 2018-03-14 | 2019-09-19 | Boe Technology Group Co., Ltd. | Positioning method, positioning apparatus, and computer-program product |
| US11340074B2 (en) | 2018-03-14 | 2022-05-24 | Boe Technology Group Co., Ltd. | Positioning method, positioning apparatus, and computer-program product |
| CN110274594B (en) * | 2018-03-14 | 2021-04-23 | 京东方科技集团股份有限公司 | Indoor positioning equipment and method |
| CN110274594A (en) * | 2018-03-14 | 2019-09-24 | 京东方科技集团股份有限公司 | A kind of indoor positioning device and method |
| CN110346784A (en) * | 2018-04-02 | 2019-10-18 | 珠海横琴华策光通信科技有限公司 | A method of based on LED lamp light-seeking and directional wheel integrated positioning |
| CN109341687A (en) * | 2018-06-01 | 2019-02-15 | 上海大学 | It is a kind of based on mobile phone any level towards single LED visible light communication indoor orientation method of angle |
| CN109008806A (en) * | 2018-06-25 | 2018-12-18 | 东莞市光劲光电有限公司 | A kind of sweeping robot positioning system and method based on the positioning of LED intelligent lamp |
| CN109063212A (en) * | 2018-09-28 | 2018-12-21 | 西北工业大学 | A kind of intelligence auxiliary purchase guiding system and method based on visible light communication |
| CN109725286A (en) * | 2018-12-19 | 2019-05-07 | 上海大学 | A kind of single LED visible light communication indoor orientation method based on mobile phone any direction angle |
| CN110133685A (en) * | 2019-05-22 | 2019-08-16 | 吉林大学 | Street lamp based on OCC assists the detailed location of communication system of mobile phone |
| CN110261823A (en) * | 2019-05-24 | 2019-09-20 | 南京航空航天大学 | Visible light indoor communications localization method and system based on single led lamp |
| CN110261823B (en) * | 2019-05-24 | 2022-08-05 | 南京航空航天大学 | Visible light indoor communication positioning method and system based on single LED lamp |
| CN111103579A (en) * | 2020-01-15 | 2020-05-05 | 长安大学 | Visible light indoor positioning system and method based on mobile phone camera |
| CN112564796A (en) * | 2020-11-25 | 2021-03-26 | 重庆邮电大学 | Equipment payment information interaction system based on visible light wireless communication |
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