CN104484488A - Shadow capturing device on basis of visible-light-communication technology - Google Patents
Shadow capturing device on basis of visible-light-communication technology Download PDFInfo
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- CN104484488A CN104484488A CN201410746531.5A CN201410746531A CN104484488A CN 104484488 A CN104484488 A CN 104484488A CN 201410746531 A CN201410746531 A CN 201410746531A CN 104484488 A CN104484488 A CN 104484488A
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Abstract
The invention discloses a shadow detecting and shadow information acquiring and processing device, and belongs to the technical field of visible-light-communication. The shadow detecting and shadow information acquiring and processing device is characterized in that light intensity signals of different regions are detected, light and shadow information is acquired and is converted into electric signals, the electric signals are preprocessed by a preprocessing circuit and are subjected to digital signal processing by programmable logic gate arrays to obtain digital signals, video graphics arrays can be ultimately selected for outputting the digital signals, and the digital signals can be outputted via universal serial buses or serial interfaces. The shadow detecting and shadow information acquiring and processing device has the advantages that the shadow detecting and shadow information acquiring and processing device can be applied to somatic games development and shadow play performance on screens; the shadow detecting and shadow information acquiring and processing device is high in shadow information acquiring speed and imaging speed owing to a visible-light-communication technology; the information is processed by the aid of the programmable logic gate arrays, accordingly, the shadow detecting and shadow information acquiring and processing device is high in efficiency and is speedy, and the communication interfaces can be selected.
Description
(1) technical field
The invention belongs to visible light communication (Visible-Light-Communication is abbreviated as VLC) technical field.
(2) background technology
Visible light communication utilizes the visible ray of wavelength between 400THz to 800THz (i.e. 780nm-375nm) as telecommunication media.So-called visible ray, is the electromagnetic wave under a kind of specific band in fact, relative to the electromagnetic wave under some other wave bands, has its peculiar property.First, visible ray is for body harmless.Secondly, visible ray has direct projection.Just because of the direct projection of visible ray, when opaque article has covered the propagation of light, can be formed can not through the comparatively dark areas of object, compared with dark areas namely our shadow of often saying.In addition, visible ray has reflectivity, when ray cast on a rough surface time, light can reflect to all directions, and this reflection, we are referred to as diffuse reflection.At everyday environments, there is not the diffuse reflection of visible ray all the time, therefore our common shadow arrived, neither completely unglazedly cause, and for no other reason than that the light of its region is more weak relative to other regions causes.
In common visible light communication system, at signal transmitting terminal, the light intensity of light source is modulated, thus generation light signal is launched.At receiving end, by detecting different light intensity, light signal being converted to electric signal, thus reaching the object of communication.Therefore, we, by detecting the light intensity under specific region, can detect the shadow information of object or person in this environment, and to information and process.
(3) summary of the invention
As seen from the above, the object of this invention is to provide a kind of detection method to shadow and shadow information acquisition, treating apparatus, the shadow in this environment and thing shadow can be detected under specific environment and condition, be translated into electric signal, and it gathered and processes.
To achieve these goals, the detection method to shadow of the present invention, concrete scheme is as follows:
By detecting the light intensity of shadow region, also light-intensity test is carried out to the region outside shadow simultaneously, the electric signal detecting gained is carried out Threshold detection, difference processing or compares process, obtain the stronger region of signal namely without territory, shadow zone, the region of the more weak even no signal of signal is dark region, i.e. shadow.
Shadow is detected and device to shadow information and process under present invention also offers a kind of specific environment and condition.
(4) accompanying drawing explanation
Fig. 1 is device schematic diagram of the present invention.
Fig. 2 is the experiment schematic diagram of Video Graphics Array of the present invention (VGA).
Fig. 3 is the experiment schematic diagram of USB (universal serial bus) of the present invention (USB).
Numeral in Fig. 1, Fig. 2, Fig. 3 represents following experiment apparatus respectively:
1-lens
2-photodetector array
3-pre-process circuit
4-programmable gate array circuit (FPGA) module
5-USB chip and usb interface module
6-USB turns Uart chip and usb interface module
7-VGA interface
8-Power supply
9-shelter
10-light source
11-computer monitor
The USB interface of 12-computer
(5) embodiment
Below in conjunction with specific experiment example and accompanying drawing, the present invention is illustrated.
As shown in Figure 1, the device general frame in the present invention, each parts are respectively described below:
Lens 1, for focusing on the face of photodetector array composition by shadow;
Shadow convert information for detecting shadow, and is electric signal by photodetector array 2;
Signal pre-processing circuit 3, carries out pre-service for the electric signal detected photodetector array;
Programmable gate array circuit module 4, carries out digital signal processing to pretreated electric signal;
USB chip and usb interface module 5, as reserved communication interface;
USB turns serial port chip and usb interface module 6, as reserved communication interface;
USB interface 7, for directly connecting computer monitor.
As shown in Figure 2, the VGA in the present invention tests schematic diagram, and experiment purpose the shadow gathering shelter is directly uploaded computer monitor show.Wherein:
Lens 1, for focusing on the face of photodetector array composition by shadow;
Shadow convert information for detecting shadow, and is electric signal by photodetector array 2;
Signal pre-processing circuit 3, carries out pre-service for the electric signal detected photodetector array;
Programmable gate array circuit module 4, carries out digital signal processing to pretreated electric signal;
USB interface 7, for directly connecting computer monitor;
Power supply 8, for powering for device;
Shelter 9, for generation of shadow;
Light source 10, for illumination;
Computer monitor 11, for receiving VGA signal, shows.
Fig. 3 is that the USB in the present invention tests schematic diagram, comprising:
Shadow convert information for detecting shadow, and is electric signal by photodetector array 2;
Signal pre-processing circuit 3, carries out pre-service for the electric signal detected photodetector array;
Programmable gate array circuit module 4, carries out digital signal processing to pretreated electric signal;
USB chip and usb interface module 5, as reserved communication interface;
Power supply 8, for powering for device;
The usb 12 of computer, is directly uploaded to computer by the digital signal obtained after FPGA process.
The course of work of the present invention is as follows:
Lens 1 receive shadow, are focused on by shadow on the face of photodetector array composition; By photodetector array 2, detecting shadow, and is electric signal by shadow convert information, unglazed direct irradiation, have the photoelectric detector in shadow region to produce weak current, have the photoelectric detector in light direct irradiation region then to produce relatively strong electric current; Through signal pre-processing circuit 3, pre-service is carried out to the electric signal that photodetector array detects, thresholding is arranged to electric signal and receives, amplify; Then, adopt programmable gate array circuit module 4, digital signal processing is carried out to pretreated electric signal; When selecting to be exported by Video Graphics Array, being connected with USB interface 7, directly connecting computer monitor 11, receive VGA signal and show; When selecting to be exported by USB (universal serial bus), being connected with USB chip and usb interface module 5, by the usb 12 of computer, the digital signal obtained after FPGA process being directly uploaded to computer; USB turns serial port chip and usb interface module 6, as reserved communication interface; Power supply 8, for powering for device; Shelter 9, for generation of shadow; Light source 10, for illumination.
(6) major technique advantage
The present invention can realize, to the detection of shadow information and shadow information acquisition, process, the information after process directly being uploaded computer monitor and showing.The present invention adopts visible light communication technology, and shadow information acquisition speed is fast, and image taking speed is fast; Adopt programmable gate array to carry out information processing, efficiently, fast, and communication interface is optional, can be applicable to somatic sensation television game exploitation and fluorescent screen shadow play performing etc.
Claims (2)
1., to the detection of shadow information and shadow information acquisition, a treating apparatus, for gathering shadow information, and be converted into digital signal, and the uploading of data-signal under realizing each class interface, it is characterized in that the course of work of described device comprises the following steps:
Shadow focuses on photodetector array face by lens;
Shadow information is converted to electric signal by photodetector array;
Electric signal pretreatment module arranges thresholding to electric signal and receives, amplifies;
The electric signal that programmable gate array collection electric signal pretreatment module obtains carries out digital signal processing, selectivity output digit signals.
2. a kind of detection to shadow information and shadow information acquisition as claimed in claim 1, treating apparatus, is characterized in that comprising:
Lens, for focusing on shadow;
Photodetector array, is converted to electric signal for detecting shadow information;
Pre-process circuit, for carrying out pre-service to the electric signal of photodetector array;
Programmable gate array, for pretreated for pre-process circuit electric signal is carried out digital signal processing, is selected by Video Graphics Array, USB (universal serial bus) or is exported by serial ports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410746531.5A CN104484488A (en) | 2014-12-09 | 2014-12-09 | Shadow capturing device on basis of visible-light-communication technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410746531.5A CN104484488A (en) | 2014-12-09 | 2014-12-09 | Shadow capturing device on basis of visible-light-communication technology |
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| CN104484488A true CN104484488A (en) | 2015-04-01 |
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| CN201410746531.5A Pending CN104484488A (en) | 2014-12-09 | 2014-12-09 | Shadow capturing device on basis of visible-light-communication technology |
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Citations (4)
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|---|---|---|---|---|
| CN1477602A (en) * | 2002-08-21 | 2004-02-25 | 厦门影迪软件有限公司 | Animation production method and device |
| CN1632833A (en) * | 2005-01-05 | 2005-06-29 | 赵忠胜 | Method for making animated cartoon using shadow play based show image |
| CN101266530A (en) * | 2008-04-04 | 2008-09-17 | 中国海洋大学 | Large-screen three-dimensional measuring touch screen |
| CN201213634Y (en) * | 2008-03-04 | 2009-04-01 | 英华达（南京）科技有限公司 | Electric device capable of automatically controlling display screen to display digital image |
-
2014
- 2014-12-09 CN CN201410746531.5A patent/CN104484488A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1477602A (en) * | 2002-08-21 | 2004-02-25 | 厦门影迪软件有限公司 | Animation production method and device |
| CN1632833A (en) * | 2005-01-05 | 2005-06-29 | 赵忠胜 | Method for making animated cartoon using shadow play based show image |
| CN201213634Y (en) * | 2008-03-04 | 2009-04-01 | 英华达（南京）科技有限公司 | Electric device capable of automatically controlling display screen to display digital image |
| CN101266530A (en) * | 2008-04-04 | 2008-09-17 | 中国海洋大学 | Large-screen three-dimensional measuring touch screen |
Non-Patent Citations (1)
| Title |
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| 金刚等: "表演动画中的运动捕捉技术", 《中国图像图形学报》 * |
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Application publication date: 20150401 |
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