CN1632736A - Photoelectric positioning device for interactive electronic writing display system and calibration method thereof - Google Patents
Photoelectric positioning device for interactive electronic writing display system and calibration method thereof Download PDFInfo
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- CN1632736A CN1632736A CNA2004100773896A CN200410077389A CN1632736A CN 1632736 A CN1632736 A CN 1632736A CN A2004100773896 A CNA2004100773896 A CN A2004100773896A CN 200410077389 A CN200410077389 A CN 200410077389A CN 1632736 A CN1632736 A CN 1632736A
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- clipboard
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- positioning apparatus
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Abstract
This invention discloses a photoelectricity positioning device and its calibration method used in electronic writing system, which comprises writing board, writing pen, and photoelectricity detecting devices used to catch the writing positions. The said detecting device is set behind o r in front of the writing board and direct forms the board image through forming wave and records the writing pen position in the board. It converts the image of the writing pen position into digit information through electronic process. The processed information can be real-time displayed on the projecting screen through signal process.
Description
Technical field
The present invention relates to a kind of photoelectric positioning apparatus, relate in particular to a kind of photoelectric positioning apparatus that is used for interactive electronic writing display system.The invention still further relates to the calibration steps of this photoelectric positioning apparatus.
Background technology
Along with the continuous expansion that computer technology is used, the application of electronic writing system is in recent years developed rapidly, the especially appearance of interactive electric whiteboard, and the development with electronic writing system has advanced major step especially.The lettering pen location technology that present interactive electric whiteboard is adopted mainly contains: resistance-type location, condenser type location, electromagnetic type location, ultrasonic locating and infrared location technology etc.The common drawback that they exist is system complex, cost height, poor reliability.Though the infrared location technology that some companies adopt also belongs to the category of photoelectricity location, but adopt all be writing/display board around a plurality of infrared detector cells are installed, utilize electronic processing to carry out the method for synthesis analysis location then, therefore cost is higher, precise decreasing, reliability also reduce greatly.
Summary of the invention
The object of the present invention is to provide a kind of adopt the photoelectronic imaging principle, simple in structure, bearing accuracy is high, the photoelectric positioning apparatus that is used for interactive electronic writing display system of good reliability; Another object of the present invention is to provide a kind of calibration steps of this photoelectric positioning apparatus.
Purpose of the present invention is achieved by the following technical programs:
The invention provides a kind of photoelectric positioning apparatus that is used for interactive electronic writing display system, comprise clipboard, lettering pen and be used to catch the photoelectric detector of lettering pen position, described photoelectric detector is arranged at the rear or the place ahead on clipboard plane, directly to the clipboard imaging, write down the location drawing picture of lettering pen on clipboard through the imaging light wave.Utilize image process method, from the image of record lettering pen position, extract the position digital information of lettering pen, follow the tracks of its motion track, and be converted into corresponding graph text information for other logging software use.Resulting graph text information can be added in the data of display system and can synchronously show by display device by signal handling equipment.
Photoelectric detector of the present invention is arranged on the rear of clipboard, and clipboard can see through the imaging light wave.Described photoelectric detector is arranged on the place ahead of clipboard, and this moment, clipboard can be any flat board just, and need not to see through the imaging light wave.Imaging light wave of the present invention is infrared ray, visible light or ultraviolet light.
Lettering pen of the present invention is the photoelectric pen that has the light wave transmitter, for example can launch infrared ray, also can be laser pen etc.Described lettering pen also can be the form of a stroke or a combination of strokes thing that has the specific identification sign, for example is the spillikin that has certain special color, or the rear end has (as pentagram) lip pencil thing of certain special geometric configuration.
Clipboard of the present invention is can display image and the display board or the display screen of information, also can be common blank or blackboard.
Be provided with the optical device that is used to form required light path between clipboard of the present invention and the photoelectric detector, be convenient to be provided with flexibly the position of photoelectric detector.
Can filter the filtering device that disturbs light wave in order further to improve imaging definition, to be provided with in the imaging optical path between clipboard of the present invention and the photoelectric detector.
When photoelectric detector resolution characteristic or investigative range were not enough, photoelectric detector of the present invention also can have more than two or two, and the imaging region of many photoelectric detectors can be overlapped, also can separate fully.
The calibration steps of photoelectric positioning apparatus of the present invention, on described clipboard (also being display screen), demonstrate the calibration pattern with the display device of using in the system, after photoelectric detector captures these calibration patterns, by calculating the positional information of determining these calibration patterns, the positional information of these calibration patterns is become the correction data of lettering pen location with the formal transformation of form, so that the position of lettering pen accurately overlaps with the position of display image, finish accurate location to lettering pen.
Adopt the point by point scanning mode in the calibration steps of the present invention, the display device of using in the system will be calibrated pattern and will be shown to one by one on the clipboard, and photoelectric detector is followed the tracks of one by one and surveyed the location, realizes full frame calibration.
Adopt full frame parallel mode in the calibration steps of the present invention, the display device of using in the system will be calibrated pattern and all will be shown on the clipboard, and full frame calibration is finished in the disposable detection of photoelectric detector location.
The present invention has following beneficial effect:
(1) simple in structure, with low cost: the lettering pen that uses a photoelectric detector just can finish in the clipboard scope is located and is followed the tracks of, and Installation and Debugging are convenient.
(2) computing is easy: owing to use a photoelectric detector directly to the clipboard position sensing, geometric position and locator data corresponding relation are simple, and it is easier that processing is followed the tracks of in the location, and precision is higher.
(3) reliability height: because system architecture is simple, the computing link is less, has improved the reliability of system.
(4) calibration automatically: can use automatic calibrating method to carry out self calibration easily, improve bearing accuracy.
Description of drawings
Fig. 1 is one of principle of the invention synoptic diagram;
Fig. 2 is two of a principle of the invention synoptic diagram;
Fig. 3 is three of a principle of the invention synoptic diagram;
Fig. 4 is four of a principle of the invention synoptic diagram;
Fig. 5 is five of a principle of the invention synoptic diagram;
Fig. 6 is that one of embodiment of the invention is used for the structural representation in the rear-projection display unit;
Fig. 7 is that two of the embodiment of the invention is used for the structural representation in the rear-projection display unit;
Fig. 8 is the self calibration principle schematic that is used in the rear-projection display unit.
Embodiment
Figure 6 shows that one of embodiments of the invention that are used in the rear-projection display unit, the photoelectric positioning apparatus of present embodiment comprises clipboard 101, photoelectricity lettering pen 102 and is used to catch the photoelectronic imaging device 103 of lettering pen position, the rear-projection display unit also comprises light engine 105, electronic processing unit 104 and the housing 106 that produces displayed image, wherein clipboard 101 also is the screen of Display projector image simultaneously, can show the formed picture and text of lettering pen track synchronously.Electronic processing unit 104 adopts image process method to calculate the digital positional information of lettering pen from the image of photoelectronic imaging device collection, and the position of following the tracks of lettering pen moves, and converts its track to corresponding graph text information.Light engine 105, photoelectronic imaging device 103 and electronic processing unit 104 are arranged in the housing 106 and are in the rear of projection screen (also being clipboard) 101, wherein the position of light engine 105 and the photoelectronic imaging device 103 middle part image space of photoelectronic imaging device and clipboard as shown in Figure 1 that is positioned at projection screen 101 rears.Projection screen 101 can see through infrared waves to 103 of photoelectronic imaging devices to the infrared waves imaging, and photoelectronic imaging device 103 is directly to projection screen 101 position imagings.Infrared waves can be launched in the end of photoelectricity lettering pen 102, and its luminescent device also can be driven by being installed in front end solar panel on every side by battery or rechargeable battery power supply; Lettering pen can leave the clipboard use like this, and can not influence its effect.The button of pressure transducer and execution mouse function also can be set on the lettering pen 102.
In addition, when photoelectronic imaging device resolution characteristic or investigative range were not enough, the photoelectronic imaging device also can have more than two or two, and the imaging region of many photoelectronic imaging devices can be separated from each other (as shown in Figure 5).The imaging region of photoelectronic imaging device also can be overlapped.
Figure 7 shows that two of the embodiments of the invention that are used in the rear-projection unit, be with embodiment one difference: light engine 105 and photoelectronic imaging device 103 are arranged on the bottom in the housing 106, and the position in housing 106 above the rear of clipboard 101 and the photoelectronic imaging device 103 is provided with catoptron 107.The imaging light wave of projected light that light engine 105 sends and lettering pen 102 can be through the reflection of catoptron 107, and photoelectronic imaging device 103 carries out imaging by catoptron to projection screen.According to the installation site that makes things convenient for of photoelectronic imaging device, also available other optical device form required light path, and projection screen and lettering pen thereof are imaged onto on the photoelectronic imaging device in the position on the projection screen.
In addition, too optical filter can be set in the imaging optical path between projection screen 101 and photoelectronic imaging device 103, disturb light wave, improve imaging definition and survey degree of accuracy in order to filter.
The projecting cell of writing by embodiment one or two, be stitched together according to the capable mode of M row N, form the screen splicing wall of M * N and write display system, when lettering pen 102 is striden the unit use, stride the screen processing by processor by synthetic the tracking, form the big combination of striding screen and write display system.
In addition, the photoelectronic imaging device can be arranged on the place ahead of clipboard, this moment, clipboard just can be any flat board, and need not through imaging light wave (as shown in Figure 3), the lettering pen of this moment also can be the form of a stroke or a combination of strokes thing that has the specific identification sign, for example be the spillikin that has certain special color, or the rear end have (as pentagram) lip pencil thing of certain special geometric configuration, differentiation identification when making things convenient for electronic processing unit to handle.
As shown in Figure 8, on projection screen 101, demonstrate the calibration pattern 108 that distributes according to certain rules with projecting optical engine 105, after photoelectronic imaging device 103 captures these calibration patterns, by the positional information of electronic processing unit 104 definite these calibration patterns, positional informations of these calibration patterns are become the correction data of lettering pen location with the formal transformation of form.
Seizure to the calibration pattern can be adopted the point by point scanning mode, and projection arrangement will be calibrated pattern and also promptly cast out on clipboard 101 at screen one by one, and the photoelectronic imaging device is followed the tracks of one by one and surveyed the location, realizes full frame calibration.
Seizure to the calibration pattern also can be adopted full frame parallel mode, and it also is to show on the clipboard 101 at projection screen all that projection arrangement will be calibrated pattern, and full frame calibration is finished in the disposable detection of photoelectronic imaging device location.
Claims (12)
1, a kind of photoelectric positioning apparatus that is used for interactive electronic writing display system, it is characterized in that: comprise clipboard, lettering pen and be used to catch the photoelectric detector of lettering pen position, described photoelectric detector is arranged at the rear or the place ahead on clipboard plane, directly to the clipboard imaging, write down the position of lettering pen on clipboard through the imaging light wave.
2, the photoelectric positioning apparatus that is used for interactive electronic writing display system according to claim 1, it is characterized in that: described photoelectric detector is arranged on the rear of clipboard, and clipboard can see through the imaging light wave.
3, the photoelectric positioning apparatus that is used for interactive electronic writing display system according to claim 1 is characterized in that: be provided with the optical device that is used to form required light path between described clipboard and the photoelectric detector.
4, the photoelectric positioning apparatus that is used for interactive electronic writing display system according to claim 1 is characterized in that: be provided with the filtering device that is used to filter the interference light wave in the imaging optical path between described clipboard and the photoelectric detector.
5, according to claim 1,2, the 3 or 4 described photoelectric positioning apparatus that are used for interactive electronic writing display system, it is characterized in that: described clipboard is for can display image and the display board of information or display screen, common blank or blackboard.
6, the photoelectric positioning apparatus that is used for interactive electronic writing display system according to claim 1 is characterized in that: described lettering pen is the photoelectric pen that has the light wave transmitter.
7, the photoelectric positioning apparatus that is used for interactive electronic writing display system according to claim 1 is characterized in that: described lettering pen is the sign pen that has the specific identification sign.
8, according to claim 1, the 6 or 7 described photoelectric positioning apparatus that are used for interactive electronic writing display system, it is characterized in that: described lettering pen is provided with pressure transducer and carries out the button of mouse function.
9, the photoelectric positioning apparatus that is used for interactive electronic writing display system according to claim 1 is characterized in that: comprise two or more and their imaging region is overlapped or the photoelectric detector that separates.
10, the calibration steps of the described photoelectric positioning apparatus of claim 1, it is characterized in that: on described clipboard, demonstrate the calibration pattern by employed display device, after photoelectric detector captures these calibration patterns, by calculating the location parameter of determining these calibration patterns, and form the correction data of lettering pen, make write with show consistent.
11, calibration steps according to claim 10 is characterized in that: adopt the point by point scanning mode, display device will be calibrated pattern and will be shown to one by one on the clipboard, and photoelectric detector is followed the tracks of one by one and surveyed the location, finishes full frame calibration.
12, calibration steps according to claim 10 is characterized in that: adopt full frame parallel mode, display device will be calibrated pattern and all will be shown on the clipboard, and full frame calibration is finished in the disposable detection of photoelectric detector location.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100773896A CN1285999C (en) | 2004-12-17 | 2004-12-17 | Photoelectric positioning device for interactive electronic writing display system and calibration method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100773896A CN1285999C (en) | 2004-12-17 | 2004-12-17 | Photoelectric positioning device for interactive electronic writing display system and calibration method thereof |
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| Publication Number | Publication Date |
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| CN1632736A true CN1632736A (en) | 2005-06-29 |
| CN1285999C CN1285999C (en) | 2006-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100773896A Expired - Fee Related CN1285999C (en) | 2004-12-17 | 2004-12-17 | Photoelectric positioning device for interactive electronic writing display system and calibration method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100401112C (en) * | 2006-04-30 | 2008-07-09 | 华南理工大学 | Hemispherical optical lens for plane positioning and plane positioning method thereof |
| CN100462937C (en) * | 2005-10-09 | 2009-02-18 | 深圳市巨龙科教高技术股份有限公司 | Computer projection auxiliary positioning method and interactive demonstration system using said method |
| CN102193661A (en) * | 2010-03-01 | 2011-09-21 | 北京魔力科技有限公司 | Intelligent positioning and calibration method |
| CN104866137A (en) * | 2015-05-12 | 2015-08-26 | 深圳创维－Rgb电子有限公司 | Writing and drawing color adjustable writing device and writing color adjusting method therefor |
| CN111337188A (en) * | 2020-05-18 | 2020-06-26 | 深圳市千分一智能技术有限公司 | Electronic pen calibration method, device, equipment and readable storage medium |
-
2004
- 2004-12-17 CN CNB2004100773896A patent/CN1285999C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100462937C (en) * | 2005-10-09 | 2009-02-18 | 深圳市巨龙科教高技术股份有限公司 | Computer projection auxiliary positioning method and interactive demonstration system using said method |
| CN100401112C (en) * | 2006-04-30 | 2008-07-09 | 华南理工大学 | Hemispherical optical lens for plane positioning and plane positioning method thereof |
| CN102193661A (en) * | 2010-03-01 | 2011-09-21 | 北京魔力科技有限公司 | Intelligent positioning and calibration method |
| CN102193661B (en) * | 2010-03-01 | 2014-05-28 | 北京魔力科技有限公司 | Intelligent positioning and calibration method |
| CN104866137A (en) * | 2015-05-12 | 2015-08-26 | 深圳创维－Rgb电子有限公司 | Writing and drawing color adjustable writing device and writing color adjusting method therefor |
| CN104866137B (en) * | 2015-05-12 | 2018-04-17 | 深圳创维－Rgb电子有限公司 | Write adjustable equipment and its shading process that writes of writing of draw color |
| CN111337188A (en) * | 2020-05-18 | 2020-06-26 | 深圳市千分一智能技术有限公司 | Electronic pen calibration method, device, equipment and readable storage medium |
| CN111337188B (en) * | 2020-05-18 | 2020-09-01 | 深圳市千分一智能技术有限公司 | Electronic pen calibration method, device, equipment and readable storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1285999C (en) | 2006-11-22 |
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Owner name: GUANGDONG VTRON VIDEO TECHNOLOGY CO., LTD. Free format text: FORMER NAME OR ADDRESS: WEICHUANG RIXIN ELECTRONIC CO., LTD., GUANGDONG |
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Address after: No. 6, color road, hi tech Industrial Development Zone, Guangdong, Guangzhou Patentee after: Guangdong Weichuangshixun Science and Technology Co., Ltd. Address before: No. 6, color road, Guangzhou Science City, Guangdong, Guangzhou Patentee before: Weichuangrixin Electronic Co., Ltd., Guangdong |
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