CN102880361B - The location calibration steps of electronic white board equipment - Google Patents
The location calibration steps of electronic white board equipment Download PDFInfo
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- CN102880361B CN102880361B CN201210385430.0A CN201210385430A CN102880361B CN 102880361 B CN102880361 B CN 102880361B CN 201210385430 A CN201210385430 A CN 201210385430A CN 102880361 B CN102880361 B CN 102880361B
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- anchor point
- frame image
- calibration
- white board
- board equipment
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention discloses a kind of location calibration steps of electronic white board equipment, the method comprises the steps:, and (1) carries out sequential frame image collection to screen; (2) judge whether sequential frame image exists light signal; (3) if the judged result of step (2) is yes, then in this sequential frame image, access time is spaced apart two two field pictures of t, the coordinate of recording light signal respectively on this two two field picture, and calculates the deviate of two coordinates; (4) by comparing the deviate of two coordinates, judge that whether this anchor point collection is successful.Method provided by the invention, can Obtaining Accurate anchor point information, prevents because light signal is unstable, the deviations caused; Meanwhile, adopt hand-held sender unit to make back the work that slides, just can control to get back to a locating point position, carry out Resurvey, need accent to start to locate the trouble of calibration after avoiding producing invalid clicks, reduce the duration and difficulty of locating calibration.
Description
Technical field
The present invention relates to the location collimation technique of electronic white board equipment, particularly relate to and a kind ofly can operate to location of mistake the location calibration steps return.
Background technology
Electronic white board equipment needs to position calibration when using initial, positioning school is punctual, first upper computer software generates location calibration picture on screen, several ad-hoc locations on location calibration picture are respectively provided with an anchor point, hand-held sender unit clicks current anchor point center, and slave computer gathers the coordinate of this click and moves to next anchor point for once effectively to click.
For example, first upper computer software produces location calibration picture on screen, and calibration picture in location is distributed with some anchor points independent of each other; Slave computer first by first anchor point in selective top-down as current anchor point, then use hand-held sender unit to click current anchor point center and produce calibration hot spot, after slave computer collects the positional information of this calibration hot spot, choose next anchor point as current anchor point; When all anchor points are all clicked arrive after, system obtains location calibration result according to the positional information of all calibration hot spots.In said process, note slave computer collect calibration hot spot positional information after and choose next anchor point as current anchor point for once effectively to click; Identify current anchor point for the ease of operator, general design is, calibration picture in location only demonstrates current anchor point, and after therefore effectively having clicked, location calibration picture is all different at every turn.
Punctual at positioning school, the hot spot that non-hand-held sender unit produces or the hot spot that hand-held telltale produces because of maloperation likely can be there is on screen, we claim this kind of hot spot for interference hot spot, because slave computer cannot distinguish interference hot spot, can interference hot spot be carried out gathering as calibration hot spot and move to next anchor point by mistake; Because the position deviation of interference hot spot and calibration hot spot is larger, can have an impact to last location calibration result precision, and there is not the selection of stepping back and again clicking in prior art yet, therefore can only people be the location calibration abandoning this, again get back to original state and re-start location calibration, increase time and the difficulty of location calibration.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, the invention provides a kind of location calibration steps can stepping back the electronic white board equipment again clicked, and avoids cause reorientate calibration because of interference hot spot.
Technical scheme: for achieving the above object, the technical solution used in the present invention is:
The location calibration steps of electronic white board equipment, the method comprises the steps:
(1) with certain frequency, sequential frame image collection is carried out to screen;
(2) judge whether sequential frame image all exists light signal;
(3) if the judged result of step (2) is yes, then in this all sequential frame image, access time is spaced apart two two field pictures of t, the coordinate of recording light signal respectively on this two two field picture, and calculates the deviate of two coordinates;
(4) judge whether the deviate of two coordinates is greater than predetermined distance L, if the determination result is YES, then this anchor point collection failure, gets back to last locating point position, Resurvey locating point data;
(5) if the judged result of step (4) is no, then this anchor point collection success, continues to gather next anchor point.
Due in the calibration process of existing location, according to location calibration picture, operating personnel just can know whether click is that interference hot spot causes, therefore said method is utilized, when learning that click causes for interference hot spot, continuous print paddling is carried out at screen by hand-held sender unit, system just can be allowed to know this anchor point collection failure, and system just can make relevant treatment.
The method can also be used for detecting hand-held sender unit and whether other relevant devices exist fault.
Preferably, if this anchor point collection failure, then system abandons the data acquisition results of click last time, and gets back to a locating point position; If this anchor point collection success, then store the data acquisition results that this is clicked, and move on to next anchor point.By this design, can avoid, after learning that click is caused by interference hot spot, needing accent to start to locate the trouble of calibration, reducing the duration and difficulty of locating calibration.
Preferably, in described step (3), the two two field picture images being spaced apart t access time are two two field pictures of midfeather two frame.
Beneficial effect: the location calibration steps of electronic white board equipment provided by the invention, can Obtaining Accurate anchor point information, prevents because light signal is unstable, the deviations caused; Meanwhile, adopt hand-held sender unit to make back the work that slides, just can control to get back to a locating point position, carry out Resurvey, need accent to start to locate the trouble of calibration after avoiding producing invalid clicks, reduce the duration and difficulty of locating calibration.
Accompanying drawing explanation
Fig. 1 is the application example process flow diagram of the inventive method.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
Be illustrated in figure 1 a kind of location calibration steps of electronic white board equipment, calibration picture in location exists N number of anchor point, and all carried out once judging to the light signal that each hand-held sender unit produces in this case, detailed process is as follows:
(1) display location picture, setting period n=0;
(2) use projection spirit to carry out sequential frame image collection to its viewfinder range (screen), general data frequency acquisition is 60/80 frame;
(3) adopt hand-held sender unit to click screen inner position point icon center, one click can collect multiframe data;
(4) projection is smart is uploaded to host computer by the CMOS coordinate information collected, and host computer is every two frame recordings coordinate information, and the coordinate of double record is designated as (x respectively
1, y
1) and (x
2, y
2);
(5) (x is calculated
1, y
1) and (x
2, y
2) deviate (dx, dy), judge whether dx and dy is less than or equal to L simultaneously, if be judged as YES, then successfully obtain this anchor point coordinate (x
2, y
2), and carry out step (6), otherwise carry out step (7), can design L is 2CMOS pixel;
(6) data acquisition results that this is clicked is stored, n=n+1;
(7) get back to an anchor point, enter step (3);
(8) judge whether n=N sets up, if be judged as NO, then move on to next anchor point and enter step (3), otherwise terminate, N is anchor point sum.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (3)
1. the location calibration steps of electronic white board equipment, is characterized in that: the method comprises the steps:
(1) with certain frequency, sequential frame image collection is carried out to screen;
(2) judge whether sequential frame image all exists light signal;
(3) if the judged result of step (2) is yes, then in this all sequential frame image, access time is spaced apart two two field pictures of t, the coordinate of recording light signal respectively on this two two field picture, and calculates the deviate of two coordinates;
(4) judge whether the deviate of two coordinates is greater than predetermined distance L, if the determination result is YES, then this anchor point collection failure, gets back in step (1), Resurvey locating point data;
(5) if the judged result of step (4) is no, then this anchor point collection success, continues to gather next anchor point.
2. the location calibration steps of electronic white board equipment according to claim 1, is characterized in that: if this anchor point collection failure, then system abandons the data acquisition results of click last time, and gets back to a locating point position; If this anchor point collection success, then store the data acquisition results that this is clicked, and move on to next anchor point.
3. the location calibration steps of electronic white board equipment according to claim 1, is characterized in that: in described step (3), and the two two field picture images being spaced apart t access time are two two field pictures of midfeather two frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210385430.0A CN102880361B (en) | 2012-10-12 | 2012-10-12 | The location calibration steps of electronic white board equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210385430.0A CN102880361B (en) | 2012-10-12 | 2012-10-12 | The location calibration steps of electronic white board equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102880361A CN102880361A (en) | 2013-01-16 |
| CN102880361B true CN102880361B (en) | 2015-09-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210385430.0A Expired - Fee Related CN102880361B (en) | 2012-10-12 | 2012-10-12 | The location calibration steps of electronic white board equipment |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104133598B (en) * | 2013-05-03 | 2017-09-22 | 杨新龙 | A kind of dynamic positioning calibration bootstrap technique of free drive of electric whiteboard system and its device |
| CN111243553B (en) * | 2018-11-29 | 2021-06-08 | 北京小米移动软件有限公司 | Control method and device of terminal screen and storage medium |
| CN112615615B (en) * | 2020-12-08 | 2023-12-26 | 安徽鸿程光电有限公司 | Touch positioning method, device, equipment and medium |
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| CA2386094A1 (en) * | 2001-06-01 | 2002-12-01 | Smart Technologies Inc. | Calculating camera offsets to facilitate object position determination using triangulation |
| JP2003323604A (en) * | 2002-04-26 | 2003-11-14 | Nippon Hoso Kyokai <Nhk> | Movement judging method and device, and movement judging program |
| CN101042620A (en) * | 2006-03-20 | 2007-09-26 | 三星电子株式会社 | Pointing input device, method, and system using image pattern |
| CN101571776A (en) * | 2008-04-21 | 2009-11-04 | 株式会社理光 | Electronics device having projector module |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7084386B2 (en) * | 2003-05-02 | 2006-08-01 | International Business Machines Corporation | System and method for light source calibration |
| US7420540B2 (en) * | 2003-12-01 | 2008-09-02 | Olbrich Craig A | Determining positioning and/or relative movement of graphical-user interface element based on display images |
| WO2005119356A2 (en) * | 2004-05-28 | 2005-12-15 | Erik Jan Banning | Interactive direct-pointing system and calibration method |
| US20060022942A1 (en) * | 2004-07-30 | 2006-02-02 | Po-Chi Lin | Control method for operating a computer cursor instinctively and the apparatus thereof |
-
2012
- 2012-10-12 CN CN201210385430.0A patent/CN102880361B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2386094A1 (en) * | 2001-06-01 | 2002-12-01 | Smart Technologies Inc. | Calculating camera offsets to facilitate object position determination using triangulation |
| JP2003323604A (en) * | 2002-04-26 | 2003-11-14 | Nippon Hoso Kyokai <Nhk> | Movement judging method and device, and movement judging program |
| CN101042620A (en) * | 2006-03-20 | 2007-09-26 | 三星电子株式会社 | Pointing input device, method, and system using image pattern |
| CN101571776A (en) * | 2008-04-21 | 2009-11-04 | 株式会社理光 | Electronics device having projector module |
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| CN102880361A (en) | 2013-01-16 |
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| CB02 | Change of applicant information |
Address after: 210006, Nanjing, Jiangsu province Qinhuai district should be No. 388 street, 1865 Industrial Park, E13 building, two floor West Applicant after: Nanjing Magon Opto-Electrical Science and Technology Co., Ltd. Address before: 210006, Nanjing, Jiangsu province Qinhuai district should be No. 388 street, 1865 Industrial Park, E13 building, two floor West Applicant before: Nanjing Magon Opto-Electrical Science and Technology Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: NANJING MAGON OPTO-ELECTRICAL SCIENCE AND TECHNOLOGY CO., LTD. TO: NANJING MAGON CO., LTD. |
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