CN102880361A - Positioning calibration method for electronic whiteboard equipment - Google Patents
Positioning calibration method for electronic whiteboard equipment Download PDFInfo
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- CN102880361A CN102880361A CN2012103854300A CN201210385430A CN102880361A CN 102880361 A CN102880361 A CN 102880361A CN 2012103854300 A CN2012103854300 A CN 2012103854300A CN 201210385430 A CN201210385430 A CN 201210385430A CN 102880361 A CN102880361 A CN 102880361A
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- anchor point
- positioning
- light signal
- frame image
- coordinates
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Abstract
The invention discloses a positioning calibration method for electronic whiteboard equipment. The method comprises the following steps of: (1) acquiring a continuous frame image from a screen; (2) judging whether the continuous frame image comprises a light signal or not; (3) if a judgment result obtained by the step (2) indicates that the continuous frame image comprises the light signal, selecting two frame images at a time interval t from the continuous frame image, recording the coordinates of the light signal on the frame images respectively, and calculating an offset value of the coordinates; and (4) comparing the offset value of the coordinates to judge whether the positioning acquisition succeeds or not. According to the method, positioning point information can be accurately acquired, and positioning offset caused by the instability of the light signal can be prevented; and in addition, a handheld signal transmission device back slips to return to the previous positioning point for reacquisition, so that the trouble that the positioning calibration is required to be started over again after an ineffective click is avoided, positioning calibration time is shortened, and positioning calibration difficulty is lowered.
Description
Technical field
The present invention relates to the location collimation technique of electronic white board equipment, relate in particular to a kind of location calibration steps that can return location of mistake operation.
Background technology
Electronic white board equipment need to position calibration when use is initial, positioning school is punctual, upper computer software at first generates location calibration picture at screen, on the several ad-hoc locations on the location calibration picture, respectively be provided with an anchor point, hand-held sender unit is clicked current anchor point center, and slave computer gathers the coordinate of this time click and moves to next anchor point for once effectively clicking.
For instance, upper computer software is at first produced location calibration picture at screen, and the calibration picture is distributed with some anchor points independent of each other in the location; Slave computer at first by first anchor point in the selective top-down as current anchor point, then use hand-held sender unit to click current anchor point center and produce the calibration hot spot, slave computer collects after the positional information of this calibration hot spot and chooses next anchor point as current anchor point; When all anchor points all after clicked the arriving, system obtains the location calibration result according to positional informations of all calibration hot spots.In the said process, the note slave computer collects after the positional information of calibrating hot spot and chooses next anchor point is once effectively to click as current anchor point; Identify current anchor point for the ease of the operator, general design is, only demonstrates current anchor point on location calibration picture, therefore each effectively click finish after, calibration picture in location is all different.
Punctual at positioning school, might the hot spot of non-hand-held sender unit generation or the hot spot that hand-held telltale produces because of maloperation appear at screen, we claim this class hot spot for disturbing hot spot, because slave computer can't be distinguished the interference hot spot, can will disturb hot spot to gather and move to next anchor point as the calibration hot spot by mistake; Owing to disturbing the position deviation of hot spot and calibration hot spot larger, can exert an influence to last location calibration result precision, and prior art does not exist yet and steps back again the selection of clicking, therefore can only the people be the location calibration of abandoning this, again get back to original state and re-start the 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 that can step back again the electronic white board equipment of clicking, avoid because disturbing the calibration of reorientating that hot spot causes.
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 screen is carried out the sequential frame image collection;
(2) judge whether all there is light signal on the sequential frame image;
(3) if the judged result of step (2) is yes, then in these all sequential frame images, be spaced apart two two field pictures of t access time, the recording light signal is the coordinate on this two two field picture respectively, and calculates the deviate of two coordinates;
Whether the deviate of (4) judging two coordinates is greater than predetermined distance L, if judged result is yes, then this anchor point collection failure is got back to last locating point position, the Resurvey locating point data;
(5) if the determination result is NO for step (4), then this anchor point collection success continues to gather next anchor point.
Because in the calibration process of existing location, operating personnel just can know according to location calibration picture whether click is to disturb hot spot to cause, therefore utilize said method, learning that clicking is when disturbing hot spot to cause, carry out continuous paddling by hand-held sender unit at screen, just can allow system know this anchor point collection failure, system just can make relevant treatment.
Whether the method can also exist fault for detection of hand-held sender unit and other relevant devices.
Preferably, if this anchor point collection failure, then system abandons the data acquisition result of click last time, and gets back to an anchor point position; If this anchor point collection success is then stored the data acquisition result of this click, and is moved on to next anchor point.By this design, can avoid learning click by after disturbing hot spot to cause, the trouble that needs accent to begin to locate calibration reduces duration and the difficulty that calibrate the location.
Preferably, in the described step (3), the two two field picture images that are spaced apart t access time are two two field pictures of midfeather two frames.
Beneficial effect: the location calibration steps of electronic white board equipment provided by the invention, can Obtaining Accurate anchor point information, prevent because of light signal unstable, the deviations that causes; Simultaneously, adopt hand-held sender unit to do back to slide and do, just can control and get back to an anchor point position, carry out Resurvey, avoid producing the trouble that needs accent to begin to locate calibration behind the invalid clicks, reduce duration and the difficulty of location calibration.
Description of drawings
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 as a kind of location calibration steps of electronic white board equipment, there be N anchor point in the calibration picture in the location, in this case each light signal of handing the sender unit generation has all been carried out once judging, detailed process is as follows:
(1) shows the location picture, set period n=0;
(2) use the projection spirit that its viewfinder range (screen) is carried out the sequential frame image collection, the general data frequency acquisition is 60/80 frame;
(3) adopt hand-held sender unit to click anchor point icon center in the screen, one click can collect the multiframe data;
(4) projection spirit is uploaded to host computer with the COMS coordinate information that collects, and host computer is every coordinate information of two frame recordings, and the coordinate of double record is designated as respectively (x
1, y
1) and (x
2, y
2);
(5) calculate (x
1, y
1) and (x
2, y
2) deviate (dx, dy), judge that dx and dy whether simultaneously less than or equal to L, are then successfully to obtain this anchor point coordinate (x if be judged as
2, y
2), and carry out step (6), otherwise carry out step (7), can design L is 2CMOS pixel;
(6) store the data acquisition result of this click, n=n+1;
(7) get back to an anchor point, enter step (3);
(8) judge whether n=N sets up, if be judged as noly, then move on to next anchor point and enter step (3), otherwise finish, N is the anchor point sum.
The above only is preferred implementation of the present invention; be noted that for those skilled in the art; under the prerequisite that does not break away from the principle 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, it is characterized in that: the method comprises the steps:
(1) with certain frequency screen is carried out the sequential frame image collection;
(2) judge whether all there is light signal on the sequential frame image;
(3) if the judged result of step (2) is yes, then in these all sequential frame images, be spaced apart two two field pictures of t access time, the recording light signal is the coordinate on this two two field picture respectively, and calculates the deviate of two coordinates;
Whether the deviate of (4) judging two coordinates is greater than predetermined distance L, if judged result is yes, then this anchor point collection failure is got back to last locating point position, the Resurvey locating point data;
(5) if the determination result is NO for step (4), 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 result that clicked last time, and gets back to an anchor point position; If this anchor point collection success is then stored the data acquisition result of this click, and is moved on to next anchor point.
3. the location calibration steps of electronic white board equipment according to claim 1, it is characterized in that: in the described step (3), the two two field picture images that are spaced apart t access time are two two field pictures of midfeather two frames.
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 true CN102880361A (en) | 2013-01-16 |
| CN102880361B CN102880361B (en) | 2015-09-09 |
Family
ID=47481718
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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| Country | Link |
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| CN (1) | CN102880361B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104133598A (en) * | 2013-05-03 | 2014-11-05 | 周永清 | Driver-free positioning calibration guide method and driver-free positioning calibration guide device for electronic whiteboard system |
| CN111243553A (en) * | 2018-11-29 | 2020-06-05 | 北京小米移动软件有限公司 | Control method and device of terminal screen and storage medium |
| CN112615615A (en) * | 2020-12-08 | 2021-04-06 | 安徽鸿程光电有限公司 | Touch positioning method, device, equipment and medium |
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| US20060022942A1 (en) * | 2004-07-30 | 2006-02-02 | Po-Chi Lin | Control method for operating a computer cursor instinctively and the apparatus thereof |
| 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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Patent Citations (8)
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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 |
| US20040217260A1 (en) * | 2003-05-02 | 2004-11-04 | International Business Machines Corporation | System and method for light source calibration |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104133598A (en) * | 2013-05-03 | 2014-11-05 | 周永清 | Driver-free positioning calibration guide method and driver-free positioning calibration guide device for electronic whiteboard system |
| 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 |
| CN111243553A (en) * | 2018-11-29 | 2020-06-05 | 北京小米移动软件有限公司 | Control method and device of terminal screen and storage medium |
| 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 |
| CN112615615A (en) * | 2020-12-08 | 2021-04-06 | 安徽鸿程光电有限公司 | Touch positioning method, device, equipment and 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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| Publication number | Publication date |
|---|---|
| CN102880361B (en) | 2015-09-09 |
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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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