CN1746837A - Electronic display system positioning method and positioner thereof - Google Patents
Electronic display system positioning method and positioner thereof Download PDFInfo
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- CN1746837A CN1746837A CN 200510100255 CN200510100255A CN1746837A CN 1746837 A CN1746837 A CN 1746837A CN 200510100255 CN200510100255 CN 200510100255 CN 200510100255 A CN200510100255 A CN 200510100255A CN 1746837 A CN1746837 A CN 1746837A
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- display screen
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Abstract
A positioning method of electronic display system includes selecting preliminary positioning video camera lens, dividing screen to be regions and setting coordinate, confirming approximate central coordinate position by image signal processor according to image information provided by preliminary positioning video camera lens, selecting accurate positioning video camera lens according to preliminary positioning information provided by preliminary video camera lens, obtaining position data information of blocking matter and confirming accurate central coordinate position of blocking matter by image signal processor through accurate positioning video camera lens. The system for realizing the method is also disclosed.
Description
[technical field]
The invention relates to a kind of localization method and device thereof of electronic display system, refer to especially a kind of simple in structure, accurate positioning, reliable and stable, the localization method of interactive electronic display system and device thereof rapidly.
[background technology]
The locating device of existing interactive electronic display system has various ways, and exists not enough separately.Such as international publication number is that the patented claim of WO03/081911 discloses a kind of photo-electric locating device, it is that the infrared ray that utilizes the infra-red detection device be positioned at behind the printing opacity screen to catch the emission of infraluminescence pen positions, its structure relative complex needs to use special-purpose pen.The patent No. is that 02149761.3 Chinese patent discloses the infrared of a kind of utilization around the electronic whiteboard, receiving array is discerned by the shelter that moves in array and catch the position, its structure is also very complicated, and uses and to be subjected to the influence in serviceable life of infrared transmitting tube in infrared, the receiving array, receiving tube.U.S. Patent application US2004/0108996 discloses and a kind ofly four jiaos the structure that camera positions has been set at touch-screen, but because camera does not have object of reference, its location is not accurate enough.Also have in addition such as technology such as resistance-type location, condenser type location, electromagnetic type location, ultrasonic locating, still the also problem of ubiquity system complex, cost height, poor reliability.
Therefore, prior art is improved, provide a kind of simple in structure, accurate positioning, reliable and stable, cost is low, the localization method of willing interactive electronic display system and device thereof are real in necessary.
[summary of the invention]
The object of the present invention is to provide a kind of simple in structure, accurate positioning, reliable and stable, cost is low, the locating device of willing interactive electronic display system and the localization method that adopts the electronic display system of this device.
To achieve these goals, the present invention adopts following technical scheme:
A kind of electronic display system locating device is provided, the display screen edge of this electronic display system is provided with the color line, this electronic display system also comprises image-signal processor, and is connected with image-signal processor and image pickup scope covers three positioning shooting heads of whole display screens.
This camera is arranged at the diagonal position of display screen.But this color line be arranged on the display screen edge two or more have the difference recognition feature, the color line different with the distance of display screen.This two or more color line is parallel to each other, and the color line far away than the distance display screen near the color line of display screen is thin.
System can set wherein, and two positioning shooting heads come shelter is carried out location just, and with display screen subsection, set coordinate, further select accurately to locate the positioning shooting head that is adopted according to region, the shelter of first location general centre coordinate position, come shelter is accurately located determining its accurate coordinates position on display screen with accurate positioning shooting head then, this accurate location can obtain shelter the particular location of display screen and with the distance of display screen.This electronic display system localization method is as described below:
A kind of electronic display system localization method that uses described electronic display system locating device is provided, and it may further comprise the steps:
(1) the selected positioning shooting head just of system;
(2) system is with display screen subsection and set coordinate;
(3) image-signal processor determines that according to the image information that first positioning shooting head provides shelter is big
General centre coordinate position;
(4) according to the selected accurate positioning shooting head of the first locating information of first positioning shooting head;
(5) image-signal processor obtains shelter face on display screen the time by accurate positioning shooting head
The image of colo(u)r streak, and the original image of color line is analyzed during with have no occluder,
Extract the position digital information of shelter, determine the accurate centre coordinate of shelter position and knowledge
Other operational order.
System can also can come subregion based on the non-sensitive shooting angle of camera to display screen, according to different partition methods and the different method for calculating and locating of the corresponding employing of method for setting coordinate to display screen based on the rectangular coordinate subregion.
The positioning shooting head photograph shelter before display screen to the blocking of color line, can determine the position of shelter, and according to shelter to the blocking of different colours line, judge the distance of shelter and display screen; The image of the shelter that the positioning shooting head is collected color line on display screen the time, send in the image-signal processor, utilize image processing method, the original image of color line is analyzed during with have no occluder, extract the position digital information of shelter, thereby can determine the accurate position of shelter; Follow the tracks of the motion track of shelter, and convert corresponding graph text information to, resulting graph text information is superimposed upon by image processing equipment in the data of display system and by display device and shows in real time, or send as click, write, interactive operation such as wiping board.
Operation for coupled computer or other equipment, move as cursor, click, image processing circuit is the click that identifies, actions such as cursor moves send to operation system of computer by interface, thereby finish the realization of this action and the demonstration on display screen.When shelter blocked the color line that does not block close display screen away from the color line of display screen, computing machine was judged as cursor and follows, and sends the instruction that cursor is followed shelter.
For avoiding the blind area, realize the accurate location on the full screen, this electronic display system can further be provided with the 4th positioning shooting head, or this electronic display system also can be provided with the camera more than four.
Compared with prior art, electronic display system localization method of the present invention and device thereof have following beneficial effect: come shelter is accurately located by three positioning shooting heads are set at the display screen edge, this apparatus structure is simple, cost is low, this localization method accurate positioning, and reliable and stable being swift in response.
[description of drawings]
Fig. 1 is the synoptic diagram of color line of the present invention;
Fig. 2 is that shelter of the present invention blocks the synoptic diagram away from the color line of display screen;
Fig. 3 is that shelter of the present invention blocks the synoptic diagram near the color line of display screen;
Fig. 4 is a positioning shooting head shooting synoptic diagram of the present invention;
Fig. 5 is the synoptic diagram of display screen of the present invention based on the rectangular coordinate subregion;
Fig. 6 is the synoptic diagram of display screen of the present invention based on the angle subregion.
[embodiment]
As Fig. 1 and shown in Figure 4, a kind of electronic display system locating device, this electronic display system comprises image-signal processor (figure does not show), and be connected with image-signal processor and image pickup scope covers three positioning shooting heads (1,2,3) of whole display screens, this camera (1,2,3) is arranged at the edge diagonal position of display screen.Be installed in two angles of lower limb and the upper right corner of display screen among this embodiment respectively, in order to improve bearing accuracy, can consider in the place ahead of display screen the 4th camera (figure does not show) to be installed again, the image pickup scope of all cameras all covers display screen.
In order to cooperate the positioning action of camera, on four edges of display screen, also the color line need be installed, for the convenience of locating and accurately, better distinguish exercises, as write, click, cursor drag, screen is wiped etc., but this color line be arranged on the display screen edge two or more have the difference recognition feature, the color line (4,5) different with the distance of display screen.Specifically, this two or more color line (4,5) color requires different, is parallel to each other, and the color line (4) far away than the distance display screen near the color line (5) of display screen is thin, as shown in fig. 1.
In the lump referring to figs. 2 and 3, camera 1, camera 2, camera 3 photograph shelter before display screen when mobile behind the image of color line (4,5), output to the image-signal processor that main process chip such as DSP/CPLD/FPGA constitutes, image-signal processor is accurately located camera 1, camera 2, the image and the image comparison process that does not have shelter color line of color line when camera 3 photographs shelter to the position of shelter.Follow the tracks of the motion track of shelter, and be converted to corresponding graph text information, the graph text information of gained can be added in the data of display system and by display device by signal handling equipment and show, or sends other interactive instructions.
Operation for coupled computer or other equipment, move as cursor, click, image processing circuit is the click that identifies, actions such as cursor moves send to operation system of computer by interface, thereby finish the realization of this action and the demonstration on display screen.
This uses the electronic display system localization method of described electronic display system locating device, and it may further comprise the steps:
(1) the selected positioning shooting head just of system;
(2) system is with display screen subsection and set coordinate;
(3) image-signal processor determines that according to the image information that first positioning shooting head provides shelter is big
General centre coordinate position;
(4) according to the selected accurate positioning shooting head of the first locating information of first positioning shooting head;
(5) image-signal processor obtains shelter face on display screen the time by accurate positioning shooting head
The image of colo(u)r streak, and the original image of color line is analyzed during with have no occluder,
Extract the position digital information of shelter, determine the accurate centre coordinate of shelter position and knowledge
Other operational order.
System can also can come subregion based on the non-sensitive shooting angle of camera to display screen, according to different partition methods and the different method for calculating and locating of the corresponding employing of method for setting coordinate to display screen based on the rectangular coordinate subregion.
Various interactive actions, as write, mouse drag, blackboard erasers etc. can be according to the differentiation of getting off, when diagram 2 is a interactive action away from display screen, certain camera photographs the synoptic diagram of image, during this action, shelter 6 is away from display screen, the image appearance that this moment, camera was taken is that 6 pairs of color lines 4 away from display screen of shelter block, and the color line 5 near display screen is not blocked, be action so can judge the form of this interactive action away from display screen, the scope of interactive action can be calculated according to the general center of shelter; When diagram 3 is the interactive action of close display screen, certain camera photographs the synoptic diagram of image, during this action, shelter 6 is near display screen, the image appearance that this moment, camera was taken is that 6 pairs of color lines 4 of shelter, color line 5 all block, so can judge the form of this interactive action is the action near display screen, the scope of interactive action can be calculated according to the general center of shelter.
Please in conjunction with reference to figure 5, system can set wherein two positioning shooting heads (1,2) come shelter is carried out location just, and with display screen subsection, set coordinate, further select accurately to locate the positioning shooting head (camera 2 and 3 that is adopted according to the region, shelter 6 general centre coordinate position of first location, or camera 1 and 3, or camera 1 and 2), come shelter is accurately located determining its accurate coordinates position on display screen with accurate positioning shooting head then, this accurate location can obtain shelter 6 the particular location of display screen and with the distance of display screen.
Fig. 4 be shelter on display screen during certain position, camera 1, camera 2, the geometric representation of camera 3 photographic images, the position of coordinate O that can be obtained the general central point of shelter by cartesian geometry is:
During by camera 1 and camera 2 location:
X＝W*tgΦ/(tgβ+tgΦ)；
Y＝W*tgβ*tgΦ/(tgβ+tgΦ)；
During by camera 2 and camera 3 location:
X＝W-H*tgα*ctgΦ/(tgα+ctgΦ)；
Y＝H*tgα/(tgα+ctgΦ)；
During by camera 1 and camera 3 location:
X＝W-(H-W*tgβ)/(ctgα-tgβ)；
Y＝(W-(H-W*tgβ)/(ctgα-tgβ))*tgβ；
Camera photograph shelter is arranged the time image with do not have the image comparison of shelter to obtain:
α＝(α1+α2)/2；
β＝(β1+β2)/2；
Φ＝(Φ1+Φ2)/2；
W, H can actually survey the width of display screen and highly obtain;
Three kinds of localization methods are arranged as known from the above, can select following positioning principle for use:
Consider based on the operand of camera 1 and camera 2 location compare other two kinds less, can just locate general centre coordinate (X, the Y of shelter earlier by this locator meams
1), then with the display screen center point coordinate (W/2, H/2) and D, E, F subregion point coordinate (P, Q) relatively (the coordinate P of F subregion point, Q can obtain optimum by test according to concrete screen for D, E):
When X≤W/2, Y≤H/2, shelter drops on the A district: adopt camera 2 and camera 3 accurate location again;
When X＞W/2, Y≤H/2, when shelter drops on the B district: adopt camera 1 and camera 3 accurate location again;
When X 〉=W/2, Y＞H/2, when shelter drops on the C district: the locator value that directly adopts camera 1 and camera 2;
When X≤W/2, H/2＜Y≤Q, when shelter drops on the D district: adopt camera 2 and camera 3 accurate location again;
When W/2＞X＞P, Y＞Q, when shelter drops on the E district: the locator value that directly adopts camera 1 and camera 2;
When X≤P, Y＞Q, when shelter drops on the F district: can consider to select by concrete display screen with camera 1 and camera 2 or camera 2 and camera 3 location;
After accurately having located the centre coordinate of shelter, the size that can obtain shelter is:
2*SIN ((β-β 1)/2) * (X
2+ Y
2) (considering that shelter is circular)
The shelter position also can be based on camera 1 in this locating device, camera 2, and the non-sensitive shooting angle district of camera 3 comes subregion, shows as Fig. 6.
β min among Fig. 6, β max, Φ min, Φ max, α min, α max can draw an optimum value by test according to the concrete screen size and the image pickup scope of camera.β＜β min or β＞β max is the shooting inert zone of camera 1, and Φ＜Φ min or Φ＞Φ max is the shooting inert zone of camera 2, and α＜α min or α＞α max is the shooting inert zone of camera 3.
Select earlier camera 1, camera 2 calculate shelter centre coordinate (X, Y), then according to this coordinate Calculation:
β＝arctgY/X；
Φ＝arctgY/(W-X)；
α＝arctg(W-X)/(H-Y)；
When (X, Y) { β＜β min ∩ Φ＜Φ min}, shelter can select for use camera 1 and camera 3 or camera 2 and camera 3 to reorientate at the shooting inert zone of camera 1 and camera 2 to ∈ again;
When (X, Y) ∈ β＜β min ∩ α＜α min}, (X, Y) { β＞β max ∩ α＞α max}, shelter can select for use camera 2 and camera 1 or camera 2 and camera 3 to reorientate at the shooting inert zone of camera 1 and camera 3 to ∈ again;
When (X, Y) { Φ＞Φ max ∩ α＜α min}, shelter can select for use camera 2 and camera 1 or camera 2 and camera 3 to reorientate at the shooting inert zone of camera 1 and camera 3 to ∈ again;
Because the image pickup scope of camera is an entire display screen, so { β＞β max ∩ Φ＜Φ min}, { Φ＞Φ max ∩ α＞α max}, { Φ＜Φ min ∩ area that α＜α min} is formed is very little, can think that three cameras can sensitivity photograph.
Claims (9)
1, a kind of electronic display system locating device, it is characterized in that, the display screen edge of this electronic display system is provided with the color line, this electronic display system also comprises image-signal processor, and is connected with image-signal processor and image pickup scope covers three positioning shooting heads (1,2,3) of whole display screens.
2, electronic display system locating device as claimed in claim 1 is characterized in that, but this color line be arranged on the display screen edge two or more have the difference recognition feature, the color line (4,5) different with the distance of display screen.
3, electronic display system locating device according to claim 2, it is characterized in that: when shelter (6) blocks the color line (5) that does not block close display screen away from the color line (4) of display screen, system processor is judged as cursor and follows, and sends the instruction that cursor is followed shelter.
4, electronic display system locating device as claimed in claim 2 is characterized in that, this two or more color line (4,5) is parallel to each other, and thin near the color line (5) of the display screen color line (4) far away than the distance display screen.
5, electronic display system locating device as claimed in claim 1 is characterized in that, this camera (1,2,3) is arranged at the diagonal position of display screen.
6, electronic display system locating device as claimed in claim 1 is characterized in that, this electronic display system further is provided with the 4th positioning shooting head.
7, a kind of use electronic display system localization method of electronic display system locating device according to claim 1 is characterized in that it may further comprise the steps:
(1) the selected positioning shooting head just of system;
(2) system is with display screen subsection and set coordinate;
(3) image-signal processor is determined the general centre coordinate of shelter position according to the image information that first positioning shooting head provides;
(4) according to the selected accurate positioning shooting head of the first locating information of first positioning shooting head;
(5) image-signal processor obtains the image of shelter color line on display screen the time by accurate positioning shooting head, and the original image of color line is analyzed during with have no occluder, extract the position digital information of shelter, determine the instruction of shelter accurate centre coordinate position and identifying operation.
8, electronic display system localization method as claimed in claim 7 is characterized in that, system can be to display screen based on the rectangular coordinate subregion.
9, electronic display system localization method as claimed in claim 7 is characterized in that, system can come subregion based on the non-sensitive shooting angle of camera to display screen.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005101002556A CN1326023C (en) | 2005-10-12 | 2005-10-12 | Electronic display system positioning method and positioner thereof |
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| CNB2005101002556A CN1326023C (en) | 2005-10-12 | 2005-10-12 | Electronic display system positioning method and positioner thereof |
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| CN1746837A true CN1746837A (en) | 2006-03-15 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101778219B (en) * | 2010-01-27 | 2012-05-09 | 广东威创视讯科技股份有限公司 | Device and method for synchronous working of plurality of camera heads |
| CN101398728B (en) * | 2008-07-21 | 2013-01-09 | 常州迪锐特电子科技有限公司 | Electronic white board system and method based on host process |
| CN108414195A (en) * | 2018-01-17 | 2018-08-17 | 深圳市绚视科技有限公司 | Detection method, device, system and the storage device of light source emitter to be measured |
| CN110147182A (en) * | 2018-06-26 | 2019-08-20 | 山东蓝贝思特教装集团股份有限公司 | A kind of liquid crystal writing film selective erase Image Location System |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040001144A1 (en) * | 2002-06-27 | 2004-01-01 | Mccharles Randy | Synchronization of camera images in camera-based touch system to enhance position determination of fast moving objects |
| CN1602792A (en) * | 2004-10-29 | 2005-04-06 | 华南理工大学 | Internal channel positioning , online observation, image gathering device of mini wireless magnetic control |
-
2005
- 2005-10-12 CN CNB2005101002556A patent/CN1326023C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101398728B (en) * | 2008-07-21 | 2013-01-09 | 常州迪锐特电子科技有限公司 | Electronic white board system and method based on host process |
| CN101778219B (en) * | 2010-01-27 | 2012-05-09 | 广东威创视讯科技股份有限公司 | Device and method for synchronous working of plurality of camera heads |
| CN108414195A (en) * | 2018-01-17 | 2018-08-17 | 深圳市绚视科技有限公司 | Detection method, device, system and the storage device of light source emitter to be measured |
| CN110147182A (en) * | 2018-06-26 | 2019-08-20 | 山东蓝贝思特教装集团股份有限公司 | A kind of liquid crystal writing film selective erase Image Location System |
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|---|---|
| CN1326023C (en) | 2007-07-11 |
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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, hi tech Industrial Development Zone, Guangdong, Guangzhou Patentee before: Weichuangrixin Electronic Co., Ltd., Guangdong |
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