CN108874241A - Metope touch-control system based on preschool education - Google Patents
Metope touch-control system based on preschool education Download PDFInfo
- Publication number
- CN108874241A CN108874241A CN201810705449.6A CN201810705449A CN108874241A CN 108874241 A CN108874241 A CN 108874241A CN 201810705449 A CN201810705449 A CN 201810705449A CN 108874241 A CN108874241 A CN 108874241A
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- China
- Prior art keywords
- coordinate
- infrared
- touch
- display area
- bright spot
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
Abstract
The invention discloses a kind of metope touch-control system based on preschool education.In the edge of projected display region (3), at least one infrared transmitter (2) is set, infrared transmitter (2) is parallel to the infrared light of projected display region (3) transmitting planar, form an infrared optical plane, when finger touch to projected display region (3), it can stop infrared light, and form luminous point in finger areas；Camera (1) with infrared fileter captures bright spot, and calculates bright spot in the position of projected display region (3), determines the coordinate touched, realizes touch control operation.
Description
Technical field
The invention belongs to technical field of video processing, and in particular to a kind of metope touch-control system based on preschool education.
Background technique
It realizes arbitrary plane touch control operation at present, mainly uses infrared frame technology (shown in Fig. 1).
The principle of infrared frame is that a frame has been put on arbitrary plane, LED light of arranging on two of them side, their opposites
Two sides arrange photoreceptor.Material used by frame can filter out visible light, and the light that LED is projected will become after passing through
Infrared light, side constitutes infrared ray matrix on a display screen.Infrared light will be blocked when finger touches screen, controller is according to resistance
The coordinate of touch position is judged every situation.
The problem is that：It is at high cost when infrared frame realization large scale plane projection (to need up to a hundred pairs of infrared emissions easily
Device and receiver corporation).And frame must be placed above plane influences beauty.
Summary of the invention
The purpose of the present invention is to solve large area touch area plane touch device cost in the market is excessively high, it is necessary to band
The problem of frame.
A kind of metope touch-control system based on preschool education provided by the invention is arranged in the edge of projected display region
At least one infrared transmitter, infrared transmitter are parallel to the infrared light of projected display region transmitting planar, form one
Infrared optical plane can stop infrared light, and form luminous point in finger areas when finger touch is to projected display region；With red
The camera of outer optical filter captures bright spot, and calculates bright spot in the position of projected display region, determines the coordinate touched, realizes
Touch control operation.
Preferably, an infrared transmitter is respectively set at four angles of projected display region.
Preferably, the infrared light of the planar is sector.
Preferably, the projected display region if it is 150 cun or more, then 2 infrared transmitters and 1 are set with infrared
The camera of optical filter.
Preferably, calculating specific calculating process of the bright spot in the position of projected display region is：Definition：X1=bright spot is being schemed
X coordinate as in；The y-coordinate of y1=bright spot in the picture；The display area ax=upper left corner x coordinate；The display area ay=upper left
Angle y-coordinate；The display area bx=upper right corner x coordinate；The display area by=upper right corner y-coordinate；The display area cx=lower left corner x is sat
Mark；The display area cy=lower left corner y-coordinate；The display area dx=lower right corner x coordinate；The display area dy=lower right corner y-coordinate；w
=display area horizontal pixel summation；The display area h=longitudinal direction pixel summation；
Touch bright spot x coordinate=((x1-ax)/(bx-ax)) * w in screen
Touch bright spot y-coordinate=((y1-cy)/(ay-cy)) * h in screen.
Beneficial effect：Wall section can be realized in camera of the present invention using infrared transmitter and with infrared fileter
Touch function, big region uses, it is only necessary to add infrared transmitter and the camera with infrared fileter again.With
For 150 cun, it is only necessary to 4 infrared transmitters and 1 camera with infrared fileter.Than traditional infrared frame easily 100
To infrared transmitter and receiver corporation, cost is substantially reduced；And not needing frame can be realized touch function.
Detailed description of the invention
Fig. 1 is the schematic diagram that the infrared frame of the prior art realizes arbitrary plane touch control operation.
Fig. 2 is the metope touch-control system structural schematic diagram the present invention is based on preschool education.
Fig. 3 is that the present invention is based on schematic diagrames when the use of the metope touch-control system of preschool education.
Specific embodiment
Have choosing below technical solution of the present invention to be further described embodiment.
Referring to figure 2. and Fig. 3, the present embodiment use camera 1 of 4 infrared transmitters 2 and 1 with infrared fileter
The touch function of arbitrary plane is realized in combination.
For projector 4 by image projection on front projection curtain cloth 5, each for being fixed on 3 four angles in projected display region is infrared
Optical transmitting set is parallel to the fan-shaped infrared light of display area transmitting, and four fan-shaped infrared lights form one and are parallel to display area
Infrared optical plane.When finger touch is to projection plane, infrared light can be stopped, and form luminous point in finger areas.With infrared
The camera of optical filter captures bright spot, and calculates bright spot in the position of display area, determines the coordinate touched, realizes touch-control behaviour
Make.
The present embodiment can be realized within 150 cun using 4 infrared transmitters and 1 camera with infrared fileter
The touch function in region, 150 cun or more of region only need to add 2 infrared transmitters and 1 again with infrared fileter
Camera.
The above embodiments are only used to illustrate the present invention, and the simultaneously limitation of non-present invention, the common skill in relation to technical field
Art personnel can make variation and deformation, therefore all equivalent skills without departing from the spirit and scope of the present invention
Art scheme also belongs to scope of the invention.
Claims (5)
1. the metope touch-control system based on preschool education, which is characterized in that be arranged at least in the edge of projected display region (3)
One infrared transmitter (2), infrared transmitter (2) are parallel to the infrared light of projected display region (3) transmitting planar, are formed
One infrared optical plane can stop infrared light, and form light in finger areas when finger touch to projected display region (3)
Point；Camera (1) with infrared fileter captures bright spot, and calculates bright spot in the position of projected display region (3), determines touching
The coordinate touched realizes touch control operation.
2. the metope touch-control system according to claim 1 based on preschool education, which is characterized in that in projected display region
(3) infrared transmitter (2) is respectively set at four angles.
3. the metope touch-control system according to claim 1 or 2 based on preschool education, which is characterized in that the planar
Infrared light is sector.
4. the metope touch-control system according to claim 3 based on preschool education, which is characterized in that if it is 150 cun with
On projected display region (3), then 2 infrared transmitters (2) and 1 camera (1) with infrared fileter are set.
5. the metope touch-control system according to claim 1 based on preschool education, which is characterized in that calculate bright spot and projecting
The specific calculating process of the position of display area (3) is：Definition：The x coordinate of x1=bright spot in the picture；Y1=bright spot is in image
In y-coordinate；The display area ax=upper left corner x coordinate；The display area ay=upper left corner y-coordinate；The display area bx=upper right corner x
Coordinate；The display area by=upper right corner y-coordinate；The display area cx=lower left corner x coordinate；The display area cy=lower left corner y-coordinate；
The display area dx=lower right corner x coordinate；The display area dy=lower right corner y-coordinate；The display area w=horizontal pixel summation；H=is aobvious
Show region longitudinal direction pixel summation；
Touch bright spot x coordinate=((x1-ax)/(bx-ax)) * w in screen
Touch bright spot y-coordinate=((y1-cy)/(ay-cy)) * h in screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810705449.6A CN108874241A (en) | 2018-07-02 | 2018-07-02 | Metope touch-control system based on preschool education |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810705449.6A CN108874241A (en) | 2018-07-02 | 2018-07-02 | Metope touch-control system based on preschool education |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108874241A true CN108874241A (en) | 2018-11-23 |
Family
ID=64297731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810705449.6A Pending CN108874241A (en) | 2018-07-02 | 2018-07-02 | Metope touch-control system based on preschool education |
Country Status (1)
| Country | Link |
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| CN (1) | CN108874241A (en) |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181123 |
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