CN105912145A - Laser pen mouse system and image positioning method thereof - Google Patents
Laser pen mouse system and image positioning method thereof Download PDFInfo
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- CN105912145A CN105912145A CN201610235332.7A CN201610235332A CN105912145A CN 105912145 A CN105912145 A CN 105912145A CN 201610235332 A CN201610235332 A CN 201610235332A CN 105912145 A CN105912145 A CN 105912145A
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- 238000006073 displacement reaction Methods 0.000 claims description 33
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- 238000006243 chemical reaction Methods 0.000 claims description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 5
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 5
- 238000005304 joining Methods 0.000 claims description 5
- 239000004571 lime Substances 0.000 claims description 5
- 101100370002 Mus musculus Tnfsf14 gene Proteins 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 241000931526 Acer campestre Species 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000009432 framing Methods 0.000 claims description 3
- 238000013507 mapping Methods 0.000 abstract description 7
- 230000003993 interaction Effects 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 2
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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
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03545—Pens or stylus
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- G06T5/70—
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/20—Special algorithmic details
- G06T2207/20048—Transform domain processing
- G06T2207/20061—Hough transform
Abstract
The invention discloses a laser pen mouse system and an image positioning method thereof and relates to the field of laser pen-mouse interaction. The system includes a host, a display module, a central processing module, a camera module and a laser pen mouse. The central processing module is used for implementing screen positioning through a projection screen positioning algorithm and implementing mapping of screen coordinates to host system coordinates through a screen coordinate system. When the laser pen mouse emits laser, the coordinates to effective laser points in a projection image is mapped to the coordinates of a host system screen through a laser coordinate system mapping algorithm. When laser emitted by the laser pen mouse shifts, the movement of a system mouse cursor is controlled through a mouse coordinate anti-jitter algorithm. The system provided by the invention has functions of a laser pen and a mouse at the same time. The function is complete and the use is convenient, so that user experience is good.
Description
Technical field
The present invention relates to the mutual field of laser pen and mouse, be specifically related to a kind of laser pen mouse
System and image position method thereof.
Background technology
Carrying out in the occasion given a lecture by projector needing, speaker is in order to be able to guide spectators'
Sight line, commonly used laser pen indicates speech content on the projection screen, strengthens speech effect with this
Really.But, the function that laser and page turning etc. are limited is only launched due to traditional laser pen, its
He completes by operation still handy mouse；The most traditional laser pen still can give speaker when using
Cause inconvenience, the fluency of impact speech.
In order to solve the problems referred to above, market occurs in that electronic whiteboard and sky based on motion sensing control
Middle mouse, but electronic whiteboard and air mouse are respectively present following defect:
(1) electronic whiteboard is the most expensive, and use cost is higher, and mobile spirit not
Living, Consumer's Experience is poor.
(2) air mouse lacks laser indication function, is not easy to people and uses.
Summary of the invention
For defect present in prior art, present invention solves the technical problem that into: provide one
Having the laser mouse mark system of laser pen and mouse function, the present invention not only function compares simultaneously
Comprehensively, and use more convenient, better user experience.
For reaching object above, the laser mouse mark system that the present invention provides, including main frame with aobvious
Showing module, this system also includes photographing module and laser pen mouse；Photographing module includes photographic head；
Central processing module and laser mouse target receptor it is provided with on main frame；Laser mouse is put on and is set
It is equipped with laser switch button, the left function button of corresponding left mouse button and corresponding right mouse button
Right function button；
When described laser mouse mark system carries out framing: central processing module passes through projection screen
Curtain location algorithm completes screen location；The projected picture that photographic head is caught by central processing module enters
Row Hough transformation, identifies the straight line in projected picture；The central processing module straight line to identifying
Carry out Corner Detection, after obtaining the joining of straight line, calculate distance projected picture center
Four near points are as four angle points of host computer system screen；
When laser pen mouse sends laser, central processing module identification laser brightness is bright set
Point more than degree threshold value and in screen ranges is effective laser spots；Central processing module will have
Effect laser spots carries out Coordinate Conversion, according to effective laser spots at the coordinate of projection screen, calculates
To effective laser spots coordinate of cursor of mouse in host computer system screen；
When the laser that laser pen mouse sends produces displacement, central processing module is calculated main frame
The coordinate of cursor of mouse corresponding with the laser spots after displacement in system screen, central processing module
Calculate the difference of the coordinate of cursor of mouse before and after displacement and judge whether this difference is setting mouse
More than displacement threshold value, if so, using the coordinate of the cursor of mouse after displacement as changing coordinates, no
The coordinate of the cursor of mouse before then holding changing coordinates is displacement；
When the left function button of laser mouse target or right function button are pressed, laser pen mouse will be with
The left button of standard mouse or the information of right button identical function, send main frame to by receptor, main
Machine performs corresponding left button or right button function in system screen.
On the basis of technique scheme, the idiographic flow of described projection screen location algorithm
For: main frame successively transmission white lime two width picture shows on screen to projector and by projector
Showing, shooting can capture two width projected pictures and be back to central processing module；Central authorities process mould
Image array corresponding for two width projected pictures is subtracted each other by block, obtains the position of screen.
On the basis of technique scheme, the throwing that photographic head is caught by described central processing module
Before shadow picture carries out Hough transformation, need projected picture carries out fuzzy denoising.
On the basis of technique scheme, described central processing module calculates distance projection
After four points that picture center is nearest, after needing four points are carried out perspective transform, obtain main frame system
Four angle points of system screen.
On the basis of technique scheme, described luminance threshold is positioned at screen intensity and laser pen
Between the laser brightness that mouse sends.
On the basis of technique scheme, described photographing module also includes that is positioned at a photographic head
Front optical filter, the centre wavelength of optical filter is identical with the optical maser wavelength of laser pen mouse emitting.
The present invention provide image position method based on above-mentioned laser mouse mark system, including with
Lower step:
A, central processing module complete screen by projection screen location algorithm and position；
The projected picture that photographic head is caught by B, central processing module carries out Hough transformation, identifies
Straight line in projected picture；The central processing module straight line to identifying carries out Corner Detection, obtains
After the joining of cut-off line, calculate four nearest points of distance projected picture center as master
Four angle points of machine system screen；
When C, laser pen mouse send laser, central processing module identification laser brightness is setting
Luminance threshold more than and point in screen ranges be effective laser spots；Central processing module
Effective laser spots is carried out Coordinate Conversion, according to effective laser spots at the coordinate of projection screen, counts
Calculate and obtain effective laser spots coordinate of cursor of mouse in host computer system screen；
When the laser that D, laser pen mouse send produces displacement, central processing module is according to step
The mode of C, is calculated mouse light corresponding with the laser spots after displacement in host computer system screen
Target coordinate；Central processing module calculates the difference of the coordinate of cursor of mouse before and after displacement and sentences
Whether this difference disconnected is setting more than mouse displacement threshold value, if so, by the cursor of mouse after displacement
Coordinate as changing coordinates, the seat otherwise keeping changing coordinates to be the cursor of mouse before displacement
Mark.
On the basis of technique scheme, the idiographic flow of step A is: main frame is successively sent out
Sending white lime two width picture to show on screen to projector and by projector, shooting can catch
To two width projected pictures and be back to central processing module；Central processing module is by two width shadowgraphs
Image array corresponding to face subtracts each other, and obtains the position of screen.
On the basis of technique scheme, described in step B, central processing module is to shooting
Before the projected picture that head catches carries out Hough transformation, need projected picture carries out fuzzy going
Make an uproar；It is nearest that central processing module described in step B calculates distance projected picture center
After four points, after needing four points are carried out perspective transform, obtain four angles of host computer system screen
Point.
On the basis of technique scheme, before step A, also include below scheme: main frame
Display signal is projected to screen by display module, after photographic head catches the projected picture of screen
It is back to central processing module；Central processing module judges that projected picture is completely in photographic head model
When enclosing interior, catch pass signal to main frame feedback, forward step A to.
Compared with prior art, it is an advantage of the current invention that:
The present invention can complete screen by projection screen location algorithm and position, and passes through screen coordinate
System mapping algorithm completes the screen coordinate mapping to host computer system coordinate；Laser pen mouse sends
During laser, by laser coordinate system mapping algorithm, by effective laser spots at the seat of projected picture
Mark maps in the coordinate of host computer system screen；The laser that laser pen mouse sends produces displacement
Time, moved by mouse coordinates debounce algorithm controls system mouse light target.
Meanwhile, the laser pen mouse of the present invention also has a left side for corresponding mark mouse right and left key
Right function button；Therefore, with function in prior art laser pen and air mouse phase not comprehensively
Ratio, the present invention is provided simultaneously with laser pen and mouse function, better user experience；With prior art
In the electronic whiteboard of underaction expensive, mobile compare, the production cost of the present invention is relatively low,
Time mobile as traditional laser pen, the most flexibly, it is simple to people use.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of laser mouse mark system in the embodiment of the present invention；
Fig. 2 is the flow process of the image position method of laser mouse mark system in the embodiment of the present invention
Figure.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Laser mouse mark system shown in Figure 1, in the embodiment of the present invention, including main frame (example
Such as personal computer, notebook computer etc.), display module (such as projector), photographing module
With laser pen mouse.Photographing module include a photographic head and one be positioned at the optical filtering before photographic head
Sheet, the centre wavelength of optical filter is identical with the optical maser wavelength of laser pen mouse emitting；Set on main frame
It is equipped with central processing module and laser mouse target receptor；Laser mouse is put on and is provided with laser
Switch key, the left function button of corresponding left mouse button and the right function of corresponding right mouse button
Button.
Shown in Figure 2, the framing side of the laser mouse mark system in the embodiment of the present invention
Method, comprises the following steps:
Display signal is projected to screen, the shooting that user selects by S1: main frame by display module
It is back to central processing module after the projected picture of head seizure screen.
At S1 and afterwards during step, optical filter can catch projected picture at photographic head
During can filter major part ambient light, through less is more reflection light and whole laser-bounce
Light.
After S2: central processing module receives the projected picture that photographic head catches, it is judged that projected picture
In the range of whether being completely in photographic head, if so, catch pass signal to main frame feedback, forward to
S3；Otherwise to main frame feedback catch failure signal, now need user adjust photographic head position,
Angle, focal length, allow projected picture be in photographic head catching range and to re-execute S2.
S3: central processing module completes screen by projection screen location algorithm and positions.
The idiographic flow of S3 is: main frame successively sends white lime two width picture and to projector and leads to
Crossing projector to show on screen, photographic head can capture two width projected pictures and be back to central authorities
Processing module；Image array corresponding for two width projected pictures is subtracted each other, with this by central processing module
Reaching effectively to remove background noise, throwing even if also being able to obtain in the case of illumination light is very strong
The purpose of the position of shadow screen.
S4: central processing module completes screen coordinate to main by screen coordinate system mapping algorithm
The mapping of machine system coordinates.
The idiographic flow of S4 is: the projected picture that photographic head is caught by central processing module is carried out
Hough transformation, identifies the straight line in projected picture；In order to ensure that Hough transformation does not haves straight line
Erroneous judgement, central processing module carries out fuzzy denoising before Hough transformation.Central processing module is to knowledge
The straight line not gone out carries out Corner Detection, after obtaining the joining of straight line, calculates distance projection
Nearest four points in picture center are as four angle points of host computer system screen.Due to projected picture
Perspective distortion can be there is, need to carry out perspective transform, after conversion after therefore calculating four points
Obtain host computer system screen (laser spots can be comprised in the case of having laser spots).
S5: when laser pen mouse sends laser, central processing module is reflected by laser coordinate system
Penetrate effective laser spots of algorithm identification projection screen, by effective laser spots at the coordinate of projected picture
Map in the coordinate of host computer system screen.
The idiographic flow of S5 is: central processing module sets 1 luminance threshold (luminance threshold
Between the laser brightness that screen intensity and laser pen mouse send, occurrence is according to different
Use scene is adjustable).When laser pen mouse sends laser, central processing module identification laser is bright
Degree point more than luminance threshold and in screen ranges is effective laser spots；Central authorities process mould
Effective laser spots is carried out Coordinate Conversion by block, according to effective laser spots at the coordinate of projection screen,
It is calculated effective laser spots coordinate of cursor of mouse in host computer system screen.
S6: when the laser that laser pen mouse sends produces displacement, central processing module passes through mouse
Coordinate debounce algorithm controls system mouse light target moves.
The idiographic flow of S6 is: central processing module sets 1 mouse displacement threshold value (mouse
Displacement threshold value is adjustable according to different use scenes)；The laser that laser pen mouse sends produces position
During shifting, central processing module, according to the mode of S5, is calculated in host computer system screen and position
The coordinate of the cursor of mouse that laser spots after shifting is corresponding.Central processing module calculates Mus before and after displacement
The mark light target coordinate (seat of the cursor of mouse after the coordinate of the cursor of mouse of lead of ascending the throne, displacement
Mark) difference and judge this difference whether more than mouse displacement threshold value, if so, by displacement
After the coordinate of cursor of mouse as changing coordinates, otherwise keeping changing coordinates is the Mus before displacement
Mark light target coordinate.
When pressing the left function button of laser mouse target or right function button, laser pen mouse will
With standard mouse left button or the information of right button identical function, send main frame to by receptor, enter
And realize left button or the right button function of standard mouse.
The present invention is not limited to above-mentioned embodiment, for those skilled in the art
For, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications,
Within these improvements and modifications are also considered as protection scope of the present invention.This specification is not made in detail
The content described belongs to prior art known to professional and technical personnel in the field.
Claims (10)
1. a laser mouse mark system, including main frame and display module, it is characterised in that:
This system also includes photographing module and laser pen mouse；Photographing module includes photographic head；On main frame
It is provided with central processing module and laser mouse target receptor；Laser mouse put on be provided with sharp
Photoswitch button, the left function button of corresponding left mouse button and the right merit of corresponding right mouse button
Can button；
When described laser mouse mark system carries out framing: central processing module passes through projection screen
Curtain location algorithm completes screen location；The projected picture that photographic head is caught by central processing module enters
Row Hough transformation, identifies the straight line in projected picture；The central processing module straight line to identifying
Carry out Corner Detection, after obtaining the joining of straight line, calculate distance projected picture center
Four near points are as four angle points of host computer system screen；
When laser pen mouse sends laser, central processing module identification laser brightness is bright set
Point more than degree threshold value and in screen ranges is effective laser spots；Central processing module will have
Effect laser spots carries out Coordinate Conversion, according to effective laser spots at the coordinate of projection screen, calculates
To effective laser spots coordinate of cursor of mouse in host computer system screen；
When the laser that laser pen mouse sends produces displacement, central processing module is calculated main frame
The coordinate of cursor of mouse corresponding with the laser spots after displacement in system screen, central processing module
Calculate the difference of the coordinate of cursor of mouse before and after displacement and judge whether this difference is setting mouse
More than displacement threshold value, if so, using the coordinate of the cursor of mouse after displacement as changing coordinates, no
The coordinate of the cursor of mouse before then holding changing coordinates is displacement；
When the left function button of laser mouse target or right function button are pressed, laser pen mouse will be with
The left button of standard mouse or the information of right button identical function, send main frame to by receptor, main
Machine performs corresponding left button or right button function in system screen.
2. laser mouse mark system as claimed in claim 1, it is characterised in that: described throwing
The idiographic flow of shadow screen location algorithm is: main frame successively transmission white lime two width picture to projector,
And shown on screen, during shooting can capture two width projected pictures and be back to by projector
Centre processing module；Image array corresponding for two width projected pictures is subtracted each other by central processing module,
Position to screen.
3. laser mouse mark system as claimed in claim 1, it is characterised in that: in described
Before the projected picture that photographic head is caught by centre processing module carries out Hough transformation, need projection
Picture carries out fuzzy denoising.
4. laser mouse mark system as claimed in claim 1, it is characterised in that: in described
After centre processing module calculates four points that distance projected picture center is nearest, need four
Point obtains four angle points of host computer system screen after carrying out perspective transform.
5. laser mouse mark system as claimed in claim 1, it is characterised in that: described bright
Degree threshold value is between the laser brightness that screen intensity and laser pen mouse send.
6. the laser mouse mark system as described in any one of claim 1 to 5, its feature exists
In: described photographing module also include one be positioned at photographic head before optical filter, the center of optical filter
Wavelength is identical with the optical maser wavelength of laser pen mouse emitting.
7. an image position method based on the laser mouse mark system described in claim 1,
It is characterized in that, the method comprises the following steps:
A, central processing module complete screen by projection screen location algorithm and position；
The projected picture that photographic head is caught by B, central processing module carries out Hough transformation, identifies
Straight line in projected picture；The central processing module straight line to identifying carries out Corner Detection, obtains
After the joining of cut-off line, calculate four nearest points of distance projected picture center as master
Four angle points of machine system screen；
When C, laser pen mouse send laser, central processing module identification laser brightness is setting
Luminance threshold more than and point in screen ranges be effective laser spots；Central processing module
Effective laser spots is carried out Coordinate Conversion, according to effective laser spots at the coordinate of projection screen, counts
Calculate and obtain effective laser spots coordinate of cursor of mouse in host computer system screen；
When the laser that D, laser pen mouse send produces displacement, central processing module is according to step
The mode of C, is calculated mouse light corresponding with the laser spots after displacement in host computer system screen
Target coordinate；Central processing module calculates the difference of the coordinate of cursor of mouse before and after displacement and sentences
Whether this difference disconnected is setting more than mouse displacement threshold value, if so, by the cursor of mouse after displacement
Coordinate as changing coordinates, the coordinate otherwise keeping changing coordinates to be the cursor of mouse before displacement.
8. image position method as claimed in claim 7, it is characterised in that: step A
Idiographic flow is: main frame successively transmission white lime two width picture exists to projector and by projector
Showing on screen, shooting can capture two width projected pictures and be back to central processing module；In
Image array corresponding for two width projected pictures is subtracted each other by centre processing module, obtains the position of screen.
9. image position method as claimed in claim 7, it is characterised in that: in step B
Before the projected picture that photographic head is caught by described central processing module carries out Hough transformation, need
Projected picture is carried out fuzzy denoising；Central processing module described in step B calculate away from
After four points that projected picture center is nearest, obtain after needing four points are carried out perspective transform
Four angle points of host computer system screen.
10. the image position method as described in any one of claim 7 to 9, it is characterised in that:
Also include below scheme before step A: main frame by display signal by display module project to
Screen, is back to central processing module after the projected picture of photographic head seizure screen；Central authorities process
Module judges when projected picture is completely in the range of photographic head, catches to main frame feedback and successfully believes
Number, forward step A to.
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Cited By (11)
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| CN106598288A (en) * | 2016-11-22 | 2017-04-26 | 张新民 | Positioning system and method for laser pen mouse |
| CN106933376A (en) * | 2017-03-23 | 2017-07-07 | 哈尔滨拓博科技有限公司 | A kind of scaling method of smooth projected keyboard |
| CN107491192A (en) * | 2017-08-08 | 2017-12-19 | 吉林大学 | A kind of camera shooting mouse laser pen alignment system and localization method |
| CN108021243A (en) * | 2016-10-31 | 2018-05-11 | 中国移动通信有限公司研究院 | A kind of virtual mouse method for determining position, apparatus and system |
| CN110297556A (en) * | 2019-07-02 | 2019-10-01 | 沈阳理工大学 | A kind of electronic projection drawing board system and its processing method based on image recognition technology |
| CN110599822A (en) * | 2019-08-28 | 2019-12-20 | 湖南优美科技发展有限公司 | Voice blackboard-writing display method, system and storage medium |
| CN111309203A (en) * | 2020-01-22 | 2020-06-19 | 深圳市格上视点科技有限公司 | Method and device for acquiring positioning information of mouse cursor |
| CN112286379A (en) * | 2020-11-19 | 2021-01-29 | 安徽鸿程光电有限公司 | Cursor positioning method, device, equipment and computer readable storage medium |
| CN112738490A (en) * | 2020-12-28 | 2021-04-30 | 慧投科技（深圳）有限公司 | Projection method of electronic conference whiteboard system without calibration |
| CN113050113A (en) * | 2021-03-10 | 2021-06-29 | 广州南方卫星导航仪器有限公司 | Laser point positioning method and device |
| CN114428571A (en) * | 2020-10-29 | 2022-05-03 | 深圳Tcl新技术有限公司 | Interaction method, computer equipment and computer readable storage medium |
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| CN111309203A (en) * | 2020-01-22 | 2020-06-19 | 深圳市格上视点科技有限公司 | Method and device for acquiring positioning information of mouse cursor |
| CN114428571A (en) * | 2020-10-29 | 2022-05-03 | 深圳Tcl新技术有限公司 | Interaction method, computer equipment and computer readable storage medium |
| CN112286379A (en) * | 2020-11-19 | 2021-01-29 | 安徽鸿程光电有限公司 | Cursor positioning method, device, equipment and computer readable storage medium |
| CN112286379B (en) * | 2020-11-19 | 2023-12-26 | 安徽鸿程光电有限公司 | Cursor positioning method, device, equipment and computer readable storage medium |
| CN112738490A (en) * | 2020-12-28 | 2021-04-30 | 慧投科技（深圳）有限公司 | Projection method of electronic conference whiteboard system without calibration |
| CN113050113A (en) * | 2021-03-10 | 2021-06-29 | 广州南方卫星导航仪器有限公司 | Laser point positioning method and device |
| CN113050113B (en) * | 2021-03-10 | 2023-08-01 | 广州南方卫星导航仪器有限公司 | Laser spot positioning method and device |
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Application publication date: 20160831 |