CN107885315B - A method of improving touch-control system tracking precision - Google Patents
A method of improving touch-control system tracking precision Download PDFInfo
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- CN107885315B CN107885315B CN201610866305.XA CN201610866305A CN107885315B CN 107885315 B CN107885315 B CN 107885315B CN 201610866305 A CN201610866305 A CN 201610866305A CN 107885315 B CN107885315 B CN 107885315B
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- area
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- screen
- host
- finger contact
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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
- G06F3/017—Gesture based interaction, e.g. based on a set of recognized hand gestures
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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
- G06F3/0425—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected
Abstract
The invention discloses a kind of methods for improving touch-control system tracking precision, by the way that screen to be divided into different regions, acquire the size of finger contact area in different zones, and then the area for calculating different zones maps ratio, not the problem of very good solution test point area is not equal proportion, the method is flexible and changeable, will not make stringent limitation to the placement position of camera and screen, allow user's deployment system when more flexible freedom.
Description
Technical field
The present invention relates to screen point track following technical field, especially a kind of side for improving touch-control system tracking precision
Method.
Background technique
With the development of computer technology and digital image processing techniques, the application field of computer vision technique is rapid
It widens, target following has become one very active project of computer vision field.Moving target automatically tracks control system
The realization purpose of system is to acquire the sequence of video images of target with camera, and analyzes the fortune of target in real time by computer
It is dynamic, the kinematic parameter of target is obtained, is directed toward target always according to control camera in this, as main.
Placement position due to camera relative to screen, area of the same finger in different screen region is different, point
When solving motion profile, can lead to the problem of monitoring point area is not equal proportion.
Summary of the invention
To solve the above-mentioned problems, the invention proposes a kind of methods for improving touch-control system tracking precision.
Concrete scheme of the invention is as follows：
A method of improve touch-control system tracking precision, the touch-control system include screen (1), video camera (2) and
Host (3), video camera (2) are connect with host (3) by data line, and host (3) is connect with screen (1) by video line, step
It is as follows：
S1：Video camera (2) captures image of the finger on screen (1), is transferred to the host (3)；
S2：The host (3) receives the image that the video camera (2) is transmitted, the seat of each finger contact in detection image
Mark and area, the average area of each region finger contact is calculated according to the coordinate of finger contact；
S3：The host (3) calculates the area mapping ratio in each region according to above-mentioned calculated result, and is stored in master
In machine (3).
Preferably, calculated in the step S3 each region area mapping ratio formula be：Finger in each region
The average area of finger contact in average area/the first region of contact.
Preferably, the step S1 further includes that host (3) divide region.
Preferably, the calculation formula of the average area of each region finger contact is in the step S2：Each region institute
There is adduction/finger contact number of finger contact area.
Preferably, area is colour brightness, one in color difference in the step S2.
Compared with prior art, the present invention having the advantages that：
A kind of method improving touch-control system tracking precision proposed by the present invention is different zones by dividing screen,
And the method that calculates each region area mapping ratio, the problem of very good solution test point area is not equal proportion.This side
Method is flexible and changeable, will not make stringent limitation to the placement position of camera and screen, allow user's deployment system when it is more flexible
Freely.
Detailed description of the invention
Fig. 1 is that a kind of finger continuous touch screen of method for improving touch-control system tracking precision proposed by the present invention shows
It is intended to；
Fig. 2 is that a kind of finger of method for improving touch-control system tracking precision proposed by the present invention discontinuously touches screen and shows
It is intended to；
Fig. 3 is the schematic diagram of touch-control system of the invention.
Detailed description of the invention：
1 screen, 2 video camera, 3 host
Specific embodiment
Below in conjunction with the specific embodiment technical solution that present invention be described in more detail.It should be appreciated that being described herein as
Specific embodiment be only used to explain the present invention, be not intended to limit the present invention.
Fig. 3 is the schematic diagram of touch-control system of the invention, and touch-control system includes screen (1), video camera (2) and host (3),
Video camera (2) is connect with host (3) by data line, and host (3) is connect with screen (1) by video line, video camera (2) shooting
Image transmitting on screen (1) is given host (3), after host (3) carries out calculation processing to image, is sent to screen (1), shows
Come.
After having disposed smart screen system, it will form the such as video camera (2) of Fig. 3 and screen (1) and put relationship, user
Calibration decision is issued, screen (1) is divided into 4*5=20 rectangular area by host (3), and the calibration page, finger occurs in screen (1)
It is clicked on screen (1) or continuously slipping, video camera (2) captures image of the finger on screen (1), is transferred to the host
(3), the host (3) receives the image that the video camera (2) is transmitted, the coordinate of each finger contact and face in detection image
Product, the average area of each region finger contact is calculated according to the coordinate of finger contact, calculation formula is：Each all hands in region
Refer to adduction/finger contact number of contact area；The host (3) calculates the face in each region according to above-mentioned calculated result
Product mapping ratio, calculation formula are that finger contact is averaged in average area/the first region of finger contact in each region
Calculated result is stored in host (3) by area, in case the later period uses.
There are two types of specific scaling methods：The first scaling method is：As shown in Fig. 2, user is touched in each region with finger
Dynamic primary, video camera (2) captures image of the finger on screen (1), is transferred to the host (3), and the host (3) receives institute
The image that video camera (2) transmits is stated, image is detected, is tracked, wherein according to the rectangular area of division, first frame finger
Contact is located at first region, and coordinate is (X1,Y1), area S1, the second frame finger contact is located at Two Areas, sits
It is designated as (X2,Y2), area S2,, third frame finger contact is located at third region, and coordinate is (X3,Y3), area S3...
20th frame finger contact is located at the 20th region, and coordinate is (X20,Y20), area S20.According to the above results, calculate each
The mapping ratio in region, wherein the mapping ratio in first region is 1, the mapping ratio of Two Areas is S2/S1, third
The mapping ratio in region is S3/S1... the mapping ratio in the 20th region is S20/S1；Second of scaling method be：Such as Fig. 1 institute
Show, user operates one time in each region continuity, and video camera (2) captures image of the finger on screen (1), is transferred to described
Host (3), the host (3) receive the image that the video camera (2) is transmitted, are detected, tracked to image, wherein first
The coordinate of frame finger contact is (X1,Y1), area S1, the coordinate of the second frame finger contact is (X2,Y2), area S2, third
The coordinate of frame finger contact is (X3,Y3), area S3, the coordinate of the 4th frame finger contact is (X4,Y4), area S4, the 5th
The coordinate of frame finger contact is (X5,Y5), area S5, the coordinate of the 6th frame finger contact is (X6,Y6), area S6, the 7th
The coordinate of frame finger contact is (X7,Y7), area S7... the coordinate of nth frame finger contact is (Xn,Yn), area Sn, according to
The region of division, if coordinate (X1,Y1)、(X2,Y2)、(X3,Y3) it is located at first region, then finger contact in first region
Average area is (S1+S2+S3)/3, if coordinate (X4,Y4)、(X5,Y5)、(X6,Y6)、(X7,Y7) be located at Two Areas, then second
The average area of finger contact is (S in a region4+S5+S6+S7)/4 similarly calculate the flat of finger contact in each region
Equal area calculates the area mapping ratio in each region, wherein the area in first region maps ratio according to above-mentioned calculated result
Example is 1, and the area mapping ratio of Two Areas is (3 (S4+S5+S6+S7)〕/〔4(S1+S2+S3)), similarly calculate 20 regions
Area map ratio, and 20 areas mapping ratios are stored in host (3).After the completion of engineering staff implements, this area
Mapping ratio just can be used for other people operations on the screen, other people no longer need to re-scale this process.The method exists
It is carried out after fixing camera and screen, if calibration process will re-start after the variation of the relative position of camera and screen.
It is above-mentioned to screen area divide number can according to the actual situation depending on, such as 2*2,4*6,4*5 etc. can also be with
Not to scale (NTS) is divided.
Pass through the mapping ratio of above-mentioned similar principle also available colour brightness, color difference etc..
In conclusion a kind of method for improving touch-control system tracking precision proposed by the present invention, is by dividing screen
Different zones, and the method for calculating each region area mapping ratio, very good solution test point area is not equal proportion
Problem.The method is flexible and changeable, will not make stringent limitation to the placement position of camera and screen, allow user's deployment system when
More flexible freedom.
Above embodiment is the preferred embodiment of the present invention, is not intended to limit patent protection model of the invention
It encloses.Those skilled in the art belonging to any present invention, in the premise for not departing from spirit and scope disclosed in this invention
Under, the transformation of the equivalent structure and equivalent steps that done to the contents of the present invention each falls within claimed the scope of the patents
Within.
Claims (1)
1. a kind of method for improving touch-control system tracking precision, the touch-control system includes screen (1), video camera (2) and master
Machine (3), video camera (2) are connect with host (3) by data line, and host (3) is connect with screen (1) by video line, feature
It is, steps are as follows：
S1：Screen (1) is divided into multiple regions by the calibration decision that host (3) is issued according to user, and calibration page occurs in screen (1)
Face, finger are clicked or continuously slipping on screen (1), and video camera (2) captures image of the finger on screen (1), are transferred to institute
State host (3)；
S2：The host (3) receives the image that the video camera (2) is transmitted, in detection image the coordinate of each finger contact and
Area calculates the average area of each region finger contact according to the coordinate of finger contact；
S3：The host (3) calculates the area mapping ratio in each region according to above-mentioned calculated result, and is stored in host (3)
In；
Wherein, the calculation formula of the average area of each region finger contact is in the step S2：Each all fingers in region
Adduction/finger contact number of contact area；
Wherein, calculated in the step S3 each region area mapping ratio formula be：Finger contact in each region
The average area of finger contact in average area/the first region.
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| CN201610866305.XA CN107885315B (en) | 2016-09-29 | 2016-09-29 | A method of improving touch-control system tracking precision |
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| CN201610866305.XA CN107885315B (en) | 2016-09-29 | 2016-09-29 | A method of improving touch-control system tracking precision |
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| CN107885315A CN107885315A (en) | 2018-04-06 |
| CN107885315B true CN107885315B (en) | 2018-11-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111880676B (en) * | 2020-06-22 | 2022-03-15 | 深圳市鸿合创新信息技术有限责任公司 | Partition touch control method and device, electronic equipment and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006085580A1 (en) * | 2005-02-10 | 2006-08-17 | Takram Design Engineering | Pointer light tracking method, program, and recording medium thereof |
| CN101634914A (en) * | 2008-07-22 | 2010-01-27 | 福州星网视易信息系统有限公司 | Three-point calibration method based on nonuniform touch screen |
| CN101917631A (en) * | 2010-07-30 | 2010-12-15 | 浙江大学 | Projection display color reproduction method under normal lighting environment |
-
2016
- 2016-09-29 CN CN201610866305.XA patent/CN107885315B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006085580A1 (en) * | 2005-02-10 | 2006-08-17 | Takram Design Engineering | Pointer light tracking method, program, and recording medium thereof |
| CN101634914A (en) * | 2008-07-22 | 2010-01-27 | 福州星网视易信息系统有限公司 | Three-point calibration method based on nonuniform touch screen |
| CN101917631A (en) * | 2010-07-30 | 2010-12-15 | 浙江大学 | Projection display color reproduction method under normal lighting environment |
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| CN107885315A (en) | 2018-04-06 |
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