CN102495695A - Multipoint touch identification method of infrared diode touch screen as well as touch device and system - Google Patents
Multipoint touch identification method of infrared diode touch screen as well as touch device and system Download PDFInfo
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- CN102495695A CN102495695A CN2011103804415A CN201110380441A CN102495695A CN 102495695 A CN102495695 A CN 102495695A CN 2011103804415 A CN2011103804415 A CN 2011103804415A CN 201110380441 A CN201110380441 A CN 201110380441A CN 102495695 A CN102495695 A CN 102495695A
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Abstract
The invention provides a bitmap-based multipoint touch identification method of an infrared diode touch screen, a multipoint touch device and an infrared diode touch screen system. The multipoint touch identification method comprises the steps of: recording every pixel in the touch region of the touch screen in a bitmap form; scanning the touch screen in any multiple scanning directions; recording the times of every pixel located in a blocked region or a unblocked region in each scanning direction in the bitmap; and identifying the pixel set, of which the times in the blocked region is equal to the scanning times, as the position of an actual touch region and a touch point. According to the invention, the consumption of operation resources is reduced, the operation time is saved, and theoretically infinite touch points can be accurately identified.
Description
Technical field
The present invention relates to the touch point recognition technology of infrared tube touch-screen, relate in particular to a kind of multi-touch recognition method that is used for the infrared tube touch-screen, multipoint touching device and infrared tube touch-screen system based on bitmap.
Background technology
The infrared tube touch-screen detects through paired infrared emission, the infrared receiver device of a circle whether two pipes are middle has shelter to come recognizing touch operation.At present, the infrared tube touch-screen can obtain to put more logic touch point than actual touch when carrying out the judgement of multiple point touching.Having greatly in these logic touch points is " pseudo-point ", and promptly in fact this position is not touched.Like figure below:
At present, can attempt to remove part " pseudo-point " through software algorithm, but can't accomplish thoroughly to go puppet, count more for a long time error probability bigger (in fact, only can accomplish 2 touches at present) through this method.
In addition, the data of the non-scanning over against infrared device of a kind of usefulness (tilted direction scanning) are arranged at present, judge through vector calculus, straight-line intersection, distance and wait the multi-point recognizing method of realizing, be shown in the following figure.This mode needs to consume a large amount of calculation resources and time owing in calculating process, relate to computing between a large amount of straight lines, and this consumption can count with touch usually and be 2 even 3 power ground and increase, and also can be the increase of 2 even 3 power ground with tilted direction quantity.This mode more for a long time the situation (can not accomplish usually at present to touch more than 10 through this method at present) that also is unfavorable for counting.
Summary of the invention
The present invention provides a kind of multi-touch recognition method that is used for the infrared tube touch-screen based on bitmap, multipoint touching device and infrared tube touch-screen system, can reduce calculation resources consumption, save operation time.
The multi-touch recognition method that is used for the infrared tube touch-screen based on bitmap provided by the invention comprises step:
With each pixel of the touch area of touch-screen form record with bitmap;
In any a plurality of direction of scanning said touch-screen is scanned;
Each pixel of record is in the number of times in the be blocked zone or the zone that is not blocked in each direction of scanning in said bitmap;
The set of pixels that the number of times in the zone that is blocked equals scanning times be will be in and real touch area and touch point position will be identified as.
The multipoint touching device that is used for the infrared tube touch-screen based on bitmap provided by the invention comprises:
Memory storage is used for each pixel of the touch area of touch-screen is in each direction of scanning with the form record of bitmap and in said each pixel of bitmap record the number of times in the be blocked zone or the zone that is not blocked;
Control device is used to control infrared tube and in any a plurality of direction of scanning said touch-screen is scanned;
Recognition device is used for the set of pixels that the number of times that is in the zone that is blocked equals scanning times is identified as real touch area and touch point position.
Infrared tube touch-screen system provided by the invention comprises multipoint touching device and infrared tube;
Said multipoint touching device comprises:
Memory storage is used for each pixel of the touch area of touch-screen is in each direction of scanning with the form record of bitmap and in said each pixel of bitmap record the number of times in the be blocked zone or the zone that is not blocked;
Control device is used to control infrared tube and in any a plurality of direction of scanning said touch-screen is scanned;
Recognition device is used for the set of pixels that the number of times that is in the zone that is blocked equals scanning times is identified as real touch area and touch point position;
Said infrared tube, the control that is used to accept said control device scans.
The present invention utilizes over against the data of non-scanning over against infrared device, through bitmap handle, the mode of image recognition realizes multiple spot identification.Only consume lower calculation resources and time simultaneously, and can adapt to many arbitrarily counting and many arbitrarily tilted directions, can identify a plurality of touch point of theory unlimited exactly.
Description of drawings
Fig. 1 is the process flow diagram of embodiment 1;
Fig. 2 is the bitmap synoptic diagram of touch area among the embodiment 2;
Fig. 3 is to be the synoptic diagram of six direction of scanning to Fig. 8;
Fig. 9 is the logic diagram of embodiment 4.
Embodiment
Embodiment 1: present embodiment provides the multi-touch recognition method that is used for the infrared tube touch-screen based on bitmap, and is as shown in Figure 1:
In advance with each pixel of the touch area of touch-screen form record (step 1) with bitmap; In any a plurality of direction of scanning touch-screen is scanned (step 2); Each pixel of record is in the number of times (step 3) in the be blocked zone or the zone that is not blocked in each direction of scanning in bitmap; The set of pixels that the number of times in the zone that is blocked equals scanning times be will be in and real touch area and touch point position (step 4) will be identified as.
The mode that in bitmap, writes down each pixel number of times in zone of living in each scanning for step 3 has a variety of, in following embodiment, enumerates wherein several kinds, can certainly realize through other mode, does not hinder effect of the present invention.
Embodiment 2: the touch area of touch-screen showed with bitmap form, i.e. and capable matrix of X row Y, each pixel all is provided with a token variable a [x] [y] (x is its row of living in number, and y is its row of living in number) in the bitmap, and the variable initial value is 0.As shown in Figure 2, X=30 in the present embodiment, Y=20.
Touch-screen starts, and carries out the scanning of all directions successively, and is extremely shown in Figure 8 like Fig. 3.6 direction of scanning are arranged here.
When having the touch point; The light thing that is touched blocks, and according to the zone that is blocked, as follows each pixel is recorded on the said bitmap of step 1: as far as each pixel in the bitmap; Whenever in 1 direction of scanning, be in the zone that is blocked, then its indexed variable adds 1 (being that a [x] [y] adds 1).
After accomplishing the scanning of all directions, the superposition that obtains marking variable is that 0 pixel is the region, touch point, and the situation when previous example is single-point also in like manner, is not described further during for multiple spot.
Embodiment 3: in the present embodiment, according to above-mentioned occlusion area, be recorded in as follows on the said bitmap of step 1: as far as each pixel in the bitmap, whenever in 1 direction of scanning, be in the zone that is blocked, then its indexed variable adds 1 (being that a [x] [y] adds 1).After accomplishing the scanning of all directions, the pixel that the superposition that obtains marking variable equals total scanning times is the region, touch point, and the situation when previous example is single-point also in like manner, is not described further during for multiple spot.
Embodiment 4: corresponding with above-mentioned each embodiment, the present invention also provides corresponding multipoint touching device, and is as shown in Figure 9, comprising: memory storage, control device and recognition device.
Memory storage with each pixel of the touch area of touch-screen with the form record of bitmap and in bitmap each pixel of record be in the number of times in the be blocked zone or the zone that is not blocked in each direction of scanning; Control device control infrared tube scans said touch-screen in any a plurality of direction of scanning; Recognition device will be in the set of pixels that the number of times in the zone that is blocked equals scanning times and be identified as real touch area and touch point position.
Embodiment 5: the infrared tube touch-screen system is provided in the present embodiment, has comprised multipoint touching device and the infrared tube of embodiment 4, the scanning of each direction of scanning is carried out in the control of infrared tube receiving control device.
Above-described embodiment of the present invention does not constitute the qualification to protection domain of the present invention.Any modification of within spirit of the present invention and principle, being done, be equal to replacement and improvement etc., all should be included within the claim protection domain of the present invention.
Claims (7)
1. the multi-touch recognition method that is used for the infrared tube touch-screen based on bitmap is characterized in that, comprises step:
With each pixel of the touch area of touch-screen form record with bitmap;
In any a plurality of direction of scanning said touch-screen is scanned;
Each pixel of record is in the number of times in the be blocked zone or the zone that is not blocked in each direction of scanning in said bitmap;
The set of pixels that the number of times in the zone that is blocked equals scanning times be will be in and real touch area and touch point position will be identified as.
2. multi-touch recognition method according to claim 1 is characterized in that, be blocked in each direction of scanning step of number of times of each pixel of record comprises in said bitmap:
In each said direction of scanning, if the pixel in the said bitmap is in the zone that is blocked, then the indexed variable with this pixel adds 1, writes down the superposition on each direction of scanning.
3. multi-touch recognition method according to claim 1 is characterized in that, the step of the number of times of the non-occluded area of each direction of scanning of record comprises in said bitmap:
In each said direction of scanning, if the pixel in the said bitmap is in non-occluded area, then the indexed variable with this pixel adds 1, writes down the superposition on each direction of scanning.
4. the multipoint touching device that is used for the infrared tube touch-screen based on bitmap is characterized in that, comprising:
Memory storage is used for each pixel of the touch area of touch-screen is in each direction of scanning with the form record of bitmap and in said each pixel of bitmap record the number of times in the be blocked zone or the zone that is not blocked;
Control device is used to control infrared tube and in any a plurality of direction of scanning said touch-screen is scanned;
Recognition device is used for the set of pixels that the number of times that is in the zone that is blocked equals scanning times is identified as real touch area and touch point position.
5. multipoint touching device according to claim 4; It is characterized in that, in each said direction of scanning, if the pixel in the said bitmap is in the zone that is blocked; Then said recognition device adds 1 with the indexed variable of this pixel, writes down the superposition on each direction of scanning.
6. multipoint touching device according to claim 4; It is characterized in that, in each said direction of scanning, if the pixel in the said bitmap is in non-occluded area; Then said recognition device adds 1 with the indexed variable of this pixel, writes down the superposition on each direction of scanning.
7. use the infrared tube touch-screen system of the multipoint touching device of claim 4 to 6, it is characterized in that, comprised multipoint touching device and infrared tube;
Said multipoint touching device comprises:
Memory storage is used for each pixel of the touch area of touch-screen is in each direction of scanning with the form record of bitmap and in said each pixel of bitmap record the number of times in the be blocked zone or the zone that is not blocked;
Control device is used to control infrared tube and in any a plurality of direction of scanning said touch-screen is scanned;
Recognition device is used for the set of pixels that the number of times that is in the zone that is blocked equals scanning times is identified as real touch area and touch point position;
Said infrared tube, the control that is used to accept said control device scans.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110380441.5A CN102495695B (en) | 2011-11-25 | 2011-11-25 | Multipoint touch identification method of infrared diode touch screen as well as touch device and system |
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| CN201110380441.5A CN102495695B (en) | 2011-11-25 | 2011-11-25 | Multipoint touch identification method of infrared diode touch screen as well as touch device and system |
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| CN102495695B CN102495695B (en) | 2014-12-31 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103699273A (en) * | 2013-12-26 | 2014-04-02 | 广州视睿电子科技有限公司 | Infrared touch screen touch point identification method and system |
| CN104102389A (en) * | 2013-04-02 | 2014-10-15 | 北京汇冠新技术股份有限公司 | Scanning line shifting line-drawing method and system |
| CN104598082A (en) * | 2015-01-23 | 2015-05-06 | 青岛海信电器股份有限公司 | Method and device for determining candidate touch point |
| CN113126795A (en) * | 2019-12-31 | 2021-07-16 | 青岛海信商用显示股份有限公司 | Touch identification method of touch display device and related equipment |
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| CN101075168A (en) * | 2007-06-22 | 2007-11-21 | 北京汇冠新技术有限公司 | Method for discriminating multiple points on infrared touch screen |
| CN101149656A (en) * | 2007-10-26 | 2008-03-26 | 广东威创视讯科技股份有限公司 | Infra red touch screen and multiple point touching positioning method |
| CN101320307A (en) * | 2007-06-04 | 2008-12-10 | 北京汇冠新技术有限公司 | Method for recognizing multiple touch points on infrared touch screen |
| US20100277436A1 (en) * | 2009-04-29 | 2010-11-04 | Hong Kong Applied Science And Technology Research Institute Co., Ltd. | Sensing System for a Touch Sensitive Device |
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| CN101320307A (en) * | 2007-06-04 | 2008-12-10 | 北京汇冠新技术有限公司 | Method for recognizing multiple touch points on infrared touch screen |
| CN101075168A (en) * | 2007-06-22 | 2007-11-21 | 北京汇冠新技术有限公司 | Method for discriminating multiple points on infrared touch screen |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104102389A (en) * | 2013-04-02 | 2014-10-15 | 北京汇冠新技术股份有限公司 | Scanning line shifting line-drawing method and system |
| CN103699273A (en) * | 2013-12-26 | 2014-04-02 | 广州视睿电子科技有限公司 | Infrared touch screen touch point identification method and system |
| CN103699273B (en) * | 2013-12-26 | 2016-09-21 | 广州视睿电子科技有限公司 | The touch point recognition methods of infrared touch panel and system thereof |
| CN104598082A (en) * | 2015-01-23 | 2015-05-06 | 青岛海信电器股份有限公司 | Method and device for determining candidate touch point |
| CN104598082B (en) * | 2015-01-23 | 2017-09-22 | 青岛海信电器股份有限公司 | A kind of method and device for determining candidate touch point |
| CN113126795A (en) * | 2019-12-31 | 2021-07-16 | 青岛海信商用显示股份有限公司 | Touch identification method of touch display device and related equipment |
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| CN102495695B (en) | 2014-12-31 |
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