CN102419663B - A kind of infrared touch screen multi-point recognition method and system - Google Patents

A kind of infrared touch screen multi-point recognition method and system Download PDF

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Publication number
CN102419663B
CN102419663B CN201110221822.9A CN201110221822A CN102419663B CN 102419663 B CN102419663 B CN 102419663B CN 201110221822 A CN201110221822 A CN 201110221822A CN 102419663 B CN102419663 B CN 102419663B
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China
Prior art keywords
light path
point
cluster
impact point
area
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CN102419663A (en
Inventor
李振宇
王武军
叶新林
刘建军
刘新斌
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Beijing Irtouch Systems Co Ltd
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Beijing Unitop New Technology Co Ltd
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Priority to CN201110221822.9A priority Critical patent/CN102419663B/en
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Priority to PCT/CN2012/077831 priority patent/WO2013016996A1/en
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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
    • 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
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04104—Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)
  • Image Analysis (AREA)

Abstract

The invention provides a kind of multi-point recognizing method and system of infrared touch panel.First the present invention gathers light path data; Secondly, the image/data structure becoming preset ratio with described infrared touch screen dimensions is generated; Again, the attribute that pixel/data element is associated with the light path on infrared touch panel is set up; Then, the attribute be associated with the light path on infrared touch panel according to pixel/data element and described light path data extract touch point information.The present invention is by light path data, change the quantity of the light path be associated with image pixel/data element, when the light path quantity vanishing be associated with some image pixel/data elements, this image pixel/data element is labeled as impact point, then according to the density of impact point of mark, by impact point cluster, gather for of a sort impact point is a touch point, judge impact point from the order of magnitude of image pixel or data element, effectively can remove ghost point and noise spot, accuracy of identification is high.

Description

A kind of infrared touch screen multi-point recognition method and system
Technical field
The present invention relates to a kind of infrared touch screen multi-point recognition method and system, particularly relate to a kind of infrared multi-point recognizing method and system of density based cluster.
Background technology
Along with the development of touching technique, touch-screen as one simply and easily human-computer interaction device be used widely.At present, the kind of touch-screen mainly comprises resistive touch screen, capacitive touch screen, surface acoustic wave touch screen, optical touch screen and infrared touch panel etc.Wherein, infrared touch panel utilizes the infrared ray matrix that X, Y-direction are gathered to detect and the touch operation of consumer positioning.Infrared touch panel installs a circuit board housing before display, and circuit board is at screen four limit arrangement infrared transmitting tube and infrared receiving tube, and one_to_one corresponding forms the infrared ray matrix anyhow intersected.User is when touch screen, and the touch objects such as finger can block two infrared rays anyhow through this position, thus can judge the position of touch point on screen.Because infrared touch panel has not by electric current, voltage and electrostatic interference, the advantages such as suitable rugged environment condition, therefore the range of application of infrared touch panel is wider.
On infrared touch panel, the recognition methods of touch point experienced by from identification a bit to identification two point, then to identifying the development course of more points.Multiple spot (more than 2 points) identifies the development trend that will inevitably become infrared touch panel, because multiple point touching not only can demonstrate more dazzle beautiful display effect, and can realize more touch function.
2 recognition methodss of infrared touch panel are mature on the whole at present, and the committed step in identifying removes terrible point, and described ghost point refers to the non-genuine touch point identified on infrared touch panel.Remove ghost point and can adopt logic judging method, such as, according to two (or more) in logic screen, each corresponding accurate distance relation touched between point set, the directly real touch point of screening.Its theoretical foundation is: the scanning result middle distance deviation that true point shields in each logic is little, and ghost point deviation is larger.The terrible point methods of this removal is simple and easy to realize, and calculated amount is little, goes terrible some ability strong.But, when touch point is more than 2, the corresponding relation of the upper specific touch point of Different Logic screen is not easily determined, because when Different Logic screen is counted identical, easy sequence, but count difference time, the upper point of as a certain in edge logic screen is lost, then more difficult sequence alignment, and judgement automatically of counting is more difficult.When counting increase, owing to sorting unsuccessful, wrong identification occurrence probability that is that cause also increases sharply.Therefore, this method is not suitable for the multiple spot identification more than 2 on infrared touch panel.
There is part producer to be proposed to have the infrared touch panel of multiple spot (10 point) recognition function in the market, but in effect, there is many drawbacks.Such as, ghost point is many, precision is low, and requires that the area of touch objects is larger.
Summary of the invention
For the defect existed in prior art, technical matters to be solved by this invention is to provide one can put forward high-precision infrared touch screen multi-point recognition method and system.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows:
A kind of infrared touch screen multi-point recognition method, comprises the following steps:
Be captured in the light path data in an identifying;
Generate the image becoming preset ratio with described infrared touch screen dimensions;
The attribute that the pixel setting up described image is associated with the light path on described infrared touch panel;
The attribute be associated with described light path according to described pixel and described light path data extract touch point information.
Infrared touch screen multi-point recognition method as above, the attribute that the described pixel setting up described image is associated with described light path is specially:
The light path through each pixel is determined according to the trend of described preset ratio and described light path;
The position of the quantity of record through the light path of each pixel and the light path through this pixel or sequence number.
Infrared touch screen multi-point recognition method as above, the concrete steps of described extraction touch point information can be:
According to the attribute be associated between described pixel with described light path and described light path data search impact point;
Setting density threshold, travels through each impact point successively, carries out cluster according to cluster condition to impact point, obtain at least one cluster set;
Calculate the area that the centre coordinate of each cluster set internal object point and impact point cover, using the coordinate of described centre coordinate as touch point, the area that described impact point covers is as the area of touch point.
Infrared touch screen multi-point recognition method as above, the concrete steps of described extraction touch point information also can be:
According to the attribute be associated between described pixel with described light path and described light path data search impact point;
Setting density threshold, travels through each impact point successively, carries out cluster according to cluster condition to impact point, obtain at least one cluster set;
Setting area threshold, judges whether the area that each cluster set covers is greater than described area threshold, if be greater than successively, be then a touch point by this cluster set cooperation, otherwise, give up this cluster set, judge next cluster set, until judged that all cluster sets are only combined into;
The area that the centre coordinate of each cluster set internal object point that calculating is not rejected and impact point cover, using the coordinate of described centre coordinate as touch point, the area that described impact point covers is as the area of touch point.
Infrared touch screen multi-point recognition method as above, described in search impact point method can be:
1. the pixel that traversal one is not traversed;
2. not traversed light path through current pixel is traveled through;
3. judge whether current light path is blocked, the quantity of the light path be if so, then associated with current pixel subtracts 1, and enters step 4.; Otherwise, directly enter step 4.;
4. judge whether to have traveled through all light paths through current pixel, if so, then enter step 5.; Otherwise, go to step 2.;
5. judge whether the quantity of the light path be associated with current pixel becomes 0, if so, then this pixel is labeled as an impact point, enters step 6.; Otherwise, directly enter step 6.;
6. judge whether all pixels are disposed, and if so, then terminate; Otherwise, go to step 1..
Infrared touch screen multi-point recognition method as above, described in search impact point method also can be:
1. according to described light path data, travel through the light path that each is blocked, by with each light path be blocked the light path quantity that is associated of the pixel of process subtract 1;
2. again travel through a pixel of the light path process be blocked, judge whether the quantity of the light path through this pixel becomes 0, if so, then this pixel is labeled as an impact point, enters step 3.; Otherwise, directly enter step 3.;
3. judge whether all pixels processing the light path process be blocked, if so, then terminate, otherwise, then go to step 2..
Infrared touch screen multi-point recognition method as above, it is described that to carry out the method for cluster to impact point as follows:
1. the impact point that traversal one is not traversed;
2. judge whether the impact point density in current goal neighborhood of a point is greater than the density threshold of setting, if so, then using this impact point as an element in a cluster set, enter step 3.; Otherwise give up this impact point, this cluster set is complete, enters step 3.;
3. judge whether impact point travels through complete, if so, then terminate; Otherwise, go to step 1..
Infrared touch screen multi-point recognition method as above, described method also comprises
The step of moving touch point is followed the tracks of according to the distance between the position of the touch point of previous moment and the position of current time touch point.
A kind of infrared touch screen multi-point recognition method, comprises the following steps:
Be captured in the light path data in an identifying;
Generate the data structure with two-dimensional matrix alignment properties becoming preset ratio with described infrared touch screen dimensions;
The attribute that the data element setting up described data structure is associated with the light path on described infrared touch panel;
The attribute be associated with described light path according to described data element and described light path data extract touch point information.
Infrared touch screen multi-point recognition method as above, described data structure is two-dimensional array, and described data element is array element.
Infrared touch screen multi-point recognition method as above, describedly set up the attribute that described data element is associated with described light path and be specially:
The light path through each data element is determined according to the trend of described preset ratio and described light path;
The position of the quantity of record through the light path of each data element and the light path through this data element or sequence number.
Infrared touch screen multi-point recognition method as above, the concrete steps of described extraction touch point information can be:
According to the attribute be associated between described data element with described light path and described light path data search impact point;
Setting density threshold, travels through each impact point successively, carries out cluster according to cluster condition to impact point, obtain at least one cluster set;
Calculate the area that the centre coordinate of each cluster set internal object point and impact point cover, using the coordinate of described centre coordinate as touch point, the area that described impact point covers is as the area of touch point.
Infrared touch screen multi-point recognition method as above, the concrete steps of described extraction touch point information also can be:
According to the attribute be associated between described data element with described light path and described light path data search impact point;
Setting density threshold, travels through each impact point successively, carries out cluster according to cluster condition to impact point, obtain at least one cluster set;
Setting area threshold, judges whether the area that each cluster set covers is greater than described area threshold, if be greater than successively, be then a touch point by this cluster set cooperation, otherwise, give up this cluster set, judge next cluster set, until judged that all cluster sets are only combined into;
The area that the centre coordinate of each cluster set internal object point that calculating is not rejected and impact point cover, using the coordinate of described centre coordinate as touch point, the area that described impact point covers is as the area of touch point.
Infrared touch screen multi-point recognition method as above, described in search impact point method can be:
1. the data element that traversal one is not traversed;
2. not traversed light path through current data element is traveled through;
3. judge whether current light path is blocked, the quantity of the light path be if so, then associated with current data element subtracts 1, and enters step 4.; Otherwise, directly enter step 4.;
4. judge whether to have traveled through all light paths through current data element, if so, then enter step 5.; Otherwise, go to step 2.;
5. judge whether the quantity of the light path be associated with current data element becomes 0, if so, then this data element is labeled as an impact point, enters step 6.; Otherwise, directly enter step 6.;
6. judge whether all data elements are disposed, and if so, then terminate; Otherwise, go to step 1..
Infrared touch screen multi-point recognition method as above, described in search impact point method also can be:
1. according to described light path data, travel through the light path that each is blocked, by with each light path be blocked the light path quantity that is associated of the data element of process subtract 1;
2. again travel through a data element of the light path process be blocked, judge whether the quantity of the light path through this data element becomes 0, if so, then this data element is labeled as an impact point, enters step 3.; Otherwise, directly enter step 3.;
3. judge whether all data elements processing the light path process be blocked, if so, then terminate, otherwise, then go to step 2..
Infrared touch screen multi-point recognition method as above, it is described that to carry out the method for cluster to impact point as follows:
1. the impact point that traversal one is not traversed;
2. judge whether the impact point density in current goal neighborhood of a point is greater than the density threshold of setting, if so, then using this impact point as an element in a cluster set, enter step 3.; Otherwise give up this impact point, this cluster set is complete, enters step 3.;
3. judge whether impact point travels through complete, if so, then terminate; Otherwise, go to step 1..
Infrared touch screen multi-point recognition method as above, described method also comprises
The step of moving touch point is followed the tracks of according to the distance between the position of the touch point of previous moment and the position of current time touch point.
A multiple spot recognition system for infrared touch panel, comprising:
For being captured in the data collector of the light path data in an identifying;
For generating the video generation device becoming the image of preset ratio with described infrared touch screen dimensions;
For the attribute apparatus for establishing of the attribute that the pixel setting up described image is associated with the light path on described infrared touch panel;
The touch point information extracting device of touch point information is extracted for the attribute that is associated with described light path according to described pixel and described light path data.
Infrared touch panel multiple spot recognition system as above, described attribute apparatus for establishing comprises:
For determining the light path determining unit of the light path through each pixel according to the trend of described preset ratio and described light path;
For recording position or the sequence number attribute record unit of the quantity through the light path of each pixel and the light path through this pixel.
Infrared touch panel multiple spot recognition system as above, described touch point information extracting device comprises:
For searching unit according to the impact point of the attribute be associated between described pixel with described light path and described light path data search impact point;
For carrying out the cluster cell of cluster to impact point according to cluster condition, described cluster cell setting density threshold, travels through each impact point successively, carries out cluster according to cluster condition to impact point, obtain at least one cluster set;
For the touch point computing unit of the area of the coordinate and touch point that calculate touch point, described touch point computing unit calculates the area that the centre coordinate of each cluster set internal object point and impact point cover, using the coordinate of described centre coordinate as touch point, the area that described impact point covers is as the area of touch point.
Infrared touch panel multiple spot recognition system as above, described touch point information extracting device comprises:
For searching unit according to the impact point of the attribute be associated between described pixel with described light path and described light path data search impact point;
For carrying out the cluster cell of cluster to impact point according to cluster condition;
For judging whether area that each cluster set covers is greater than the area judging unit of described area threshold successively, described area judging unit setting area threshold, judge whether area that each cluster set covers is greater than the area judging unit of described area threshold successively, if be greater than, be then a touch point by this cluster set cooperation, otherwise, give up this cluster set, judge next cluster set, until judged that all cluster sets are only combined into;
For the touch point computing unit of the area of the coordinate and touch point that calculate touch point, described touch point computing unit calculates the area that the centre coordinate of each cluster set internal object point be not rejected and impact point cover, using the coordinate of described centre coordinate as touch point, the area that described impact point covers is as the area of touch point.
Infrared touch panel multiple spot recognition system as above, described system also comprises follows the tracks of according to for the distance between the position of the touch point according to previous moment and the position of current time touch point the motion tracer moved touch point.
A multiple spot recognition system for infrared touch panel, comprises
For being captured in the data collector of the light path data in an identifying;
For generating the data structure building device with the data structure of two-dimensional matrix alignment properties becoming preset ratio with described infrared touch screen dimensions;
For the attribute apparatus for establishing of the attribute that the data element setting up described data structure is associated with the light path on described infrared touch panel;
The touch point information extracting device of touch point information is extracted for the attribute that is associated with described light path according to described data element and described light path data.
Infrared touch panel multiple spot recognition system as above, described attribute apparatus for establishing comprises:
For determining the light path determining unit of the light path through each data element according to the trend of described preset ratio and described light path;
For recording position or the sequence number attribute record unit of the quantity through the light path of each data element and the light path through this data element.
Infrared touch panel multiple spot recognition system as above, described touch point information extracting device comprises:
For searching unit according to the impact point of the attribute be associated between described data element with described light path and described light path data search impact point;
For carrying out the cluster cell of cluster to impact point according to cluster condition, described cluster cell setting density threshold, travels through each impact point successively, carries out cluster according to cluster condition to impact point, obtain at least one cluster set;
For the touch point computing unit of the area of the coordinate and touch point that calculate touch point, described touch point computing unit calculates the area that the centre coordinate of each cluster set internal object point and impact point cover, using the coordinate of described centre coordinate as touch point, the area that described impact point covers is as the area of touch point.
Infrared touch panel multiple spot recognition system as above, described touch point information extracting device comprises:
For searching unit according to the impact point of the attribute be associated between described data element with described light path and described light path data search impact point;
For carrying out the cluster cell of cluster to impact point according to cluster condition;
For judging whether area that each cluster set covers is greater than the area judging unit of described area threshold successively, described area judging unit setting area threshold, judge whether area that each cluster set covers is greater than the area judging unit of described area threshold successively, if be greater than, be then a touch point by this cluster set cooperation, otherwise, give up this cluster set, judge next cluster set, until judged that all cluster sets are only combined into;
For the touch point computing unit of the area of the coordinate and touch point that calculate touch point, described touch point computing unit calculates the area that the centre coordinate of each cluster set internal object point be not rejected and impact point cover, using the coordinate of described centre coordinate as touch point, the area that described impact point covers is as the area of touch point.
Infrared touch panel multiple spot recognition system as above, described system also comprises follows the tracks of for the distance between the position of the touch point according to previous moment and the position of current time touch point the motion tracer moved touch point.
The invention provides a kind of infrared touch screen multi-point recognition method and system of density based cluster, by setting up the data element of pixel/data structure of image and associating between light path, by light path data, change the quantity of the light path be associated with the data element of the pixel/data structure of image, when the light path quantity vanishing that the data element of the pixel/data structure with some images is associated, the data element of the pixel/data structure of this image is labeled as impact point, in the density of the impact point according to mark, setting density threshold, by impact point cluster, gather is that the impact point of a class is a touch point, background is set to by there is no the impact point of cluster, this order of magnitude from image pixel or array element judges impact point, effectively can remove ghost point and noise spot, accuracy of identification is high, be suitable for the identification of any number of touch point.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the multiple spot recognition system of infrared touch panel in embodiment 1;
Fig. 2 is the process flow diagram of the multi-point recognizing method of infrared touch panel in embodiment 1;
Fig. 3 is the process flow diagram of the method for the attribute that pixel that in embodiment 1, attribute apparatus for establishing sets up image is associated with the light path on described infrared touch panel;
Fig. 4 is a pixel and a kind of mode of passing through the attribute be associated between the light path of this pixel in embodiment 1;
Fig. 5 is the process flow diagram that in embodiment 1, touch point information extracting device extracts the method for touch point information;
Fig. 6 is that in embodiment 1, impact point searches the process flow diagram that unit searches the method for impact point;
Fig. 7 is the schematic diagram that in embodiment 1, impact point searches the distribution situation of impact point on image that unit finds out;
Fig. 8 is the process flow diagram that in embodiment 1, cluster cell carries out the method for cluster to impact point;
Fig. 9 is that in embodiment 2, impact point searches the process flow diagram that unit searches the method for impact point;
Figure 10 is the structured flowchart of touch point information extracting device in embodiment 3;
Figure 11 is the process flow diagram that in embodiment 3, touch point information extracting device extracts the method for touch point information;
Figure 12 is the structured flowchart of the multiple spot recognition system of infrared touch panel in embodiment 4.
Embodiment
Carry out clearly intactly describing to the present invention below in conjunction with embodiment and accompanying drawing.
Embodiment 1
The present embodiment provides a kind of multiple spot recognition system and multi-point recognizing method of infrared touch panel, as shown in Figure 1, this multiple spot recognition system comprises data collector 1, video generation device 2, attribute apparatus for establishing 3, touch point information extracting device 4 and motion tracer 5, and wherein attribute apparatus for establishing 3 comprises light path determining unit 31 and attribute record unit 32; Touch point information extracting device 4 comprises impact point and searches unit 41, cluster cell 42, touch point computing unit 44.
Data collector 1 is for being captured in the light path data in an identifying.
Video generation device 2 becomes the image of preset ratio with described infrared touch screen dimensions for generating.
The attribute that attribute apparatus for establishing 3 is associated with the light path on described infrared touch panel for the pixel setting up described image.Wherein light path determining unit 31 is for determining the light path through each pixel according to the trend of described preset ratio and light path; Attribute record unit 32 is for recording position or the sequence number of the quantity through the light path of each pixel and the light path through this pixel.
Touch point information extracting device 4 extracts touch point information for the attribute that is associated with the light path on described infrared touch panel according to described pixel and described light path data.Wherein impact point searches unit 41 for according to the attribute be associated between pixel with light path and light path data search impact point; Cluster cell 42 is for carrying out cluster according to cluster condition to impact point, and described cluster cell setting density threshold, travels through each impact point successively, carry out cluster according to cluster condition to impact point, obtain at least one cluster set; Touch point computing unit 44 is for calculating the coordinate of touch point and the area of touch point using each cluster set as a touch point; Touch point computing unit 44 can calculate the area that the centre coordinate of each cluster set internal object point and impact point cover, and using the coordinate of centre coordinate as touch point, the area that impact point covers is as the area of touch point.
Motion tracer 5 is followed the tracks of touch point for the distance between the position of the touch point according to previous moment and the position of current time touch point and is moved.
As shown in Figure 2, be the process flow diagram of the method for the multiple touch point of the system identification described in the present embodiment, the method comprises the following steps:
201, data collector 1 is captured in the light path data in an identifying.
This light path packet blocks and the light path of not blocking containing between the infrared emission component collected after overscanning and infrared receiver component, can represent with 1 as blocked data, the data be not blocked can represent with 0, and so these light path data are exactly a series of combinations of " 0 " and " 1 ".
202, video generation device 2 generates the image becoming preset ratio with described infrared touch screen dimensions, also a width and the proportional image of infrared touch screen dimensions is namely generated, the ratio of image size and infrared touch panel is preferably 1: 1, this image can be a width background is the image of solid color, and preferably the background color of image is black.
203, the attribute that is associated with the light path on described infrared touch panel for the pixel set up on described image of attribute apparatus for establishing 3.
Namely record each pixel, and the light path through current pixel got off as the attribute record of this pixel, pixel be associated with light path, a pixel can corresponding many light paths.As Fig. 3, the method specifically setting up the attribute that pixel is associated with light path comprises the steps:
2031, light path determining unit 31 determines through each pixel according to the trend of preset ratio and light path light path.
Light path through each pixel determines according to the trend of light path, it might not be the actual light path through this pixel, because some light path may can not pass this pixel due to blocking of touch objects, as long as light path move towards through this pixel, so described light path should comprise all light paths scanned between infrared emission component and infrared receiver component, both comprise the light path that the thing that is touched blocks, also comprise the light path that the thing that is not touched blocks.
2032, attribute record unit 32 records position or the sequence number of the quantity through the light path of each pixel and the light path through this pixel.
Equally, light path through each pixel comprises light path that is that be blocked and that be not blocked, the association between pixel and light path is set up through the quantity of light path of each pixel and the position of light path or sequence number by record, such as, for pixel (50,50), if have 3 light paths through this pixel, the sequence number of these 3 articles of light paths is respectively: the 8th article, the 10th article, the 12nd article, so the attribute of this pixel can be designated as the form shown in Fig. 4, can certainly be designated as other forms.
204, the attribute that is associated with the light path on described infrared touch panel according to the pixel on described image of touch point extraction element and described light path data extract touch point information.
As shown in Figure 5, the method extracting touch point information can comprise the following steps:
2041, impact point searches unit 41 according to the attribute be associated between described pixel with described light path and described light path data search impact point.
This impact point searches the circumstance of occlusion of unit 41 according to the light path data in an identifying, change pixel and the attribute be associated between light path, preferably, change the quantity of the light path be associated with pixel, when the quantity of the light path be associated with pixel meets certain condition, this pixel is labeled as impact point.
As Fig. 6, search impact point and specifically can adopt with the following method:
1. the pixel that traversal one is not traversed, is actually, and processes each pixel on image successively;
2. not traversed light path through current pixel is traveled through.
If be not traversed through the Article 1 light path of current pixel, then travel through Article 1 light path, otherwise traversal Article 2, if Article 2 was also traversed, then traveled through Article 3, the like.
3. judge whether current light path is blocked, if, the quantity of the light path be then associated with current pixel subtracts 1, and enter step 4., such as, the light path be associated with current pixel is 5, is blocked if fruit works as last bar light path, so the light path number be associated with current pixel is subtracted 1, the light path be also namely associated with current pixel becomes 4; Otherwise, directly enter step 4., if be also that current light path is not blocked, then do not process, directly enter next step.
4. judge whether to have traveled through all light paths through current pixel, if so, then enter step 5.; Otherwise, go to step 2..
That is, if the circumstance of occlusion through all light paths of a pixel all judges complete, then next step is entered, otherwise, judge next pixel after the same method.
5. judge whether the quantity of the light path be associated with current pixel becomes 0, if, then this pixel is labeled as an impact point, for the ease of distinguishing background color and impact point, can be the color different from the background color of image by the color mark of impact point, such as can be labeled as white, enter step 6.; Otherwise, directly enter step 6..
6. judge whether all pixels are disposed, and if so, then terminate; Otherwise, go to step 1..
In order to be illustrated more clearly in above-mentioned method of searching impact point, can describe more specifically said method:
Travel through first pixel, travel through the light path be associated with this pixel successively, also the light path of this pixel is namely traversed through, the light path number be such as associated with this pixel is 3, judge whether Article 1 light path is blocked, if be blocked, then the light path number be associated with this pixel subtracts 1, and the light path number be namely associated with this pixel becomes 2; Continue to judge whether Article 2 light path is blocked, if be blocked, then the light path number be associated with this pixel subtracts 1 again, and the light path number be namely associated with this pixel becomes 1; Continue to judge whether Article 3 light path is blocked, if be blocked, then the light path number be associated with this pixel subtracts 1 again, namely the light path number be associated with this pixel becomes 0, at this moment, this pixel is labeled as an impact point, can white be labeled as, then process next pixel.
If after 3 light paths that this pixel is associated judge, the light path number be associated with this pixel is not 0, then uses the same method and continue process second pixel, the 3rd pixel ..., the like, until process all pixels.
Because touch objects has certain area, a touch objects may cover multiple pixel, therefore, the impact point of mark is all gathered in several different region substantially, due to the existence of noise, also can distribute again on image by some isolated impact point, as shown in Figure 7, show the schematic diagram of the distribution situation of impact point on image found out, in figure, the point of white is impact point, as can be seen from the figure, except the impact point that minority is isolated, the impact point found out is gathered in different zonules respectively.It should be noted that Fig. 6 is schematic diagram, the distribution situation of actual impact point may be different.
2042, cluster cell 42 carries out cluster according to cluster condition to impact point, thus obtain at least one cluster set, whether this cluster condition density be preferably in target neighborhood of a point is greater than the threshold value of setting, also namely a density threshold is set, carry out cluster by the impact point density in target neighborhood of a point with comparing of density threshold, obtain at least one cluster set.
As Fig. 8, concrete clustering method is as follows:
1. travel through not traversed impact point, if also namely first time traversal be first aim point, so second time traversal other impact points except the impact point of first time traversal, the impact point at every turn traveled through does not repeat.
2. judge whether the impact point density in the target neighborhood of a point of current traversal is greater than the density threshold preset, if so, then using this impact point as an element in a cluster set, enter step 3.; Otherwise give up this impact point, this cluster set is complete, enters step 3..
3. judge whether impact point travels through complete, if so, then terminate; Otherwise, go to step 1..
Above-mentioned target neighborhood of a point is not specifically limited, can determine according to actual conditions, can be 4 neighborhoods of current goal point, 8 neighborhoods, 16 neighborhoods etc., also can be the circle that is the center of circle with this impact point, radius can be 2 or 3 pixels, can also be the square centered by this impact point or rectangle, its length of side be also determined according to actual needs.
Cluster set described above is complete refers to that this cluster set is built jointly vertical complete, also namely no longer in this cluster set, new element is added, if the impact point density met in addition in later step in neighborhood is greater than the impact point of the density threshold of setting, then this impact point is put into another cluster set.
In order to the clustering method of clearer explanation the present embodiment, do below and describe more specifically:
First travel through first aim point, set a density threshold, judge whether this impact point meets cluster condition, if satisfied, then using this impact point as an element in first cluster set C1;
Continue to judge second target point, if this impact point also meets cluster condition, then using this impact point as the element of second in C1, then judge the 3rd, the 4th ..., the n-th impact point, n is positive integer, until traverse an impact point not meeting cluster set and close, then give up this impact point;
Continue the next impact point be not traversed of traversal, if do not meet cluster condition, then continue traversal, if traverse an impact point to meet cluster condition, then using this impact point as first element in second cluster set, continue traversal, set up second cluster set, when again traversing one and not meeting the impact point of cluster set conjunction, second cluster set terminates;
Continue traversal, search the element in the 3rd cluster set ..., until traveled through all impact points.
In fact, each cluster set is the set of at least one impact point meeting cluster condition continuously, the impact point not meeting cluster condition is the separation of two cluster set, such as, suppose that finds 50 impact points altogether, if first 10 all meet cluster condition, then these 10 impact points are the element in a cluster set, 11st, 12 impact points do not meet cluster condition, 13 to 25 impact point meets, then the 13 to 25 impact point is the element in second cluster set, 26th does not meet, 27th to the 50th impact point meets, then the 27th to the 50th impact point is the element in the 3rd cluster set.
It should be noted that, above-mentioned cluster set can only have one, and at this moment corresponding is that single-point touches, and only has a touch point.
2043, touch point computing unit 44 is using cluster set described in each as a touch point, and calculates the coordinate of touch point and the area of touch point.
Touch point computing unit 44 calculates the area that the centre coordinate of each cluster set internal object point and impact point cover, using the coordinate of the centre coordinate of each cluster set as each touch point, the area covered by impact point is as the area of touch point, and wherein centre coordinate can be the average coordinates of impact point in a cluster set.
205, motion tracer 5 is followed the tracks of touch point according to the distance between the position of the touch point of previous moment and the position of current time touch point and is moved.
If the distance between the position of the position of previous moment touch point and current time touch point is less than certain threshold value, then these two positions are same touch point not track in the same time, can follow the tracks of the motion of touch point by this method.
Suppose in double identifying, first time identifies 5 touch points, is respectively T 1, T 2, T 3, T 4, T 5, second time also identifies 5 touch points, is respectively T 1', T 2', T 3', T 4', T 5'.Calculate T respectively 1' with T 1, T 2, T 3, T 4, T 5between distance, will with T 1' nearest point and T 1' as two points on a movement locus, namely these 2 are on a movement locus, belong to same touch objects at not two diverse locations in the same time.Adopt and judge T in the same way 2', T 3', T 4', T 5'.
The present embodiment provides a kind of multiple spot recognition system of infrared touch panel, this system is by the method process pixel of Density Clustering and the attribute be associated between light path, impact point is identified from the order of magnitude of pixel, then identifying touch point by carrying out cluster to impact point, the precision of touch recognition can be improved.
Embodiment 2
In embodiment 1, in step 2041, impact point searches the method that unit 41 searches impact point is travel through each pixel successively, judge whether current pixel is impact point according to the circumstance of occlusion of the light path be associated with this pixel, in fact, the light path through touch point is all blocked, so in order to identify touch point fast, can only judge the pixel that the light path be blocked is passed through, other pixels do not need to judge, as Fig. 9, the method for specifically searching impact point is as follows:
1. according to described light path data, travel through the light path that each is blocked, by with each light path be blocked the light path quantity that is associated of the pixel of process subtract 1.
The light path that traversal Article 1 is blocked, if this light path is through m pixel, wherein m is positive integer, the quantity of the light path be associated with this m pixel is subtracted 1, according to such method, process all light paths of being blocked and these light paths be blocked the pixel of process, by these light paths the light path quantity of pixel of process subtract 1.
2. the pixel of the light path process be blocked again is traveled through, judge whether the quantity through the light path of current pixel becomes 0, if, then this pixel is labeled as an impact point, for the ease of distinguishing background color and impact point, by the color that the color mark of impact point is different from background color, such as, can be labeled as white, enter step 3.; Otherwise, directly enter step 3.;
After step process 1., with the light path be blocked the quantity of light path that is associated of the pixel of process change, then the traversal step 1. middle pixel processed, also namely travel through the light path be blocked the pixel of process, if the light path quantity be associated with current pixel becomes 0, also namely become 0 through the light path number of this pixel, then this pixel is labeled as impact point, then step is entered 3., otherwise, directly enter step 3..
In fact, if current pixel is impact point, then the light path through this pixel should all be blocked.
3. judge whether all pixels processing the light path process be blocked, if so, then terminate, otherwise, then go to step 2..
Embodiment 3
In embodiment 1 and embodiment 2, touch point information extracting device 4 is all by carrying out cluster to the impact point identified when extracting touch point information, obtain several cluster set, be a touch point by each cluster set cooperation, in actual application, even obtain a series of cluster set according to Density Clustering, these cluster set are also not necessarily touch point entirely, may blocking due to actual touch point, the cluster set that some area is less blocks generation due to actual touch point, in order to reduce the probability of erroneous judgement further, as shown in Figure 10, touch point information extracting device 4 can also comprise an area judging unit 43, for judging whether area that each cluster set covers is greater than the area threshold of setting successively, this area judging unit setting area threshold, judge whether area that each cluster set covers is greater than the area judging unit of described area threshold successively, if be greater than, be then a touch point by this cluster set cooperation, otherwise, give up this cluster set, judge next cluster set, until judged that all cluster sets are only combined into.
As Figure 11, correspondingly, the attribute that is associated with the light path on infrared touch panel according to the pixel on image of touch point information extracting device 4 and described light path data are extracted touch point information and are replaced with the following method:
2041 ', impact point searches unit 41 according to the attribute be associated between described pixel with the light path on described infrared touch panel and described light path data search impact point, and the lookup method of objectives point can be identical with embodiment 1.
2042 ', cluster cell 42 sets density threshold, travels through each impact point successively, carries out cluster according to cluster condition to impact point, obtains at least one cluster set, and the method for concrete cluster is identical with embodiment 1.
2043 ', area judging unit 43 sets an area threshold, judge whether area that each cluster set covers is greater than the area threshold of setting successively, if be greater than, be then a touch point by this cluster set cooperation, otherwise, give up this cluster set, judge next cluster set, until judged that all cluster sets are only combined into.
By setting an area threshold, the area cover the impact point in each cluster set and area threshold compare, if the area that in cluster set, impact point covers is less than the area threshold of setting, if the impact point also namely in cluster set meets cluster condition, but the area of this cluster set is very little, such cluster set can not as a touch point, and this may be mutually block due to true touch point the terrible point caused, should give up, terrible point can be reduced like this.
2044 ', touch point computing unit 44 calculates the area that the centre coordinate of each cluster set internal object point be not rejected and impact point cover, and using the coordinate of this centre coordinate as touch point, the area that this impact point covers is as the area of touch point.
Cluster set cooperation less for area coverage, by arranging the area threshold of a cluster set, is that ghost point is removed, further increases touch precision by the present embodiment.
Embodiment 4
The present embodiment is based on embodiment 1, in embodiment 1, infrared touch panel multiple spot recognition system performs when multiple spot knows method for distinguishing to be needed to generate the image proportional with infrared touch screen dimensions, then the pixel in image is operated, relate to the numerical evaluation to image pixel, to operations such as the convolution of image, these operations are general more time-consuming, as the further improvement to embodiment 1 and embodiment 2, the present embodiment provides another kind of infrared touch panel multiple spot recognition system, as shown in figure 12, this multiple spot recognition system comprises data collector 1 ', two-dimensional array generating apparatus 2 ', attribute apparatus for establishing 3 ', touch point information extracting device 4 ' and motion tracer 5 ', wherein attribute apparatus for establishing 3 ' comprises light path determining unit 31 ' and attribute record unit 32 ', touch point information extracting device 4 ' comprises impact point and searches unit 41 ', cluster cell 42 ', touch point computing unit 44 '.
Data collector 1 ' is for being captured in the light path data in an identifying.
Two-dimensional array generating apparatus 2 ' becomes the two-dimensional array of preset ratio with described infrared touch screen dimensions for generating.
The attribute that attribute apparatus for establishing 3 ' is associated with the light path on described infrared touch panel for the array element setting up described two-dimensional array.Wherein light path determining unit 31 ' is for determining the light path through each array element according to the trend of described preset ratio and light path; Attribute record unit 32 ' is for recording position or the sequence number of the quantity through the light path of each array element and the light path through this array element.
Touch point information extracting device 4 ' extracts touch point information for the attribute that is associated with the light path on described infrared touch panel according to described array element and described light path data.Wherein impact point searches unit 41 ' for according to the attribute be associated between described array element with the light path on described infrared touch panel and described light path data search impact point; Cluster cell 42 ' is for carrying out cluster according to cluster condition to impact point; Touch point computing unit 44 ' is for calculating the coordinate of touch point and the area of touch point using each cluster set as a touch point, touch point computing unit 44 ' calculates the area that the centre coordinate of each cluster set internal object point and impact point cover, using the coordinate of described centre coordinate as touch point, the area area that described impact point covers is as the area of touch point.
Motion tracer 5 ' is followed the tracks of touch point for the distance between the position of the touch point according to previous moment and the position of current time touch point and is moved.
The multiple spot recognition system that the present embodiment provides performs and identifies that the method for multiple touch point is identical with the method for embodiment 1, embodiment 2 or embodiment 3, just video generation device 2 is wherein replaced with two-dimensional array generating apparatus 2 ', all change all process to pixel into process to array element, also all replace with array element by the pixel unification in embodiment 1, embodiment 2 or embodiment 3, specifically comprise the following steps:
Data collector 1 ' is captured in the light path data in an identifying;
Two-dimensional array generating apparatus 2 ' generates the two-dimensional array becoming preset ratio with described infrared touch screen dimensions.
The attribute that attribute apparatus for establishing 3 ' is associated with the light path on described infrared touch panel for the array element setting up described two-dimensional array.
Touch point information extracting device 4 ' extracts touch point information for the attribute that is associated with the light path on described infrared touch panel according to described array element and described light path data.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention, and such as, the two-dimensional array in embodiment 4 also other can have the data structure of two-dimensional matrix alignment properties, as bivector.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technology thereof, then the present invention is also intended to comprise these change and modification.

Claims (27)

1. an infrared touch screen multi-point recognition method, is characterized in that, comprises the following steps:
Be captured in the light path data in an identifying;
This light path packet blocks and the light path of not blocking containing between the infrared emission component collected after overscanning and infrared receiver component;
Generate the image becoming preset ratio with described infrared touch screen dimensions;
The attribute that the pixel setting up described image is associated with the light path on described infrared touch panel;
The attribute be associated with described light path according to described pixel and described light path data extract touch point information;
The foundation of described attribute is adopted with the following method:
The light path through each pixel is determined according to the trend of described preset ratio and light path;
The position of the quantity of record through the light path of each pixel and the light path through this pixel or sequence number.
2. infrared touch screen multi-point recognition method according to claim 1, is characterized in that, the attribute that the described pixel setting up described image is associated with described light path is specially:
The light path through each pixel is determined according to the trend of described preset ratio and described light path;
The position of the quantity of record through the light path of each pixel and the light path through this pixel or sequence number.
3. infrared touch screen multi-point recognition method according to claim 1, is characterized in that, the concrete steps of described extraction touch point information are as follows:
According to the attribute be associated between described pixel with described light path and described light path data search impact point;
Setting density threshold, travels through each impact point successively, carries out cluster according to cluster condition to impact point, obtain at least one cluster set;
Calculate the area that the centre coordinate of each cluster set internal object point and impact point cover, using the coordinate of described centre coordinate as touch point, the area that described impact point covers is as the area of touch point.
4. infrared touch screen multi-point recognition method according to claim 1, is characterized in that, the concrete steps of described extraction touch point information are as follows:
According to the attribute be associated between described pixel with described light path and described light path data search impact point;
Setting density threshold, travels through each impact point successively, carries out cluster according to cluster condition to impact point, obtain at least one cluster set;
Setting area threshold, judges whether the area that each cluster set covers is greater than described area threshold, if be greater than successively, be then a touch point by this cluster set cooperation, otherwise, give up this cluster set, judge next cluster set, until judged that all cluster sets are only combined into;
The area that the centre coordinate of each cluster set internal object point that calculating is not rejected and impact point cover, using the coordinate of described centre coordinate as touch point, the area that described impact point covers is as the area of touch point.
5. the infrared touch screen multi-point recognition method according to claim 3 or 4, is characterized in that, described in search the method for impact point as follows:
1. the pixel that traversal one is not traversed;
2. not traversed light path through current pixel is traveled through;
3. judge whether current light path is blocked, the quantity of the light path be if so, then associated with current pixel subtracts 1, and enters step 4.; Otherwise, directly enter step 4.;
4. judge whether to have traveled through all light paths through current pixel, if so, then enter step 5.; Otherwise, go to step 2.;
5. judge whether the quantity of the light path be associated with current pixel becomes 0, if so, then this pixel is labeled as an impact point, enters step 6.; Otherwise, directly enter step 6.;
6. judge whether all pixels are disposed, and if so, then terminate; Otherwise, go to step 1..
6. the infrared touch screen multi-point recognition method according to claim 3 or 4, is characterized in that, described in search the method for impact point as follows:
1. according to described light path data, travel through the light path that each is blocked, by with each light path be blocked the light path quantity that is associated of the pixel of process subtract 1;
2. again travel through a pixel of the light path process be blocked, judge whether the quantity of the light path through this pixel becomes 0, if so, then this pixel is labeled as an impact point, enters step 3.; Otherwise, directly enter step 3.;
3. judge whether all pixels processing the light path process be blocked, if so, then terminate, otherwise, then go to step 2..
7. the infrared touch screen multi-point recognition method according to claim 3 or 4, is characterized in that, described to carry out the method for cluster to impact point as follows:
1. the impact point that traversal one is not traversed;
2. judge whether the impact point density in current goal neighborhood of a point is greater than the density threshold of setting, if so, then using this impact point as an element in a cluster set, enter step 3.; Otherwise give up this impact point, this cluster set is complete, enters step 3.;
3. judge whether impact point travels through complete, if so, then terminate; Otherwise, go to step 1..
8. the infrared touch screen multi-point recognition method according to claim 3 or 4, is characterized in that, described method also comprises follows the tracks of the step of moving touch point according to the distance between the position of the touch point of previous moment and the position of current time touch point.
9. an infrared touch screen multi-point recognition method, is characterized in that, comprises the following steps:
Be captured in the light path data in an identifying;
This light path packet blocks and the light path of not blocking containing between the infrared emission component collected after overscanning and infrared receiver component;
Generate the data structure with two-dimensional matrix alignment properties becoming preset ratio with described infrared touch screen dimensions;
The attribute that the data element setting up described data structure is associated with the light path on described infrared touch panel;
The attribute be associated with described light path according to described data element and described light path data extract touch point information;
The foundation of described attribute is adopted with the following method:
The light path through each array element is determined according to the trend of described preset ratio and light path;
The position of the quantity of record through the light path of each array element and the light path through this array element or sequence number.
10. infrared touch screen multi-point recognition method according to claim 9, is characterized in that, described data structure is two-dimensional array, and described data element is array element.
11. infrared touch screen multi-point recognition methods according to claim 9, is characterized in that, describedly set up the attribute that described data element is associated with described light path and are specially:
The light path through each data element is determined according to the trend of described preset ratio and described light path;
The position of the quantity of record through the light path of each data element and the light path through this data element or sequence number.
12. infrared touch screen multi-point recognition methods according to claim 9, is characterized in that, the concrete steps of described extraction touch point information are as follows:
According to the attribute be associated between described data element with described light path and described light path data search impact point;
Setting density threshold, travels through each impact point successively, carries out cluster according to cluster condition to impact point, obtain at least one cluster set;
Calculate the area that the centre coordinate of each cluster set internal object point and impact point cover, using the coordinate of described centre coordinate as touch point, the area that described impact point covers is as the area of touch point.
13. infrared touch screen multi-point recognition methods according to claim 9, is characterized in that, the concrete steps of described extraction touch point information are as follows:
According to the attribute be associated between described data element with described light path and described light path data search impact point;
Setting density threshold, travels through each impact point successively, carries out cluster according to cluster condition to impact point, obtain at least one cluster set;
Setting area threshold, judges whether the area that each cluster set covers is greater than described area threshold, if be greater than successively, be then a touch point by this cluster set cooperation, otherwise, give up this cluster set, judge next cluster set, until judged that all cluster sets are only combined into;
The area that the centre coordinate of each cluster set internal object point that calculating is not rejected and impact point cover, using the coordinate of described centre coordinate as touch point, the area that described impact point covers is as the area of touch point.
14. infrared touch screen multi-point recognition methods according to claim 12 or 13, is characterized in that, described in search the method for impact point as follows:
1. the data element that traversal one is not traversed;
2. not traversed light path through current data element is traveled through;
3. judge whether current light path is blocked, the quantity of the light path be if so, then associated with current data element subtracts 1, and enters step 4.; Otherwise, directly enter step 4.;
4. judge whether to have traveled through all light paths through current data element, if so, then enter step 5.; Otherwise, go to step 2.;
5. judge whether the quantity of the light path be associated with current data element becomes 0, if so, then this data element is labeled as an impact point, enters step 6.; Otherwise, directly enter step 6.;
6. judge whether all data elements are disposed, and if so, then terminate; Otherwise, go to step 1..
15. infrared touch screen multi-point recognition methods according to claim 12 or 13, is characterized in that, described in search the method for impact point as follows:
1. according to described light path data, travel through the light path that each is blocked, by with each light path be blocked the light path quantity that is associated of the data element of process subtract 1;
2. again travel through a data element of the light path process be blocked, judge whether the quantity of the light path through this data element becomes 0, if so, then this data element is labeled as an impact point, enters step 3.; Otherwise, directly enter step 3.;
3. judge whether all data elements processing the light path process be blocked, if so, then terminate, otherwise, then go to step 2..
16. infrared touch screen multi-point recognition methods according to claim 12 or 13, is characterized in that, described to carry out the method for cluster to impact point as follows:
1. the impact point that traversal one is not traversed;
2. judge whether the impact point density in current goal neighborhood of a point is greater than the density threshold of setting, if so, then using this impact point as an element in a cluster set, enter step 3.; Otherwise give up this impact point, this cluster set is complete, enters step 3.;
3. judge whether impact point travels through complete, if so, then terminate; Otherwise, go to step 1..
17. infrared touch screen multi-point recognition methods according to claim 12 or 13, is characterized in that, described method also comprises follows the tracks of the step of moving touch point according to the distance between the position of the touch point of previous moment and the position of current time touch point.
The multiple spot recognition system of 18. 1 kinds of infrared touch panels, is characterized in that, comprise
For being captured in the data collector of the light path data in an identifying, this light path packet blocks and the light path of not blocking containing between the infrared emission component collected after overscanning and infrared receiver component;
For generating the video generation device becoming the image of preset ratio with described infrared touch screen dimensions;
For the attribute apparatus for establishing of the attribute that the pixel setting up described image is associated with the light path on described infrared touch panel;
The touch point information extracting device of touch point information is extracted for the attribute that is associated with described light path according to described pixel and described light path data;
Wherein, attribute apparatus for establishing comprises light path determining unit and attribute record unit;
Described light path determining unit is for determining the light path through each pixel according to the trend of described preset ratio and light path;
Described attribute record unit is for recording position or the sequence number of the quantity through the light path of each pixel and the light path through this pixel.
The multiple spot recognition system of 19. infrared touch panels according to claim 18, is characterized in that, described attribute apparatus for establishing comprises:
For determining the light path determining unit of the light path through each pixel according to the trend of described preset ratio and described light path;
For recording position or the sequence number attribute record unit of the quantity through the light path of each pixel and the light path through this pixel.
The multiple spot recognition system of 20. infrared touch panels according to claim 18, is characterized in that, described touch point information extracting device comprises:
For searching unit according to the impact point of the attribute be associated between described pixel with described light path and described light path data search impact point;
For carrying out the cluster cell of cluster to impact point according to cluster condition;
For the touch point computing unit of the area of the coordinate and touch point that calculate touch point, described touch point computing unit calculates the area that the centre coordinate of each cluster set internal object point and impact point cover, using the coordinate of described centre coordinate as touch point, the area that described impact point covers is as the area of touch point.
The multiple spot recognition system of 21. infrared touch panels according to claim 18, is characterized in that, described touch point information extracting device comprises:
For searching unit according to the impact point of the attribute be associated between described pixel with described light path and described light path data search impact point;
For carrying out the cluster cell of cluster to impact point according to cluster condition, described cluster cell setting density threshold, travels through each impact point successively, carries out cluster according to cluster condition to impact point, obtain at least one cluster set;
For judging whether area that each cluster set covers is greater than the area judging unit of described area threshold successively, described area judging unit setting area threshold, judge whether area that each cluster set covers is greater than the area judging unit of described area threshold successively, if be greater than, be then a touch point by this cluster set cooperation, otherwise, give up this cluster set, judge next cluster set, until judged that all cluster sets are only combined into;
For the touch point computing unit of the area of the coordinate and touch point that calculate touch point, described touch point computing unit calculates the area that the centre coordinate of each cluster set internal object point be not rejected and impact point cover, using the coordinate of described centre coordinate as touch point, the area that described impact point covers is as the area of touch point.
22. according to claim 18 to the multiple spot recognition system of the infrared touch panel according to any one of 21, it is characterized in that, described system also comprises follows the tracks of for the distance between the position of the touch point according to previous moment and the position of current time touch point the motion tracer moved touch point.
The multiple spot recognition system of 23. 1 kinds of infrared touch panels, is characterized in that, comprise
For being captured in the data collector of the light path data in an identifying, this light path packet blocks and the light path of not blocking containing between the infrared emission component collected after overscanning and infrared receiver component;
For generating the data structure building device with the data structure of two-dimensional matrix alignment properties becoming preset ratio with described infrared touch screen dimensions;
For the attribute apparatus for establishing of the attribute that the data element setting up described data structure is associated with the light path on described infrared touch panel;
The touch point information extracting device of touch point information is extracted for the attribute that is associated with described light path according to described data element and described light path data;
Wherein, attribute apparatus for establishing comprises light path determining unit and attribute record unit;
Described light path determining unit is for determining the light path through each array element according to the trend of described preset ratio and light path;
Described attribute record unit is for recording position or the sequence number of the quantity through the light path of each array element and the light path through this array element.
The multiple spot recognition system of 24. infrared touch panels according to claim 23, is characterized in that, described attribute apparatus for establishing comprises:
For determining the light path determining unit of the light path through each data element according to the trend of described preset ratio and described light path;
For recording position or the sequence number attribute record unit of the quantity through the light path of each data element and the light path through this data element.
The multiple spot recognition system of 25. infrared touch panels according to claim 23, is characterized in that, described touch point information extracting device comprises:
For searching unit according to the impact point of the attribute be associated between described data element with described light path and described light path data search impact point;
For carrying out the cluster cell of cluster to impact point according to cluster condition, described cluster cell setting density threshold, travels through each impact point successively, carries out cluster according to cluster condition to impact point, obtain at least one cluster set;
For the touch point computing unit of the area of the coordinate and touch point that calculate touch point, described touch point computing unit calculates the area that the centre coordinate of each cluster set internal object point and impact point cover, using the coordinate of described centre coordinate as touch point, the area that described impact point covers is as the area of touch point.
The multiple spot recognition system of 26. infrared touch panels according to claim 23, is characterized in that, described touch point information extracting device comprises:
For searching unit according to the impact point of the attribute be associated between described data element with described light path and described light path data search impact point;
For carrying out the cluster cell of cluster to impact point according to cluster condition;
For judging whether area that each cluster set covers is greater than the area judging unit of described area threshold successively, described area judging unit setting area threshold, judge whether area that each cluster set covers is greater than the area judging unit of described area threshold successively, if be greater than, be then a touch point by this cluster set cooperation, otherwise, give up this cluster set, judge next cluster set, until judged that all cluster sets are only combined into;
For the touch point computing unit of the area of the coordinate and touch point that calculate touch point, described touch point computing unit calculates the area that the centre coordinate of each cluster set internal object point be not rejected and impact point cover, using the coordinate of described centre coordinate as touch point, the area that described impact point covers is as the area of touch point.
The multiple spot recognition system of 27. infrared touch panels according to any one of claim 23 to 26, it is characterized in that, described system also comprises follows the tracks of for the distance between the position of the touch point according to previous moment and the position of current time touch point the motion tracer moved touch point.
CN201110221822.9A 2011-08-03 2011-08-03 A kind of infrared touch screen multi-point recognition method and system Expired - Fee Related CN102419663B (en)

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Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102419663B (en) * 2011-08-03 2015-10-14 北京汇冠新技术股份有限公司 A kind of infrared touch screen multi-point recognition method and system
CN102419664B (en) * 2011-08-03 2014-04-02 北京汇冠新技术股份有限公司 Multi-point identification method and system of infrared touch screen
CN103885644A (en) * 2012-12-21 2014-06-25 北京汇冠新技术股份有限公司 Method of improving infrared touch screen touch precision and system thereof
CN103902104B (en) * 2012-12-25 2017-03-08 北京汇冠新技术股份有限公司 Scan data analysis method and device for infrared touch panel
CN103970360B (en) * 2013-01-30 2017-02-08 北京汇冠新技术股份有限公司 Multipoint-touch-based gesture identification method and system
CN103399674B (en) * 2013-08-01 2016-05-18 广东威创视讯科技股份有限公司 A kind of multipoint touch detection method and device
CN103699273B (en) * 2013-12-26 2016-09-21 广州视睿电子科技有限公司 Touch point identification method and system of infrared touch screen
CN104238834B (en) * 2014-09-28 2020-03-20 青岛海信电器股份有限公司 Method and system for improving touch sensitivity
CN104615311B (en) * 2015-02-10 2017-09-26 青岛海信电器股份有限公司 A kind of touch-screen localization method, device and touch-screen equipment
CN106055169B (en) * 2016-07-29 2019-04-02 创业保姆(广州)商务秘书有限公司 False-touch prevention method and its intelligent express delivery cabinet based on test point density value
CN110794994A (en) * 2019-09-27 2020-02-14 深圳市天英联合教育股份有限公司 Method and device for determining real contact
CN114253417B (en) * 2021-12-02 2024-02-02 Tcl华星光电技术有限公司 Multi-touch point identification method and device, computer readable medium and electronic equipment
CN114816130B (en) * 2022-06-29 2022-09-20 长沙朗源电子科技有限公司 Writing recognition method and system of electronic whiteboard, storage medium and electronic whiteboard

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN101727245A (en) * 2008-10-15 2010-06-09 北京京东方光电科技有限公司 Multi-touch positioning method and multi-touch screen
CN101995997A (en) * 2009-08-21 2011-03-30 厦门信烨联动传媒有限公司 Multipoint infrared touch screen and touch positioning method thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100782431B1 (en) * 2006-09-29 2007-12-05 주식회사 넥시오 Multi position detecting method and area detecting method in infrared rays type touch screen
CN101876869A (en) * 2009-04-30 2010-11-03 鸿富锦精密工业（深圳）有限公司 Electronic device and method for controlling same to input
CN102033658A (en) * 2009-09-30 2011-04-27 北京汇冠新技术股份有限公司 Touch screen, touch system and positioning method thereof
US8803846B2 (en) * 2009-12-17 2014-08-12 Lg Display Co., Ltd. Method for detecting touch and optical touch sensing system
CN102004586B (en) * 2010-11-23 2013-01-09 广东威创视讯科技股份有限公司 Touch point positioning device and method
CN102419663B (en) * 2011-08-03 2015-10-14 北京汇冠新技术股份有限公司 A kind of infrared touch screen multi-point recognition method and system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN101727245A (en) * 2008-10-15 2010-06-09 北京京东方光电科技有限公司 Multi-touch positioning method and multi-touch screen
CN101995997A (en) * 2009-08-21 2011-03-30 厦门信烨联动传媒有限公司 Multipoint infrared touch screen and touch positioning method thereof

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