CN103970360B - Multipoint-touch-based gesture identification method and system - Google Patents
Multipoint-touch-based gesture identification method and system Download PDFInfo
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Abstract
The invention relates to a multipoint-touch-based gesture identification method and a multipoint-touch-based gesture identification system. The method is applied to an infrared touch screen with infrared transmission and receiving geminate transistor arrays which are arranged along the periphery of an effective touch area. According to the method, when a plurality of touch points exist in the effective touch area, pseudo touch points are not required to be removed, and quasi touch points are divided into different point sets according to the distances between the quasi touch points; if only one point set is formed, single-hand operation is determined, and the geometric center of the point set is determined as the center output of the touch points; if more than one point set is formed, a true point set is found, and the geometric center of the true point set is determined as the center output of the touch points. The touch points on the effective touch area of the infrared touch screen can be identified under the condition of not adding scanning lines only by the gesture identification method, and the hardware of the infrared touch screen is not required to be changed; the method the system have the advantages of small computation amount, high execution efficiency and low research and development cost.
Description
Technical field
The present invention relates to a kind of gesture identification method based on multiple point touching and system, belong to microprocessor control technology neck
Domain, is particularly useful for the touch point detection technique field of infrared touch panel.
Background technology
Infrared touch panel of the prior art, as shown in figure 1, be provided with one on the frame of effective Petting Area border surrounding
One corresponding infrared transmitting tube 1 and infrared receiving tube 2.Processor controls at a time only one of which by sequential control circuit
Infrared transmitting tube 1 launches Infrared（Hereinafter referred to as scan line）, thus reception pipe 2 corresponding at this moment can only receive
Scan line on one direction.Within a scan period, processor controls each infrared transmitting tube 1 to launch scan line successively
Effective Petting Area is scanned；If with the presence of touch point in effective Petting Area, touch point meeting stop portions scan line, according to quilt
The positional information of the infrared transmitting tube 1 corresponding to the scan line blocked and infrared receiver 2 pipe can determine that the position letter of touch point
Breath.
If only one of which touch point in effective Petting Area（Single-touch）, then the scan line blocked according to touch point Lai
Directly judge the positional information of touch point, the operating system of the affiliated display system of touch screen further according to touch point positional information and
Movement locus come to judge touch operation be click on or drag operation.
If having two touch points in effective Petting Area（Two touch）, Fig. 2 gives has two to touch in effective Petting Area
Touch situation a little.It can be seen that when there being two touch points in effective Petting Area, iff by man-to-man scanning
Mode is scanned, and can obtain four quasi- touch points, including actual touch point 3, and pseudo- touch point 4.Now to accurately obtain
The positional information of actual touch point is in addition it is also necessary to be removed the operation of pseudo- touch point.In prior art, remove the side of pseudo- touch point
Method has following several：（1）By one group, there is the first angle of inclination（Optional main shaft scanning）Parallel scan lines be scanned,
Obtain the position of quasi- touch point, be then scanned using the parallel scan lines with the second angle of inclination, the pseudo- touch point of exclusion；
（2）It is scanned using the parallel scan lines at the first angle of inclination and the parallel scan lines at the second angle of inclination simultaneously, directly arrange
Except pseudo- touch point；（3）Scan mode using one-to-many is scanned, and obtains each touch on the basis of infrared transmitting tube one end
First beginning boundary of point and the first termination border, obtained each touch point on the basis of infrared receiving tube one end second is initiateed
Border and the second termination border, the intersection point of the first beginning boundary and the second beginning boundary is as actual beginning boundary, the first termination
Border and the intersection point on the second termination border, terminate border as actual, thus obtain the boundary information of actual touch point.Above three
The mode of kind, has been documented in detail in the patent application document CN 201210514711.1 before applicant, here is not made
Excessive explanation.After removing pseudo- touch point, the operating system of the affiliated display system of touch screen is believed further according to the position of touch point
It is the operation such as to amplify, reduce, rotating that breath to judge touch operation with movement locus.
In infrared touch panel, more ripe to the technology of identification of single-touch and two touch, but be as touching
The continuing to increase of screen dimensions, the range of application of touch screen is also more and more wider.For example, existing vehicle supervision department adopts large scale
Touch screen showing electronic chart, traffic information etc.；And for example in the command centre of some vital tasks, large scale also can be adopted
Touch screen carry out monitor task practice condition.In the case of such an application, single-touch or two touch inapplicable, more
Apply the touch for singlehanded or both hands.It is for instance possible to use the five of handss fingers are put on the touchscreen, by five handss
Refer to dragging come to realize pull operation；Two handss all can also be put on the touchscreen, the finger of every handss is pulled outwardly respectively,
Realize enlarging function.In order to realize the function of above-mentioned simple gesture identification, in prior art, pass through the scanned of design complexity
Corresponding for each finger touch point is identified by journey respectively, and judges it is singlehanded after following the tracks of the movement locus of each touch point
Operation or the operation of many handss, and be to amplify, reduce or the operation rotating.Obviously, if to follow the tracks of five touch points or
The movement locus of ten touch points, will certainly make scan mode extremely complex in infrared touch panel, and to scan data
Process and be even more difficulty, to a certain extent, necessarily affect the response speed of infrared touch panel.
Content of the invention
The technical problem to be solved is to identify in prior art that singlehanded touch or both hands touch using complicated
Scan mode data process the response speed of impact infrared touch panel, thus provide a kind of simple by the touch of every handss
It is approximately the gesture identification method based on multiple point touching and the system of single-touch.
For solving above-mentioned technical problem, the present invention is achieved by the following technical solutions：A kind of based on multiple point touching
Gesture identification method, comprises the steps：
S1：Horizontal and vertical scanning is carried out to effective Petting Area, the scan line position according to being blocked determines quasi- touch point
Positional information；
S2：Touch point number is judged according to the number of regions that transversal scanning and longitudinal scanning are blocked, number is when touch point
When one, the operation of execution single-touch, is then back to described step S1；When touch point number is two, execution two touch behaviour
Make, be then back to described step S1；It is otherwise multiple point touching, be directly entered step S3；
S3：In real time point set is divided according to the positional information of each quasi- touch point, and point set is obtained according to the point set dividing
Number j；
S4：According to point set number j, export the centre coordinate of the touch point of true point set.
The step judging touch point number in described step S2 is as follows：
Obtain number of regions f that number of regions e that is blocked of transversal scanning and longitudinal scanning are blocked:
If Max（E, f）=1, then for single-touch；
If Max（E, f）=2, then for two touch;
If Max（E, f）>2, then for multiple point touching.
In described step S3, the positional information according to each quasi- touch point is as follows come the step that divides point set：
Positional information according to each quasi- touch point in real time, obtain any two quasi- touch points between apart from dm, and with set
Determine threshold value D to compare：By between quasi- for any two touch point apart from dmThe quasi- touch point being respectively less than described given threshold D is divided into one
Individual point set, obtains point set number j.
In described step S4, the step exporting the centre coordinate of the touch point of true point set according to point set number j is as follows：
If j=1, this point set is true point set, and the geometric center of this point set is exported as the centre coordinate of touch point；
If j ＞ 1, filter out the true point set that a concentration comprises true touch point, using the geometric center of each described true point set as touch
The centre coordinate output of point.
The method screening true point set in described step S4 comprises the steps：
S41：By the scan mode of one-to-many, transversal scanning is carried out to effective Petting Area, with infrared transmitting tube one end be
Benchmark, first scan line blocked by true touch point is horizontal first beginning boundary of true touch point, and the last item is swept
Retouch the horizontal first termination border that line is true touch point；
On the basis of infrared receiving tube one end, first scan line blocked by true touch point is the horizontal stroke of true touch point
To the second beginning boundary, the last item scan line is the horizontal second termination border of true touch point；
The abscissa of the intersection point of horizontal first beginning boundary of true touch point and horizontal second beginning boundary is truly to touch
Touch horizontal beginning boundary a little；Horizontal the first of true touch point terminates the horizontal seat of the intersection point on border and horizontal second termination border
It is designated as the horizontal termination border of true touch point；
S42：Repeat said process in the vertical, obtain longitudinal beginning boundary and the longitudinal termination border of true touch point；
S43：Horizontal beginning boundary according to true touch point and horizontal termination border and longitudinal beginning boundary and longitudinal direction
Terminate border, determine the positional information of this true touch point；
S44：Determine that the point set that it is located is true point set according to the positional information of true touch point.
In described step S4, the method for the true point set of screening, comprise the steps：
S4A：Laterally/longitudinal direction carries out one-to-many scanning to described effective Petting Area；
S4B：On the basis of infrared transmitting tube one end, first article of scan line being blocked is that horizontal/longitudinal the 3rd initiates
Border, the last item scan line is the 3rd horizontal/longitudinal termination border；
On the basis of infrared receiving tube one end, first scan line being blocked is fourth horizontal/longitudinal initial line circle,
The last item scan line is the 4th horizontal/longitudinal termination border；
The intersection point of described horizontal/longitudinal 3rd beginning boundary and described horizontal/fourth initial line circle longitudinal is horizontal/longitudinal
3rd boundary point, described laterally/longitudinally the 3rd terminate border and described laterally/longitudinally the 4th termination border intersection point be laterally/
Longitudinally the 4th boundary point；
S4C：On described horizontal/longitudinal 3rd boundary point with described horizontal/longitudinal 4th boundary point line direction
Point set is true point set.
Described given threshold D is set to 20cm.
The present invention also provides a kind of gesture recognition system based on multiple point touching, including：
For effective Petting Area is carried out with horizontal and vertical scanning, and accurate touch is determined according to the scan line position being blocked
The device of the positional information of point；
For touch point number is judged according to the number of regions that transversal scanning and longitudinal scanning are blocked, and according to touch point
Number judges the device of mode of operation；
Divide point set for the positional information according to each quasi- touch point, and point set number is obtained according to the point set dividing
The device of j；
For according to point set number j, exporting the device of the centre coordinate of touch point of true point set.
Described for touch point number is judged according to the number of regions that transversal scanning and longitudinal scanning are blocked, and according to touch
Point number judges the device of mode of operation, further includes：
Obtain number of regions e that is blocked of transversal scanning and the device of number of regions f that longitudinal scanning is blocked；
Judge Max（E, f）It is whether 1 device, if 1 is single-touch；
Judge Max（E, f）It is whether 2 device, if 2 is two touch；
Judge Max（E, f）Whether being more than 2 device, if being more than 2, being multiple point touching.
Described divide point set for the positional information according to each quasi- touch point, and point set is obtained according to the point set dividing
The device of number j still further comprises：
Device for given threshold D size；
For the positional information according to each quasi- touch point in real time, obtain between any two quasi- touch points apart from dm, and
Compare with given threshold D：Between the quasi- touch point of any two apart from dmThe quasi- touch point being respectively less than described given threshold D is divided into
The device of one point set；
Obtain the device of point set number j.
For according to point set number j, the device exporting the centre coordinate of touch point of true point set further includes：
For the dress when point set number is, the geometric center of this point set being exported as the centre coordinate of touch point
Put；
For when point set number is more than one, filtering out the true point set that a concentration comprises true touch point, by each institute
State the device as the centre coordinate output of touch point for the geometric center of true point set.
Described for when point set number is more than one, filtering out the true point set that a concentration comprises true touch point, will be every
The geometric center of individual described true point set further includes as the device of the centre coordinate output of touch point：
For carrying out after transversal scanning to effective Petting Area by the scan mode of one-to-many, obtain the horizontal of real touch point
Beginning boundary and the horizontal device terminating border；
Indulge for acquisition true touch point after longitudinal scanning is carried out by the scan mode of one-to-many to effective Petting Area
Device to beginning boundary and longitudinal termination border；
For the horizontal beginning boundary according to true touch point and horizontal termination border and longitudinal beginning boundary and longitudinal direction
Terminate border, after determining the positional information of true touch point, the true point set comprising true touch point is filtered out from a concentration
Device.
Described for when point set number is more than one, filtering out the true point set that a concentration comprises true touch point, will be every
The geometric center of individual described true point set further includes as the device of the centre coordinate output of touch point：
For being carried out to effective Petting Area after laterally/longitudinal scanning by the scan mode of one-to-many, obtain horizontal/longitudinal
The device of the position of the position of the 3rd boundary point and laterally/longitudinal 4th boundary point；
For will positioned at described laterally/longitudinally the 3rd boundary point with described laterally/longitudinal the 4th boundary point line direction
The device that screens of point set.
The technique scheme of the present invention has advantages below compared to existing technology：
（1）Gesture identification method based on multiple point touching of the present invention and system, can not increase scan line
In the case of, only passing through gesture identification method of the present invention just can be to multiple tactile on effective Petting Area of infrared touch panel
Touch and be a little identified.The present invention divides point set, each point to the multiple touch points on effective Petting Area of infrared touch panel first
Collection had not only comprised true touch point but also had comprised pseudo- touch point, completely without the operation being removed pseudo- touch point；And according to point set
Number belongs to singlehanded or both hands judging multiple touch points.When point set number is 1, touches for singlehanded, point set can be regarded as
Single-touch operates, and the geometric center of point set is exported as the centre coordinate of touch point as the positional information of touch point；When
When point set number is not 1, it is that both hands touch, after removing pseudo- touch point set, remaining two true point sets are regarded as two point operation, will
The geometric center of true point set exports as the positional information of touch point as the centre coordinate of touch point.Display system belonging to touch screen
Which kind of operation is the operating system of system to judge to touch for further according to the positional information of touch point.The present invention is without change infrared touch
The hardware of screen, is approximately single-touch or is approximately both hands touch it is only necessary to touch one hand without increase scan line
Two touch can achieve simple gesture identification method it is possible to the multiple touches on effective Petting Area of infrared touch panel
The operation of point is identified, and has that amount of calculation is little, the advantage that execution efficiency is high, R＆D costs are low.
（2）Gesture identification method based on multiple point touching of the present invention and system, can by the scanning of one-to-many
Accurately determine the positional information of each true touch point, thus obtaining accurately true point set position, have do not need to increase infrared
The hardware of touch screen, only just can remove the pseudo- advantage touching point set by existing scan mode.
（3）Gesture identification method based on multiple point touching of the present invention and system, when removing pseudo- touch point set, lead to
Cross the scan mode of one-to-many and effective Petting Area is scanned transversely or longitudinally going up, respectively on the basis of infrared transmitting tube
With the outermost four edges boundary line on the basis of infrared receiving tube, determining forward and reverse, this four edges boundary line must be right
Answer true touch point, and this four edges boundary line has two intersection points, the direction connecting the line segment of this two intersection points necessarily represents
The line direction of true point set, thus obtain the positional information of accurately true point set.Therefore not it needs to be determined that each true touch point
Positional information, and only need to carry out start boundary point and the end that the scanning that a direction carries out one-to-many determines institute's pointed set
Only boundary point, has the hardware not needing to increase infrared touch panel, only passes through existing scan mode and just can remove pseudo- touch
The advantage of point set.
Brief description
In order that present disclosure is more likely to be clearly understood, below in conjunction with the accompanying drawings, detailed further to present invention work
Thin explanation, wherein,
Fig. 1 is the structural representation of infrared touch panel of the present invention；
Fig. 2 is the schematic diagram of two touch in effective Petting Area of the present invention；
Fig. 3 is the schematic diagram of multiple point touching in effective Petting Area of the present invention；
Fig. 4 is the schematic diagram being divided into multiple point sets during multiple point touching of the present invention；
Fig. 5 is the enlarged diagram of I portion shown in Fig. 4；
When Fig. 6 is that point is concentrated with three true touch points, the determination method of geometric center；
Fig. 7 is the schematic diagram of the horizontal boundary determining true touch point by the scan mode of one-to-many of the present invention；
Fig. 8 is the schematic diagram determining point concentration true touch point horizontal boundary of the present invention；
Fig. 9 is the horizontal start boundary point of point set of the present invention and the horizontal signal terminating the line before boundary point
Figure；
In figure reference is expressed as：1- infrared transmitting tube, 2- infrared receiving tube, 3- true touch point, 31- first is true
Touch point, 32- second true touch point, 4- puppet touch point, the true point set of 5-, 6- puppet point set, the geometric center of the true point set of 7-.
Specific embodiment
As the content said in background technology, when having a touch point and two touch points in effective Petting Area, can
To obtain positional information and the movement locus of touch point according to method of the prior art.Present invention mainly solves be when adopt
When singlehanded touch or both hands touch, the more than two situation in the touch point in effective Petting Area.The following reality of the therefore present invention
Applying example is all to apply when the touch point in effective Petting Area is three and more than three.
Embodiment 1
The present embodiment provides a kind of gesture identification method based on multiple point touching, comprises the steps：
S1：Gating infrared transmitting tube 1 and corresponding infrared receiving tube 2, carry out horizontal and vertical to effective Petting Area one by one
Scanning, the scan line position according to being blocked determines the positional information of quasi- touch point；In this step, can select the simplest
One-to-one scan mode, that is, infrared transmitting tube 1 launch scan line, control a corresponding infrared receiving tube 2 to connect
Receive scan line, be scanned using man-to-man scan mode, it may appear that pseudo- when there is multiple touch point in effective Petting Area
Touch point, as shown in figure 3, wherein black round dot represents true touch point 3, white round dot represents pseudo- touch point 4；Now obtain
Touch dot position information and include actual touch dot position information and pseudo- touch dot position information, true touch point and pseudo- touch point system
Referred to as quasi- touch point；
S2：Touch point number is judged according to the number of regions that transversal scanning and longitudinal scanning are blocked, wherein obtains touch point
The method of number be to obtain number of regions e that transversal scanning is blocked and number of regions f that longitudinal scanning is blocked:
If Max（E, f）=1, then touch point number is 1, is single-touch, returns described step S1；
If Max（E, f）=2, then touch point number is 2, is two touch, returns described step S1;
If Max（E, f）>2, then when touch point number is more than 2, it is multiple point touching, is directly entered step S3.
S3：In real time point set is divided according to the positional information of each quasi- touch point, and point set is obtained according to the point set dividing
Number j, it comprises the following steps that：Positional information according to each quasi- touch point in real time, obtains between any two quasi- touch points
Apart from dm, and compare with given threshold D：By between quasi- for any two touch point apart from dmThe standard being respectively less than described given threshold D is touched
Touch and be a little divided into a point set；Wherein, between any two quasi- touch points apart from dm, can be sat according to the center of two quasi- touch points
The distance between mark is representing；Described given threshold D sets according to the size of effective Petting Area, in order to improve its accuracy,
The setting of described given threshold D is larger, and generally, the ultimate range between five fingers of handss is left in 10cm
The right side, the touch point in order to avoid touching two hand fingers is mistakenly considered for handss, described given threshold D can be selected to exist
20cm-30cm, it is further preferable that can select described given threshold D to be 20cm.
S4：According to point set number j, export the centre coordinate of the touch point of true point set；It comprises the following steps that：According to described
Quasi- touch point is divided into after point set step S3, obtains point set number j：If j=1 is singlehanded touch, by the singlehanded operation touching
It is approximately the touch of single-point, now the geometric center of point set is exported as the centre coordinate of touch point, as shown in Figure 5.If j
>1, then when being judged to that both hands touch, as shown in figure 4, the point set corresponding to both hands is true point set 5, but similar with two touch
Seemingly, when there is two true point sets, also having pseudo- point set 6 and producing.Therefore in this step, a concentration to be filtered out to comprise really to touch
Touch true point set 5 a little, the geometric center 7 of each described true point set 5 is exported as the centre coordinate of touch point.
The point being given in the present embodiment is concentrated, and has two true touch points, four quasi- touch points, is scanned by main shaft
（I.e. the infrared transmitting tube of gating key light overlapping of axles is scanned with infrared receiving tube one by one）Scan mode scanning after, this point set
In four quasi- touch points can form a rectangle；Fig. 6 gives when a true point is concentrated with three true touch points
Situation, if effective Petting Area being scanned using main shaft scan mode, may produce nine quasi- touch points, but
Nine quasi- touch points still can make up a rectangle.As the embodiment that can select it is also possible to select to scan from axle（I.e.
The misaligned infrared transmitting tube of gating primary optical axis is scanned with infrared receiving tube one by one）Mode effective Petting Area is swept
Retouch, the quasi- touch point obtaining after scanning can form a parallelogram, can select the cornerwise of this parallelogram
Intersection point is as geometric center.
Corresponding with said method, the present embodiment also provides a kind of gesture recognition system based on multiple point touching, including：With
In effective Petting Area is carried out with horizontal and vertical scanning, and determine the position letter of quasi- touch point according to the scan line position being blocked
The device of breath；
For touch point number is judged according to the number of regions that transversal scanning and longitudinal scanning are blocked, and according to touch point
Number judges the device of mode of operation；It further includes：Number of regions e that acquisition transversal scanning is blocked and longitudinal scanning are blocked
Number of regions f device；Judge Max（E, f）It is whether 1 device, if 1 is single-touch；Judge Max（E, f）Whether
Device for 2, if 2 is two touch；Judge Max（E, f）Whether being more than 2 device, if being more than 2, being multiple point touching；
Device for given threshold D size；Divide point set for the positional information according to each quasi- touch point, and root
Obtain the device of point set number j according to the point set dividing；It further includes for the position according to each quasi- touch point in real time
Information, obtain between any two quasi- touch points apart from dm, and compare with given threshold D：Distance between the quasi- touch point of any two
The quasi- touch point of dm respectively less than described given threshold D is divided into the device of a point set；With the device obtaining point set number j；
For according to point set number j, exporting the device of the centre coordinate of touch point of true point set, its further include for
Point set number be one when, using the geometric center of this point set as touch point centre coordinate output device；With for
When point set number is more than one, filter out the true point set that a concentration comprises true touch point, by the geometry of each described true point set
Center 7 is as the device of the centre coordinate output of touch point.
The gesture identification method based on multiple point touching that the present embodiment provides and system are hard without change infrared touch panel
Part, touches it is only necessary to touch one hand to be approximately single-touch or both hands touch is approximately 2 points without increasing scan line
Touch and can achieve simple gesture identification method it is possible to behaviour to the multiple touch points on effective Petting Area of infrared touch panel
It is identified, have that amount of calculation is little, the high advantage of execution efficiency.
Embodiment 2
The present embodiment as the preferred version of embodiment 1, the method screening true point set in step S4 in embodiment 1, can
To adopt following steps：
S41：By the scan mode of one-to-many（The infrared light of one infrared transmitting tube transmitting can be by multiple infrared receiver
Pipe receives）, transversal scanning is carried out to effective Petting Area, as shown in fig. 7, on the basis of infrared transmitting tube one end, by actual touch
First scan line that point blocks is the scan line that No. 01 infrared transmitting tube transmitting, 01 ' number infrared receiving tube receive, and it is true
Horizontal first beginning boundary of touch point, the last item scan line is that No. 03 infrared transmitting tube transmitting, 03 ' number infrared receiving tube connect
The scan line received, it is the horizontal first termination border of true touch point；On the basis of infrared receiving tube one end, by actual touch
First scan line that point blocks is the scan line that 02 ' number infrared receiving tube receives, No. 02 infrared transmitting tube is launched, and it is true
Horizontal second beginning boundary of touch point, the last item scan line is that 04 ' number infrared receiving tube receives, No. 04 infrared transmitting tube is sent out
The scan line penetrated, it is the horizontal second termination border of true touch point；Horizontal first beginning boundary of true touch point and laterally
The abscissa of the intersection point of the second beginning boundary is the horizontal beginning boundary of true touch point；The horizontal first termination side of true touch point
The abscissa of the intersection point on boundary and horizontal second termination border is the horizontal termination border of true touch point；
S42：Repeat said process in the vertical, the longitudinal direction that longitudinal scanning obtains true touch point is carried out to effective Petting Area
Beginning boundary and longitudinal termination border；
S43：Horizontal beginning boundary according to true touch point and horizontal termination border, and longitudinal beginning boundary and longitudinal direction
Terminate border, you can determine the positional information of this true touch point, as shown in Figure 8；
S44：The point set that true touch point is located must be true point set, determine its institute according to the positional information of true touch point
Point set be true point set.As shown in figure 8, when the position determining true touch point according to described step S41 to described step S43
Postpone, the first true touch point 31 of such as in figure and the second true touch point 32, then can directly judge that described first is true
The point set that touch point 31 is located and the point set at described second true touch point 32 place are true point set；
Corresponding with said method, it is used for described in the present embodiment, when point set number is more than one, filtering out a concentration
Comprise the true point set of true touch point, the geometric center 7 of each described true point set is exported as the centre coordinate of touch point
Device further includes：
For carrying out after transversal scanning to effective Petting Area by the scan mode using one-to-many, obtain real touch point
Laterally beginning boundary and the horizontal device terminating border；
For effective Petting Area being carried out obtain after longitudinal scanning with true touch point by the scan mode using one-to-many
Longitudinal beginning boundary and longitudinal termination border device；
For the horizontal beginning boundary according to true touch point and horizontal termination border and longitudinal beginning boundary and longitudinal direction
Terminate border, after determining the positional information of true touch point, the true point set comprising true touch point is filtered out from a concentration
Device.
Embodiment 3
The present embodiment as another preferred implementation of embodiment 1, described step S4, the method screening true point set,
Comprise the steps, taking laterally as a example：
S4A：In the horizontal one-to-many scanning is carried out to described effective Petting Area；
S4B：As shown in figure 9, on the basis of infrared transmitting tube one end, first article of scan line being blocked is horizontal the 3rd
Beginning boundary, the last item scan line is the 3rd horizontal termination border；On the basis of infrared receiving tube one end, be blocked
Article one, scan line is fourth horizontal initial line circle, and the last item scan line is the 4th horizontal termination border；Described horizontal
Three beginning boundary are horizontal 3rd boundary point with the intersection point of described laterally fourth initial line circle, the described horizontal 3rd terminate border with
The intersection point on described horizontal 4th termination border is horizontal 4th boundary point；
S4C：Because described 3rd boundary point and described 4th boundary point must be to be blocked determination by true touch point, because
Necessarily each one true touch point of correspondence at this two boundary points, and the point set that true touch point is located must be just true point set,
It is set to true point set therefore in described horizontal 3rd boundary point with the point set one on described horizontal 4th boundary point line direction.
In the same manner, in the vertical, identical method may also be employed and determine true point set.
Using the method in the present embodiment it is not necessary to determine the positional information of each true touch point, and only need to into
The scanning that one direction of row carries out one-to-many determines the start boundary point of institute's pointed set and terminates boundary point.
Corresponding with said method, it is used for described in the present embodiment, when point set number is more than one, filtering out a concentration
Comprise the true point set of true touch point, the geometric center 7 of each described true point set is exported as the centre coordinate of touch point
Device further includes：
Effective Petting Area is carried out after laterally/longitudinal scanning for the scan mode using one-to-many, obtain horizontal/longitudinal
The device of the position of the position of the 3rd boundary point and laterally/longitudinal 4th boundary point；
For will positioned at described laterally/longitudinally the 3rd boundary point with described laterally/longitudinal the 4th boundary point line direction
The device that screens of point set.
Obviously, above-described embodiment is only intended to clearly illustrate example, and the not restriction to embodiment.Right
For those of ordinary skill in the art, can also make on the basis of the above description other multi-forms change or
Change.There is no need to be exhaustive to all of embodiment.And the obvious change thus extended out or
Change among still in the protection domain of the invention.
Claims (11)
1. a kind of gesture identification method based on multiple point touching is it is characterised in that comprise the steps：
S1：Horizontal and vertical scanning is carried out to effective Petting Area, the scan line position according to being blocked determines the position of quasi- touch point
Confidence ceases；
S2：Touch point number is judged according to the number of regions that transversal scanning and longitudinal scanning are blocked, when touch point number is one
Shi Zhihang single-touch operates, and is then back to described step S1；When touch point number is two, execution two touch operation,
It is then back to described step S1；It is otherwise multiple point touching, be directly entered step S3；
S3：In real time point set is divided according to the positional information of each quasi- touch point, and point set number is obtained according to the point set dividing
j；
S4：According to point set number j, export the centre coordinate of the touch point of true point set；
In described step S4, the step exporting the centre coordinate of the touch point of true point set according to point set number j is as follows：
If j=1, this point set is true point set, and the geometric center of this point set is exported as the centre coordinate of touch point；If j
＞ 1, filters out the true point set that a concentration comprises true touch point, using the geometric center of each described true point set as touch point
Centre coordinate exports.
2. the gesture identification method based on multiple point touching according to claim 1 is it is characterised in that sentence in described step S2
The step of disconnected touch point number is as follows：
Obtain number of regions f that number of regions e that is blocked of transversal scanning and longitudinal scanning are blocked:
If Max (e, f)=1, then for single-touch；
If Max (e, f)=2, then for two touch；
If Max (e, f)>2, then for multiple point touching.
3. the gesture identification method based on multiple point touching according to claim 1 and 2 is it is characterised in that described step S3
The middle positional information according to each quasi- touch point is as follows come the step dividing point set：
Positional information according to each quasi- touch point in real time, obtain any two quasi- touch points between apart from dm, and and given threshold
D compares：By between quasi- for any two touch point apart from dmThe quasi- touch point being respectively less than described given threshold D is divided into a point
Collection, obtains point set number j.
4. the gesture identification method based on multiple point touching according to claim 1 it is characterised in that：
The method screening true point set in described step S4 comprises the steps：
S41：By the scan mode of one-to-many, transversal scanning is carried out to effective Petting Area, on the basis of infrared transmitting tube one end,
First scan line blocked by true touch point is horizontal first beginning boundary of true touch point, and the last item scan line is
The horizontal first termination border of true touch point；
On the basis of infrared receiving tube one end, first article of scan line being blocked by true touch point is horizontal the of true touch point
Two beginning boundary, the last item scan line is the horizontal second termination border of true touch point；
The abscissa of the intersection point of horizontal first beginning boundary of true touch point and horizontal second beginning boundary is true touch point
Horizontal beginning boundary；Horizontal the first of true touch point terminates border and the abscissa of the horizontal second intersection point terminating border is
The horizontal termination border of true touch point；
S42：Repeat said process in the vertical, obtain longitudinal beginning boundary and the longitudinal termination border of true touch point；
S43：Horizontal beginning boundary according to true touch point and horizontal termination border and longitudinal beginning boundary and longitudinal termination
Border, determines the positional information of this true touch point；
S44：Determine that the point set that it is located is true point set according to the positional information of true touch point.
5. the gesture identification method based on multiple point touching according to claim 1 it is characterised in that：
In described step S4, the method for the true point set of screening, comprise the steps：
S4A：Laterally/longitudinal direction carries out one-to-many scanning to described effective Petting Area；
S4B：On the basis of infrared transmitting tube one end, first article of scan line being blocked is the 3rd horizontal/longitudinal beginning boundary,
The last item scan line is the 3rd horizontal/longitudinal termination border；
On the basis of infrared receiving tube one end, first scan line being blocked is fourth horizontal/longitudinal initial line circle, finally
Article one, scan line is the 4th horizontal/longitudinal termination border；
Described laterally/longitudinally the 3rd beginning boundary with described laterally/longitudinally the intersection point of fourth initial line circle be laterally/longitudinally the 3rd
Boundary point, described horizontal/longitudinal 3rd termination border and described horizontal/the longitudinal 4th intersection point terminating border are horizontal/longitudinal
4th boundary point；
S4C：Point set on described horizontal/longitudinal 3rd boundary point with described horizontal/longitudinal 4th boundary point line direction
It is true point set.
6. the gesture identification method based on multiple point touching according to claim 3 it is characterised in that：
Described given threshold D is set to 20cm.
7. a kind of gesture recognition system based on multiple point touching is it is characterised in that include：
For horizontal and vertical scanning is carried out to effective Petting Area, and quasi- touch point is determined according to the scan line position being blocked
The device of positional information；
For touch point number is judged according to the number of regions that transversal scanning and longitudinal scanning are blocked, and sentenced according to touch point number
The device of disconnected mode of operation；
Divide point set for the positional information according to each quasi- touch point, and point set number j is obtained according to the point set dividing
Device；
For according to point set number j, exporting the device of the centre coordinate of touch point of true point set；
For according to point set number j, the device exporting the centre coordinate of touch point of true point set further includes：
For the device when point set number is, the geometric center of this point set being exported as the centre coordinate of touch point；
For when point set number is more than one, filtering out the true point set that a concentration comprises true touch point, each is described true
The geometric center of point set is as the device of the centre coordinate output of touch point.
8. the gesture recognition system based on multiple point touching according to claim 7 it is characterised in that
Described for touch point number is judged according to the number of regions that transversal scanning and longitudinal scanning are blocked and individual according to touch point
Number judges the device of mode of operation, further includes：
Obtain number of regions e that is blocked of transversal scanning and the device of number of regions f that longitudinal scanning is blocked；
Judge that whether Max (e, f) is 1 device, if 1 is single-touch；
Judge that whether Max (e, f) is 2 device, if 2 is two touch；
Judging the device whether Max (e, f) is more than 2, if being more than 2, being multiple point touching.
9. the gesture recognition system based on multiple point touching according to claim 7 or 8 it is characterised in that described for root
To divide point set according to the positional information of each quasi- touch point, and also to enter one according to the device that the point set dividing obtains point set number j
Step includes：
Device for given threshold D size；
For the positional information according to each quasi- touch point in real time, obtain between any two quasi- touch points apart from dm, and with setting
Threshold value D compares：Between the quasi- touch point of any two apart from dmThe quasi- touch point being respectively less than described given threshold D is divided into a point
The device of collection；
Obtain the device of point set number j.
10. the gesture recognition system based on multiple point touching according to claim 7 it is characterised in that described in point
When collection number is more than one, filter out the true point set that a concentration comprises true touch point, by the geometry of each described true point set
The heart further includes as the device of the centre coordinate output of touch point：
For carrying out after transversal scanning to effective Petting Area by the scan mode of one-to-many, obtain laterally initiateing of real touch point
Border and the horizontal device terminating border；
Longitudinal direction for effective Petting Area is carried out obtain after longitudinal scanning with true touch point by the scan mode of one-to-many rises
Initial line circle and the device on longitudinal termination border；
For the horizontal beginning boundary according to true touch point and horizontal termination border and longitudinal beginning boundary and longitudinal termination
Border, after determining the positional information of true touch point, device that the true point set comprising true touch point is filtered out from a concentration.
11. gesture recognition systems based on multiple point touching according to claim 7 it is characterised in that described in point
When collection number is more than one, filter out the true point set that a concentration comprises true touch point, by the geometry of each described true point set
The heart further includes as the device of the centre coordinate output of touch point：
For being carried out to effective Petting Area after laterally/longitudinal scanning by the scan mode of one-to-many, obtain laterally/longitudinally the 3rd
The device of the position of the position of boundary point and laterally/longitudinal 4th boundary point；
For by positioned at described laterally/longitudinally the 3rd boundary point with described laterally/the longitudinal point on the 4th boundary point line direction
Collect the device screening.
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| CN105094463B (en) * | 2015-07-22 | 2018-09-25 | 深圳市天英联合教育股份有限公司 | Infrared touch screen and its scan method |
| CN105094462B (en) * | 2015-07-22 | 2018-04-10 | 深圳市天英联合教育股份有限公司 | Infrared touch screen and its touch detection method |
| CN105808023B (en) * | 2016-03-14 | 2019-01-29 | 青岛海信电器股份有限公司 | A kind of recognition methods of touch point and infrared touch device |
| CN110162257A (en) * | 2018-02-13 | 2019-08-23 | 北京仁光科技有限公司 | Multiconductor touch control method, device, equipment and computer readable storage medium |
| CN114296621B (en) * | 2021-12-23 | 2023-06-09 | 天翼视讯传媒有限公司 | Three-point touch recognition calculation method for touch screen |
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