CN103399674B - A kind of multipoint touch detection method and device - Google Patents
A kind of multipoint touch detection method and device Download PDFInfo
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- CN103399674B CN103399674B CN201310333121.3A CN201310333121A CN103399674B CN 103399674 B CN103399674 B CN 103399674B CN 201310333121 A CN201310333121 A CN 201310333121A CN 103399674 B CN103399674 B CN 103399674B
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Abstract
The embodiment of the invention discloses a kind of multipoint touch detection method and device. Embodiment of the present invention method comprises: the colouring information that each scanning dimension on touch-screen is set; Read and calculate the data of blocking of each dimension scanning on touch-screen, calculate the minimum touch point number N on touch-screen; Convert the touch location of each scanning dimension and width information to line segment with color and width, draw line segments forms image; Image is carried out to binary conversion treatment, identify position and the area of each touch point in image; If the number of touch point equals N in image, determine that all touch points in image are true touch point; If total number of touch point is greater than N in image, sorted according to area order from big to small in the touch point of identifying, choose sequence in the touch point of top n as real touch point. The present invention also provides a kind of multiple point touching checkout gear. The embodiment of the present invention can accurately detect the multiple point touching on touch-screen.
Description
Technical field
The embodiment of the present invention relates to touching technique field, relates in particular to a kind of multipoint touch detection method and device.
Background technology
Along with the development of touching technique, touch-screen as one simply and easily human-computer interaction device be widely used. 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. at present. Wherein, infrared touch panel is to utilize the infrared grid of the various dimensions in X, Y-axis to locate touch point.
The touch point detection method of existing infrared touch panel, in the time only having a touch point, testing result is more accurate, but, in the time having multiple touch point, tend to occur erroneous judgement, because existing detection technique cannot accurately be identified real touch point and " terrible point ", this just causes testing result inaccurate. For above-mentioned reasons, the touch detection technical of existing infrared touch panel need to be used the occasion of multiple point touching to lose efficacy at some, and for example many people play simultaneously, drawing etc., great like this use field of having limited infrared touch panel.
Therefore, be necessary to provide a kind of new detection method, address the above problem.
Summary of the invention
The embodiment of the present invention provides a kind of multipoint touch detection method and device, can accurately detect the multiple point touching on touch-screen.
The multipoint touch detection method that the embodiment of the present invention provides, comprising: the colouring information that each scanning dimension on touch-screen is set; Read and calculate the data of blocking of each dimension scanning on described touch-screen, described in block data and comprise touch location and width, calculate the minimum touch point number N on touch-screen; Convert the touch location of each scanning dimension and width information to line segment with color and width, draw all line segments, form piece image; Obtained image is carried out to binary conversion treatment, identify position and the area of each touch point in image; If the number of touch point equals minimum touch point number N in image, determine that all touch points in image are true touch point; If total number of touch point is greater than the number N of minimum touch point in image, sorted according to area order from big to small in the touch point of identifying, choose sequence in the touch point of top n as real touch point.
The multiple point touching checkout gear that the embodiment of the present invention provides, comprising: module is set, for the colouring information of each scanning dimension on touch-screen is set; Computing module, for reading and calculate the data of blocking of each dimension scanning on described touch-screen, described in block data and comprise touch location and width, calculate the minimum touch point number N on touch-screen according to the described data of blocking; Image forming module, for converting the touch location of each scanning dimension and width information to line segment with color and width, draws all line segments, forms piece image; Image processing module, carries out binary conversion treatment for the image that described image forming module is formed, and identifies position and the area of each touch point in image; Judge module, for judging that the number of described image touch point is greater than or equals described minimum touch point number N; Determination module, for in the time that the number of described image touch point equals described minimum touch point number N, determine that all touch points in described image are true touch point, in the time that the number of touch point in described image is greater than described minimum touch point number N, sorted according to area order from big to small in the touch point of identifying, choose sequence in the touch point of top n as real touch point.
As can be seen from the above technical solutions, the embodiment of the present invention has the following advantages:
In embodiments of the present invention, by the data of blocking of each dimension scanning on touch-screen are processed, thereby obtain the area of each touch point, then according to the area of touch point order from big to small, sorted in identified touch point, elect the touch point of predetermined number forward sequence as real touch point, because " terrible point " has the advantages that area is less, therefore, the embodiment of the present invention can detect real touch point exactly.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is embodiment schematic diagram of multipoint touch detection method in the embodiment of the present invention;
Fig. 2 is color addition principle schematic in touch point in the embodiment of the present invention;
Fig. 3 is a partial schematic diagram of Fig. 2 touch point color addition principle;
Fig. 4 is embodiment schematic diagram of multiple spot Check processing in the embodiment of the present invention;
Fig. 5 is embodiment schematic diagram of multiple point touching checkout gear in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment. Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of multipoint touch detection method and device, can accurately detect the multiple point touching on touch-screen.
Refer to Fig. 1, in the embodiment of the present invention, embodiment of multipoint touch detection method comprises:
101, the colouring information of each scanning dimension on touch-screen is set;
In the present embodiment, can be according to horizontal and vertical each 3 dimensions, totally 6 dimensions arrange, and the color of each dimension can be set as RGB(0x80 successively, 0,0), RGB(0x40,0,0), RGB(0x20,0,0), RGB(0,0x80,0), RGB(0,0x40,0), RGB(0,0x20,0), real touch point color is necessary for RGB(0XE0,0XE0,0).
102, read and calculate the data of blocking of each dimension scanning on touch-screen, calculate the minimum touch point number N on touch-screen;
Read and calculate the data of blocking of each dimension scanning on touch-screen, block data and comprise touch location and width, calculate the number of blocking in data of blocking scanning in each dimension, calculate the minimum touch points N on touch-screen according to the number of blocking of blocking in each dimension in data.
103, convert the touch location of each scanning dimension and width information to line segment with color and width, draw all line segments, form piece image;
Wherein, the size of image can be set according to actual conditions, and image is larger, touches accuracy of detection higher, but corresponding processing speed is just slower.
104, this image is carried out to binary conversion treatment, identify position and the area of each touch point in image;
According to the color component of each pixel in image, image is carried out to binary conversion treatment, from image after treatment, identify the area of position and each touch point of each touch point.
105, judge that in image, the number of touch point is greater than or equals minimum touch point number N, if be greater than, perform step 106, if equal, perform step 107;
The minimum touch point number N that the touch point number that reality is identified and step 102 calculate compares, and in the touch point of identifying because of reality, may include " terrible point ", so the actual touch point number identifying is likely greater than N.
106, sorted according to area order from big to small in the touch point of identifying, choose sequence in the touch point of top n as real touch point;
In the time that the touch point number that reality identifies is greater than N, illustrates in identified touch point and include " terrible point ". Be the features such as bar shaped because " terrible point " has the little or shape of area, in the present embodiment, can sort according to area order from big to small to all touch points of identifying, choose sequence in the touch point of top n as real touch point.
107, determine that all touch points in image are true touch point.
In the time that the touch point number that reality identifies equals N, illustrate in identified touch point and do not contain " terrible point ", therefore, can determine that all touch points in image are true touch point.
In the present embodiment, by the data of blocking of each dimension scanning on touch-screen are processed, thereby obtain the area of each touch point, then according to the area of touch point order from big to small, sorted in identified touch point, elect the touch point of predetermined number forward sequence as real touch point, because " terrible point " has the advantages that area is less, therefore, the embodiment of the present invention can detect real touch point exactly.
For ease of understanding, the touch point color addition the principle below embodiment of the present invention being adopted describes, and specifically refers to Fig. 2.
In Fig. 2,207 is the positions at place, a real touch point, after on touch-screen, 207 places are touched, 208, the position at 209,210,211 places will have and block, and therefore, 208,209,210,211 these four positions will produce and disturb the detection of true touch point.
In order to detect true touch point, first, 6 scanning dimensions are set to the laggard line scanning of different colors, according to the longitudinally scanning of upper 3 dimensions, in figure, there are the corresponding data of blocking the position at 208 and 210 places in 201,202,203 3 dimensions; According to the transversely scanning of 3 dimensions, in figure, there are the corresponding data of blocking the position at 209 and 211 places in 204,205,206 3 dimensions; And all there are the corresponding data of blocking the position at 207 places in 201,202,203,204,205,206 6 dimensions.
The above-mentioned data of blocking comprise touch location and width, in the present embodiment, can convert the touch location of each scanning dimension and width information to line segment with color and width, on same position, draw the line segment of multiple color, the color of this position can be made as the stack of the color of all scanning dimensions that satisfy condition, and the scanning dimension that meets prerequisite is that this position has the corresponding scanning dimension of blocking data in this scanning dimension.
After the method drafting pattern picture providing according to the present embodiment, as shown in Figure 3, the color that color component is dimension 201,202,203,204,205,206 correspondences is contained at 207 places, the color component that 208 and 210 places are contained is the color of dimension 201,202,203 correspondences, and the color component that 209 and 211 places are contained is the color of dimension 204,205,206 correspondences.
Image is carried out to binary conversion treatment, be made as white by the pixel satisfying condition in image, the pixel satisfying condition is the pixel of the color component that contains 6 dimensions, and other pixels are made as to black.
The method providing according to this enforcement, image is carried out after binary conversion treatment, in Fig. 3,207 places will form white color lump, 208,209,210,211 places all convert black to, 208,209,210,211 this in binary conversion treatment process, will be filtered everywhere, therefore, can identify white color lump 207 is real touch point.
Illustrate above while only having a touch point, used the method that the embodiment of the present invention provides to detect the process touching, while introduction being had to multiple touch point below, used the method that the embodiment of the present invention provides to detect the process touching, referred to Fig. 4.
In Fig. 4,301 and 302 is two actual touch points, according to the region of being divided in Fig. 2,305 and 308 color components that contain 204,205,206 3 dimensions in Fig. 2,306 and 307 color components that contain 201,202,203 3 dimensions in Fig. 2, and 305 and 307 some overlapping region 303, the color component that contains 201,202,203,204,205,206 these 6 dimensions in 303,303 is likely true touch point. Same, 306 and 308 some overlapping region 304, also contain the color component of 201,202,203,204,205,206 these 6 dimensions so in 304, and 304 is likely also real touch point. This image, after binary conversion treatment, obtains 4 white color lumps, has four touch points, but 4 white color lump sizes there are differences, wherein, and 301 area maximums, 303 area minimums.
Known according to the touch data in read each dimension, in current 6 dimensions, touch point number is respectively 2,2,2,2,2,2, maximum is 2, gets maximum in the touch point number of all dimensions on touch-screen as minimum touch point number, and minimum touch point number is that N is 2. Due to currently identified go out touch point number be 4, be greater than minimum touch and count 2, therefore, in the touch point of identifying, there is " terrible point ".
In the present embodiment, can adopt the method that all white pixel point numbers in white color lump are added up to calculate the area of each white color lump. Because " terrible point " has the advantages that area is little, can preset an area according to actual conditions and filter threshold value, the white color lump that area in 4 white color lumps is less than to default threshold value first filters out. For example, in the present embodiment, the area of white color lump 303 is less than default threshold value, white color lump 303 is first filtered out. Remaining white is sorted according to area order from big to small, i.e. the area maximum of white color lump 301, next 302, be finally 304. Choose sequence at the white color lump of first 2 as real touch point, according to said method, can obtain 301 and 302 is two real touch points, and 303 and 304 be two " terrible points ".
In the present embodiment, by the data of blocking of each dimension scanning on touch-screen are processed, thereby obtain the area of each touch point, area is less than after the touch point filtration of default threshold value, sorted according to area order from big to small in remaining touch point, elect the touch point of predetermined number forward sequence as real touch point, because " terrible point " has the advantages that area is less, therefore, the embodiment of the present invention can detect real touch point exactly.
Below the multiple point touching checkout gear in the embodiment of the present invention is described, refers to Fig. 5, in the embodiment of the present invention, multiple point touching checkout gear embodiment comprises:
Module 501 is set, for the colouring information of each scanning dimension on touch-screen is set;
Computing module 502, for reading and calculate the data of blocking of each dimension scanning on described touch-screen, blocks data and comprises touch location and width, calculates the minimum touch point number N on touch-screen according to blocking data;
Image forming module 503, for converting the touch location of each scanning dimension and width information to line segment with color and width, draws all line segments, forms piece image;
Image processing module 504, carries out binary conversion treatment for the image that image forming module 503 is formed, and identifies position and the area of each touch point in image;
Judge module 505, for judging that the number of image touch point is greater than or equals described minimum touch point number N;
Determination module 506, for in the time that the number of image touch point equals minimum touch point number N, determine that all touch points in image are true touch point, in the time that the number of touch point in image is greater than minimum touch point number N, sorted according to area order from big to small in the touch point of identifying, choose sequence in the touch point of top n as real touch point.
For ease of understanding, with a practical application scene, the interactive mode between each module of the multiple point touching checkout gear in the present embodiment is described below:
In the present embodiment, module 501 is set can be by horizontal and vertical each 3 dimensions, and the color of totally 6 dimensions is set as RGB(0x80,0 successively, 0), RGB(0x40,0,0), RGB(0x20,0,0), RGB(0,0x80,0), RGB(0,0x40,0), RGB(0,0x20,0), real touch point color is necessary for RGB(0XE0,0XE0,0).
After module 501 be set set up the color of 6 dimensions, computing module 502 reads and calculates the data of blocking of each dimension scanning on touch-screen, block data and comprise touch location and width, calculate the number of blocking in data of blocking scanning in each dimension, calculate the minimum touch points N on touch-screen according to the number of blocking of blocking in each dimension in data.
For example, the number of blocking of blocking in data scanning in 6 dimensions is followed successively by 4,4,6,4,4,4, gets the value 6 of blocking number maximum in 6 dimensions as the minimum points N that touches, and, in the present embodiment, N equals 6.
Touch location and the width information of each scanning dimension that image forming module 503 reads computing module 502 convert the line segment with color and width to, on same position, draw the line segment of multiple color, the color of this position is made as to the stack of the color of all scanning dimensions that satisfy condition, the scanning dimension that meets prerequisite is that this position has the corresponding scanning dimension of blocking data in this scanning dimension. Wherein, the size of image can be set according to actual conditions, and image is larger, touches accuracy of detection higher, but corresponding processing speed is just slower.
The image that image processing module 504 forms image forming module 503 carries out binary conversion treatment, identifies position and the area of each touch point in image. Particularly, the pixel satisfying condition in image is made as white by image processing module 504, the pixel satisfying condition is the pixel of the color component that contains 6 dimensions, other pixels are made as to black, all white pixels finally form the different white color lump of area, and the number of white color lump represents the number of all touch points of identifying.
Judge module 505 judges that the number of the image processing module 504 final white color lumps that form is greater than or equals the minimum points N that touches.
According to example above, touching points N if minimum is 6, and the number of the white color lump identifying is 8, and the number of white color lump is greater than minimum touch counts, and contains " terrible point " in the touch point identified. Now, determination module 506 need to be determined final 8 the white color lumps that form of image processing module 504 area separately, in the present embodiment, determination module 506 can adopt the area that all white pixel point numbers in each white color lump is carried out to cumulative method and calculated each white color lump.
Because " terrible point " has the advantages that area is little, determination module 506 can preset an area according to actual conditions and filter threshold value, the white color lump that area in 8 white color lumps is less than to default threshold value first filters out, then remaining white color lump is sorted according to area order from big to small, choose sequence at the white color lump of first 6 as real touch point, remaining white color lump representative " terrible point ".
In the present embodiment, image processing module carries out binary conversion treatment by the image that image forming module is formed, thereby obtain the area of each touch point, determination module is less than area after the touch point filtration of default threshold value, sorted according to area order from big to small in remaining touch point, elect the touch point of predetermined number forward sequence as real touch point, because " terrible point " has the advantages that area is less, therefore the multiple point touching checkout gear that, the embodiment of the present invention provides can detect real touch point exactly.
It should be noted that in addition, device embodiment described above is only schematic, the wherein said unit as separating component explanation can or can not be also physically to separate, the parts that show as unit can be or can not be also physical locations, can be positioned at a place, or also can be distributed on multiple NEs. Can select according to the actual needs some or all of module wherein to realize the object of the present embodiment scheme. In addition, in device embodiment accompanying drawing provided by the invention, the annexation between module represents to have communication connection between them, specifically can be implemented as one or more communication bus or holding wire. Those of ordinary skill in the art, in the situation that not paying creative work, are appreciated that and implement.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add essential common hardware by software and realize, and can certainly comprise that special IC, dedicated cpu, private memory, special components and parts etc. realize by specialized hardware. generally, all functions being completed by computer program can realize with corresponding hardware easily, and the particular hardware structure that is used for realizing same function can be also diversified, such as analog circuit, digital circuit or special circuit etc. but software program realization is better embodiment under more susceptible for the purpose of the present invention condition. based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium can read, as the floppy disk of computer, USB flash disk, portable hard drive, read-only storage (ROM, Read-OnlyMemory), random access memory (RAM, RandomAccessMemory), magnetic disc or CD etc., comprise that some instructions (can be personal computers in order to make a computer equipment, server, or the network equipment etc.) carry out the method described in the present invention each embodiment.
A kind of multipoint touch detection method and the device that above the embodiment of the present invention are provided are described in detail, for one of ordinary skill in the art, according to the thought of the embodiment of the present invention, all will change in specific embodiments and applications, therefore, this description should not be construed as limitation of the present invention.
Claims (9)
1. a multipoint touch detection method, is applied to infrared touch panel, it is characterized in that, comprises step:
1) colouring information of each scanning dimension on touch-screen is set;
2) read and calculate the data of blocking of each dimension scanning on described touch-screen, described in block packetDraw together touch location and width, calculate the minimum touch point number N on touch-screen, on described calculating touch-screenMinimum touch point number N be specially: get the maximum in the touch point number of all dimensions on touch-screenAs minimum touch point number;
3) convert the touch location of each scanning dimension and width information to line with color and widthSection, draws all line segments, forms piece image;
4) to step 3) image that obtains carries out binary conversion treatment, identifies each touch point in imagePosition and area, if the number N that in image, total number of touch point is greater than minimum touch point carries outStep 5); If the number of touch point equals minimum touch point number N in image, determine the institute in imageThere is touch point to be true touch point;
5) by step 4) touch point identified sorts according to area order from big to small, choosesSequence in the touch point of top n as real touch point.
2. the method for claim 1, is characterized in that, described step 3) in formation imageMode be: on same position, draw the line segment of multiple color, the color of this position be made as meet presetThe stack of the color of all scanning dimensions of condition, the scanning dimension that meets prerequisite is that described position existsIn described scanning dimension, there is the corresponding scanning dimension of blocking data.
3. the method for claim 1, is characterized in that, described step 4) in image two-valueChanging processing mode is: the pixel satisfying condition is made as to white, described in the pixel that satisfies condition for containingIn steps 1) pixel of default all colours information, is made as black by other pixels.
4. method as claimed in claim 3, is characterized in that, described step 5) middle true touch pointChoosing method be: by the white color lump that formed by the pixel satisfying condition according to area from big to smallOrder sorts, choose sequence at the white color lump of top n as real touch point.
5. method as claimed in claim 4, is characterized in that, the area of described white color lump is whiteAll white pixel point number sums in color lump.
6. method as claimed in claim 4, is characterized in that, described by institute's adularescent color lump according to faceBefore long-pending order from big to small sorts, also comprise:
Filter area is less than the white color lump of default threshold value.
7. a multiple point touching checkout gear, is applied to infrared touch panel, it is characterized in that, comprising:
Module is set, for the colouring information of each scanning dimension on touch-screen is set;
Computing module, blocks data, institute for what read and calculate each dimension scanning on described touch-screenState and block data and comprise touch location and width, block the minimum that data calculate on touch-screen and touch according to describedTouch a number N, blocking data described in described basis, to calculate minimum touch point number N on touch-screen concreteFor: get maximum in the touch point number of all dimensions on touch-screen as minimum touch point number;
Image forming module, for the touch location of each scanning dimension and width information are converted toThe line segment of color and width, draws all line segments, forms piece image;
Image processing module, carries out binary conversion treatment for the image that described image forming module is formed,Identify position and the area of each touch point in image;
Judge module, for judging that the number of described image touch point is greater than or equaling described minimum touchesTouch a number N;
Determination module, equals described minimum touch point number N for the number when described image touch pointTime, determine that all touch points in described image are true touch point, when touch point in described imageWhen number is greater than described minimum touch point number N, by the touch point of identifying according to area from big to smallOrder sorts, choose sequence in the touch point of top n as real touch point.
8. device as claimed in claim 7, is characterized in that, described image processing module is to described figureThe mode that picture carries out binary conversion treatment is:
The pixel satisfying condition is made as to white, described in the pixel that satisfies condition for containing, module is setThe pixel of all colours information arranging, is made as black by other pixels.
9. device as claimed in claim 8, is characterized in that, described determination module is in described imageThe method of determining true touch point when the number of touch point is greater than described minimum touch point number N is:
The white color lump being formed by the pixel satisfying condition is arranged according to area order from big to smallOrder, choose sequence at the white color lump of top n as real touch point, the area of described white color lumpFor all white pixel point number sums in white color lump.
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| CN105094459B (en) * | 2015-03-20 | 2018-11-02 | 淮阴工学院 | A kind of optics multi-point touch locating method |
| CN105068686B (en) * | 2015-08-05 | 2018-03-16 | Tcl移动通信科技（宁波）有限公司 | The damage detection method and its device of a kind of touch-screen |
| CN106502476B (en) * | 2016-11-04 | 2019-10-01 | 青岛海信电器股份有限公司 | Multi-touch of infrared touch screen recognition methods and device |
| WO2021102677A1 (en) * | 2019-11-26 | 2021-06-03 | 深圳市欢太科技有限公司 | Touch response method, touch screen system, terminal, storage medium, and chip |
| CN113495641A (en) * | 2020-04-07 | 2021-10-12 | 宇龙计算机通信科技(深圳)有限公司 | Touch screen ghost point identification method and device, terminal and storage medium |
| CN113158441A (en) * | 2021-03-31 | 2021-07-23 | 胜达克半导体科技(上海)有限公司 | Method for improving signal grabbing precision in chip tester |
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| CN102419662A (en) * | 2011-06-13 | 2012-04-18 | 北京汇冠新技术股份有限公司 | Multipoint identification method and system for infrared touch screen |
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| CN102053757B (en) * | 2009-11-05 | 2012-12-19 | 上海精研电子科技有限公司 | Infrared touch screen device and multipoint positioning method thereof |
| TWI450154B (en) * | 2010-09-29 | 2014-08-21 | Pixart Imaging Inc | Optical touch system and object detection method therefor |
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| CN101403951A (en) * | 2008-08-11 | 2009-04-08 | 广东威创视讯科技股份有限公司 | Multi-point positioning device and method for interactive electronic display system |
| CN102023760A (en) * | 2010-12-01 | 2011-04-20 | 广州市迪拓信息科技有限公司 | Multi-point touch sensing method and equipment |
| CN102419662A (en) * | 2011-06-13 | 2012-04-18 | 北京汇冠新技术股份有限公司 | Multipoint identification method and system for infrared touch screen |
| CN102419663A (en) * | 2011-08-03 | 2012-04-18 | 北京汇冠新技术股份有限公司 | Multipoint identification method and system for infrared touch screen |
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