WO2012171457A1 - 一种红外触摸屏的多点识别方法及系统 - Google Patents
一种红外触摸屏的多点识别方法及系统 Download PDFInfo
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- WO2012171457A1 WO2012171457A1 PCT/CN2012/076815 CN2012076815W WO2012171457A1 WO 2012171457 A1 WO2012171457 A1 WO 2012171457A1 CN 2012076815 W CN2012076815 W CN 2012076815W WO 2012171457 A1 WO2012171457 A1 WO 2012171457A1
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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
- 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
Definitions
- the invention relates to a method and a system for identifying touch points of a touch screen, in particular to a multi-point recognition method and system for an infrared touch screen based on image processing. Background technique
- touch screens have been widely used as a simple and convenient human-computer interaction device.
- the types of touch screens mainly include resistive touch screens, capacitive touch screens, surface acoustic wave touch screens, optical touch screens, and infrared touch screens.
- the infrared touch screen uses an infrared matrix densely arranged in the X and Y directions to detect and locate the user's touch operation.
- the infrared touch screen is provided with a circuit board outer frame on the front side of the display.
- the circuit board arranges the infrared transmitting tube and the infrared receiving tube on the four sides of the screen, and one-to-one correspondingly forms an infrared matrix which is horizontally and vertically crossed.
- the touch object such as a finger blocks the two infrared rays passing through the position, so that the position of the touch point on the screen can be judged. Since the infrared touch screen has advantages of being free from current, voltage and static electricity, and is suitable for harsh environmental conditions, the infrared touch screen has a wide application range.
- the method of identifying touch points on an infrared touch screen has gone through a process of recognizing one point to identifying two points and then identifying more points.
- Multi-point (more than two points) recognition will inevitably become the trend of infrared touch screens, because multi-touch can not only display more dazzling display effects, but also achieve more touch functions.
- the two-point identification method of the infrared touch screen is basically mature at present, and the key step in the recognition process is to remove ghost points, which are non-real touch points recognized on the infrared touch screen.
- the method of logically judging can be used to remove ghost points. For example, according to the distance relationship between each corresponding quasi-touch point set in two (or more) logical screens (a subset of the set of optical paths obtained in one scan), the real Touch the point. The theoretical basis is that the real point has a small deviation in the scan results of each logical screen, and the ghost point deviation is large. This method of removing ghost points is simple and easy to implement, and the calculation amount is small, and the ability to remove ghosts is strong.
- the technical problem to be solved by the present invention is to provide a multi-point recognition method and system for an infrared touch screen based on image processing.
- the technical solution adopted by the present invention is as follows:
- a multi-point identification method for an infrared touch screen includes the following steps:
- Touch point information is extracted in the optical path image.
- the multi-point identification method of the infrared touch screen as described above, wherein the method for generating the optical path image is as follows: collecting optical path data of the infrared touch screen in one recognition process;
- the multi-point recognition method of the infrared touch screen wherein the method of extracting the touch point information is as follows:
- the center coordinates and the contour area of each contour are calculated based on the contour information, and the center coordinates are used as touch point coordinates, and the contour area is used as a touch point area.
- the multi-point recognition method of the infrared touch screen wherein the method of extracting the touch point information is as follows:
- the center coordinates of the contour are calculated based on the contour information, and the center coordinates are used as touch point coordinates, and the contour area is used as a touch point area.
- the multi-point identification method of the infrared touch screen as described above, wherein the method of the denoising process is as follows: performing the N-th etching operation continuously on the optical path image; or performing P-first etching and post-expansion operation on the optical path image first, and then The ⁇ -corrosion operation is further performed, and the ⁇ -expansion operation is performed.
- the multi-point recognition method of the infrared touch screen as described above further includes the step of removing the ghost points according to the mutual relationship between the touch point information. Specifically, if one touch point area is smaller than one-half of the area of the touch area with the smallest area among the other touch points, the touch point is considered to be a ghost point, and is removed.
- the multi-point recognition method of the infrared touch screen as described above in a single recognition process, it is first determined whether there is a touch point on the infrared touch screen according to the optical path data; if there is no touch point, the current recognition is ended.
- the area where the touch point is located is first determined according to the optical path data; if there is the touch point area, the area corresponding to the touch point is generated corresponding to the optical path in the area The light path image; if there is no touch point area, the current recognition is ended.
- the multi-point recognition method of the infrared touch screen as described above in a recognition process, first according to the light
- the road data determines whether there is a touch point on the infrared touch screen; if there is a touch point, it continues to determine the area where the touch point is located according to the optical path data, and generates an optical path image corresponding to the optical path in the area in the area where the touch point is located, and then performs subsequent Recognition processing; if there is no touch point, this identification is ended.
- a multi-point recognition system for an infrared touch screen comprising: an optical path image generating device for generating an optical path image corresponding to all optical paths of the infrared touch screen in one recognition process; and a touch for extracting touch point information in the optical path image Point information extraction device.
- the multi-point recognition system of the infrared touch screen as described above, wherein the optical path image generating device includes an acquisition unit for collecting optical path data of the infrared touch screen in one recognition process; and configured to generate an initial optical path image that is preset to a size of the infrared touch screen.
- the initial optical path image generating unit is configured to determine, according to the optical path data, whether each optical path is occluded, and if the optical path is not occluded, generate a line segment corresponding to the optical path at a corresponding position of the initial optical path image according to the preset ratio.
- the optical path corresponds to the line segment generating unit.
- the multi-point recognition system of the infrared touch screen as described above, wherein the touch point information extraction device includes a denoising unit for performing denoising processing on the optical path image, and the processed image is recorded as an image for segmenting the image A.
- a segmentation extracting unit that extracts a touch point contour and records each contour information; a calculating unit that calculates a center coordinate of each contour based on the contour information.
- the multi-point recognition system of the infrared touch screen as described above further includes a ghost point removing device for removing ghost points according to the mutual relationship between the touch point information after the touch point information is extracted.
- the multi-point recognition system of the infrared touch screen as described above further comprising touch point area determining means for determining an area where the touch point is located according to the optical path data; the light path image generating means is configured to generate the area with the touch point The optical path image corresponding to the Zhongguang Road.
- the multi-point recognition system of the infrared touch screen as described above further includes pre-determination means for determining whether there is a touch point on the infrared touch screen based on the optical path data.
- the multi-point recognition system of the infrared touch screen as described above, further comprising: a pre-determination device for determining whether there is a touch point on the infrared touch screen according to the optical path data; a touch point region determining device for determining an area where the touch point is located according to the optical path data; The optical path image generating device is configured to generate an optical path image corresponding to the optical path in the region in the region where the touch point is located.
- the invention provides a novel multi-point recognition method and system for infrared touch screen based on image processing, which is suitable for the recognition of any plurality of touch points, and has high recognition accuracy, no ghost points or few ghost points.
- the optical path global information is used, so it has better robustness and anti-noise performance than other local optical path-based logic judgments, even if a few optical paths are not correct (such as optical path not being able to block or Under the condition that the optical path is lost, the correct touch point information can still be obtained. Since the denoising process is performed on the boundary portion of the target area, the influence on the position of the touched point is small; and the true shape of the touched point area can be restored, and the touch point obtained finally has high precision.
- FIG. 1 is a structural block diagram of a multi-point identification system of an infrared touch screen in Embodiment 1;
- Embodiment 2 is a flow chart of a multi-point identification method of the infrared touch screen in Embodiment 1;
- Embodiment 3 is a flow chart showing a method of generating an optical path image in Embodiment 1;
- Embodiment 4 is a flow chart of a method for extracting touch point information in Embodiment 1;
- Figure 5 is a schematic diagram of an optical path image in Embodiment 1;
- FIG. 6 is a first schematic diagram showing the effect of denoising the optical path image shown in FIG. 5 in FIG. 1;
- FIG. 7 is a second schematic diagram showing the effect of denoising the optical path image shown in FIG. 5 in the first embodiment;
- FIG. 9 is a schematic diagram showing the effect of extracting and extracting the image shown in FIG. 7;
- FIG. 9 is a schematic diagram showing the effect of extracting touch point information from the image shown in FIG. 8 in Embodiment 1;
- FIG. 10 is an infrared touch screen of Embodiment 2.
- Figure 11 is a schematic view showing an initial optical path image in Embodiment 2.
- Figure 12 is a schematic view showing the principle of optical path reverse pushing in Embodiment 2;
- Figure 13 is a schematic view showing an optical path image in Embodiment 2.
- 14 and 15 are block diagrams showing the structure of a multi-point recognition system of the infrared touch screen in the third embodiment. detailed description
- This embodiment provides a multi-point identification system for an infrared touch screen.
- the system includes an optical path image generating device 11 and a touch point information extracting device 12.
- the optical path image generating device 11 includes an acquisition unit 111, an initial optical path image generating unit 112, and an optical path corresponding line segment generating unit 113.
- the touch point information extracting device 12 includes a denoising unit 121, a segmentation extracting unit 122, and a calculating unit 123.
- the optical path image generating device 11 is for generating an optical path image P corresponding to the optical path of the infrared touch panel in one recognition process.
- the collecting unit 111 is configured to collect optical path data of the infrared touch screen in a single recognition process;
- the initial optical path image generating unit 112 is configured to generate an initial optical path image ⁇ that is at a preset ratio M to the infrared touch screen size, and store the initial optical path image to The image storage area, the initial optical path image may be a pure white or pure black image;
- the optical path corresponding line segment generating unit 113 is configured to determine whether each optical path is blocked according to the optical path data, and if the optical path is not blocked, according to a preset ratio ⁇ in the image storage A corresponding line of the initial optical path image in the area generates a line segment corresponding to the optical path to obtain an optical path image ⁇ .
- the touch point information extracting means 12 is for extracting touch point information in the optical path image .
- the denoising unit 121 is configured to perform denoising processing on the optical path image ,, remove noise in the optical path image ,, and record the processed image as an image.
- the segmentation extracting unit 123 is configured to segment the image and extract the touch point contour. And calculating the contour information; the calculating unit 124 calculates the center coordinates and the contour area of each contour according to the contour information, and uses the center coordinates as the touch point coordinates and the contour area as the touch point area.
- the system further includes a ghost point removing device (not shown in FIG. 1) for removing ghost points that may exist in the touched point according to the mutual relationship between the touched point information after the touch point information is extracted.
- a ghost point removing device (not shown in FIG. 1) for removing ghost points that may exist in the touched point according to the mutual relationship between the touched point information after the touch point information is extracted.
- the method for implementing multi-point identification in a recognition process in the embodiment includes the following steps:
- the optical path image generating device 11 generates an optical path image ⁇ (201) corresponding to the optical path of the infrared touch panel in one recognition process.
- the specific generation process includes the following steps:
- the collecting unit 111 collects the optical path data (2011) of the infrared touch screen in one recognition process.
- the initial optical path image generating unit 112 generates an initial optical path image (2012) which is preset to a size of the infrared touch screen.
- the size of the touch screen and the size of the optical path image can be any ratio, and can be set according to the specific application environment. Preferably, it is 1 : 1, such that the coordinates of the optical path on the touch screen and the coordinates of the corresponding line segment of the optical path in the optical path image need not be converted.
- the background color of the optical path image and the color of the corresponding line segment of the optical path should be different, and it is preferable to use two colors with strong contrast.
- the background color is white
- the color path corresponding to the line segment is black
- the initial light path image is an all-white image.
- Coordinate transformation is required when generating the corresponding line segment of the optical path.
- the starting point coordinate of the optical path is ( , y)
- the starting point coordinate of the corresponding line segment of the optical path is ( ', )
- / ' m/n
- the end point coordinates of the corresponding line segment of the optical path can be calculated, and the line segment corresponding to the optical path generated by the start point and the end point is connected.
- the generated optical path image 3 is as shown in FIG.
- the touch point information extracting means 12 extracts touch point information in the optical path image P, as shown in FIG. 4, specifically the extraction process includes the following steps:
- the denoising unit 121 performs denoising processing on the optical path image P to remove noise in the optical path image P, and records the processed image as an image (2021).
- the denoising method may adopt a morphological method, and the present invention does not limit the specific denoising method as long as the noise in the optical path image can be removed.
- This embodiment provides the following two specific methods for denoising: a. Continuously performing three etching operations on the optical path image P, and using a 3x3 circular template for the etched structural elements, and the obtained optical path image effect is as shown in FIG. 6. As can be seen from Figure 6, the image of the denoised optical path is still rough, but it is sufficient for subsequent processing.
- the 2-segment extraction unit 122 performs segmentation processing on the image ⁇ , extracts the segmented touch point contours, and records each contour information (2022), the contour information including the contour point coordinates, that is, the coordinate set of the points on the contour edge. If the touch point outline is not extracted, it means that no touch point exists, and this recognition is ended.
- Process P a divided image is segmented from the image P a communication area in white, as a candidate touch point.
- the connected area smaller than the set area may be directly deleted as a ghost point, or may be reserved for subsequent processing, wherein the set area is determined according to a specific application environment.
- the candidate touch points at this time are basically true touch points, but the existence of individual ghost points is not excluded. Individual ghost points can be removed by logical judgment, or they can be allowed to exist, and will not affect the recognition result of subsequent touch operations.
- the calculation unit 123 calculates the center coordinates and the contour area (2023) of each contour based on the contour information, using the center coordinates as the touch point coordinates and the contour area as the touch point area.
- the center coordinates of the contour can be calculated by, but not limited to, the following methods: 1 Calculate the average of all the contour point coordinates of the record, and use the average value as the center coordinate of the contour; 2 Calculate the average of the coordinates of all points in the contour, The average value is taken as the center coordinate of the contour, and the coordinates of all the points in the contour can be obtained by the coordinates of the contour edge points. Obviously, the center coordinates calculated using the coordinates of all points in the contour are more accurate.
- the contour area can be calculated by, but not limited to, the following method: 1 Calculate the area of the circumscribed rectangle of the contour, and use the area as the contour area; 2 Calculate the number of points contained in the contour, and use the number as Contour area. Obviously, the contour area calculated by the second method is more accurate.
- the ghost point removing device removes the ghost point according to the mutual relationship between the touch point information. For example, if one touch point area is smaller than one-half of the area of the touch area with the smallest area among the other touch points, the touch point is considered to be a ghost point and is removed. Other ways of judging can also be used to remove ghost points.
- the touch point coordinates acquired at this time are the coordinates on the optical path image, and if necessary, the coordinates can be converted into touch screen coordinates according to the size ratio of the touch screen and the size ratio of the optical path image.
- the system recognizes the touch point in a recognition process between 24ms and 26ms (the maximum time is more than 20ms for 20ms and 5ms for 24ms).
- each step is to process the entire optical path image. Since the approximate position of each touch point area can be quickly obtained by the initial optical path data, the rough area set of the touch point can be obtained first, and subsequent operations are performed only for these areas. This processing speed is greatly improved, but the basic idea is the same as that of Embodiment 1.
- the specific process is as follows:
- an initial optical path image is generated which is at a preset ratio M to the infrared touch screen size, and the initial optical path image is a background.
- the background color is black.
- a rough area of candidate touch points is calculated based on the optical path data, which is approximately a rectangular area.
- the system of the present embodiment adds a touch point area determining device 101 based on the first embodiment, as shown in FIG. These areas are initialized to white and touch points will be generated in these areas. If the candidate touch point area is not obtained after calculation based on the optical path data, it means that no touch point exists, and the current recognition is ended.
- the initial optical path image when there are five touch points is as shown in FIG.
- the rectangular, circular, and diamond-shaped targets represent touch-point regions of different sizes and shapes.
- the starting and ending optical paths through the object are obtained by back-twisting (the left optical path represents the starting optical path, right
- the side light path represents the end of the light path).
- the left optical path represents the starting optical path
- right The side light path represents the end of the light path.
- the line segments corresponding to the optical paths in the left and right ranges are determined. From Figure 12 It can be seen that part of the optical path passing through the rectangular area also passes through the circular area at the same time. In order to avoid repeated generation, the optical paths of all areas are combined (that is, the same optical path generates only the corresponding line segment once).
- the optical path image generated by the above-described initial optical path image shown in Fig. 11 is as shown in Fig. 13.
- the subsequent processing is basically the same as that of the first embodiment, except that the first embodiment is to process the entire optical path image, and the present embodiment processes only the optical path image of the touched point region.
- the present embodiment adds a pre-judgment device 141 based on the first embodiment or the second embodiment for predetermining the presence or absence of a touch point based on the optical path data. Any method in the prior art can be used for the method of judging, and details are not described herein again.
- the pre-judging means 141 judges whether or not there is a touched point based on the optical path data. If there is no touch point, the current recognition is ended; if there is a touch point, the touch point is identified by the method of Embodiment 1 or Embodiment 2. This avoids unnecessary recognition processing and improves recognition efficiency. It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of the inventions
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CN2011101570530A CN102419662A (zh) | 2011-06-13 | 2011-06-13 | 一种红外触摸屏的多点识别方法及系统 |
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CN102419662A (zh) * | 2011-06-13 | 2012-04-18 | 北京汇冠新技术股份有限公司 | 一种红外触摸屏的多点识别方法及系统 |
CN103399674B (zh) * | 2013-08-01 | 2016-05-18 | 广东威创视讯科技股份有限公司 | 一种多点触摸检测方法及装置 |
CN103984449B (zh) * | 2014-05-30 | 2019-01-18 | 湖州佳格电子科技股份有限公司 | 一种触摸屏触摸区域定位方法 |
CN105094459B (zh) * | 2015-03-20 | 2018-11-02 | 淮阴工学院 | 一种光学多点触摸定位方法 |
CN106896966A (zh) * | 2017-03-15 | 2017-06-27 | 青岛海信电器股份有限公司 | 红外触摸屏中触点位置和形状信息存储的方法和装置 |
CN110083272B (zh) * | 2019-05-06 | 2023-07-07 | 深圳市康冠商用科技有限公司 | 一种红外触摸框的触摸定位方法及相关装置 |
CN113495641A (zh) * | 2020-04-07 | 2021-10-12 | 宇龙计算机通信科技(深圳)有限公司 | 触摸屏鬼点识别方法、装置、终端及存储介质 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101145091A (zh) * | 2007-11-01 | 2008-03-19 | 复旦大学 | 基于红外线摄像的触摸屏及其定位检测方法 |
CN101727245A (zh) * | 2008-10-15 | 2010-06-09 | 北京京东方光电科技有限公司 | 多点触摸定位方法及多点触摸屏 |
US20100277437A1 (en) * | 2009-04-30 | 2010-11-04 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd | Electronic device and controlling method thereof |
CN102419662A (zh) * | 2011-06-13 | 2012-04-18 | 北京汇冠新技术股份有限公司 | 一种红外触摸屏的多点识别方法及系统 |
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101145091A (zh) * | 2007-11-01 | 2008-03-19 | 复旦大学 | 基于红外线摄像的触摸屏及其定位检测方法 |
CN101727245A (zh) * | 2008-10-15 | 2010-06-09 | 北京京东方光电科技有限公司 | 多点触摸定位方法及多点触摸屏 |
US20100277437A1 (en) * | 2009-04-30 | 2010-11-04 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd | Electronic device and controlling method thereof |
CN102419662A (zh) * | 2011-06-13 | 2012-04-18 | 北京汇冠新技术股份有限公司 | 一种红外触摸屏的多点识别方法及系统 |
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