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Touch identification method and system for infrared touch screen

A technology of infrared touch screen and identification method, which is applied in the input/output process of data processing, instruments, electrical and digital data processing, etc., can solve the problems of long processing time and slow response speed, improve the recognition speed and reduce the processing area. effect of reducing the number of light paths

Active Publication Date: 2014-10-29
BEIJING IRTOUCH SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is the problem of long processing time and slow response speed of the touch recognition method of the infrared touch screen in the prior art, so as to provide a touch recognition method and system of the infrared touch screen with improved recognition speed

Method used

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  • Touch identification method and system for infrared touch screen
  • Touch identification method and system for infrared touch screen
  • Touch identification method and system for infrared touch screen

Examples

Experimental program
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Effect test

Embodiment 1

[0062] A kind of identification method that is used for infrared touch screen of this embodiment, its flow chart is as follows figure 1 As shown, the specific implementation includes the following steps:

[0063] S1: Collect all scanning light paths under no-touch conditions to form an initial light path image. Specific steps are as follows:

[0064] S11: Generate a background image with a preset ratio to the size of the touch screen, and the color of the background image is a single color. Such as figure 2 As shown, the color of the background image is set to black.

[0065] The size of the touch screen and the size of the background image can be in any ratio, which is set by the user according to the specific application environment. In this embodiment, the preset ratio is 1:1, so that the coordinates of the optical path on the touch screen and the corresponding coordinates of the light path in the background image do not need to be converted.

[0066] As another imple...

Embodiment 2

[0085] In this embodiment, different from the above-mentioned embodiment 1, in step S6 of this embodiment, for each of the acquired possible occlusion areas, each of the possible occlusion areas from the initial optical path image The scanning optical path that is blocked within is processed, and the other scanning optical paths are not processed. Specifically, the steps for acquiring a scanning optical path image in the presence of a touching object are as follows:

[0086] S521. For each of the obtained possible occlusion areas, traverse each pixel, and count the number of light paths passing through each pixel, and the light paths passing through each pixel include a blocked light path and an unblocked light path; this implementation In this example, a linear rasterization algorithm is used to determine which pixels the scanning light path passes through in the possible occlusion area.

[0087] S522. For each pixel, subtract the number of blocked light paths passing through...

Embodiment 3

[0090] In this embodiment, on the basis of the above-mentioned embodiments, the step S4 further includes the step of aggregating the possible occlusion areas, and the specific method is:

[0091] When a shading optical path passes through at least the two longitudinal shading areas at the same time, for each of the longitudinal shading areas, compare the distance between the longitudinal shading area and the other longitudinal shading areas that the same shading optical path passes through, if the vertical shading The distance of the area is less than the preset vertical threshold, then aggregated into the same vertical occlusion area;

[0092] When a shading optical path passes through at least the two lateral shading areas at the same time, for each of the lateral shading areas, compare the distance between the lateral shading area and the other lateral shading areas that the same shading optical path passes through, if the lateral shading If the distance of the regions is s...

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Abstract

The invention provides a touch identification method and system for an infrared touch screen. The touch identification method includes the steps of firstly finding possible shielding areas of touch points in the whole infrared touch screen, and processing shielded scanning light paths in the possible shielding areas from an initial light path image to accordingly obtain the touch points. By means of the touch identification method and device, not all scanning light paths or not all pixels in the infrared touch screen need to be processed, the processing speed is greatly increased, and the problem that as for scanning based on each light path or each pixel in the prior art, each light path or each pixel needs to be processed to obtain the touch points, and therefore the processing speed is influenced and is low is effectively solved.

Description

technical field [0001] The invention relates to a touch point recognition method of a touch screen, in particular to a touch point recognition method and system for improving processing speed, and belongs to the technical field of touch screen control. Background technique [0002] With the development of touch technology, touch screens are widely used as a simple and convenient human-computer interaction device. Currently, 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. Among them, the infrared touch screen uses the infrared matrix densely distributed in the X and Y directions to detect and locate the user's touch operation. A circuit board frame is installed around the infrared touch screen, and infrared emitting tubes and infrared receiving tubes are arranged on the circuit board frame. One-to-one correspondence forms an infrared matrix tha...

Claims

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Application Information

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IPC IPC(8): G06F3/042
Inventor 满庆奎刘新斌管健
Owner BEIJING IRTOUCH SYST CO LTD
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