Touch recognition method and touch recognition system for infrared touch screen
An infrared touch screen, quasi-touch technology, applied in the input/output process of data processing, instruments, electrical and digital data processing and other directions, can solve problems such as judging ghost points, and achieve the effect of improving speed
Active Publication Date: 2014-07-02
BEIJING IRTOUCH SYST CO LTD
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[0005] What the present invention aims to solve is the technical problem that ghost points cannot be effectively judged by the size of the distance deviation between quasi-touch point areas when there are multiple quasi-touch points on the infrared touch screen in the prior art, thereby providing a touch recognition method for infrared touch screens. method and system
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[0042] A kind of touch recognition method for infrared touch screen, see figure 1 As shown, the specific implementation includes the following steps:
[0043] First, according to the scan data, a quasi-touch point area is acquired, and position information and size information of the quasi-touch point area are acquired.
[0044] Since the touch points all have a certain size, the quasi-touch points (including real touch points and ghost points) obtained according to the occlusion of scan lines in the scan data are actually an area, and the method for obtaining the quasi-touch point area can be Using any one of the prior art, such as the method of generating an optical path image or a two-dimensional array according to the scan data, and then obtaining the quasi-touch point area through contour extraction, such as the methods mentioned in Chinese patent documents CN102419662A, CN102419664A and CN102419663A, also The horizontal and vertical boundaries can be obtained through th...
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The invention provides a touch recognition method and a touch recognition system for an infrared touch screen. The touch recognition method includes steps of acquiring position information and size information of all quasi-touch point regions; acquiring position information of all blocking lines of a data frame; acquiring position relations among the blocking lines and the quasi-touch point regions; computing the number of corresponding blocking lines which are blocked by each certain quasi-touch point region but are not blocked by the other quasi-touch point regions; judging whether each certain quasi-touch point region is a ghost point region or not. The touch recognition method and the touch recognition system have the advantages that on account of a principle that multiple points can be certainly blocked by one another when a user touches the multiple points, characteristics of the infrared touch screen and ghost point forming reasons are considered, accordingly the technical problem of incapability of effectively judging ghost points by the aid of the magnitude of deviation of distances among quasi-touch point regions when a user touches a plurality of touch points of an existing infrared touch screen can be solved by the aid of the mathematical statistical analysis method.
Description
technical field [0001] The invention relates to a method and system for touch recognition of an infrared touch screen, belonging to the technical field of infrared 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. 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 the circuit board is arranged with infrared emitting tubes and infrared receiving tubes on the four sides of the screen. One-to-one correspondence forms a criss-cross infrared matrix. When the user touches the screen, the touc...
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IPC IPC(8): G06F3/042
Inventor 刘云龙满庆奎刘新斌
Owner BEIJING IRTOUCH SYST CO LTD