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A gesture recognition method and system based on multi-touch

A multi-touch and gesture recognition technology, applied in the field of multi-touch-based gesture recognition, achieves the effects of small calculation amount, low R&D cost, and high execution efficiency

Active Publication Date: 2017-02-08
BEIJING IRTOUCH SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to identify single-hand touch or two-hand touch in the prior art, using complex scanning methods and data processing to affect the response speed of the infrared touch screen, thereby providing a simple approach to approximate the touch of each hand as a single Point touch gesture recognition method and system based on multi-touch

Method used

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  • A gesture recognition method and system based on multi-touch
  • A gesture recognition method and system based on multi-touch
  • A gesture recognition method and system based on multi-touch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] This embodiment provides a gesture recognition method based on multi-touch, including the following steps:

[0077] S1: Select the infrared emitting tube 1 and the corresponding infrared receiving tube 2 one by one, scan the effective touch area horizontally and vertically, and determine the position information of the quasi-touch point according to the position of the blocked scanning line; in this step, you can choose the most Simple one-to-one scanning mode, that is, one infrared emitting tube 1 emits scanning lines, controls the corresponding infrared receiving tube 2 to receive scanning lines, and uses one-to-one scanning mode to scan, and there are When there are multiple touch points, false touch points will appear, such as image 3 As shown, the black dot represents the real touch point 3, and the white dot represents the false touch point 4; the position information of the touch point obtained at this time includes the position information of the real touch poi...

Embodiment 2

[0091] In this embodiment, as a preferred solution of embodiment 1, the method for screening the true point set in step S4 in embodiment 1 can adopt the following steps:

[0092] S41: Through the one-to-many scanning method (infrared light emitted by one infrared emitting tube can be received by multiple infrared receiving tubes), horizontally scan the effective touch area, such as Figure 7 As shown, taking one end of the infrared emitting tube as a reference, the first scanning line blocked by the real touch point is the scanning line emitted by No. 01 infrared emitting tube and received by No. 01' infrared receiving tube, which is the first horizontal line of the real touch point. The last scanning line is the scanning line emitted by No. 03 infrared emitting tube and received by No. 03' infrared receiving tube, which is the first horizontal end boundary of the real touch point; The first scan line blocked is the scan line received by No. 02' infrared receiving tube and emi...

Embodiment 3

[0101] This embodiment is another preferred implementation mode of embodiment 1. The step S4, the method for screening the true point set, includes the following steps, taking the horizontal direction as an example:

[0102] S4A: Perform one-to-many scanning on the effective touch area in the horizontal direction;

[0103] S4B: If Figure 9 As shown, taking one end of the infrared emitting tube as the reference, the first scanning line that is blocked is the third horizontal starting boundary, and the last scanning line is the third horizontal ending boundary; taking the end of the infrared receiving tube as the reference, the blocked The first scanning line in the horizontal direction is the fourth starting boundary, and the last scanning line is the fourth horizontal ending boundary; the intersection point of the third horizontal starting boundary and the fourth horizontal starting boundary is the third horizontal starting boundary. A boundary point, the intersection point ...

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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 [0001] The invention relates to a gesture recognition method and system based on multi-point touch, which belongs to the technical field of microprocessor control, in particular to the technical field of touch point detection for infrared touch screens. Background technique [0002] Infrared touch screens in the prior art, such as figure 1 As shown, a one-to-one corresponding infrared emitting tube 1 and infrared receiving tube 2 are installed on the frame around the boundary of the effective touch area. The processor controls only one infrared emitting tube 1 to emit infrared light (hereinafter referred to as the scanning line) at a certain moment through the timing control circuit, so the corresponding receiving tube 2 can only receive the scanning line in one direction at this moment. In one scan cycle, the processor controls each infrared emission tube 1 to emit scan lines in turn to scan the effective touch area; if there is a touch point in the effecti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/042
Inventor 王武军满庆奎刘新斌管健
Owner BEIJING IRTOUCH SYST CO LTD