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Multi-point touch gesture recognition method and mistaken touch prevention method

A gesture recognition, multi-touch technology, applied in the field of human-computer interaction, can solve problems such as hindering the development and development of unified software, false touch, and inability to distinguish the touch pen and the finger well.

Pending Publication Date: 2021-06-25
安徽宝信信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the prior art, there are many problems in the interactive mode of multi-finger touch
For example, there are differences in the development of platform manufacturers of various operating systems, which in turn makes it difficult for developers in the software industry to switch between different platforms and operating systems, especially when developing multi-finger touch interaction methods on localized operating systems. Compatibility and unification hinder the development and development of unified software
Moreover, existing technical solutions only solve multi-finger gesture recognition in the design and implementation of gesture recognition, and cannot distinguish the difference between touch pen and finger well. When the system is working, there are multiple contact points (finger and touch pen). ), if the contact point cannot be distinguished, it will cause the problem of false touch

Method used

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Experimental program
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Effect test

Embodiment 1

[0047]A multi-touch gesture recognition method, such as figure 1 As shown, the method includes the following steps S1 to S6:

[0048] S1: Define the canvas touch management method, and divide the canvas touch into gesture touch and drawing touch.

[0049] Specifically, since the software canvas may be boundless, in the drawing touch state, there is no need to use areas other than the current screen, so the canvas coordinate system is used. At this time, touch operations such as touch pens and mice are defined as single-point touch operations; finger touch operations can be classified into single-point touch and multi-point touch according to touch points. Among them, single-touch support: operations such as drawing notes; multi-touch support: operations such as erasing.

[0050] When you need to use a larger area of ​​the canvas, select the gesture touch state to pan and zoom the canvas, so the screen coordinate system is used.

[0051] S2: Define the state transition proce...

Embodiment 2

[0079] A multi-touch anti-false touch method, firstly uses the gesture recognition method described in Embodiment 1 to identify multi-touch operations, and realizes anti-false touch on the basis of accurate recognition. The specific process is:

[0080] Once there is movement in the same group of touch points, not only the group is determined, but even if the touch points of this group no longer exceed the movement detection threshold, the state scanned by the detection program will be forcibly modified to the Press state, thereby determining the gesture or It is to limit the working state of the finite state machine FSM, and no change will be made until all fingers leave; once the finite state machine FSM is limited, other touch behaviors that enter later will also become the working state of the finite state machine FSM when it is limited, Unless all fingers leave, the finite state machine FSM is allowed to change the state, so as to realize the anti-false touch of multi-tou...

Embodiment 3

[0082] A multi-touch gesture recognition and false touch prevention system under a general platform, based on the gesture recognition method designed in the above-mentioned embodiment 1 and the false touch prevention method designed in the above-mentioned embodiment 2. First build a general platform that supports various operating systems, and then develop a multi-touch gesture recognition and anti-mistouch system based on this platform.

[0083] Specifically, based on Microsoft's general platform framework Xamarin, the development supports general software under Android / iOS / Windows and domestic operating systems; based on . The unique features of their respective platforms. Among them, .NET Core has the advantages of building modern, scalable and high-performance cross-platform software applications; if you need to support the versatility of multiple platforms, use the extended Xamarin.Essentials to develop their respective platforms The unique functions supported by requirem...

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Abstract

The invention discloses a multi-point touch gesture recognition method and a mistaken touch prevention method, and the gesture recognition method comprises the steps: defining a canvas touch management mode, and dividing canvas touch into gesture touch and drawing touch; defining a state conversion process in a finite state machine (FSM) in a canvas mode; judging the touch number and the touch type according to the touch area and the touch pressure intensity; adding an ID field to each touch point, and tracking the change of the touch state; eliminating the touch jitter by moving the detection threshold according to the change of the tracking touch state; in combination with the set ID, carrying out touch grouping and realizing multi-point touch gesture recognition. According to the invention, drawing with multiple single fingers and eraser operation with more than three fingers can be supported at the same time, and the situation that the system can only work to identify single touch operation is broken through; moreover, through touch grouping, simultaneous single-finger drawing of multiple persons and simultaneous erasing operation of more than three fingers of multiple persons can be realized.

Description

technical field [0001] The present invention relates to the field of human-computer interaction, in particular to a multi-touch gesture recognition method and a false touch prevention method. Background technique [0002] With the advancement of the wave of intelligence, many industries have gradually entered the digital remote era. Drawing software similar to electronic whiteboards in large-scale display devices is widely used in related fields, especially education and teaching, live interaction and remote meetings. direction. The way of human-computer interaction is also from the most common keyboard, mouse and display, and the interaction method of multi-finger touch is additionally added. [0003] However, in the prior art, there are many problems in the multi-finger touch interaction mode. For example, there are differences in the development of platform manufacturers of various operating systems, which in turn makes it difficult for developers in the software indust...

Claims

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Application Information

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IPC IPC(8): G06F3/041G06F3/0485G06F3/0486G06F3/0488
CPCG06F3/0414G06F3/04162G06F3/04166G06F3/04186G06F3/0486G06F3/0485G06F3/04883G06F2203/04808G06F2203/04105G06F2203/04104G06F2203/04106G06F2203/04806
Inventor 李广垒方田陈祖涛
Owner 安徽宝信信息科技有限公司
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