A multi-finger touch recognition tracking method and system

Abstract

The invention relates to the field of touch control, and provides a multi-finger touch recognizing and tracking method. The multi-finger touch recognizing method comprises the steps that A the position of a touch point of a current frame is obtained; B whether the position of the touch point of the current frame is empty or not is judged; C whether the position of a touch point of a prior frame is empty or not is judged; D whether the position of a touch point of a frame before the prior frame is empty or not is judged; E the vector difference between the touch point of the frame before the prior frame and the touch point of the prior frame is calculated and the prediction position of the touch point of the current frame is determined; F the prediction point and the touch point of the current frame are calculated and the position of the touch point of the prior frame and the position of the touch point of the current frame are matched according to the global distance sum minimum criterion; G the point of the prior frame is assigned to the point of the frame before the prior frame, the point of the current frame is assigned to the point of the prior frame and the point of the current frame is empty; the step A is repeated. Tendency touch point position prediction greatly reduces tracking errors under the situation that point reduction or increase occurs in a prior frame and a later frame, therefore, the accuracy of touch point matching in a touch control system is guaranteed and the robustness of a tracking module of the touch control system is enhanced.

Description

technical field [0001] The invention belongs to the field of touch control, and in particular relates to a method and a system with a recognition and tracking function for processing multi-finger touches. Background technique [0002] With the continuous development and maturity of touch control technology, touch control products are widely used, and user experience and demand have become the unremitting driving force for touch control technology to continuously challenge new fields and extreme environments. [0003] In a system that realizes human-computer interaction through touch control, users usually hope that the machine can understand its intention more quickly and intelligently, so as to provide more natural and intelligent services. In the current touch control system, the machine recognizes the user's posture by analyzing the movement trajectory on the touch screen, thereby judging the operation that the user wants to perform. Therefore, it is extremely important ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a multi-finger touch identification and tracking method, aiming to solve the problem of tracking errors in adjacent frames with fewer or more points during the touch sliding process

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