Touch source identification method and system

A recognition method and touch screen technology, applied in the field of pattern recognition, can solve problems such as difficulty in guaranteeing recognition accuracy, and achieve the effects of design difficulty, low production cost, high recognition accuracy, and avoiding false touches

Active Publication Date: 2014-06-18
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the block segmentation in this scheme depends on the accuracy of the watershed algorithm, and the customization of the threshold depends on the empirical judgment in the experiment, so there are unrobust factors in these two links, which makes the recognition accuracy of the method Difficult to guarantee

Method used

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  • Touch source identification method and system
  • Touch source identification method and system

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Experimental program
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Embodiment Construction

[0072] The basic idea of ​​the present invention is: acquire a sensing image; remove noise and determine the touch source image according to the sensing image; determine the type of the touch source according to the touch source image and preset touch source characteristics.

[0073] The embodiment of the present invention proposes a touch source identification method, such as figure 1 As shown, the method includes:

[0074] Step 101: Acquire a sensing image;

[0075] Here, generally by scanning the two-dimensional array elements of the touch screen, the capacitance change values ​​of intersections of multiple row electrodes and column electrodes are obtained, and combined with the coordinate values ​​of multiple intersections of row electrodes and column electrodes to obtain a sensing image. For example, the acquired sensing image as figure 2 shown.

[0076] Step 102: Remove noise and determine a touch source image according to the sensing image;

[0077] In order to ide...

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PUM

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Abstract

The invention discloses a touch source identification method. The method comprises acquiring a sensing image; according to the sensing image, removing noise and determining a touch source image; according to the touch source image and default touch source characteristics, determining the type of touch source. The invention also discloses a touch source identification system. According to the plan of the touch source identification method and system, a portable device with a capacitive touch screen can separate fingers from other common touch sources, such as cheeks, ears and hands, so that the identification accuracy is higher, and occurrences of error touch can be avoided effectively. Furthermore, the touch source identification method and system does not require using additional originals, such as proximity sensors and infrared light emitting diodes, so that the production cost and the difficulty of design are lower.

Description

technical field [0001] The invention relates to pattern recognition technology, in particular to a touch source recognition method and system. Background technique [0002] Finger touch input is currently the main input method for smartphones and tablet computers. The touch screen uses the current induction of the human body. The user and the surface of the touch screen form a coupling capacitor. For high-frequency currents, the capacitor is a direct conductor, so the finger absorbs a small current from the contact point, and this current is divided from the touch screen. The electrodes on the four corners flow out and the current flowing through these four electrodes is proportional to the distance from the finger to the four corners. The controller obtains the position of the touch point through accurate calculation of the four current ratios. [0003] However, during a call, misoperation of touch screen buttons by other objects such as cheeks and ears often leads to obst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/044
Inventor 初君
Owner CHINA MOBILE COMM GRP CO LTD
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