Recognition method of touch screen by use of writing pen

A recognition method and touch screen technology, applied in the field of image recognition, can solve the problem that the touch screen is susceptible to external interference and errors, and achieve the effects of smooth writing, avoiding finger wear, and accurate touch operation.

Active Publication Date: 2013-03-20
HUAWEI TEHCHNOLOGIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no such device on the touch screen at present, that is, a device for identifying whether the object currently touching the screen is a finger, a writing pen or other objects. External interference, causing errors

Method used

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  • Recognition method of touch screen by use of writing pen
  • Recognition method of touch screen by use of writing pen
  • Recognition method of touch screen by use of writing pen

Examples

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Embodiment 1

[0024] like figure 1 As shown, it is a touch positioning device for a large-size touch screen. In the figure, 101, 102, and 103 are three cameras, which are respectively installed in the upper left corner, middle and upper right corner of the touch screen frame 104. Wherein, the shooting range of the cameras 101, 103 is 90 degrees, the shooting range of the camera 102 is 170 degrees, the resolution of the images taken by the three cameras adopted in this embodiment is 1280*8, the image pixel color depth is 8 bits, and the background of the image taken is black light-absorbing The frame of the touch screen is made of material, so when there is no touch object on the touch screen 105, the images collected by the three cameras have a black background. Once the touch screen is blocked, light spots will appear on the image collected by the camera. This patent is to identify whether the touch object is a writing pen according to the light spot. The resolution of the touch screen a...

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PUM

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Abstract

The invention discloses a recognition method of a touch screen by use of a writing pen. The recognition method comprises the following steps of: shooting images by use of three cameras arranged at the left-upper corner, middle and right-upper corner of the touch screen; when light spots exist in the images, calculating the widths of the light spots and the distances from a touch point to the three cameras; then respectively multiplying the width value and the distance of the light spot corresponding to each camera to obtain a recognition variable corresponding to each camera; if the vertical coordinate of the touch point is not more than a set threshold, taking the sum of the recognition variables obtained by the cameras at the middle and right-upper corner of the touch screen as recognition factors, or taking the sum of the recognition variables obtained by the cameras at the left-upper corner and right-upper corner of the touch screen as recognition factors; and then judging whether the current touch object is the writing pen by the recognition factors, if so, allowing writing, and if not, forbidding writing. By utilizing the method, the error caused by non-conscious touch behaviors of operating staffs can be effectively avoided, and the touch operation can be carried out more accurately.

Description

technical field [0001] The invention relates to the field of image recognition, in particular to a writing pen recognition method for a touch screen. Background technique [0002] For interactive touch screens, traditional input methods are divided into stylus input and finger input. The finger input method is to use fingers to write directly on the touch screen. This method not only does not write smoothly, it is easy to bring wear to the fingers, and it will cause a lot of writing interference. For example, when using the index finger to write on the screen, the middle finger, One or several of the ring finger and the little finger may touch the screen unconsciously, and the sleeve may also touch the screen unconsciously, thereby disturbing the writing of the index finger and causing a wrong connection. And the mode that adopts writing pen to input can preferably solve the above-mentioned problem. However, there is no such device on the touch screen at present, that is, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06K9/20
Inventor 韦金汝肖平
Owner HUAWEI TEHCHNOLOGIES CO LTD
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