Recognition method of touch screen by use of writing pen

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, ...

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

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