Touch screen multi-point touch control method and device for front positioning of cameras

Abstract

The invention relates to the technical field of optic touch control, particularly to a touch screen multi-point touch control method and a device for front positioning of cameras. Cameras are respectively mounted at the left and the right corners of the upper edge frame of the positioning frame of a touch screen, two cameras shooting in the opposite directions are mounted in the middle of the upper edge frame, infrared light sources are respectively mounted on the left edge frame, the right edge frame and the lower edge frame of the positioning frame respectively, and the method comprises the following steps: acquiring light spot data in images of the cameras and calculating the light spot intersections; calculating the distance between the light spot intersections; arranging a distance threshold value and merging light spot intersections with distances smaller than the threshold value to obtain points to be located; and merging repeated points to be located to obtain touch points. According to the invention, real touch points and false touch points can be judged accurately, the resolution of the touch points is improved greatly, and the multi-point touch control in the technical field of front positioning of the cameras is achieved.

Description

technical field [0001] The invention relates to the field of optical touch technology, in particular to a multi-touch method and device for positioning a touch screen in front of a camera. Background technique [0002] Touch technology has entered every aspect of people's daily life, ranging from touching mobile phones and tablet computers to smart conference systems and splicing display walls. Touch technology has been applied to all aspects of production and life due to its intuitive and convenient performance. In the field of large-scale touch control, currently more mature touch technologies include infrared tube scanning technology, camera optical positioning technology, ultrasonic positioning technology, etc. Among them, the positioning technology in front of the camera has been widely used due to its advantages of high positioning accuracy and sensitive response. In the field of positioning technology in front of the camera, the single-point positioning technology ha...

AI Technical Summary

Problems solved by technology

Even if it is a two-point touch, the existing technology detects two false points, and the current real two-point touch technology has poor application effect

As for multi-touch with more than two points, a more ideal solution has not yet been found. The most critical reason is that due to the limitation of positioning hardware devices, it is difficult for touch algorithms to deal with various problems that arise during multi-touch.

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