Camera positioning-based touch screen system

Abstract

The invention relates to interaction control of graphical user interfaces, in particular to a camera positioning-based touch screen system suitable for large screens. The camera positioning-based touch screen system comprises at least one first group of cameras arranged on the back of a target touch area, and at least one second group of cameras arranged on the surface of the target touch area; the first group of cameras are used for acquiring light spot actuating signals projected to the target touch area; the second group of cameras are used for acquiring touch actuating signals entering a space of a shooting area of the second group of cameras; moreover, the system also comprises at least one switching device. When the system is in a light spot actuating signal mode, the system can only identify the light spot actuating signals entering the target touch area, and limbs of a human body or other articles held by the human body cannot operate the graphical user interfaces, so that theinconvenience brought to users due to non-instruction operation of the users is prevented.

Description

technical field [0001] The invention relates to interactive control of a graphic user interface, in particular to a camera-based positioning touch screen system suitable for large screens. Background technique [0002] With the development of computer multimedia technology, interactive electronic whiteboard, as an advanced education or conference auxiliary human-computer interaction equipment, can realize functions such as dust-free writing, free writing, and remote communication. From the hardware principle, the interactive electronic whiteboard integrates large-screen display technology, precise positioning testing technology, etc. There are many technologies that can realize the precise positioning of the electronic whiteboard, and the representative ones are electromagnetic induction, infrared, resistance, ultrasonic, CCD and other technologies. . Each technology has different characteristics and advantages, and occupies a certain share in the electronic whiteboard mark...

AI Technical Summary

Problems solved by technology

[0005] However, there are some defects in the above-mentioned patents: in practical applications, when people stand in front of the large screen of the interactive electronic whiteboard for teaching or meetings, they will make some misoperations, such as touching the entire palm or a certain part of the body instead of just a finger The screen, or some habits of the user, such as specifying a certain position or area of ​​the screen with fingers