Method for simultaneously supporting writing inside and outside the projection area of ​​an electronic whiteboard

Abstract

The invention provides a method for supporting writing simultaneously in and out of an electronic white board projection area. According to the method, firstly, an electronic whiteboard is positioned, so that a whiteboard drive program can distinguish a projection area and an area out of the projection area; secondly, when people use a writing device to write on the electronic whiteboard, infrared hardware on the electronic whiteboard obtains the coordinate of the writing device according to the position where the current writing device touches, and sends the coordinate to the whiteboard drive program; thirdly, the whiteboard drive program converts the coordinate of the writing device into a corresponding screen coordinate on the projection area according to a whiteboard position algorithm, the whiteboard drive program judges whether the screen coordinate is in the projection area of a screen according to the obtained screen coordinate, if the answer is yes, simulation operations of a mouse or touch are carried out in the projection area, and if the answer is no, the simulation operations of the mouse or the touch are not carried out in the projection area. According to the method, normal writing in the projection area can be achieved, and meanwhile gel pen writing in the area out of the projection area is supported.

Description

technical field [0001] The invention relates to the technical field of digital image processing, in particular to an interactive electronic whiteboard, and is particularly applied to a method for simultaneously supporting writing in and outside the projection area of ​​the electronic whiteboard. Background technique [0002] The interactive electronic whiteboard can communicate with the computer, connect the electronic whiteboard to the PC, and use the projector to project the content on the PC to the electronic whiteboard screen. With the support of special applications, a large screen, interactive style collaborative meeting or teaching environment. Using a specific positioning pen instead of a mouse to operate on the whiteboard, you can run any application program, and you can edit, annotate, save, and any other operations that can be achieved on the computer using the keyboard and mouse. [0003] The working principle of the infrared interactive touch electronic whitebo...

AI Technical Summary

Problems solved by technology

[0004] However, the infrared electronic whiteboards currently on the market only support infrared pens (or opaque objects such as fingers) to write in the projection area of ​​the board, and do not support writing with a water pen on the board outside the projection area and between the frame at the same time. The function of writing area

If you write with a water pen on the existing infrared whiteboard at the same time, it will be mistaken for an infrared pen operation, resulting in misoperation

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