Determination method, device and system for virtual mouse position

Abstract

The embodiment of the invention provides a determination method, device and system for a virtual mouse position. The method comprises the steps that a laser spot position of a non-visible light frequency band on a projection screen, a boundary point position of a projection image on the projection screen and a screen display resolution of a computer projecting the image onto the projection screenare acquired; and the virtual mouse position is obtained according to the laser spot position, the boundary point position of the projection image and the screen display resolution of the computer. Through the scheme, the position of a laser pen spot relative to the projection screen can be calculated quickly and accurately, noise interference from visible light is avoided, the scheme has the advantages of a small calculated quantity, rapidity and accuracy, dual display of the laser pen spot and a mouser pointer cannot occur, and visual interference on field audiences is avoided.

Description

technical field [0001] The present invention relates to the field of projection image processing, in particular to a method, device and system for determining the position of a virtual mouse. Background technique [0002] Laser pointers are more and more widely used in teaching, presentations, training, conferences, business presentations, etc. In order to obtain better demonstration effects, speakers usually use the light points projected by laser pointers on the screen to highlight the key points of the current content. The live audience can get a good demonstration effect. [0003] However, common laser pointers have the following disadvantages: (1) The laser pointer does not have the function of a mouse. When the speaker needs to use the mouse, he has to go back to the computer, and the mouse pointer and the laser pointer light point appearing on the projection screen at the same time may cause problems. It causes certain visual interference to the audience; (2) The aud...

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Problems solved by technology

[0003] However, common laser pointers have the following disadvantages: (1) The laser pointer does not have the function of a mouse. When the speaker needs to use the mouse, he has to go back to the computer, and the mouse pointer and the laser pointer light point appearing on the projection screen at the same time may cause problems. Cause some visual interference to the audience; (2) The audience participating in the teleconference can only see the position of the mouse, but not the position of the laser pointer

[0004] To realize a laser pointer with mouse function, the current solution is to use additional equipment such as a camera or an image sensor to obtain the image of the laser pointer spot, and then calculate the position of the laser spot relative to the projection screen through an image processing algorithm, and then use the position data Send the wireless signal to the computer, and then the computer displays the coordinates of the mouse pointer movement. This method requires additional equipment and has a large amount of calculation.

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