The current projector and large screen are widely used, but the traditional keyboard and mouse-based human-computer interaction interactively bond the speaker next to the computer, and cannot realize the speaker and the audience. To solve this problem, a laser pen interactive input system is proposed. It is possible to let the speaker use the laser pen to interact with the computer in the distance. The basic idea of the laser pen interactive input system is: use the camera to shoot the big screen, transmit it to the computer through the video capture card, the computer passes the image processing technology to get a laser pen The coordinates of the projection point in the picture.The Laser pointer interactive input system, interacts with the computer, implements the laser pen to the screen content, control the mouse operation, etc., so that the speaker gets rid of the traditional interaction. The entire system is easy to manipulate, simple and practical, and can be applied to various occasions such as teaching, conferences, speeches. In the spot detection part, improve the traditional background update algorithm, propose adaptive background update algorithms, so that the system is adapted to the scene conditions.Has strong adaptability.
It must be cautious using laser pen. In the art gallery, because some paintings may be afraid of light, it is not suitable for laser pointer. In the zoo, for scared animals, there should be a laser pen. Astronomical enthusiasts should pay attention when using laser pen to refer to the star, should not use the star pen in frequent and long hours to avoid others watching stars and photography. In the public place in people, in order to avoid accidentally injuring others, they should stop using laser pen. Some larger power laser pen will have a significant thermal effect, and it is not possible to use a solid laser laser for a long period of time, particularly a solid-sensitive temperature.