基于图像处理的划线激光笔系统设计

论文设计一种划线激光笔系统，通过USB摄像头拍摄投影屏，编制软件采集图像并进行处理，检测出激光笔在屏幕上的亮点位置，在屏幕上绘制亮点的轨迹线，使教师能够操作激光笔在投影屏上指示时能够留下痕迹，起到较好的指示作用。系统设计红光和绿光组合的激光笔，在摄像头前设置可通过绿光的滤光片，实现激光笔发射绿光时系统划线，而发射红光时则不划线的功能。系统可以增加演讲的交互性，使讲解更加生动。

Design of Scribing Laser Pointer System Based on Image Processing

Designs a new system of lineation laser pointer based on image processing. Uses USB camera shooting projector screen, acquires and pro- cesses the photos by programming, detects the position of light spot on the projector screen, draws the trace of light spot on the projector screen. This system enables teachers leaving a mark on the projector screen when points to it by using laser pointer and raising the effect of pointing. Designs the laser pointer combined with red and green light, sets the green light filter in front of the camera. Realizes the function of lineation when the laser pointer emitting green light rather than red light. This system improves the interaction between speak- er and audiences making the speech more vivid.