Robot path obstacle locator using webcam and laser emitter

In this paper, a method to measure distance using a laser-pointer is presented. This method calculates the distance of the robot from obstacles to enable it to traverse to its target location, while avoiding obstacles along the way. Images of the workspace environment are first captured using a webcam. Image processing techniques are then used to identify the existence of obstacles. Using a laser emitter, the distance to obstacles can be calculated. The rangefinder system consists of a single robot mounted webcam and a laser-pointer. The program is written in MATLAB with the Image Processing Toolbox.