Design of a Computer Stereo Vision Based Road Marking System

Existing methods to put white and yellow marking on the road are based on manual measurement of the road dimensions and manual marking of guide lines. It is a time consuming, cumbersome and labour intensive process. This was the motivation for this work to develop a system which can automatically apply road markings according to the width of the road. In this paper, a stereo-vision based road marking system is presented. Computer stereo-vision has been used to measure the width of the road which helps us decide the number of lanes on the road. To generate the disparity map, a semi-global matching algorithm has been used, incorporating the advantages of both local and global matching algorithms. Efficient algorithms have been used for camera calibration and to estimate the road width. For deciding the number of lanes, the standards laid down by Indian Road Congress (IRC) have been followed..