IMAGE PROCESSING APPLIED TO TRAFFIC MEASUREMENT: THE TITAN SYSTEM
J-M Blosseville, F Lenoir, Serge Beucher · Recherche Transports Sécurité · 1988
Algorithms of video traffic image processing, presented below, have been developed by CMM and INRETS using 256 X 256 X 6 bits images collected from various scenes covering 50-300m area of a freeway under various weather conditions. First, road detection is automatically performed. The road and traffic lanes images are used to derive relationships between real and image distances and to build image transformations independent from the perspective view. Then, markers of the vehicle are extracted using grometical adapted filters. These markers are joined to define a single marker for each vehicle. Finally, vehicles trajectories are built and traffic variables are specified. Neither nocturnal traffic nor dense traffic are investigated in this paper.