The Design And Application On Key Algorithms In Traffic Monitoring

Intelligent Transport Registration System is a process to automate retrival and analysis vehicle information from videos taken at crossroads or highway, in order to strengthen the control of road traffic, public transport. In this thesis, we focus on the system architecture of ITS, and the relate algorithm realizing.We proposed a system architecture based on vehicle informationunit. The architecture embody that the vehicle is the transport registration system's essence. This system can keep balance among the whole procedure, to achieve a comprehensive effect. It also strengthens the extensibility, reconfiguration and portability of the system. provide facilities with respect to the management of system.In the research process of vehicle detect, we realize a detect algorithm based on background subtraction and frame difference. In the light of vehicle adherent, a algorithm based on concave spot detecting is implemented, the results shows that it is a good way to deal with the problem. We proposed a method of vehicle velocity measure based on road traffic marking detecting, we take advantage of the transformational relation of World Coordinate and Image Coordinate, omit the step of camera calibration. Not only enhance the efficiency of system, but also enhance the accuracy of velocity measure by averaging the outcome of repeated measuring.Besides, we take the plate number as a base attribute of vehicle informationunit. This thesis take a comparison among traditional plate number allocation method, realize a method of locate based on strengthened edge determination, a method of angularity correction based on Radon transform. In order to get the separate char from the string, we proposed a char segmentation method based on the template of gray-center. Refer to the property of numberalphabet and chinese character in plate, we realize a numberalphabet classifier based on multilevel template matching .