Processing method of road traffic OD (Optical Density) information collection system for license plate recognition

Abstract

The invention relates to a road traffic OD information collection system for license plate recognition data, which comprises three subsystems of a roadside data collection subsystem, a roadside communication subsystem and a license plate recognition collection and processing platform subsystem; high-speed communication, transmission and data invocation between the data collection subsystem and the license plate recognition subsystem are finished by utilizing the roadside communication subsystem. The processing method comprises the following working steps from step 1 to step 7: storing and uploading the license plate recognition information of an external field collection section; secondary cleaning and secondary recognition; tracing and updating vehicle routes in real time; processing single-vehicle track tracing and revising single-vehicle OD errors caused by errors generated during the license plate information collection and transmission; counting the number of specific vehicles with the same types, the same starting points and destinations and in the same period when passing through the destinations; classifying and storing the revised OD values according to the information ofthe statistics periods, the vehicle types, the destinations and the like; and displaying an OD distribution matrix in forms of reports and graphs.

Description

technical field [0001] The invention relates to an urban traffic information collection system and a processing method thereof, in particular to a road traffic OD information collection system of license plate recognition data and a processing method thereof, belonging to the technical field of intelligent transportation. Background technique [0002] Since entering the 21st century, the construction of urban roads and the increase in the number of motor vehicles have entered a stage of rapid development. At the same time, through the construction of the urban traffic information collection system, good social, economic and environmental benefits have been achieved in terms of road traffic management, support for road traffic information applications and services, etc. However, with the expansion of the coverage area and the different traffic flow characteristics of the road network in different regions, the existing road traffic information collection system gradually shows...

AI Technical Summary

Problems solved by technology

In the road network OD estimation method whose patent application number is 200810084396.7 and whose publication number is CN101261768, the current OD distribution matrix is ​​calculated by using the historical OD data of the road network and the actual flow observation value of the road section. The limitations of the inference model in terms of algorithm assumptions and parameter calibration often lead to large deviations between the results of OD inversion and the real situation

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