Vehicle type automatic recognition method and system

Abstract

The invention discloses a vehicle type automatic recognition method and system. The method comprises: obtaining a vehicle roof characteristic acquired by a laser radar; obtaining a first image acquired by a first camera; obtaining a second image acquired by a second camera; determining a transformation matrix between the first image and the second image; splicing the first image and the second image according to the transformation matrix; performing image fusion on the spliced images by employing an image fusion algorithm based on a Laplacian pyramid; performing smooth processing on the fusion image; extracting a vehicle chassis characteristic according to the smoothed image; extracting a vehicle wheel shaft characteristic according to the smoothed image; and determining the vehicle type according to the vehicle chassis characteristic, the vehicle wheel shaft characteristic and the vehicle roof characteristic. According to the vehicle type automatic recognition method and system, the requirement of the installation precision is low, the calculation amount is small, and the accuracy of vehicle type recognition is high.

Description

technical field [0001] The invention relates to the field of vehicle identification, in particular to a vehicle type automatic identification method and system. Background technique [0002] The traditional expressway vehicle vehicle type recognition technology can be roughly divided into two types, namely the automatic vehicle type recognition system based on image recognition and the automatic vehicle type recognition system based on grating. However, the traditional automatic type recognition system based on image recognition requires a large amount of calculation. , The recognition effect is unsatisfactory; while the traditional automatic vehicle identification system based on gratings cannot detect the number of wheels, vehicle height, etc. Environmental factors such as dust, ice fog, and rain on the site will also affect the normal operation of the system, and the installation needs High-precision alignment, difficult construction. Contents of the invention [0003]...

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Problems solved by technology

[0002] The traditional expressway vehicle vehicle type recognition technology can be roughly divided into two types, namely the automatic vehicle type recognition system based on image recognition and the automatic vehicle type recognition system based on grating. However, the traditional automatic type recognition system based on image recognition requires a large amount of calculation. , The recognition effect is unsatisfactory; while the traditional automatic vehicle identification system based on gratings cannot detect the number of wheels, vehicle height, etc. Environmental factors such as dust, ice fog, and rain on the site will also affect the normal operation of the system, and the installation needs High-precision alignment, difficult construction

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