Direct-azimuth towing guidance method for light road rescue equipment based on vehicle underbody shadow feature locating license plate

Abstract

A forward towing guidance method for light road rescue equipment based on vehicle bottom shadow feature locating license plate is disclosed. Firstly, a region of interest of vehicle bottom shadow is set. Secondly, the underbody shadow segmentation is performed on the gray-scale image of the region. Next, an operation of extracting shadows from the vehicle bottom is carried out; then, according tothe position of the shadow under the vehicle, the region of interest of the license plate is determined, and the image of the region is converted into a gray image, which is processed by Gaussian smoothing filtering, Prewitt edge detection and binarization in the vertical direction. Then, the edge points are screened according to the proposed algorithm of candidate point set and effective point set. After that, the effective points are connected by morphological method, and the license plate area and the center position of the license plate are obtained by screening according to the characteristics of the area and the length of the license plate. Finally, according to the position difference between license plate center and image center in the lateral direction, the towing guidance is carried out. The positive azimuth towing inducing method provided by the invention has strong environmental adaptability and anti-interference ability.

Description

technical field [0001] The invention belongs to the field of intelligent operation of road rescue equipment, and in particular relates to a positive orientation towing induction method for light road rescue equipment for locating license plates based on vehicle bottom shadow features. Background technique [0002] With the rapid development of transportation and automobile industry, the mileage of highways and car ownership in the world are increasing rapidly. In sudden public safety incidents, road traffic accidents account for the largest proportion. In recent years, road traffic accidents account for all The proportion of the total number of such safety accidents remains high, even exceeding 70%, and the death toll accounts for 83% of the total death toll of various safety accidents, which has become the public safety issue that the masses and government departments are most concerned about. After a road traffic accident occurs, if the accident vehicle cannot be quickly a...

AI Technical Summary

Problems solved by technology

In the traditional towing induction process, the operation of aligning the support arm of the road rescue equipment with the front wheel of the accident vehicle depends on the driver's experience, which is time-consuming and inefficient

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