Real-time precise recognition method for vehicle number board

A recognition method and number plate technology, applied in the field of image recognition, to achieve the effect of precise positioning

Active Publication Date: 2009-03-11
JIANGXI GANYUE EXPRESSWAY
View PDF0 Cites 43 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a method for real-time recognition of vehicle number plates, using the maximum gradient difference (Maximum Gradient Difference—MGD) in a local area to describe the texture features of the character strokes of the license plate to realize the rough positioning of the license plate, thereby solving the problem of natural light image number plate positioning

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Real-time precise recognition method for vehicle number board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The trigger mechanism is set above the front road through the gantry frame. The trigger mechanism adopts a linear array CCD camera, and the lens is perpendicular to the road facing downward, which can scan the road below. The scanned information is binarized by the computer to determine whether there is a vehicle; the capture camera group The gantry is erected above the road at the back to take pictures of the road in front, and the focus of the capture camera must be adjusted in advance before installation.

[0019] The working process of the trigger mechanism is: perform wavelet transformation on each frame of image captured by the linear array CCD camera, count the gray level changes of adjacent pixels in several frames, use the situation with the highest probability as the background texture feature, and perform binary analysis on the data frame by frame. Valuation and analytical processing. If there are 30 consecutive lines of data in a certain lane with targets ap...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for the real-time and correct identification of a vehicle registration plate, which pertains to the field of traffic control. The method of the invention utilizes a trigger mechanism to control a camera for snap shot and a computer conducts character acquisition, registration plate locating, registration plate cutting over a vehicle registration plate shot by the camera for snap shot and then carries out character recognition so as to obtain a registration plate character. The method is characterized in that the registration plate locating first adopts the technology of the Maximum Gradient Difference (MGD) in a local area to realize the coarse positioning; then the gray-scale statistics of character pixels and background pixels is calculated to realize the binaryzation of local threshold values based on the coarse positioning; next the characters of the registration plate are captured according to the characteristics of a connected domain of the characters of the registration plate; finally the precise locating of the registration plate is realized by combining the structure of the characters of the registration plate. In addition, the method solves the problem of the locating of the registration plate with a natural light picture, realizes the precise locating of the registration plate and can recognize various special registration plates.

Description

technical field [0001] The invention belongs to the field of traffic management, and mainly relates to image recognition technology. Background technique [0002] The vehicle number plate is the identity of the vehicle. Accurate identification of the vehicle number plate plays an important role in traffic management. Only by accurately identifying the number plate can the vehicle be supervised, restrained, and processed. Cars are a highly dangerous means of transportation, especially when the vehicle is running at high speed, stricter supervision is required. However, the number plates of high-speed vehicles are not easy to see clearly, and it is also difficult for video cameras and cameras to clearly capture the number plates. It is even more difficult to identify them correctly if they are identified by computers. In addition, there are many versions and styles of vehicle number plates according to regions, uses, and vehicle types. [0003] With the rapid development of ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/20G08G1/017
Inventor 黄铮李卫江蒋雅辉文勇
Owner JIANGXI GANYUE EXPRESSWAY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap