License plate recognition system and license plate recognition method preventing blocking and altering

A technology of license plate recognition and masking, applied in the field of intelligent transportation and license plate recognition, to achieve the effect of overcoming bottlenecks, high image quality, and less background noise

Inactive Publication Date: 2011-08-17
杨星
View PDF3 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are situations where supplemental light is required (such as night or low-light conditions), the design of existing license plate recognition systems is almost all based on passive imaging conditions, and must deal with adverse factors such as complex backgrounds and lighting changes
Despite advanced image processing

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
  • License plate recognition system and license plate recognition method preventing blocking and altering
  • License plate recognition system and license plate recognition method preventing blocking and altering
  • License plate recognition system and license plate recognition method preventing blocking and altering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] Such as figure 1 , figure 2 , image 3 shown.

[0049] 1. Design of anti-obscure license plate recognition system:

[0050] 1.1 System design principle: the license plate has retro-reflection characteristics that are different from the body, other backgrounds, and masking materials; the active imaging that can overcome the influence of external light realizes the highlighting of the license plate area in the image, and the body, other backgrounds, and masking materials low-brightness display; the near-infrared and visible light combined active and passive imaging system and supporting software realize the functions of license plate positioning, masking and alteration discrimination, character segmentation and character recognition.

[0051] 1.2 An active-passive imaging system based on retro-reflection is designed. The input is a capture trigger signal, and the output is a group of near-infrared and visible light images with a similar field of view during the day, a...

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 license plate recognition system and a license plate recognition method preventing blocking and altering. The method comprises the following steps of: firstly, designing an active and passive imaging system by using the regression reflection property of a license plate to realize highlight displaying of a license plate region in an image and lowlight displaying of a vehicle body, other backgrounds and a blocking and altering material; secondly, designing the license plate recognition method preventing blocking and altering to realize blocking and altering discrimination and character recognition; and finally, improving design of the license plates which have widest application. Compared with the conventional license plate recognition system, the license plate recognition system provided by the invention has a function of preventing blocking and altering and improves the degree of intellectualization of the system; meanwhile, the quality of an acquired license plate image is high, a background noise is low, and the license plate image is insensitive to the change of illumination from the outside, so that a bottleneck effect of the quality of an image source on recognition process is overcome to a large extent.

Description

technical field [0001] The invention relates to the fields of intelligent transportation and license plate recognition, in particular to an anti-masking license plate recognition system and a recognition method. Background technique [0002] Intelligent Transportation System (Intelligent Transportation System, ITS) is one of the largest systems engineering in the field of information today, and it is a global hot issue that affects economic development and social progress. ITS refers to the effective integration of advanced artificial intelligence technology, automatic control technology, computer technology, information and communication technology, sensor technology and system engineering technology, and apply them to ground traffic management, so as to establish a large-scale, all-round Functional, real-time, accurate and efficient integrated transportation management system. [0003] Vehicle automation management is the main problem that ITS needs to solve, and license ...

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
IPC IPC(8): G06K9/00G03B15/05
Inventor 杨星杨华郝晓莉马鹏
Owner 杨星
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