Safe driving assistance method and system based on change of license plate pixel height

A pixel height, safe driving technology, applied in the field of safe driving assistance methods and systems, can solve problems such as poor real-time performance, high cost, and complex structure

Active Publication Date: 2019-02-12
NANJING UNIV OF POSTS & TELECOMM
View PDF7 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Vehicle distance detection during driving is an important part of the early warning system. The current popular ranging methods mainly include radar ranging, ultrasonic ranging, laser ranging, etc

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
  • Safe driving assistance method and system based on change of license plate pixel height
  • Safe driving assistance method and system based on change of license plate pixel height
  • Safe driving assistance method and system based on change of license plate pixel height

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0066] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0067] Embodiment, the schematic flow chart of the specific embodiment of the present invention method sees figure 1 . figure 1 The illustrated embodiment provides a safe driving assistance method based on changes in license plate pixel height, including:

[0068] Step1: the first choice is to set a camera in the self-vehicle that adopts the safe driving assistance method based on the plate pixel height variation of the present invention for shooting the license plate image at the rear of the vehicle ahead. At present, basically all vehicles are equipped with a camera similar to a driving recorder that can shoot the license plate image of the rear of the vehicle ahead, so the existing camera i...

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 safe driving assistance method and system based on change of license plate pixel height. The safe driving assistance method based on the change of the license plate pixel height comprises the steps that a camera is set to shoot images in front of a vehicle; the current speed Vt and the camera-to-vehicle head distance S2 of the own vehicle are collected; a license plate isidentified and the pixel height h of the current license plate is determined according to license plate images shot by the camera; the current vehicle distance D is determined, wherein the vehicle distance D is determined by the focal length f of the camera, the actual height H of a front license plate and the pixel height h of the license plate; a current safe distance S is determined, wherein the safe distance S is determined according to a driver reaction distance S0, a driver braking distance S1 and the camera-to-vehicle head distance S2; and the vehicle speed is controlled to ensure thatthe vehicle distance D is greater than the safe distance S. The driving strategy switching based on the change of the license plate pixel height is very suitable for controlling the vehicle speed infuture automatic driving, in particular to a driving speed control method for an automatic driving vehicle on an expressway in a lane.

Description

technical field [0001] The invention belongs to the technical field of transportation, in particular to the technical field of intelligent transportation, and in particular relates to a safe driving assistance method and system based on changes in the pixel height of a license plate. Background technique [0002] Urban road traffic is closely related to people's life and is an indispensable and important part of daily life. With the prosperity of the country and the rapid development of the national economy, especially the rapid development of the automobile manufacturing industry and the expansion of automobile ownership, mobility Vehicles have become an indispensable means of transportation in people's daily life. In recent years, the speed of expressway construction has increased by leaps and bounds. Drivers have shown a blowout growth. The number of non-professional drivers has increased. Due to the uneven technical level of drivers and different driving behaviors, the d...

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): B60W30/09B60W40/10B60W50/14B60W10/18B60W10/20
CPCB60W10/18B60W10/20B60W30/09B60W40/10B60W50/14B60W2520/10B60W2552/00B60W2554/801B60W2710/18B60W2710/20
Inventor 丁飞蔡宇婧
Owner NANJING UNIV OF POSTS & TELECOMM
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