Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Vehicle speed detection method based on target motion track

A vehicle speed and detection method technology, applied in the field of intelligent transportation, can solve the problem of low accuracy of vehicle speed

Active Publication Date: 2015-01-14
CHINA SHIPPING NETWORK TECH
View PDF2 Cites 69 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a vehicle speed detection method based on the target motion trajectory to solve the problem of low accuracy in the detection of vehicle speed by road monitoring video in the prior art

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
  • Vehicle speed detection method based on target motion track
  • Vehicle speed detection method based on target motion track
  • Vehicle speed detection method based on target motion track

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0123] The vehicle speed detection method based on the target motion track of the present invention comprises three steps, which are target segmentation, target tracking based on Kalman filter and speed calculation in sequence. The specific implementation is as follows:

[0124] 1. Target segmentation

[0125] This method uses the inter-frame difference method and the fixed threshold method to segment moving objects, and its main implementation process is as follows:

[0126] 1 frame difference method

[0127] The so-called inter-frame difference method refers to the method of obtaining the contour of the moving target by performing differential operations on the corresponding pixels in adjacent frames in the video image sequence. The algorithm is implemented as follows:

[0128] pDifImg[i]=abs(pNowImg[i]-pBefImg[i]),i=0...W*H (1)

[0129] In the above formula,

[0130] pDifImg[i]——gray value of frame difference result;

[0131] pNowImg[i]——the gray value of the current f...

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 vehicle speed detection method based on a target motion track. The method includes the steps of target segmentation, target tracking conducted on the basis of Kalman filtering and speed calculation, wherein the combination of an inter-frame difference method and a fixed threshold value method is mainly adopted in target segmentation, and a segmentation result is acquired; target tracking conducted on the basis of Kalman filtering is divided into the processes of mass center acquisition, motion model establishment, motion target feature extraction and state vector updating, and therefore the target motion track is acquired; a speed calculation method mainly refers to track related point information acquisition, mapping relation establishment, speed calculation and speed correction, the mapping relation establishment mainly refers to conversion from pixel coordinates in an image to actual distances, in other words, the actual distance, corresponding to an actual coordinate system, of each pixel point in the image is calculated, speed calculation mainly refers to calculation of related information provided by the vehicle track in the mode that the distances are divided by time according to a speed calculation formula and a result is corrected according to the actual condition.

Description

technical field [0001] The invention belongs to the technical field of intelligent transportation, in particular to a vehicle speed detection method based on a target motion track. Background technique [0002] The ubiquitous car speeding problem not only increases the work difficulty of the traffic supervision department, but also the casualty accidents caused by car speeding also happen from time to time. For this reason, it is necessary to detect the driving speed of the vehicle and automatically identify the license plate number, so as to further automate and intelligentize the vehicle management. [0003] To realize traffic intelligence, it is necessary to obtain comprehensive and accurate traffic information, including real-time traffic parameter information such as traffic volume, vehicle speed, and vehicle type. According to these traffic information, traffic accidents can be dealt with in time, and when necessary, guidance information should be sent to guide traffi...

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): G06T7/00G06T7/20
CPCG06T7/215G06T7/251G06T2207/20024
Inventor 袁彬谭中慧于艳玲
Owner CHINA SHIPPING NETWORK TECH
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
Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com