Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method and system of video frequency velometer

A technology of field of view and speed, applied in parts of TV systems, traffic control systems, devices using optical methods, etc., can solve problems such as accuracy less than ±1km/h, influence, and difficulty in obtaining accurate data

Inactive Publication Date: 2007-05-16
王海燕
View PDF0 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Close-range speed measurement is seriously affected by the vehicle model. If it is installed on a fixed gantry and looked down for measurement, it is difficult to obtain accurate data, and the accuracy cannot reach ±1km / h

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
  • Method and system of video frequency velometer
  • Method and system of video frequency velometer
  • Method and system of video frequency velometer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] Referring to Fig. 3 below is that the inventive method is described further, and the concrete content of its main part is as follows:

[0021] 1. Average instantaneous position velocity

[0022] 1.1 field of view

[0023] Figure 1 illustrates.

[0024] Frame image 768×576

[0025] Field image 768×288

[0026] Thin line 384 or 256

[0027] Li = 384 4 = 96

[0028] Mi=64→128(to be determined)

[0029] 1.2 Motion detection

[0030] The camera is fixed on the pole in the air, overlooking the lanes, as shown in Figure 1, the number of lanes can be 2-4. The commonly used moving target detection method is the difference method. The difference method is to extract the target information by using the gray level difference of the image pixels of two adjacent frames or fields. For the stable part in the continuous image, its gray value is approximately 0, while the moving part shows 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

This invention relates to visual frequency speed testing method, which comprises the following steps: testing movement, track description; even speed computer, super speed judging and car flow statistics and is based on movement test technique according to image process technique, image trace technique and computer technique. This invention uses hardware platform as cameral machine and computer hardware to realize this invention widely used in road automotive speed testing and other situations.

Description

technical field [0001] The invention is developed according to motion detection technology, target image tracking technology and computer technology in the field of image processing technology, and the speed measurement accuracy can reach ±1km / h. Background technique [0002] With the rapid development of the country's economy, the construction of expressways in our country is changing with each passing day. The density of vehicles driving on the highway is getting bigger and bigger, and the speed is getting faster and faster. The cases of speeding traffic accidents are on the rise. This has become an urgent problem for the traffic department to solve. [0003] At present, the speed measurement systems that can be completed include: radar speed measurement, laser speed measurement and video speed measurement. The principles are as follows: [0004] (1) Laser speed measurement [0005] Laser speed measurement uses the ratio of multiple distance measurements to time to measu...

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): G08G1/01G08G1/052G08G1/054G08G1/065H04N5/14G01P3/36
Inventor 王海燕
Owner 王海燕
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap 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