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

Method and apparatus for measuring vehicle distance and automobile

A measurement method and measurement device technology, which is applied in the directions of measurement device, photogrammetry/video measurement, surveying and navigation, etc. It can solve the problem that millimeter wave radar is easily interfered by electromagnetic waves, the cost of laser technology is high, and the distance of ultrasonic measurement is short. problems, to achieve the effect of stable performance, large measurement range, fast and accurate detection and positioning

Active Publication Date: 2013-06-12
SHENZHEN TCL IND RES INST
View PDF7 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiment of the present invention is to provide a vehicle distance measurement method and device, which aims to solve the problem that the ultrasonic measurement distance in the prior art is relatively short, the millimeter wave radar is relatively easy to be interfered by electromagnetic waves, and the cost of laser technology is too high

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 apparatus for measuring vehicle distance and automobile
  • Method and apparatus for measuring vehicle distance and automobile
  • Method and apparatus for measuring vehicle distance and automobile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] figure 1 Shows a flow chart of the realization of the vehicle distance measurement method provided in the first embodiment of the present invention, which is detailed as follows:

[0051] In S101, the two cameras of the binocular vision system are used to simultaneously collect images of the scene in front of the current vehicle.

[0052] In the embodiment of the present invention, two cameras can be added to the front end of the current vehicle, and the installation position of the camera can be located on the upper part of the front windshield or the front of the vehicle, such as figure 2 Shown is a schematic diagram of a typical installation position of the camera on the vehicle. The two cameras can realize the synchronous collection of images, and the collected images are handed over to the measurement system for subsequent processing.

[0053] In S102, the candidate license plate area in the image collected by each camera is obtained, and the feature vector corresponding ...

Embodiment 2

[0066] Figure 4 Shows a flow chart of the realization of the vehicle distance measurement method provided in the second embodiment of the present invention, which is detailed as follows:

[0067] In S401, the two cameras of the binocular vision system are calibrated.

[0068] In this embodiment, by calibrating the two cameras of the binocular vision system, the internal and external parameters of the two cameras and the relative spatial positions of the two cameras can be obtained respectively (wherein, it can be characterized by a rotation matrix and a translation matrix). Specifically, the two-step (Radial Alignment Constraint, RAC) method can be used for calibration. The camera can be calibrated only once, without repeating the calibration every time it is used. The obtained calibration parameters can be stored in the internal memory of the measurement system. , To be called when calculating the distance between the current vehicle and the vehicle in front.

[0069] In S402, two...

Embodiment 3

[0091] Picture 10 The structure diagram of the distance measuring device provided by the third embodiment of the present invention is shown. For ease of description, only the parts related to the embodiment of the present invention are shown. The device may be a software unit, a hardware unit, or a built-in vehicle in the car. Soft and hard unit.

[0092] In this embodiment, the device includes: an acquisition unit 101, an acquisition unit 102, a judgment unit 103, a first calculation unit 104, and a second calculation unit 105.

[0093] The acquisition unit 101 is used to synchronously acquire an image of the current scene in front of the vehicle through the two cameras of the binocular vision system;

[0094] The acquiring unit 102 is configured to acquire candidate license plate regions in the images collected by each camera, and extract a feature vector corresponding to each candidate license plate region;

[0095] The judging unit 103 is used to judge whether the candidate licen...

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, which is suitable for the machine vision field, provides a method and apparatus for measuring a vehicle distance and an automobile. The method comprises the following steps that: two cameras of a binocular vision system are used to collect images of scenes in front of a current vehicle synchronously; a candidate license plate region in the image collected by each of the cameras is obtained and a feature vector corresponding to each candidate license plate region is extracted; whether the candidate license plate region corresponding to each of the feature vectors is a real license plate region; a center position of the real license plate region is calculated; and according to the center position as well as a binocular stereo vision measurement principle, a distance between the current vehicle and a vehicle in front of the current vehicle is calculated. According to the invention, rapid and accurate detection and positioning on an automobile license plate in a complex background image is realized; and the distance between the current vehicle and a vehicle in front of the current vehicle in the vision angle range of the camera is calculated. The measurement range is large; and the measuring process can be realized simply and conveniently; and the performance for measurement is stable.

Description

Technical field [0001] The invention belongs to the technical field of machine vision, and particularly relates to a vehicle distance measurement method, device and automobile. Background technique [0002] With the advent of the era of high-speed transportation, cars have become an indispensable and common means of transportation in people’s lives. However, car accidents have also risen sharply, and car collision accidents are mostly caused by too fast driving, too small driving distance, and untimely braking. Yes, especially in driving a car, if the driver is overly tired or loses concentration, it is more likely to cause the vehicle on his side to be too close to the vehicle in front, which will lead to accidents due to lack of time. In order to reduce the rate of such accidents, the distance between the vehicle in front and the vehicle in front can be measured by the front vehicle distance measuring device, and the driver will be warned when the distance is too close to impro...

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): G01C11/00G01C11/04
Inventor 陈永洒吴美芬邵诗强
Owner SHENZHEN TCL IND RES INST
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