Vehicle positioning method based on coded graphics

A technology of encoding graphics and vehicle positioning, applied in the field of visual navigation, can solve the problems of not being able to obtain the current position information of the vehicle, slope and superelevation information, etc.

Inactive Publication Date: 2015-05-06
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the current technology is that based on this uncoded solid line or dotted line, the current position information of the vehicle cannot be obtained, and thus the slope and superelevation information of the current road surface cannot be obtained. The information such as slope and superelevation is helpful for more accurate Control the vehicle to drive automatically

Method used

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  • Vehicle positioning method based on coded graphics

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Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1: The above-mentioned road information is coded, and the data parameters in the above-mentioned road information are used as coded values. Generate a coded graphic corresponding to the above coded value; the coded graphic can be a custom matrix two-dimensional code, or a matrix two-dimensional code such as QR two-dimensional code, PDF417 two-dimensional code, Data Matrix two-dimensional code, or a Dimensional barcodes, Arabic numerals, etc. In order to improve the recognition accuracy and reliability, an error correction code can be added according to a certain algorithm when the coded value is generated into a coded pattern.

[0023] Draw the above coded graphics on the road surface at the corresponding position; there may be some errors during the construction process, and the error value can be recorded after measurement to improve the accuracy.

[0024] Such as figure 1 As shown, a camera is installed on the front or side of the car body, the camera is...

Embodiment 2

[0026] Embodiment 2: sequence number is compiled to each section road of predetermined route; Record the road information of each section road corresponding to each sequence number, comprise location information; With above-mentioned sequence number as coded value, generate the coded pattern corresponding to coded value one by one; In order to improve Recognition accuracy and reliability, when the coded value is generated into a coded pattern, an error correction code can be added according to a certain algorithm; in order to narrow the value range of the coded value, reduce the complexity of the pattern code, and improve the recognition rate, it can be combined with other positioning methods such as GPS Combined, numbers outside a certain distance range can be repeated. Draw the above coded graphics on the road at the corresponding position; when the vehicle is driving, the camera installed on the vehicle captures the image of the coded graphics on the current road; identify t...

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Abstract

The invention discloses a vehicle positioning method based on coded graphics. The method comprises the following steps: extracting road information on each road section on a predetermined route in advance, wherein the road information comprises the position information of each road section; endowing the road information of each road section with a corresponding coded value; generating coded graphics which correspond to the coded values one by one; drawing the coded graphics on the road surface at corresponding positions; photographing images of the coded graphics on the current road surface by virtue of a camera arranged on the vehicle during vehicle running; identifying the coded values which correspond to the images; acquiring road information of the road surface which corresponds to the coded value, wherein the road information comprises the position information of the road section, and the vehicle is positioned. With the adoption of the positioning method based on coded graphics, the current position information of the vehicle in vehicle navigation can be acquired, and automatic running of vehicles is accurately controlled.

Description

technical field [0001] The invention relates to the technical field of visual navigation, in particular to a vehicle positioning method based on coded graphics. Background technique [0002] The visual navigation method provides guidance for the vehicle through the method of visual image processing. Visual navigation has the advantages of high flexibility and adaptability to various scenarios. It is a very potential navigation method. The current visual navigation method is to draw solid or dotted lines along a fixed route. For example, the camera-based competition in the "Freescale" smart car competition uses dotted or solid lines (Zhang Shuangxi, Wang Jinyang, Ding Lei, etc. Based on Freescale Design and implementation of dual-line route recognition for single-chip smart cars [J]. Journal of Shandong Jiaotong University, 2013, 20(4): 14-17.); and the use of double dashed lines for optical-based guided buses (New Era Hi-tech Buses. http: / / citytransport.info / Buses03.htm. 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/26G01C21/36
CPCG01C21/26G01C21/3602
Inventor 江永全张卫华陈锦雄彭强权伟
Owner SOUTHWEST JIAOTONG UNIV
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