KR20150035304A

KR20150035304A - Train position capturing system using camera and the method thereof

Info

Publication number: KR20150035304A
Application number: KR20130115680A
Authority: KR
Inventors: 채은경; 이강미; 오세찬
Original assignee: 한국철도기술연구원
Priority date: 2013-09-27
Filing date: 2013-09-27
Publication date: 2015-04-06

Abstract

The present invention relates to a video-based train location detection system and a method thereof, and more specifically, to a video-based train location detection system which includes a video recognition system in a railway vehicle for controlling intervals between trains and measuring the location of the train so as to recognize the location and improve accuracy, thereby reducing costs for installation of ground facilities and maintenance, and a method thereof. The present invention comprises: a camera module; location information DB for each route which stores location information of objects; an video information storing and analyzing module which stores video information of the camera module and divides video information into individual image information; video information DB for each location which inserts location information into image information received from the video information storing and analyzing module so as to store image information having the location information; and a location information generation unit which compares the existing image information with real-time image information, and calculates location information based on the results of comparing.

Description

[0001] The present invention relates to an image-based train position detection system and a train position capturing system using the same,

The present invention relates to an image-based train position detection system and method, and more particularly, to an image-based train position detection system and method thereof, And more particularly, to an image-based train position detection system and method for reducing maintenance costs.

Generally, the train control system needs to accurately recognize the train position for the interval control of the train, and the current train position is recognized by using the track circuit, tachometer and RFID.

However, in the method of recognizing the train position using the track circuit or the RFID, the accuracy of the trajectory circuit method can not be confirmed because only the occupation information of the trains in the block section can be confirmed, and when the tachometer is used, And an RFID for calibrating a train position is required, thus requiring the installation and maintenance cost of the ground equipment.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an image-based train position detection system and method which can compare existing image information and real-time image information and accurately calculate position information therefrom.

The present invention relates to a camera module, A location-based location information DB for storing location information of the object; An image information storage and analysis module for storing image information of the camera module and dividing the image information into image information; A positional image information DB for inserting and storing positional information into image information received from the image information storing and analyzing module; And a position information generating unit for comparing the existing image information and the real-time image information, and calculating the position information according to the comparison.

In an exemplary embodiment, the location information generator may include an image information comparison module for comparing the image information of the location-specific image information DB with real-time image information of the camera module; And a train position calculation module for calculating position information of an image judged to match by the image information comparison module.

In one embodiment, the object is a landmark, a pole, and a particular building.

According to an aspect of the present invention, there is provided an image processing method comprising the steps of: rendering image information generated by a camera as a two-dimensional image when generating image information for each position; Inputting position information to the two-dimensional rendered image; Integrating the two-dimensional rendered image and position information and storing the two-dimensional rendered image in a position-specific image information DB; Comparing the image information DB for each position and the real-time image information through the camera when the real-time position is detected; Extracting a specific object of the image to be compared and checking whether the shape and the size match; And generating location information when the specific objects coincide with each other and transmitting the generated location information to the train control system.

According to the present invention, it is possible to precisely measure the position of a train and eliminate the need for a ground facility for measuring the position of a train, so that it is possible to precisely control the train spacing and reduce the cost of constructing and maintaining the ground equipment.

FIG. 1 is a block diagram of an image-based train position detection system according to an embodiment of the present invention. Referring to FIG.
FIG. 2 is a block diagram of an image-based train position detection system according to another embodiment of the present invention. Referring to FIG.
FIG. 3 is a flowchart illustrating a procedure of an image-based train position detection method according to an embodiment of the present invention.

For a better understanding of the present invention, a preferred embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals. Further, detailed descriptions of well-known functions and configurations that may be unnecessarily obscured by the gist of the present invention are omitted.

1 and 2, the present invention includes a camera module 10, a location information DB 25 for each route, an image information storage and analysis module 20, a location-specific image information DB 30, A position information generating unit 40, and the like.

The camera module 10 may be combined with one or more modules for a three-dimensional image camera or a two-dimensional image camera or a two-dimensional image camera.

Also, the three-dimensional image through the camera module 10 can be divided into a two-dimensional image by rendering the two-dimensional image.

Also, the camera module 10 can use an image rendering module and a laser distance detection module for detecting a distance using a laser installed additionally or separately to measure the distance from the mark etc.

Accordingly, the present invention can automatically measure the depth information in the image information of the three-dimensional camera without requiring rendering, so that the train interval control can be easily performed.

The route-specific location information DB 25 is a database for storing location information of an object, and includes a module function, and the object is preferably a landmark, a pole, and a specific building.

The image information storage and analysis module 20 is a module for storing image information of the camera module 10 and dividing the image information into image information, and may include an image rendering module and the like.

The location-specific image information DB 30 is a database for inserting and storing location information into the image information received from the image information storing and analyzing module 20, and the location information includes location information for each route, Information for estimating the train position in advance or can use the accurate position information generated in the GPS module 25 '.

The location information generation unit 40 is a module for comparing existing image information with real-time image information and calculating location information according to the obtained location information, and can use location information for a prefecture or a specific building for each route.

That is, the position information generator 40 compares the image information with the real-time image information generated by the camera module 10, and calculates the position information in the image information DB for each position according to the matching image information.

The position information generator 40 may include an image information comparing module 42 for comparing the image information of the position-based image information DB 30 and the real-time image information obtained by imaging the image information of the camera module 10, And a train position calculation module 44 for calculating position information of an image determined to match in the image information comparison module.

Alternatively, as another embodiment of the present invention, the depth information can be extracted from the image information of the three-dimensional camera to measure the distance between the train mark, the pole, and the specific building, and thus the position of the train can be accurately measured .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an image-based train position detection method according to the present invention will be described in detail with reference to the drawings.

As shown in FIG. 3, when the image information for each position is generated, the image information generated by the camera is rendered as a two-dimensional image (S101, S108).

Here, a method of extracting depth information from the image information of the 3D camera may be used.

Then, the position information is input to the two-dimensional rendered image (S109). In this case, the two-dimensional rendered image information and the position information are preferably stored in the same database.

Then, the two-dimensional rendered image and the position information are integrated and stored in a position-specific image information DB (S110).

On the other hand, when detecting the real-time position, the positional-based image information DB and the real-time image information through the camera are imaged and compared (S103).

If it is determined that the objects match, the position information is generated and transmitted to the train control system to accurately measure the position of the train (S104, S105) , S106, S107).

The embodiments of the image-based train position detection system of the present invention described above are merely illustrative and those skilled in the art will appreciate that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. .

Therefore, it is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims. It is also to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

10: Camera module
20: Image information storage and analysis module
25: Location information DB by route
25 ': GPS module
30: Image information DB by location
40: Position information generating unit
42: Image information comparison module
44: Train position calculation module

Claims

A camera module;
A location-based location information DB for storing location information of the object;
An image information storage and analysis module for storing image information of the camera module and dividing the image information into image information;
A positional image information DB for inserting and storing positional information into image information received from the image information storing and analyzing module; And
A position information generating unit for comparing the image information with real-time image information generated by the camera module, and calculating position information in the position-based image information DB according to the matching image information;
Wherein the image-based train position detection system comprises:

The method according to claim 1,
Wherein the position information generating unit comprises:
An image information comparison module for comparing image information of the position-based image information DB with real-time image information of the camera module; And
And a train position calculation module for calculating position information of an image determined to be matched by the image information comparison module.

The method according to claim 1,
Wherein the object is a landmark, a pole, and a specific building.

Rendering the image information generated by the camera as a two-dimensional image when generating the image information for each position;
Inputting position information to the two-dimensional rendered image;
Integrating the two-dimensional rendered image and position information and storing the two-dimensional rendered image in a position-specific image information DB;
Comparing the image information DB for each position and the real-time image information through the camera when the real-time position is detected;
Extracting a specific object of the image to be compared and checking whether the shape and the size match; And
Generating location information when the specific objects coincide with each other, and transmitting the generated location information to the train control system;
And detecting the position of the train.