A Sleeper Positioning and Counting Method Based on Multi-area Grayscale Projection in Line Array Image

A technology of gray-scale projection and linear array image, which is applied in image data processing, image analysis, image enhancement, etc., can solve the problems of poor reliability and low precision, achieve easy storage and management, high-precision mileage counting, and increase beneficial information Effect

Active Publication Date: 2021-11-02
成都精工华耀科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a railway sleeper positioning and counting method for high-precision mileage counting in rail transit automatic inspection systems to solve the problems of low precision and poor reliability in existing mileage counting methods

Method used

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  • A Sleeper Positioning and Counting Method Based on Multi-area Grayscale Projection in Line Array Image
  • A Sleeper Positioning and Counting Method Based on Multi-area Grayscale Projection in Line Array Image
  • A Sleeper Positioning and Counting Method Based on Multi-area Grayscale Projection in Line Array Image

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Experimental program
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Effect test

Embodiment 1

[0069] Embodiment 1: use the number of square waves in the joint projection curve to count sleepers.

[0070] Step 1: Take the qth track two-dimensional image I, and select K detection areas {R 1 ...R K}, the value range of K is 1~10, in the specific implementation process, take K=3, such as Image 6 As shown, respectively for K detection areas {R 1 ...R K} to perform horizontal projection on the pixel values ​​to obtain K horizontal projection curves {S 1 ... S K}, detection area R 2 The corresponding horizontal projection curve S 2 like Figure 7 shown. The heights of the K detection areas are equal, and only sleepers are included in the detection area, fasteners and rails are not included;

[0071] Step 2: For K horizontal projection curves {S 1 ... S K} for fusion to obtain the joint projection curve S′;

[0072] Step 3: Use the adaptive threshold method to binarize the joint projection curve S′ to obtain the binarized curve B, such as Figure 10 shown;

[00...

Embodiment 2

[0081] Embodiment 2: counting sleepers by using the number of crests or troughs in the first derivative of the joint projection curve.

[0082] Utilize the linear array imaging system to acquire Q two-dimensional images of tracks containing sleepers, and sequentially perform the following processing on the Q two-dimensional images of tracks:

[0083] Step 1: Take the qth track two-dimensional image I, and select K detection areas {R 1 ...R K}, K ranges from 1 to 100, in the actual implementation process, K = 3, respectively for K detection areas {R 1 ...R K} to perform horizontal projection on the pixel values ​​to obtain K horizontal projection curves {S 1 ... S K}. The heights of the K detection areas are equal, and only sleepers are included in the detection area, fasteners and rails are not included;

[0084] Step 2: For K projection curves {S 1 ... S K} for fusion to obtain the joint projection curve S′;

[0085] Step 3: Perform first-order differential filtering...

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Abstract

The invention discloses a sleeper positioning and counting method based on a multi-area grayscale projection of a line array image, which belongs to the field of rail detection. The method includes the following steps: using a linear array imaging system to perform linear array scanning imaging on the track surface along the advancing direction of the train or the detection platform to obtain a linear array image including sleepers; setting multiple detection areas in the sleeper area of ​​the line array image, and in each detection area Perform horizontal projection of the gray value of the image to obtain multiple horizontal projection curves; filter and smooth the multiple horizontal projection curves and then fuse them to obtain a joint projection curve; then according to the number of square waves in the joint projection curve or the first derivative of the joint projection curve The number of peaks or troughs is used as sleeper count. After the sleeper is positioned and counted by the method of the present invention, high-precision mileage counting can be realized, and precise position information can be provided for the track inspection system, which facilitates accurate positioning of track inspection results and quick search in later maintenance.

Description

technical field [0001] The invention relates to the technical field of rail detection, in particular to a method for locating and counting sleepers of linear array images based on multi-region grayscale projection. Background technique [0002] Rail transportation includes ordinary railways, high-speed railways, subways, etc., and plays an important role in the development of the national economy and people's daily life. In order to ensure the safety of rail transit operation, the rail transit operation department needs to conduct regular inspections on rail safety. Specific inspection contents include: rail geometric parameter detection, abnormal detection of rail fasteners loose, missing, cracks, etc., rail wear detection, pantograph-catenary line detection, foreign object detection on the road surface, etc. [0003] At present, the detection of rail geometric parameters mainly uses inertial navigation system and laser image measurement system for automatic detection of t...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G06T7/73
CPCG06T2207/20024G06T2207/30236G06T2207/30242G06T7/73
Inventor不公告发明人
Owner成都精工华耀科技有限公司