Journal of the Society of Disaster Information (한국재난정보학회 논문집)

The Korean Society of Disaster Information (한국재난정보학회)
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Development of Automatic Crack Detection using the Gabor Filter for Concrete Structures of Railway Tracks

가버 필터를 사용한 철도 콘크리트 궤도 도상의 자동 균열 감지 개발

  • Received : 2018.11.15
  • Accepted : 2018.12.13
  • Published : 2018.12.31
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Abstract

Purpose: Concrete track that affects on railway safety can detect cracks using image processing technique. However, since a condition of concrete track and surface noisy are obstructed to detect cracks, there is a need for a way to remove them effectively. Method: In this study, we proposed an image processing to detect cracks effectively for Korean railway and verified its performance through experiment. We developed image acquisition system for capture a railway concrete track and acquired railway concrete track images, randomly selected 2000 images and detected cracks in the image process using proposed Gabor Filter Bank methods. Results: As a result, 94% of detection rate are matched to the actual cracks in same quality and format railway concrete track image. Conclution: The crack detection method using Garbor Filter Bank was confirmed to be effective for crack image including noise in the Korean railway concrete track. This system is expected to become an automated maintenance system in the existing human-centered railway industry.

연구목적: 철도 안전에 영향을 미치는 콘크리트 궤도는 이미지분석 기술을 사용하여 균열을 감지 할 수 있으나 균열을 검출하기 위한 콘크리트 궤도 및 표면 오염의 조건이 균열검측에 방해되므로 이를 효과적으로 제거하기 위한 방법이 필요하다. 연구방법: 본 연구에서는 한국 철도의 균열을 효과적으로 감지하기 위한 이미지 분석 기법을 적용한 프로세스를 제안하고 실험 모듈을 통해 취득된 이미지를 분석하여 성능을 검증하였다. 또한, 우리는 제안된 Gabor Filter Bank 기법을 사용하여 철도 콘크리트 도상 이미지를 획득한 데이터 중 무작위로 선택된 2000개의 이미지를 개발된 프로세스를 통해 자동 균열 검측을 수행하여 타당성을 검토하였다. 연구결과: 연구에서 제안된 시스템으로 균열 검측 결과 탐지율이 약 94% 성능으로 검토되었으며 취득된 철도콘크리트도상이미지의 균열이 동일한 크기와 형식으로 일치하였다. 결론: Gabor Filter Bank를 사용한 균열 검측법은 한국 철도의 콘크리트 궤도도상에 노이즈를 포함한 균열 이미지에 효과적으로 분석되는 것을 확인 할 수 있었다. 이 시스템은 기존의 인간 위주의 철도 산업에서 자동화 된 유지 관리 시스템이 될 수 있을 것으로 기대된다.

Keywords

JNJBBH_2018_v14n4_458_f0001.png 이미지

Fig. 1 Automatic crack detection process flowchart.

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Fig. 2 Image acquisition system for capture a railway concrete track

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Fig. 3 Gausian filters factor from Gabor Filter Bank

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Fig. 4 ACTCAS Program for capture a railway concrete track

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Fig. 5 Experimental results from the proposed automatic crack detection process

Table 1. Results of evaluation of the automatic crack detection process

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