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이미지 처리를 이용한 슬라브 표면 핀홀 결함 검출 기법

Title
이미지 처리를 이용한 슬라브 표면 핀홀 결함 검출 기법
Authors
최두철
Date Issued
2010
Publisher
포항공과대학교
Abstract
In this paper, we introduce an image-processing algorithm that detects pinholes in steel slabs. Because the pinhole is relatively small and similar to noise components, it is difficult to distinguish pinhole from a steel slab surface. To increase detection accuracy, we propose a new algorithm for pinhole detection. We applied Gabor filters to extract defect candidates and subsequently developed a mask to score the specific features of each pinholes. The performance of the proposed algorithm was evaluated on 1764 subimages
116 of these images had pinholes, and the rest of the images were free of defects. The proposed algorithm has 87.1% accuracy for the detection of pinhole images and false alarm is 3.8%.
URI
http://postech.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000000563482
http://oasis.postech.ac.kr/handle/2014.oak/655
Article Type
Thesis
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