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논문 기본 정보

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학위논문
저자정보

이종혁 (경북대학교, 경북대학교 대학원)

지도교수
김민영.
발행연도
2019
저작권
경북대학교 논문은 저작권에 의해 보호받습니다.

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이 논문의 연구 히스토리 (2)

초록· 키워드

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제조업 분야에서 제품의 품질 향상을 위하여 제품의 결함을 발견하는 작업은 매우 중요하다. 자동화 시스템 개발로 인하여 영상처리 및 인공지능을 이용한 결함검사 시스템이 많이 발전되고 이에 따라 결함 검사를 위한 조명 시스템 또한 발전하고 있지만, 표면의 빛 반사가 심한 주조물의 경우 조명에 따라 결함 정확도 저하와 같은 문제점이 발생되고 있다. 본 논문에서는 이러한 문제들을 해결하기 위해 phtometric stereo 기법의 조명 시스템을 설계하여 획득한 데이터를 인공지능에 적용한 자동 결함 탐지 시스템을 제안한다.

목차

Ⅰ. Introduction····················································· 1
1.1 Research background···································· 1
1.2 Defect detection system································ 4
1.3 Research purpose and summary···················· 8
Ⅱ. Imaging System················································9
2.1 Photometric stereo·········································9
2.2 Overview of Photometric stereo···················10
2.3 Optical system configuration························11
Ⅲ. Defect detection deep-learning model···········13
3.1 Overview of Neural Network························13
3.2 CNN-based defect detection model·············16
3.2.1 CNN model···············································16
3.2.2 YOLO model·············································19
3.3 Proposed defect detection model·················21
3.3.1 Proposed model·······································21
3.3.2 Performance enhancement model···········23
Ⅳ. Experiments and Results································25
4.1 Experiment environment and setting···········25
4.1.1 Definition of surface defects ···················25
4.1.2 Ground truth dataset ······························26
4.1.3 Experiment environment ·························28
4.2 Defect detection result·································33
4.2.1 Definition of performance metric············38
4.2.2 Quantitative measurement······················41
Ⅴ. Conclusion and Future work··························47
R e f e r e n c e s··················································49
A b s t r a c t ·······················································54

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