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논문 기본 정보

자료유형
학술저널
저자정보
공예슬 (Chonnam National University) Yinan Miao (Chonnam National University) 전준영 (Chonnam National University) 박규해 (Chonnam National University)
저널정보
한국소음진동공학회 한국소음진동공학회논문집 한국소음진동공학회논문집 제31권 제4호(통권 261호)
발행연도
2021.8
수록면
408 - 418 (11page)
DOI
10.5050/KSNVE.2021.31.4.408

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초록· 키워드

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The advanced displacement measurement technique using computer vision has shown several advantages, such as a high spatial resolution and no mass loading effect, compared to the conventional contact-sensing techniques. However, the accuracy and robustness of vision-based techniques are subjected to various illumination conditions, including uneven illumination and insufficient lighting. This study introduced an accurate displacement measurement technique, with high robustness with respect to the illumination changes, that used two complex Gabor filters and a specially designed marker with orthogonal features. The parameters of the two complex Gabor filters, including the center frequency, bandwidth, and direction, were selected based on the marker size and attitude to extract the accurate phase motion information on two directions with dense features. The noise caused by insufficient light and/or uneven illumination could also be reduced by emphasizing the orthogonal features using the proper filter parameters. Further, motion phase-based optical flow was applied to calculate the 2D displacement signal of the marker. The excellent performance of displacement measurement was confirmed by comparing to that by a laser doppler vibrometer(LDV) under various lighting conditions. Tracking of multiple markers on a plate was performed to demonstrate the capability of measuring the out-plane motion using the proposed technique.

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ABSTRACT
1. 서론
2. 마커 영상 위상 기반 구조물 변위 측정 기법
3. 실험적 검증
4. 결론
References

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