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학술지 Deep visual domain adaptation and semi-supervised segmentation for understanding wave elevation using wave fume video images
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저자
김진아, 김태경, 오상호, 도기덕, 유준규, 김재일
발행일
202111
출처
Scientific Reports, v.11, pp.1-12
ISSN
2045-2322
출판사
Nature Research
DOI
https://dx.doi.org/10.1038/s41598-021-01157-x
협약과제
22HH3800, 저궤도 초소형위성(10kg 급) 기반 글로벌 IoT 서비스를 위한 저전력 위성다중액세스 핵심기술개발, 유준규
초록
Accurate water surface elevation estimation is essential for understanding nearshore processes, but it is still challenging due to limitations in measuring water level using in-situ acoustic sensors. This paper presents a vision-based water surface elevation estimation approach using multi-view datasets. Specifically, we propose a visual domain adaptation method to build a water level estimator in spite of a situation in which ocean wave height cannot be measured directly. We also implemented a semi-supervised approach to extract wave height information from long-term sequences of wave height observations with minimal supervision. We performed wave flume experiments in a hydraulic laboratory with two cameras with side and top viewpoints to validate the effectiveness of our approach. The performance of the proposed models were evaluated by comparing the estimated time series of water elevation with the ground-truth wave gauge data at three locations along the wave flume. The estimated time series were in good agreement within the averaged혻correlation coefficient of 0.98 and 0.90 on the measurement and 0.95 and 0.85 on the estimation for regular and irregular waves, respectively.
KSP 제안 키워드
Acoustic Sensor, Flume experiments, In-Situ, Irregular waves, Multi-view, Nearshore processes, Semi-supervised, Time series, Water level, Wave flume, Wave height
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