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논문 기본 정보

자료유형
학술저널
저자정보
Changyul Lee (Korea Maritime and Ocean University) Kideok Do (Korea Maritime and Ocean University) Inho Kim (Kangwon National University) Sungyeol Chang (Haeyeon Engineering and Consultants Corporation)
저널정보
한국해양공학회 한국해양공학회지 한국해양공학회지 제38권 제4호(통권 제179호)
발행연도
2024.8
수록면
174 - 186 (13page)

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초록· 키워드

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In coastal video monitoring, the direct linear transform (DLT) method with ground control points (GCPs) is commonly used for geo-rectification. However, current practices often overlook the impact of GCP quantity, arrangement, and the geographical characteristics of beaches. To address this, we designed scenarios at Chuam Beach to evaluate how factors such as the distance from the camera to GCPs, the number of GCPs, and the height of each point affect the DLT method. Accuracy was assessed by calculating the root mean square error of the distance errors between the actual GCP coordinates and the image coordinates for each setting. This analysis aims to propose an optimal GCP placement method. Our results show that placing GCPs within 200 m of the camera ensures high accuracy with few points, whereas positioning them at strategic heights enhances shoreline extraction. However, since only fixed cameras were used in this study, factors like varying heights, orientations, and resolutions could not be considered. Based on data from a single location, we propose an optimal method for GCP placement that takes into account distance, number, and height using the DLT method.

목차

ABSTRACT
1. Introduction
2. Data Acquisition
3. Image Data Processing
4. Research Method and Results
5. Discussion
6. Conclusion
References

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