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NTIS 바로가기한국측량학회지 = Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, v.38 no.3, 2020년, pp.175 - 185
김의명 (Department of Spatial Information Engineering, Namseoul University) , 서홍덕 (Department of Spatial Information Engineering, Namseoul University)
Three-dimensional registration is a process of matching data with or without a coordinate system to a reference coordinate system, which is used in various fields such as the absolute orientation of photogrammetry and data combining for producing precise road maps. Three-dimensional registration is ...
핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
3차원 등록이란 무엇인가? | 3차원 등록은 서로 다른 좌표계를 갖거나 좌표계가 없는 데이터를 기준 좌표계로 일치시키는 과정으로 사진측량의 절대표정, 정밀도로지도 제작을 위한 데이터 결합 등 다양한 분야에서 사용되고 있다. 3차원 등록은 점을 이용하는 방법과 선형을 이용하는 방법으로 구분이 된다. | |
쿼터니언 기반의 선형을 이용한 3차원 등록 과정은 어떻게 이루어지는가? | 1과 같다. 기준 데이터와 모델 데이터에서 서로 정합되는 선형이 입력데이터로 들어오면 3차원 등록을 위한 매개변수의 초기값을 계산한다. 그리고 나서 쿼터니언을 이용하여 3차원 회전각을 계산하고 그 다음으로 축척과 3차원 이동량을 계산하는 순서로 이루어진다. 따라서, 2. | |
ICP 알고리즘의 문제점은? | 기존의 연구사례를 통해 ICP 알고리즘을 이용할 경우 일정 패턴을 가진 지형일 경우 상호간의 공분산 계산하기 어렵기 때문에 왜곡이 발생할 수 있으며, 점군을 이용하여 3차원 데이터를 등록할 때 중복되는 점들로 인하여 잘못된 공액점을 추출하는 문제가 발생할 수 있다(Lee, 2015; Poreba andGoulette, 2015). |
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