Korean Journal of Remote Sensing (대한원격탐사학회지)

Korean Society of Remote Sensing (대한원격탐사학회)
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Towards the development of an accurate DEM generation system from KOMPSAT-1 Electro-Optical Camera Data

다목적 실용위성 1호기 EOC카메라 영상으로부터 DEM 추출을 위한 시스템개발에 관한 고찰

  • Taejung Kim (Satellite Technology Research Center, Korea Advanced Institute of Science and Technology) ;
  • Heung Kyu Lee (Department of Computer Science, Korea Advanced Institute of Science and Technology)
  • Published : 1998.11.01
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Abstract

The first Korean remote sensing satellite, Korea Multi-Purpose Satellite (KOMPSAT-1), is going to be launched in 1999. This will carry a 7m resolution Electro-Optical Camera (EOC) for earth observation. The primary mission of the KOMPSAT-1 is to acquire stereo imagery over the Korean peninsular for the generation of 1:25,000 scale cartographic maps. For this mission, research is being carried out to assess the possibilities of automated or semi-automated mapping of EOC data and to develop, if necessary, such enabling tools. This paper discusses the issue of automated digital elevation model (DEM) generation from EOC data and identifies some important aspects in developing a DEM generation system from EOC data. This paper also presents the current status of the development work for such a system. The development work will be described in three pares of sensor modelling, stereo matching and DEM interpolation. The performance of the system is shown with a SPOT stereo pair. A DEM generated from commercial software is also presented for comparison. The proposed system seems to generate promising results.

1999년도에 최초의 원격탐사용 국적위성인 다목적 실용위성 1호기가 발사된다. 이 위성에는 해상도 7m영상을 촬영할 수 있는 EOC 카메라가 탑재될 예정이며 이 위성의 주 임무는 이러한 EOC 카메라를 이용하여 1:25,000 축적의 지도제작이 가능한 한반도 전역의 스테레오 영상을 취득하는 것이다. 이 주임무를 위해 EOC 영상으로부터 1:25,000 축적지도제작의 가능성 확인 및 관련 소요기술 개발을 위한 연구과제가 진행 중에 있다. 본 논문에서는 그중에서 특히 EOC 영상으로부터 수치표고모형을 추출하는 문제에 관하여 논의하고자 한다. 먼저 위성영상으로부터 수치표고모형을 제작하는 시스템의 개발에 있어 요구되는 사항들에 관하여 논의한다. 또한 이를 위하여 현재 진행 중인 시스템 개발상태를 보고하고 개발과정에서 수행한 각종 알고리즘들의 성능평가 및 결론을 논의한다. 그리고 SPOT 위성영상을 이용, 상용 소프트웨어와 개발 중인 시스템에서 추출한 수치표고모형을 비교하여 개발 중인 시스템의 성능을 중간진단한다.

Keywords

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