Journal of Cadastre & Land InformatiX (지적과 국토정보)

LX Spatial Information Research Institute (한국국토정보공사 공간정보연구원)
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Accuracy Assessment on the Stereoscope based Digital Mapping Using Unmanned Aircraft Vehicle Image

무인항공기 영상을 이용한 입체시기반 수치도화 정확도 평가

  • 윤공현 (연세대학교 공학연구원) ;
  • 김덕인 ((주)지오스페이스) ;
  • 송영선 (인하공업전문대학 항공지리정보과)
  • Received : 2018.05.04
  • Accepted : 2018.06.27
  • Published : 2018.06.30
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Abstract

RIn this research, digital elevation models, true-ortho image and 3-dimensional digital complied data was generated and evaluated using unmanned aircraft vehicle stereoscopic images by applying photogrammetric principles. In order to implement stereoscopic vision, digital Photogrammetric Workstation should be used necessarily. For conducting this, in this study GEOMAPPER 1.0 is used. That was developed by the Ministry of Trade, Industry and Energy. To realize stereoscopic vision using two overlapping images of the unmanned aerial vehicle, the interior and exterior orientation parameters should be calculated. Especially lens distortion of non-metric camera must be accurately compensated for stereoscope. In this work. photogrammetric orientation process was conducted using commercial Software, PhotoScan 1.4. Fixed wing KRobotics KD-2 was used for the acquisition of UAV images. True-ortho photo was generated and digital topographic map was partially produced. Finally, we presented error analysis on the generated digital complied map. As the results, it is confirmed that the production of digital terrain map with a scale 1:2,500~1:3,000 is available using stereoscope method.

본 연구에서는 무인항공기(UAV:Unmanned Aircraft Vehicle)의 입체영상을 이용하여 사진측량학 원리를 적용하므로서 수치표고모형, 실감정사영상 및 3차원 수치 데이터를 제작 및 평가를 수행하였다. 스테레오 입체시를 수행하기 위해서는 수치도화기(DPW:Digital Photogrammetric Workstation)를 필수적으로 이용해야 하는데 본 연구에서는 최근 산자부에서 개발된 3차원 공간정보 제작시스템인 GEOMAPPER 1.0을 사용하였다. 무인항공기의 중복된 두 영상을 이용하여 입체시 생성하기 위해서는 카메라의 내부표정요소와 외부표정요소가 계산되어야 하며, 정확한 입체시를 위해서 비항측용 일반 카메라의 렌즈왜곡에 대한 정확한 보정이 필수적이다. 렌즈의 왜곡보정 및 지상기준점을 이용한 표정요소의 결정은 상업용 소프트웨어인 PhotoScan 1.4를 사용하였다. 무인항공기는 케이로보틱스의 고정익 장비(KD-2)를 사용하였고 항공삼각측량과정을 통하여 최종적으로 실감정사영상을 생성하고 수치지형도를 일부 제작하여 수치도화의 오차분석을 수행하였다. 그 결과 입체도화 방식으로 축척 1:1/2,500~1/3,000 수치지형도의 제작 가능성을 확인 할 수 있었다.

Keywords

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