Korean Journal of Remote Sensing (대한원격탐사학회지)

Korean Society of Remote Sensing (대한원격탐사학회)
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Extraction of 3D Building Information by Modified Volumetric Shadow Analysis Using High Resolution Panchromatic and Multi-spectral Images

고해상도 전정색 영상과 다중분광 영상을 활용한 그림자 분석기반의 3차원 건물 정보 추출

  • Lee, Taeyoon (Satellite Information Research Center, Korea Aerospace Research Institute) ;
  • Kim, Youn-Soo (Satellite Information Research Center, Korea Aerospace Research Institute) ;
  • Kim, Taejung (Department of Geoinformatic Engineering, Inha University)
  • 이태윤 (한국항공우주연구원 위성정보연구센터) ;
  • 김윤수 (한국항공우주연구원 위성정보연구센터) ;
  • 김태정 (인하대학교 지리정보공학과)
  • Received : 2013.09.03
  • Accepted : 2013.10.17
  • Published : 2013.10.31
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Abstract

This article presents a new method for semi-automatic extraction of building information (height, shape, and footprint location) from monoscopic urban scenes. The proposed method is to expand Semi-automatic Volumetric Shadow Analysis (SVSA), which can handle occluded building footprints or shadows semi-automatically. SVSA can extract wrong building information from a single high resolution satellite image because SVSA is influenced by extracted shadow area, image noise and objects around a building. The proposed method can reduce the disadvantage of SVSA by using multi-spectral images. The proposed method applies SVSA to panchromatic and multi-spectral images. Results of SVSA are used as parameters of a cost function. A building height with maximum value of the cost function is determined as actual building height. For performance evaluation, building heights extracted by SVSA and the proposed method from Kompsat-2 images were compared with reference heights extracted from stereo IKONOS. The result of performance evaluation shows the proposed method is a more accurate and stable method than SVSA.

각종 센서 정보에 기반한 3차원 건물 정보 추출 방법은 건물 형태를 보다 상세하게 묘사할 수 있지만 많은 비용 및 복잡한 처리가 요구된다. 단일 고해상도 영상에 기반한 방법은 추출할 수 있는 3차원 건물 정보가 비교적 제한적이지만 낮은 비용과 단순한 처리 과정으로 건물 정보를 추출할 수 있다는 장점을 갖는다. 단일 고해상도 위성영상만을 이용한 건물 정보 추출 방법 중에서도 Volumetric Shadow Analysis(VSA)는 그림자나 건물 밑 바닥이 일부분 가려져도 해당 건물의 높이와 바닥 위치 정보를 추출할 수 있다. 최근에는 반자동 VSA가 제안되었으나 이 방법은 주변 객체 형태와 그림자 영역 추출 정확도, 영상 노이즈 등에 큰 영향을 받는다. 반자동 VSA를 개선하기 위해서 본 논문은 단일 고해상도 전정색 영상과 다중분광 영상을 이용한 3차원 건물 정보 추출 방법을 제안한다. 제안된 방법은 각 밴드 영상에 반자동 VSA를 각각 적용하고 이를 통해서 계산된 파라미터로 비용함수를 구성한다. 비용함수로 계산된 값이 최대인 건물 높이를 실제 건물 높이로 결정한다. 제안된 방법의 성능평가를 위해서 Kompsat-2 영상이 사용되었으며 반자동 VSA와 제안된 방법으로 추출된 건물 정보를 비교 분석하였다. 그 결과는 제안된 방법이 보다 높은 성공률로 비교적 정확한 건물 정보를 추출할 수 있음을 보여준다.

Keywords

References

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