Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography (한국측량학회지)

Korean Society of Surveying, Geodesy, Photogrammetry and Cartography (한국측량학회)
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A Worldview-2 satellite imagery pansharpening algorithm for minimizing the effects of local displacement

지역적 변위에 따른 영향을 최소화하기 위한 Worldview-2 위성영상의 융합 기법

  • 최재완 (충북대학교 공과대학 토목공학부)
  • Received : 2011.10.10
  • Accepted : 2011.11.09
  • Published : 2011.12.31
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Abstract

In remote sensing, spatial/spectral distortions are recognized as two of the main problems in the pansharpening algorithm. Most pansharpening methodologies show a tendency to distort spatial information from objects such as buildings and vehicles because there are local spatial dissimilarities among multispectral bands in Worldview-2 satellite imagery. In this paper, we propose a new pansharpening algorithm in order to minimize the effects of the local displacement of spatial information in the pansharpening process. In experiments using Worldview-2 images, our method provided better spectral and spatial quality than pre-existing pansharpening methods.

원격탐사에서 분광 및 공간정보가 왜곡되는 현상들은 영상융합 알고리즘의 가장 큰 문제점으로 알려져 있다. 특히, Worldview-2 위성영상은 멀티스펙트럴 밴드 간 공간정보의 지역적인 비유사성이 존재하기 때문에, 기존의 융합 기법에 의한 융합영상들은 건물이나 차량 등의 개체 등의 공간정보가 왜곡되는 문제를 지닌다. 본 연구에서는 Worldview-2 위성영상의 융합과정에서 발생하는 공간정보의 지역적 변위를 최소화하기 위한 융합 기법을 제안하였다. Worldview-2 위성영상에 제안된 기법을 적용한 결과, 기존의 영상 융합기법에 비하여 분광 정보 및 공간정보의 품질이 향상된 융합영상을 생성할 수 있음을 확인하였다.

Keywords

References

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