Analysis of Image Integration Methods for Applying of Multiresolution Satellite Images

다중 위성영상 활용을 위한 영상 통합 기법 분석

  • 이재기 (충북대학교 공과대학 토목공학과) ;
  • 한동석 (충북대학교 공과대학 토목공학과)
  • Published : 2004.12.01

Abstract

Data integration techniques are becoming increasing1y important for conquering a limitation with a single data. Image fusion which improves the spatial and spectral resolution from a set of images with difffrent spatial and spectral resolutions, and image registration which matches two images so that corresponding coordinate points in the two images correspond to the same physical region of the scene being imaged have been researched. In this paper, we compared with six image fusion methods(Brovey, IHS, PCA, HPF, CN, and MWD) with panchromatic and multispectral images of IKONOS and developed the registration method for applying to SPOT-5 satellite image and RADARSAT SAR satellite image. As the result of tests on image fusion and image registration, we could find that MWD and HPF methods showed the good result in term of visual comparison analysis and statistical analysis. And we could extract patches which depict detailed topographic information from SPOT-5 and RADARSAT and obtain encouraging results in image registration.

많은 응용분야에서 단일 자료가 가진 한계를 극복하기 위해 다중 자료를 이용하여 통합 활용하는 기법이 요구되고 있다. 특히, 서로 다른 공간해상도와 분광해상도를 가진 영상들을 이용하여 영상의 공간해상도를 향상시키는 영상융합과 두 자료간의 상호 관계를 설정하는 영상등록에 대한 많은 연구가 진행되고 있다. 본 연구에서는 IKONOS 전정색 영상과 다중분광 위성영상에 대해 Brovey, IHS, PCA, HPF, CN, MWD 융합기법을 적용하여 원 영상의 분광정보를 가장 적게 왜곡하는 융합기법 에 대해 고찰하였다. 또한, SPOT-5 위성영상과 RADARSAT SAR 위성영상 간에 패치를 이용한 영상정합 기법을 적용하여 해석하였다. 본 연구를 통해 영상 융합에서 시각적 분석 및 통계적 분석 결과 HPF, MWD 융합기법이 가장 좋은 성과를 나타냈었으며, SPOT-5 위성영상과 RADARSAT SAR 위성영상으로부터 지형정보를 세밀하게 표현할 수 있는 패치를 추출함으로써 효과적인 영상등록이 가능하였다.

Keywords

References

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