지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2015.1
- 수록면
- 293 - 302 (10page)
이용수
초록· 키워드
오류제보하기
Water body extraction is significant for flood disaster monitoring using satellite imagery. Conventional methods have focused on finding an index, which highlights water body and suppresses non-water body such as vegetation or soil area. The Normalized Difference Water Index (NDWI) is typically used to extract water body from satellite images. The drawback of NDWI, however, is that some man-made objects in built-up areas have NDWI values similar to water body. The objective of this paper is to propose a new method that could extract correctly water body with built-up areas in before and after images of flood. We first create a two-element feature vector consisting of NDWI and a Near InfRared band (NIR) and then select a training site on water body area. After computing the mean vector and the covariance matrix of the training site, we classify each pixel into water body based on Mahalanobis distance. We also register before and after images of flood using outlier removal and triangulation-based local transformation. We finally create a change map by combining the before-flooding water body and after-flooding water body. The experimental results show that the overall accuracy and Kappa coefficient of the proposed method were 97.25% and 94.14%, respectively, while those of the NDWI method were 89.5% and 69.6%, respectively.
목차
등록된 정보가 없습니다.
참고문헌 (10)
참고문헌 신청
Ji, L. / 2009 / Analysis of dynamic thresholds for the normalized difference water index / Photogrammetric Engineering & Remote Sensing 75 (11) : 1307 ~ 1317
Kuenzer, C / 2013 / Flood mapping and flood dynamics of the mekong delta:ENVISAT-ASAR-WSM based time series analyses / Remote Sensing 5 : 687 ~ 715
Martinis, S. / 2015 / A fully automated TerraSAR-X based flood service / ISPRS Journal of Photogrammetry and Remote Sensing 104 : 203 ~ 212
Matgen, P. / 2011 / Towards an automated SAR-based flood monitoring system: Lessons learned from two case studies / Physics and Chemistry of the Earth 36 : 241 ~ 252
Mcfeeters, S.K. / 1996 / The use of normalized difference water index (NDWI) in the delineation of open water features / International Journal of Remote Sensing 17 (7) : 1425
Kuenzer, C / 2013 / Flood mapping and flood dynamics of the mekong delta:ENVISAT-ASAR-WSM based time series analyses / Remote Sensing 5 : 687 ~ 715
Martinis, S. / 2015 / A fully automated TerraSAR-X based flood service / ISPRS Journal of Photogrammetry and Remote Sensing 104 : 203 ~ 212
Matgen, P. / 2011 / Towards an automated SAR-based flood monitoring system: Lessons learned from two case studies / Physics and Chemistry of the Earth 36 : 241 ~ 252
Mcfeeters, S.K. / 1996 / The use of normalized difference water index (NDWI) in the delineation of open water features / International Journal of Remote Sensing 17 (7) : 1425
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