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랜세트 - 5호 TM 데이타를 이용한 구분후 (區分后) 비교 및 영상대차의 (映像對差) 습지대 변화 탐지 (探知) 기법에 관한 비교연구
정성학(Song Hak Choung),Joseph J . Ulliman(Joseph J . Ulliman) 한국산림과학회 1992 한국산림과학회지 Vol.81 No.4
The extensive Snake River floodplain in Northwest United States has experienced major changes in water channels and vegetation types due to floodings. To detect the change of wetland cover-types for the period of 1985 and 1988, post-classification comparison and image differencing change detection techniques were evaluated using Landsat-5 TM digital data. Differenced infrared-band images indicated better accuracy indices than any visible-band images. A thresholding technique was applied to identify the change ;ind no change categories from the transformed images produced by image differencing, The problems in using different accuracy indices, including the Kappa coefficient of agreement, overall accuracy, producer`s accuracy, user`s accuracy, and average accuracy(based on both the producer`s and user`s accuracy approaches) in determining an optimal threshold level, were examined.