基于高分一号影像,选用归一化差异水体指数(NDWI)阈值法、LBV变换法、"全域-局部"水体自动分割法,分别提取了布若错、赛布错和雅根错的边界.分析对比3种方法,结果显示NDWI阈值法与LBV变换法从整张影像中提取湖泊边界,影像中的非湖泊范围的区域如阴影区等,会误判为湖泊的像元;"全域-局部"水体自动分割法将提取范围从全域转为局部,减少了非湖泊范围内地物信息的干扰,并对每个湖泊的NDWI阈值独立判断,实现了湖泊边界的精细提取.%In this paper, we use normalized difference water index ( NDWI) threshold method, LBV transformation method and the"global-local" segmentation to extract the boundary of Burog Co, Serbug Co and Yaggain Canco, based on the image of GF-1 re-spectively. By comparing the three methods, the results show the NDWI threshold method and the LBV transformation method extract the lakes' boundary from the whole image, the non-lake area in the image, such as the shaded area , produce the pixels which is wrongly classified to lake. Automated water delineation method based on the"global-local" iterative scheme extract lakes' boundary from global to local, reducing the non-lake range of ground information interference, judging each lake' s NDWI threshold independ-ently to achieve the fine extraction of the lakes' boundary.
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