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《Science of Surveying and Mapping》 2013-04
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Establishment of synthetical water index

MENG Wei-can,ZHU Shu-long,CAO Wen,SU Xiao-jun,CAO Bin-cai(Institute of Surveying and Mapping,Information Engineering University,Zhengzhou 450052,China)  
Traditional water index such as MNDWI and NDWI was analyzed and a new way of establishing water index was proposed in the paper.LBV transformation and HSV transformation were carried out on multispectral image.Spectral characteristic curves were drawn and spectrum characteristic of water body was concluded.Water Index was established by using both multispectral information and new spectral information.In this paper,SWI(Synthetical Water Index) was established by using Sat waveband produced by HSV transformation and V waveband produced by LBV transformation.An automatic extraction experiment of water body information was implemented then.The result showed that SWI could reduce the number of false water pixels(terrain shadow and vegetation).
【CateGory Index】: P237
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