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- W2907517512 abstract "Data sets of 11 cloud/surface classes are collected from daytime geostationary satellite imagery data over middle latitude and low latitude regions in summer.656 samples are randomly selected,and then 116 spectral and textural features derived from these samples are statistically investigated,curves of all features are drawn and analyzed.After feature selection,sensitivity tests of two classifiers-stepwise cluster and fuzzy cluster are explored by using of more significant feature arrays.For spectral features,results of feature curves analysis indicate that spectral characteristics are more significant than those of textural characteristics,the spectral features of IR or WV except Std show more distinguishingly than those of VIS,especially for low- or mid-level and cirrus;both results of sensitivity tests from two classifiers suggest that spectral features provide the major information of cloud classification,which are main indexes of cloud pattern discrimination.Results of textural feature curves indicate first order probability vectors(FOPV) demonstrate more obviously than those of gray level difference vectors(GLDV),especially CON of four channels and HOM of WV;results of tests show that textural features play an important role in cloud type identification,both classifiers give higher accuracies after adding textural features,combing FODV and spectral features significantly improve classification results achieved using only spectral features,but the accuracy of adding GLDV based on FODV and spectral features has little distinction with those of adding FOPV based on spectral features,which indicates that textural characteristics of FODV have more encouraging ability to distinguish between cloud/surfaces than those of GLDV,consisting with results of feature curves analysis." @default.
- W2907517512 created "2019-01-11" @default.
- W2907517512 creator A5084319893 @default.
- W2907517512 date "2011-09-27" @default.
- W2907517512 modified "2023-09-25" @default.
- W2907517512 title "Staticical Analysis on Spectral and Textural Features of Clouds" @default.
- W2907517512 doi "https://doi.org/10.11873/j.issn.1004-0323.2006.1.18" @default.
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