基于高分一號(hào)寬幅多光譜影像的鄱陽(yáng)湖濕地分類(lèi)研究
[Abstract]:The classification of typical wetland types plays an important role in wetland ecological environment protection and ecological environment construction. In this study, the data of wide-amplitude multispectral image of Gaofeng No. 1 were used as data source, and the typical wetland of Poyang Lake was used as the research object to classify the typical wetland types. The spectral characteristics of different wetland types were analyzed by principal component analysis, normalized vegetation index, ratio vegetation index and normalized differential water body index. The results show that the normalized vegetation index and normalized water body index can be used to distinguish common wetland types such as water body, mudflat, occultation plant and hygrophyte. The wetland types are divided into vegetation and non-vegetation by normalized vegetation index, and the vegetation types are further divided into octopus plants and wet plants by normalized difference water body index, and non-vegetation is divided into water body and mudflat. The decision tree is constructed for automatic classification of typical wetland types. Through precision evaluation and analysis, the overall accuracy of typical wetland classification can reach 82.28% Kappa coefficient 0.7346. It is superior to the conventional supervised classification and unsupervised classification.
【作者單位】: 黑龍江第二測(cè)繪工程院;江西省環(huán)境保護(hù)科學(xué)研究院;
【分類(lèi)號(hào)】:P237
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