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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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基于tm影像的水体信息提取方法研究
DOI: 10.3969/j.jssn.1000-2006.2012.04.006, PP. 29-35
Keywords: 高邮湖,tm影像,指数模型,水体信息提取,谱间关系法,混合水体指数
Abstract:
以高邮湖为研究区,tm(thematicmapper)影像为数据源,结合常规调查数据,分别运用单波段阈值法、谱间关系法、比值法、归一化差异水体指数(ndwi)法、改进的归一化差值水体指数(mndwi)法和混合水体指数(ciwi)法进行水体信息提取研究。并通过实验比较6种方法的优缺点,确定出最佳水体提取方法。结果表明,谱间关系法易于消除由于建筑物阴影所造成的水体误提;ciwi易于消除建筑用地所造成的水体误提;基于谱间关系法和ciwi模型,可取得较高的水体提取精度,有效地减少水体误提现象,提高水体识别的精度。研究表明,基于谱间关系法和ciwi模型相结合所提取的水体信息精度可达到95.2%。
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