中尺度流域NDVI尺度转换研究
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黄河水利委员会项目“黄土丘陵三副区水土流失预测预报的区域模型研究”


Scaling of ETM-NDVI for Medium Watershed Area
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    摘要:

    植被是影响水土流失最重要且最敏感的因素之一。为了更好地估算和监测区域水土流失变化,首先必须在较高时空分辨率下分析植被的动态特征。利用直方图匹配原理,以SPOT/VEGETATIONNDVI影像为参照,对基于ETM影像的NDVI数据进行变换,得到逐月30m分辨率的NDVI产品,分析匹配前后图像的统计参数、直方图相似度和图像逼真度等。结果表明,该变换结果是可靠的,可为区域水土流失动态评价与监测提供植被数据支持。

    Abstract:

    Vegetation is one of the most important and most sensitive impacting factors of soil erosion. Vegetation information products that have high resolution in both time and space are needed to study dynamic changes of vegetation, for better understanding and monitoring of soil and water loss. A method is proposed to get high spatial and temporal resolution NDVI products, by matching the histogram of ETM NDVI( 30 m) to that of SPOT/ VEGET ATION NDVI product ( 1 km, one scene every month) . The estimated NDVI products( 30 m, one scene per month) are analyzed based on several indicators such as statistical characteristics of image, histogram similarity, and image fidelity. Results from the research can be applied to dynamic evaluation and monitoring o f regional soil and water loss.

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王琦,杨勤科,任宗萍.中尺度流域NDVI尺度转换研究[J].水土保持通报,2010,(3):96-99

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  • 收稿日期:2009-12-23
  • 最后修改日期:2010-01-24
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  • 在线发布日期: 2014-11-26
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