| 干旱区植被覆盖度提取模型的建立 |
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| 引用本文： | 牛宝茹,刘俊蓉,王政伟.干旱区植被覆盖度提取模型的建立[J].地球信息科学,2005,7(1):84-86,97-131. |
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| 作者姓名： | 牛宝茹 刘俊蓉 王政伟 |
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| 作者单位： | 中煤航测遥感局遥感应用研究院,西安,710054;中煤航测遥感局遥感应用研究院,西安,710054;中煤航测遥感局遥感应用研究院,西安,710054 |
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| 基金项目： | 国家重点基础研究发展计划(973计划);世界银行贷款项目 |
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| 摘 要： | 本文通过分析遥感提取植被覆盖度的经验模型法、植被指数法和混合像元分解法,归纳了它们各自的优势、精度和存在的问题,指出了影响应用较广泛的植被指数转换法精度是全植被覆盖像元的选取。在此基础上提出了植被指数转换法的改进模型一利用高分辨率卫星图像的最大NDVI值作为均一像元的NDVI值替换中等分辨率卫星图像的NDVI值,建立植被覆盖度提取模型,从而通过中等分辨率卫星图像获取大范围植被覆盖度的方法。经实践检验,该方法简单、实用,适合于利用中等分辨率卫星图像进行大范围宏观监测。
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| 关 键 词： | 植被覆盖度 遥感 信息提取 模型 |
| 收稿时间： | 2004-05-31; |
Remote Sensing Information Extraction Based Vegetation Fraction in Semiarid Area |
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| NIU Baoru,LIU Junrong,WANG Zhengwei.Remote Sensing Information Extraction Based Vegetation Fraction in Semiarid Area[J].Geo-information Science,2005,7(1):84-86,97-131. |
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| Authors: | NIU Baoru LIU Junrong WANG Zhengwei |
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| Institution: | Remote Sensing Application Institute of A RSC, Xi'an 710054, China |
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| Abstract: | The paper analyzes three plans on extraction of vegetation cover rate using remote sensing, i.e., experience model plan,vegetation index plan and mix-pix analytical plan and identifies their force, precision and existing problems in actual application. It points out what affects the wide application of precision of vegetation index transform plan abroad is the choose of the maximum NDVI - complete vegetation cover.Based upon this it introduces an improved model of vegetation index transform plan using the maximum NDVI value of the high resolution satellite image as the homogenous pixel's NDVI value to replace the NDVI value of the middle resolution satellite image, set up vegetation cover extraction model so as to develop a method for obtaining large scale vegetation cover with the aid of middle resolution satellite image. Practice proves this method is simple and practical, suitable for large scale macroscopic monitoring by applying middle resolution satellite image. |
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| Keywords: | vegetation coverage remote sensing information extraction model |
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