| 基于高光谱植被指数的黑河流域作物叶绿素含量制图 |
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| 引用本文： | 廖钦洪.基于高光谱植被指数的黑河流域作物叶绿素含量制图[J].农业工程学报,2015,31(Z2):159-163. |
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| 作者姓名： | 廖钦洪 |
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| 作者单位： | 1.重庆文理学院林学与生命科学学院,永川 402160;2.重庆特色植物种苗工程技术研究中心,永川 402160 |
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| 基金项目： | National Natural Science Foundation of China( 41401419); Foundation for the Scientific Study of Chongqing University of Art and Science(R2014LX06) |
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| 摘 要： |
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| 收稿时间： | 2015/10/1 0:00:00 |
Chlorophyll content mapping of crops in Heihe River Basin based on hyperspectral vegetation indices |
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| Liao Qinhong.Chlorophyll content mapping of crops in Heihe River Basin based on hyperspectral vegetation indices[J].Transactions of the Chinese Society of Agricultural Engineering,2015,31(Z2):159-163. |
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| Authors: | Liao Qinhong |
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| Institution: | 1.College of Life Science and Forestry, Chongqing University of Art and Science, Yongchuan 402160, China;2.Special Plants Research Institution, Chongqing University of Arts and Sciences, Yongchuan 402160, China |
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| Abstract: | Recent advances in optical remote sensing led to improved methodologies to monitor crop properties.The red-edge-based vegetation index considered to be one of the most powerful tools for estimating the chlorophyll content(Chl) was usually constructed from in-situ hyperspectral reflectance.In this paper, we present the work done to compare the Chl predictive quality by various red-edge-based vegetation indices based on the CASI data.The results indicated that among the selected vegetation indices, TCARI/OSAVI-based model estimated Chl(R2=0.46, RMSE =0.60 and P<0.01) with the best accuracy.To search the optimal vegetation index for Chl estimation, the normalized difference spectral index(NDSI) and ratio spectral index(RSI) were developed by using the waveband combination algorithm.A high linear correlation(R2=0.79, RMSE=0.38 and P<0.01) was acquired by combining the 869.20 and 754.90 nm wavebands, then NDSI(869.20, 754.90) was applied to the CASI image to generate the Chl distribution map.It suggests that more fertilizer should be provided for the southwest areas due to the lower Chl. |
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| Keywords: | chlorophyll algorithms mapping red-edge-based vegetation index CASI data waveband combination algorithm |
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