| A modified chlorophyll absorption continuum index for chlorophyll estimation |
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| 作者姓名： | YANG Xiao-hua HUANG Jing-feng WANG Fu-min WANG Xiu-zhen YI Qiu-xiang WANG Yuan |
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| 作者单位： | [1]Institute of Agricultural Remote Sensing ＆ Information Application, Zhejiang University, Hangzhou 310029. China [2]Zhejiang Meteorological Institute. Hangzhou 310004, China |
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| 基金项目： | Project （Nos. 40571115 and 40271078） supported by the National Natural Science Foundation of China |
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| 摘 要： | There is increasing interest in using hyperspectral data for quantitative characterization of vegetation in spatial and temporal scopes. Many spectral indices are being developed to improve vegetation sensitivity by minimizing the background influence. The chlorophyll absorption continuum index （CACI） is such a measure to calculate the spectral continuum on which the analyses are based on the area of the troughs spanned by the spectral continuum, However, different values of CACI were obtained in this method because different positions of continuums were determined by different users. Furthermore, the sensitivity of CACI to agronomic parameters such as green leaf chlorophyll density （GLCD） has been reduced because the fixed positions of continuums are determined when the red edge shifted with the change in GLCD. A modified chlorophyll absorption continuum index （MCACI） is presented in this article. The red edge inflection point （REIP） replaces the maximum reflectance point （MRP） in near-infrared （NIR） shoulder on the CACI continuum. This MCACI has been proved to increase the sensitivity and predictive power of GLCD.
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| 关 键 词： | 连续介质 叶绿素 敏感性 预测功率 |
| 收稿时间： | 2006-04-01 |
| 修稿时间： | 2006-08-05 |
A modified chlorophyll absorption continuum index for chlorophyll estimation |
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| YANG Xiao-hua HUANG Jing-feng WANG Fu-min WANG Xiu-zhen YI Qiu-xiang WANG Yuan.A modified chlorophyll absorption continuum index for chlorophyll estimation[J].Journal of Zhejiang University Science,2006,7(12):2002-2006. |
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| Authors: | Xiao-hua Yang Jing-feng Huang Fu-min Wang Xiu-zhen Wang Qiu-xiang Yi Yuan Wang |
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| Institution: | (1) Institute of Agricultural Remote Sensing & Information Application, Zhejiang University, Hangzhou, 310029, China;(2) Zhejiang Meteorological Institute, Hangzhou, 310004, China |
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| Abstract: | There is increasing interest in using hyperspectral data for quantitative characterization of vegetation in spatial and temporal
scopes. Many spectral indices are being developed to improve vegetation sensitivity by minimizing the background influence.
The chlorophyll absorption continuum index (CACI) is such a measure to calculate the spectral continuum on which the analyses
are based on the area of the troughs spanned by the spectral continuum. However, different values of CACI were obtained in
this method because different positions of continuums were determined by different users. Furthermore, the sensitivity of
CACI to agronomic parameters such as green leaf chlorophyll density (GLCD) has been reduced because the fixed positions of
continuums are determined when the red edge shifted with the change in GLCD. A modified chlorophyll absorption continuum index
(MCACI) is presented in this article. The red edge inflection point (REIP) replaces the maximum reflectance point (MRP) in
near-infrared (NIR) shoulder on the CACI continuum. This MCACI has been proved to increase the sensitivity and predictive
power of GLCD.
Project (Nos. 40571115 and 40271078) supported by the National Natural Science Foundation of China |
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| Keywords: | Continuum Chlorophyll Sensitivity Prediction power |
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