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CLC number: TP751

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Received: 2006-04-01

Revision Accepted: 2006-08-05

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Journal of Zhejiang University SCIENCE A 2006 Vol.7 No.12 P.2002~2006

10.1631/jzus.2006.A2002


A modified chlorophyll absorption continuum index for chlorophyll estimation


Author(s):  YANG Xiao-hua, HUANG Jing-feng, WANG Fu-min, WANG Xiu-zhen, YI Qiu-xiang, WANG Yuan

Affiliation(s):  Institute of Agricultural Remote Sensing & Information Application, Zhejiang University, Hangzhou 310029, China; more

Corresponding email(s):   hjf@zju.edu.cn

Key Words:  Continuum, Chlorophyll, Sensitivity, Prediction power


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 A, 2006, 7(12): 2002~2006.

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author="YANG Xiao-hua, HUANG Jing-feng, WANG Fu-min, WANG Xiu-zhen, YI Qiu-xiang, WANG Yuan",
journal="Journal of Zhejiang University Science A",
volume="7",
number="12",
pages="2002~2006",
year="2006",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2006.A2002"
}

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%T A modified chlorophyll absorption continuum index for chlorophyll estimation
%A YANG Xiao-hua
%A HUANG Jing-feng
%A WANG Fu-min
%A WANG Xiu-zhen
%A YI Qiu-xiang
%A WANG Yuan
%J Journal of Zhejiang University SCIENCE A
%V 7
%N 12
%P 2002~2006
%@ 1673-565X
%D 2006
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2006.A2002

TY - JOUR
T1 - A modified chlorophyll absorption continuum index for chlorophyll estimation
A1 - YANG Xiao-hua
A1 - HUANG Jing-feng
A1 - WANG Fu-min
A1 - WANG Xiu-zhen
A1 - YI Qiu-xiang
A1 - WANG Yuan
J0 - Journal of Zhejiang University Science A
VL - 7
IS - 12
SP - 2002
EP - 2006
%@ 1673-565X
Y1 - 2006
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2006.A2002


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.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

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[3] Cho, M.A., Skidmore, A.K., 2006. A new technique for extracting the red edge position from hyperspectral data: The linear extrapolation method. Remote Sensing of Environment, 101(2):181-193.

[4] Clark, R.N., Roush, T.L., 1984. Reflectance saectroscopy: quantitative analysis techniques for remote sensing applications. Journal of Geophysical Research, 89:6329-6340.

[5] Filella, I., Peñuelas, J., 1994. The red edge position and shape as indicators of plant chlorophyll content, biomass and hydric status. International Journal of Remote Sensing, 15(7):1459-1470.

[6] Gitelson, A.A., Merzlyak, M.N., Lichtenthaler, H.K., 1996. Detection of red edge position and chlorophyll content by reflectance measurements near 700 nm. Journal of Plant Physiology, 148:501-508.

[7] Horler, D.N.H., Dockray, M., Barber, J., 1983a. The red edge of plant leaf reflectance. International Journal of Remote Sensing, 4(2):273-288.

[8] Horler, D.N.H., Dockray, M., Barber, J., Barringer, A.R., 1983b. Red edge measurements for remotely sensing plant chlorophyll content. Advances in Space Research, 3(2):273-277.

[9] Schmidt, K.S., Skidmore, A.K., 2003. Spectral discrimination of vegetation types in a coastal wetland. Remote Sensing of Environment, 85:92-108.

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