Preliminary validation of Leaf Area Index Sensor in Huailai

被引：0
作者：
Cai, Erli [1 ,2 ]
Li, Xiuhong [1 ,2 ,3 ,4 ]
Liu, Qiang [1 ,2 ,3 ,4 ]
Dou, Baocheng [1 ,2 ,3 ,4 ]
Chang, Chongyan [5 ]
Niu, Hailin [1 ,2 ]
Lin, Xingwen [1 ,2 ,3 ,4 ]
Zhang, Jialin [1 ,2 ]
机构：
[1] Beijing Normal Univ, Coll Global Change & Earth Syst Sci, 19 XinJieKou Wai St, Beijing 100875, Peoples R China
[2] Joint Ctr Global Change Studies, Beijing 100875, Peoples R China
[3] Chinese Acad Sci, Inst Remote Sensing & Digital Earth, State Key Lab Remote Sensing Sci, Beijing 100101, Peoples R China
[4] Beijing Normal Univ, Beijing 100101, Peoples R China
[5] Beijing Normal Univ, Anal & Testing Ctr, Beijing 100875, Peoples R China
来源：
INTERNATIONAL CONFERENCE ON INTELLIGENT EARTH OBSERVING AND APPLICATIONS 2015 | 2015年 / 9808卷
关键词：
leaf area index; destructive sampling; digital photos; validation; CROPS;
D O I：
10.1117/12.2207616
中图分类号：
TP7 [遥感技术];
学科分类号：
081102 ; 0816 ; 081602 ; 083002 ; 1404 ;
摘要：
Leaf area index (LAI) is a key variable in many land surface models that involve energy and mass exchange between vegetation and the environment. In recent years, extracting vegetation structure parameters from digital photography becomes a widely used indirect method to estimate LAI for its simplicity and ease of use. A Leaf Area Index Sensor (LAIS) system was developed to continuously monitor the growth of crops in several sampling points in Huailai, China. The system applies 3G/WIFI communication technology to remotely collect crop photos in real-time. Then the crop photos are automatically processed and LAI is estimated based on the improved leaf area index of Lang and Xiang (LAILX) algorithm in LAIS. The objective of this study is to primarily verify the LAI estimated from LAIS (Lphoto) through comparing them with the destructive green LAI (Ldest). Ldest was measured across the growing season ntil maximum canopy development while plants are still green. The preliminary verification shows that Lphoto corresponds well with the Ldest (R2=0.975). In general, LAI could be accurately estimated with LAIS and its LAI shows high consistency compared with the destructive green LAI. The continuous LAI measurement obtained from LAIS could be used for the validation of remote sensing LAI products.
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页数：6
相关论文
共 10 条
[1]   GAI estimates of row crops from downward looking digital photos taken perpendicular to rows at 57.5° zenith angle: Theoretical considerations based on 3D architecture models and application to wheat crops [J].
Baret, F. ;
de Solan, B. ;
Lopez-Lozano, R. ;
Ma, Kai ;
Weiss, M. .
AGRICULTURAL AND FOREST METEOROLOGY, 2010, 150 (11) :1393-1401
[2]   PLANT CANOPY GAP-SIZE ANALYSIS THEORY FOR IMPROVING OPTICAL MEASUREMENTS OF LEAF-AREA INDEX [J].
CHEN, JM ;
CIHLAR, J .
APPLIED OPTICS, 1995, 34 (27) :6211-6222
[3]   Estimation of leaf area and clumping indexes of crops with hemispherical photographs [J].
Demarez, Valerie ;
Duthoit, Sylvie ;
Baret, Frederic ;
Weiss, Marie ;
Dedieu, Gerard .
AGRICULTURAL AND FOREST METEOROLOGY, 2008, 148 (04) :644-655
[4]   Review of methods for in situ leaf area index determination - Part I. Theories, sensors and hemispherical photography [J].
Jonckheere, I ;
Fleck, S ;
Nackaerts, K ;
Muys, B ;
Coppin, P ;
Weiss, M ;
Baret, F .
AGRICULTURAL AND FOREST METEOROLOGY, 2004, 121 (1-2) :19-35
[5]   ESTIMATION OF LEAF-AREA INDEX FROM TRANSMISSION OF DIRECT SUNLIGHT IN DISCONTINUOUS CANOPIES [J].
LANG, ARG ;
XIANG, YQ .
AGRICULTURAL AND FOREST METEOROLOGY, 1986, 37 (03) :229-243
[6]   Methodology comparison for canopy structure parameters extraction from digital hemispherical photography in boreal forests [J].
Leblanc, SG ;
Chen, JM ;
Fernandes, R ;
Deering, DW ;
Conley, A .
AGRICULTURAL AND FOREST METEOROLOGY, 2005, 129 (3-4) :187-207
[7]   The Design and Implementation of the Leaf Area Index Sensor [J].
Li, Xiuhong ;
Liu, Qiang ;
Yang, Rongjin ;
Zhang, Haijing ;
Zhang, Jialin ;
Cai, Erli .
SENSORS, 2015, 15 (03) :6250-6269
[8]   Estimation of leaf area index in eucalypt forest using digital photography [J].
Macfarlane, Craig ;
Hoffman, Megan ;
Eamus, Derek ;
Kerp, Naomi ;
Higginson, Simon ;
McMurtrie, Ross ;
Adams, Mark .
AGRICULTURAL AND FOREST METEOROLOGY, 2007, 143 (3-4) :176-188
[9]   Review of methods for in situ leaf area index (LAI) determination Part II. Estimation of LAI, errors and sampling [J].
Weiss, M ;
Baret, F ;
Smith, GJ ;
Jonckheere, I ;
Coppin, P .
AGRICULTURAL AND FOREST METEOROLOGY, 2004, 121 (1-2) :37-53
[10]  
Xu GH, 2012, ADVANCED REMOTE SENSING: TERRESTRIAL INFORMATION EXTRACTION AND APPLICATIONS, P347, DOI 10.1016/B978-0-12-385954-9.00011-3
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