| 光谱学与光谱分析 |
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| Using Extraction of Red Edge Position to Validate Consistency of Hyperspectral Imaging and Non-Imaging Data |
| WANG Da-cheng1, 2, ZHANG Dong-yan1, 2, ZHAO Jin-ling1, LI Cun-jun1, ZHU Da-zhou1, HUANG Wen-jiang1, LI Yu-fei3, YANG Xiao-dong1* |
1. National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, China
2. Institute of Remote Sensing & Information Technology Application, Zhejiang University, Hangzhou 310029, China
3. Spark and Information Division of China’s Rural Technology Development Center, Ministry of Science and Technology, Beijing 100054, China |
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Abstract Using Pushbroom imaging spectrometer (PIS) and FieldSpec ProFR2500 (ASD), spectral reflectances of winter wheat and maize at different stages were collected synchronously. In order to validate the reliability of imaging spectral data, the red edge position of hyperspectral data for PIS and ASD were extracted by different algorithms, respectively. The following results were obtained: (1) The original spectrum of both instruments had high inosculation in red light region (670～740 nm); (2) With the spectra collected under laboratory condition (maize leaf), the extracted red edge position was is concentrated between 700 and 720 nm for the two instruments; (3) With the spectra collected undre field condition (wheat leaf), the extracted red edge position for PIS and ASD were different, the red edge position of PIS data was in 760 nm, while it was in 720 nm for ASD data. The main reason might be that the imaging spectral data were influenced by oxygen absorbtion; (4) the red edge rangeability of PIS and ASD were different, but the trends were the same. The above results could provide some references for hyperspectral imaging data’s extensive application.
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Received: 2010-12-20
Accepted: 2011-03-14
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Corresponding Authors:
YANG Xiao-dong
E-mail: yangxd@nercita.org.cn
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