Results 261 to 270 of about 1,018,273 (298)

The red edge parameters as indicators of rice nitrogen levels

SPIE Proceedings, 2003
The canopy spectra of rice under different nitrogen levels were studied. Some red edge parameters in the first derivative reflectance curve (wavelength, amplitude and area of the red edge peak) were used to evaluate rice leaf chlorophyll, LAI. Red edge positions move to longer wave bands till booting stage and move to short bands after booting stage. A
Jingfeng Huang, Xiuzhen Wang, Renchao Wang   +2 more
openaire   +1 more source

Exploring the relationship between red edge parameters and crop variables for precision agriculture

IEEE International IEEE International IEEE International Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings. 2004, 2004
This paper presents the study of the relationships between crop variables and the red edge parameters extracted using the inverted Gaussian model. Variability of the red edge parameters induced by the variations of leaf and canopy model parameters was analyzed using PROSPECT and SAILH simulated spectra.
Jiangui Liu, John R. Miller 0001, Driss Haboudane, Elizabeth Pattey   +3 more
openaire   +1 more source

Estimating winter wheat plant water content using red edge parameters

International Journal of Remote Sensing, 2004
Remote sensing of plant water content is difficult because the absorption band sensitive to foliar liquid water is also sensitive to the atmospheric vapour. A method using non-water-absorption spectral parameters to evaluate plant water content (PWC) would be valuable.
Liangyun Liu, Jihua Wang, Wenjiang Huang, Chunjiang Zhao, Bing Zhang, Qingxi Tong   +5 more
openaire   +1 more source

[Effects of water stress on red-edge parameters and yield in wheat cropping].

Guang pu xue yu guang pu fen xi = Guang pu, 2015
The objective of the present paper is to study the influence of water stress on wheat spectrum red edge parameters by using field wheat spectrum data obtained from water stress experiment. Firstly, the authors analyzed the influence of water stress on wheat spectrum reflectance. Then the authors got the wheat red edge position and red edge peak through
Ke-Xun, He, Shu-He, Zaho, Jian-Bin, Lai, Yun-Xiao, Luo, Zhi-Hao, Qin   +4 more
openaire   +1 more source

[Comparison of red edge parameters of winter wheat canopy under late frost stress].

Guang pu xue yu guang pu fen xi = Guang pu, 2015
In the present study, late frost experiments were implemented under a range of subfreezing temperatures (-1 - -9 degrees C) by using a field movable climate chamber (FMCC) and a cold climate chamber, respectively. Based on the spectra of winter wheat canopy measured at noon on the first day after the frost experiments, red edge parameters REP, Dr, SDr,
Yong-feng, Wu, Xin, Hu, Guo-hua, Lü, De-chao, Ren, Wei-guo, Jiang, Ji-qing, Song   +5 more
openaire   +1 more source

[Validation of HJ-1 HSI red edge parameters based on spectral reflectance of Hyperion].

Guang pu xue yu guang pu fen xi = Guang pu, 2015
To validate the HJ-1A HSI red edge indices, spectral reflectance data from EO-1 Hyperion of close date were used to simulate the band reflectance of HJ-1A HSI. Four red edge indices (red vale position, red edge position, red edge slop and red edge swing) were extracted from both simulated and actual HJ-1A HSI band reflectance.
Ji-hua, Meng, Bing-fang, Wu, Li-ming, Niu, Xin, Du, Xue-yang, Chen, Fei-fei, Zhang   +5 more
openaire   +1 more source

Inversion of Wheat Leaf Area Index by Multivariate Red-Edge Spectral Vegetation Index

Sustainability, 2022
Xiaoxuan Wang
exaly  

Rice Mapping and Growth Monitoring Based on Time Series GF-6 Images and Red-Edge Bands

Remote Sensing, 2021
Xueqin Jiang, Shenghui Fang, Xia Huang
exaly  

Crop Classification Based on Red Edge Features Analysis of GF-6 WFV Data

Sensors, 2021
exaly  

A new technique for extracting the red edge position from hyperspectral data: The linear extrapolation method

Remote Sensing of Environment, 2006
Moses Azong Cho
exaly