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Ground-level hyperspectral imagery for detecting weeds in wheat fields
Year:
2013
Source of publication :
precision agriculture (source )
Authors :
Bonfil, David J.
;
.
Volume :
14
Co-Authors:
Herrmann, I., The Remote Sensing Laboratory, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, 84990 Sede Boker Campus, Israel
Shapira, U., The Remote Sensing Laboratory, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, 84990 Sede Boker Campus, Israel
Kinast, S., Department of Solar Energy and Environmental Physics, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, 84990 Sede Boker Campus, Israel
Karnieli, A., The Remote Sensing Laboratory, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, 84990 Sede Boker Campus, Israel
Bonfil, D.J., Field Crops and Natural Resources Department, Agricultural Research Organization, Gilat Research Center, 85280 Negev, Israel
Facilitators :
From page:
637
To page:
659
(
Total pages:
23
)
Abstract:
Site-specific weed management can allow more efficient weed control from both an environmental and an economic perspective. Spectral differences between plant species may lead to the ability to separate wheat from weeds. The study used ground-level image spectroscopy data, with high spectral and spatial resolutions, for detecting annual grasses and broadleaf weeds in wheat fields. The image pixels were used to cross-validate partial least squares discriminant analysis classification models. The best model was chosen by comparing the cross-validation confusion matrices in terms of their variances and Cohen's Kappa values. This best model used four classes: broadleaf, grass weeds, soil and wheat and resulted in Kappa of 0.79 and total accuracy of 85 %. Each of the classes contains both sunlit and shaded data. The variable importance in projection method was applied in order to locate the most important spectral regions for each of the classes. It was found that the red-edge is the most important region for the vegetation classes. Ground truth pixels were randomly selected and their confusion matrix resulted in a Kappa of 0.63 and total accuracy of 72 %. The results obtained were reasonable although the model used wheat and weeds from different growth stages, acquisition dates and fields. It was concluded that high spectral and spatial resolutions can provide separation between wheat and weeds based on their spectral data. The results show feasibility for up-scaling the spectral methods to air or spaceborne sensors as well as developing ground-level application. © 2013 Springer Science+Business Media New York.
Note:
Related Files :
discriminant analysis
field
image analysis
Poaceae
satellite imagery
Triticum aestivum
Weed
wheat
Show More
Related Content
More details
DOI :
10.1007/s11119-013-9321-x
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
24547
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:08
Scientific Publication
Ground-level hyperspectral imagery for detecting weeds in wheat fields
14
Herrmann, I., The Remote Sensing Laboratory, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, 84990 Sede Boker Campus, Israel
Shapira, U., The Remote Sensing Laboratory, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, 84990 Sede Boker Campus, Israel
Kinast, S., Department of Solar Energy and Environmental Physics, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, 84990 Sede Boker Campus, Israel
Karnieli, A., The Remote Sensing Laboratory, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, 84990 Sede Boker Campus, Israel
Bonfil, D.J., Field Crops and Natural Resources Department, Agricultural Research Organization, Gilat Research Center, 85280 Negev, Israel
Ground-level hyperspectral imagery for detecting weeds in wheat fields
Site-specific weed management can allow more efficient weed control from both an environmental and an economic perspective. Spectral differences between plant species may lead to the ability to separate wheat from weeds. The study used ground-level image spectroscopy data, with high spectral and spatial resolutions, for detecting annual grasses and broadleaf weeds in wheat fields. The image pixels were used to cross-validate partial least squares discriminant analysis classification models. The best model was chosen by comparing the cross-validation confusion matrices in terms of their variances and Cohen's Kappa values. This best model used four classes: broadleaf, grass weeds, soil and wheat and resulted in Kappa of 0.79 and total accuracy of 85 %. Each of the classes contains both sunlit and shaded data. The variable importance in projection method was applied in order to locate the most important spectral regions for each of the classes. It was found that the red-edge is the most important region for the vegetation classes. Ground truth pixels were randomly selected and their confusion matrix resulted in a Kappa of 0.63 and total accuracy of 72 %. The results obtained were reasonable although the model used wheat and weeds from different growth stages, acquisition dates and fields. It was concluded that high spectral and spatial resolutions can provide separation between wheat and weeds based on their spectral data. The results show feasibility for up-scaling the spectral methods to air or spaceborne sensors as well as developing ground-level application. © 2013 Springer Science+Business Media New York.
Scientific Publication
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