Classification of Maize in Complex Smallholder Farming Systems Using UAV Imagery
(2018) In Drones 2(3). p.1-8- Abstract
- Yield estimates and yield gap analysis are important for identifying poor agricultural productivity. Remote sensing holds great promise for measuring yield and thus determining yield gaps. Farming systems in sub-Saharan Africa (SSA) are commonly characterized by small field size, intercropping, different crop species with similar phenologies, and sometimes high cloud frequency during the growing season, all of which pose real challenges to remote sensing. Here, an unmanned aerial vehicle (UAV) system based on a quadcopter equipped with two consumer-grade cameras was used for the delineation and classification of maize plants on smallholder farms in Ghana. Object-oriented image classification methods were applied to the imagery, combined... (More)
- Yield estimates and yield gap analysis are important for identifying poor agricultural productivity. Remote sensing holds great promise for measuring yield and thus determining yield gaps. Farming systems in sub-Saharan Africa (SSA) are commonly characterized by small field size, intercropping, different crop species with similar phenologies, and sometimes high cloud frequency during the growing season, all of which pose real challenges to remote sensing. Here, an unmanned aerial vehicle (UAV) system based on a quadcopter equipped with two consumer-grade cameras was used for the delineation and classification of maize plants on smallholder farms in Ghana. Object-oriented image classification methods were applied to the imagery, combined with measures of image texture and intensity, hue, and saturation (IHS), in order to achieve delineation. It was found that the inclusion of a near-infrared (NIR) channel and red–green–blue (RGB) spectra, in combination with texture or IHS, increased the classification accuracy for both single and mosaic images to above 94%. Thus, the system proved suitable for delineating and classifying maize using RGB and NIR imagery and calculating the vegetation fraction, an important parameter in producing yield estimates for heterogeneous smallholder farming systems. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/bfac5367-65d4-4bd3-a012-fac3986c4ce7
- author
- Hall, Ola LU ; Dahlin, Sigrun ; Marstorp, Håkan ; Archila, Maria LU ; Öborn, Ingrid and Jirström, Magnus LU
- organization
- publishing date
- 2018-06-22
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- UAV, remote sensing, maize, OBIA, Ghana
- in
- Drones
- volume
- 2
- issue
- 3
- article number
- 22
- pages
- 8 pages
- publisher
- MDPI AG
- external identifiers
-
- scopus:85061568241
- ISSN
- 2504-446X
- DOI
- 10.3390/drones2030022
- language
- English
- LU publication?
- yes
- id
- bfac5367-65d4-4bd3-a012-fac3986c4ce7
- date added to LUP
- 2018-06-27 07:45:57
- date last changed
- 2022-04-17 21:15:38
@article{bfac5367-65d4-4bd3-a012-fac3986c4ce7,
abstract = {{Yield estimates and yield gap analysis are important for identifying poor agricultural productivity. Remote sensing holds great promise for measuring yield and thus determining yield gaps. Farming systems in sub-Saharan Africa (SSA) are commonly characterized by small field size, intercropping, different crop species with similar phenologies, and sometimes high cloud frequency during the growing season, all of which pose real challenges to remote sensing. Here, an unmanned aerial vehicle (UAV) system based on a quadcopter equipped with two consumer-grade cameras was used for the delineation and classification of maize plants on smallholder farms in Ghana. Object-oriented image classification methods were applied to the imagery, combined with measures of image texture and intensity, hue, and saturation (IHS), in order to achieve delineation. It was found that the inclusion of a near-infrared (NIR) channel and red–green–blue (RGB) spectra, in combination with texture or IHS, increased the classification accuracy for both single and mosaic images to above 94%. Thus, the system proved suitable for delineating and classifying maize using RGB and NIR imagery and calculating the vegetation fraction, an important parameter in producing yield estimates for heterogeneous smallholder farming systems.}},
author = {{Hall, Ola and Dahlin, Sigrun and Marstorp, Håkan and Archila, Maria and Öborn, Ingrid and Jirström, Magnus}},
issn = {{2504-446X}},
keywords = {{UAV; remote sensing; maize; OBIA; Ghana}},
language = {{eng}},
month = {{06}},
number = {{3}},
pages = {{1--8}},
publisher = {{MDPI AG}},
series = {{Drones}},
title = {{Classification of Maize in Complex Smallholder Farming Systems Using UAV Imagery}},
url = {{http://dx.doi.org/10.3390/drones2030022}},
doi = {{10.3390/drones2030022}},
volume = {{2}},
year = {{2018}},
}