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Configuration and specifications of an Unmanned Aerial Vehicle (UAV) for early site specific weed management

Torres-Sánchez, Jorge ; López-Granados, Francisca ; De Castro, Ana Isabel ; Peña-Barragán, José Manuel Abbott, Derek

PloS one, 2013-03, Vol.8 (3), p.e58210-e58210 [Periódico revisado por pares]

United States: Public Library of Science

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Título:
Configuration and specifications of an Unmanned Aerial Vehicle (UAV) for early site specific weed management
Autor: Torres-Sánchez, Jorge ; López-Granados, Francisca ; De Castro, Ana Isabel ; Peña-Barragán, José Manuel
Abbott, Derek
Assuntos: Agriculture ; Agronomy ; Aircraft ; Altitude ; Altitudes ; Biology ; Cameras ; Computer applications ; Computer Science ; Configurations ; Councils ; Crops ; Earth Sciences ; Engineering ; Flight ; Flight altitude ; Geospatial data ; Image acquisition ; Mission planning ; Normalized difference vegetative index ; Photography ; Plants (botany) ; Remote sensing systems ; Remotely piloted vehicles ; Robotics ; Satellites ; Seedlings ; Sensors ; Spatial discrimination ; Spatial resolution ; Specifications ; Spectra ; Sustainable agriculture ; Unmanned aerial vehicles ; Vegetation ; Vegetation index ; Vehicles ; Weed control ; Weed Control - instrumentation ; Weed Control - methods ; Weeds ; Workflow
É parte de: PloS one, 2013-03, Vol.8 (3), p.e58210-e58210
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Competing Interests: The authors have declared that no competing interests exist.
Interpretation of data: JTS JMPB FLG. Conceived and designed the experiments: JMPB FLG. Performed the experiments: JTS FLG AIDC JMPB. Analyzed the data: JTS AIDC JMPB. Contributed reagents/materials/analysis tools: FLG JMPB. Wrote the paper: JTS FLG JMPB.
Descrição: A new aerial platform has risen recently for image acquisition, the Unmanned Aerial Vehicle (UAV). This article describes the technical specifications and configuration of a UAV used to capture remote images for early season site- specific weed management (ESSWM). Image spatial and spectral properties required for weed seedling discrimination were also evaluated. Two different sensors, a still visible camera and a six-band multispectral camera, and three flight altitudes (30, 60 and 100 m) were tested over a naturally infested sunflower field. The main phases of the UAV workflow were the following: 1) mission planning, 2) UAV flight and image acquisition, and 3) image pre-processing. Three different aspects were needed to plan the route: flight area, camera specifications and UAV tasks. The pre-processing phase included the correct alignment of the six bands of the multispectral imagery and the orthorectification and mosaicking of the individual images captured in each flight. The image pixel size, area covered by each image and flight timing were very sensitive to flight altitude. At a lower altitude, the UAV captured images of finer spatial resolution, although the number of images needed to cover the whole field may be a limiting factor due to the energy required for a greater flight length and computational requirements for the further mosaicking process. Spectral differences between weeds, crop and bare soil were significant in the vegetation indices studied (Excess Green Index, Normalised Green-Red Difference Index and Normalised Difference Vegetation Index), mainly at a 30 m altitude. However, greater spectral separability was obtained between vegetation and bare soil with the index NDVI. These results suggest that an agreement among spectral and spatial resolutions is needed to optimise the flight mission according to every agronomical objective as affected by the size of the smaller object to be discriminated (weed plants or weed patches).
Editor: United States: Public Library of Science
Idioma: Inglês

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Configuration and specifications of an Unmanned Aerial Vehicle (UAV) for early site specific weed management

Torres-Sánchez, Jorge ; López-Granados, Francisca ; De Castro, Ana Isabel ; Peña-Barragán, José Manuel Abbott, Derek

United States: Public Library of Science

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