Classification of Maize in Complex Smallholder Farming Systems Using UAV Imagery

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

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.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • Swedish University of Agricultural Sciences
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Kulturgeografi

Nyckelord

Originalspråkengelska
Artikelnummer22
Sidor (från-till)1-8
Antal sidor8
TidskriftDrones
Volym2
Utgivningsnummer22
StatusPublished - 2018 jun 22
PublikationskategoriForskning
Peer review utfördJa

Relaterad forskningsoutput

Sussy Munialo, Ola Hall, Maria Archila, Niklas Boke-Olén, Onyango M., C., Oluoch-Kosura, W., Marstorp, H. & Göran Djurfeldt, 2019 okt 11, I : Agriculture. 9, 219, 24 s., 219.

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

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