Field hyperspectral imagery as a tool for plant monitoring: application to wheat nitrogen content - Archive ouverte HAL
Communication Dans Un Congrès Année : 2010

Field hyperspectral imagery as a tool for plant monitoring: application to wheat nitrogen content

Résumé

In the study presented here, we used a pushbroom CCD camera fitted on a motorised tractor rail to take hyperspectral images of wheat plots. Reflectance correction was performed using a ceramic plate as a reference. The hyperspectral images have been used to build nitrogen (N) content images for wheat plots using two Partial Least Square regression models. The first chemometrical model was calibrated on nitrogen contents (in percentage of dry matter, % DM) obtained in laboratory and flat leaf normalised spectra (5 latent variables, R² = 0.907, RMSEP = 0.326 N % DM); the second one on greenhouse pot plant leaf spectra (8 latent variables, R² = 0.919, RMSEP = 0.412 N % DM). Subsequently, they were directly applied to field plant spectra, providing images of nitrogen content. The range of nitrogen content values in these images was not satisfactory. Due to important spectral differences between greenhouse pot plant leaf spectra and field leaf spectra, a model calibrated directly on field leaves is necessary.
Fichier principal
Vignette du fichier
MO2010-PUB00029308.pdf (553.58 Ko) Télécharger le fichier
Origine Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-00581329 , version 1 (30-03-2011)

Identifiants

Citer

Nicolas Vigneau, Gilles Rabatel, P. Roumet, M. Ecarnot. Field hyperspectral imagery as a tool for plant monitoring: application to wheat nitrogen content. Conférence Internationale AgEng 2010 sur les Technologies agricoles, Sep 2010, Clermont-Ferrand, France. 9 p. ⟨hal-00581329⟩
432 Consultations
506 Téléchargements

Partager

More