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TitreNumerical procedures and computer program for fitting an inverted gaussian model to vegetation reflectance data
AuteurBonham-Carter, G F
SourceComputers and Geosciences vol. 14, no. 3, 1988 p. 339-356, https://doi.org/10.1016/0098-3004(88)90065-9
Année1988
Séries alt.Commission géologique du Canada, Contributions aux publications extérieures 24187
ÉditeurElsevier BV
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1016/0098-3004(88)90065-9
Mediapapier; en ligne; numérique
Formatspdf
Sujetsvégétation; méthodes statistiques; applications par ordinateur; logiciel; réflectance; géomathématique
Résumé(disponible en anglais seulement)
Four alternative procedures are outlined for fitting an Inverted Gaussian Model to vegetation spectra in the red-edge region, 680-800 nm. Two procedures use a linearized equation, resulting in computational efficiency. Two procedures use nonlinear optimization which is demanding computationally but always gives a superior fit to the data. The wavelength parameters, lamda o and o, that define the position and shape of the model, are used to measure spectral shifts of the red-edge. The red-edge is reported to differ in position in vegetation under stress, so images of lamda o and o derived by fitting the model to spectra measured from airborne sensors may be used to map the spatial extent of vegetation stress. A FORTRAN 77 program for making the fitting calculations is included in the Appendix.
GEOSCAN ID123756