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Retrieval of chlorophyll concentration from leaf reflectance spectra using wavelet analysis.

Blackburn, George Alan and Ferwerda, Jelle Garke (2008) Retrieval of chlorophyll concentration from leaf reflectance spectra using wavelet analysis. Remote Sensing of Environment, 112 (4). pp. 1614-1632. ISSN 0034-4257

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Abstract

The dynamics of foliar chlorophyll concentrations have considerable significance for plant–environment interactions, ecosystem functioning and crop growth. Hyperspectral remote sensing has a valuable role in the monitoring of such dynamics. This study focussed upon improving the accuracy of chlorophyll quantification by applying wavelet analysis to reflectance spectra. Leaf-scale radiative transfer models were used to generate very large spectral data sets with which to develop and rigorously test refinements to the approach and compare it with existing spectral indices. The results demonstrated that by decomposing leaf spectra, the resultant wavelet coefficients can be used to generate accurate predictions of chlorophyll concentration, despite wide variations in the range of other biochemical and biophysical factors that influence leaf reflectance. Wavelet analysis outperformed predictive models based on untransformed spectra and a range of spectral indices. The paper discusses the possibilities for further refining the wavelet approach and for extending the technique to the sensing of a variety of vegetation properties at a range of spatial scales.

Item Type: Article
Journal or Publication Title: Remote Sensing of Environment
Uncontrolled Keywords: Chlorophyll ; Leaf ; Reflectance ; Hyperspectral ; Wavelet transform
Subjects: G Geography. Anthropology. Recreation > G Geography (General)
Departments: UNSPECIFIED
ID Code: 9141
Deposited By: Dr GA Blackburn
Deposited On: 28 May 2008 14:01
Refereed?: Yes
Published?: Published
Last Modified: 23 Jul 2014 14:53
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/9141

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