Modeling effects of illumination and plant geometry on leaf reflectance spectra in close-range hyperspectral imaging

M.A. Mohd Shahrimie*, Puneet Mishra, Stien Mertens, Stijn Dhondt, Nathalie Wuyts, Paul Scheunders

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference paperAcademicpeer-review

1 Citation (Scopus)

Abstract

While Hyperspectral Imaging (HSI) has been successfully applied for remote monitoring of vegetation, its use is still underdeveloped in close range settings, where a higher spatial and temporal resolution is applied to measure functional plant traits. Much more than remotely, leaf reflectance spectra in close range are very sensitive to plant geometry and specific alignment of the imaging system. In particular, the spectrum of each plant pixel heavily depends on its distance and inclination towards the light source and sensor. To deal with these effects, this work studies the influence of illumination and plant geometry on the recorded HSI in a specific indoor setup (PHENOVISION at VIB, Ghent, Belgium). Based on simple optical models, the reflectance spectra are modeled using multivariate linear regression. The obtained model coefficients are then used to correct the spectra. Finally, a commonly applied scatter correction method, the Standard Normal Variate (SNV) transformation is shown to remove the illumination and geometry effects.

Original languageEnglish
Title of host publication2016 8th Workshop on Hyperspectral Image and Signal Processing
Subtitle of host publicationEvolution in Remote Sensing, WHISPERS 2016
PublisherIEEE computer society
ISBN (Electronic)9781509006083
DOIs
Publication statusPublished - 18 Oct 2017
Externally publishedYes
Event8th Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing, WHISPERS 2016 - Los Angeles, United States
Duration: 21 Aug 201624 Aug 2016

Publication series

NameWorkshop on Hyperspectral Image and Signal Processing, Evolution in Remote Sensing
ISSN (Print)2158-6276

Conference

Conference8th Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing, WHISPERS 2016
CountryUnited States
CityLos Angeles
Period21/08/1624/08/16

Keywords

  • Close range hyperspectral imaging
  • Plant phenotyping

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