Effects of shoot-level structure on narrowband vegetation indices for Scots pine

Matti Mõttus, Miina Rautiainen

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


We measured simultaneously the spectral albedo of ten Scots pine shoots, and the needles constituting the shoots, in Zurich, Switzerland. Next, we used the spectral information to calculate the photochemical reflectance index (PRI) which allows to retrieve photosynthetic productivity from imaging spectroscopy data. Using p-theory, we showed that PRI values can be scaled between needle and shoot levels using photon recollision probability and the harmonic mean of needle spectral albedo at the wavelengths used in the index. As a comparison, we used narrowband NDVI and demonstrated that despite mathematical similarity, the two indices scale differently. Contrary to NDVI, the needle-level information contained in PRI scaled well to the level of the shoot.

Original languageEnglish
Title of host publication2012 4th Workshop on Hyperspectral Image and Signal Processing, WHISPERS 2012
PublisherIEEE Computer Society
ISBN (Print)9781479934065
Publication statusPublished - 2012
MoE publication typeA4 Article in a conference publication
EventWorkshop on Hyperspectral Image and Signal Processing - Shanghai, China
Duration: 4 Jun 20127 Jun 2012
Conference number: 4


WorkshopWorkshop on Hyperspectral Image and Signal Processing
Abbreviated titleWHISPERS


  • Photochemical Reflectance Index (PRI)
  • photon recollision probability
  • Pinus sylvestris
  • shoot scattering
  • vegetation structure


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