@inproceedings{4143a0a059344353b4e2f1399734ecb4,
title = "Effects of shoot-level structure on narrowband vegetation indices for Scots pine",
abstract = "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.",
keywords = "Photochemical Reflectance Index (PRI), photon recollision probability, Pinus sylvestris, shoot scattering, vegetation structure",
author = "Matti M{\~o}ttus and Miina Rautiainen",
year = "2012",
month = jan,
day = "1",
doi = "10.1109/WHISPERS.2012.6874261",
language = "English",
isbn = "978-1-4799-3406-5",
series = "Workshop on Hyperspectral Image and Signal Processing, Evolution in Remote Sensing",
publisher = "IEEE Institute of Electrical and Electronic Engineers",
booktitle = "2012 4th Workshop on Hyperspectral Image and Signal Processing, WHISPERS 2012",
address = "United States",
note = "2012 4th Workshop on Hyperspectral Image and Signal Processing, WHISPERS 2012 ; Conference date: 04-06-2012 Through 07-06-2012",
}