TY - GEN
T1 - Effects of shoot-level structure on narrowband vegetation indices for Scots pine
AU - Mõttus, Matti
AU - Rautiainen, Miina
PY - 2012/1/1
Y1 - 2012/1/1
N2 - 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.
AB - 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.
KW - Photochemical Reflectance Index (PRI)
KW - photon recollision probability
KW - Pinus sylvestris
KW - shoot scattering
KW - vegetation structure
UR - http://www.scopus.com/inward/record.url?scp=84906568587&partnerID=8YFLogxK
U2 - 10.1109/WHISPERS.2012.6874261
DO - 10.1109/WHISPERS.2012.6874261
M3 - Conference article in proceedings
AN - SCOPUS:84906568587
SN - 978-1-4799-3406-5
T3 - Workshop on Hyperspectral Image and Signal Processing, Evolution in Remote Sensing
BT - 2012 4th Workshop on Hyperspectral Image and Signal Processing, WHISPERS 2012
PB - IEEE Institute of Electrical and Electronic Engineers
T2 - 2012 4th Workshop on Hyperspectral Image and Signal Processing, WHISPERS 2012
Y2 - 4 June 2012 through 7 June 2012
ER -