%% $Date: 2012-07-06 17:42:54#$
%% $Revision: 148 $
\index{PRI}
\algdescgeneral{PRI}
%
{ %%%%%% Algorithm name %%%%%%
biophys\_indices (PRI is one index calculated within the overall program)
}
%
{ %%%%%% Algorithm summary %%%%%%
Calculation of Photochemical Reflectance Index (PRI), also Carotenoid/chlorophyll
}
%
{ %%%%%% Category %%%%%%
Biophysics - narrow band chlorophyll indices
}
%
{ %%%%%% Inputs %%%%%%
Narrow band multi- or hyperspectral imagery (ENVI standard image data) including channels close to the wavelengths of 529nm and 569nm.\bigskip
}
%
{ %%%%%% Outputs %%%%%%
Single band with PRI values
}
%
{ %%%%%% Formula %%%%%%
\begin{displaymath}
PRI = \frac{R_{529} -R_{569} } {R_{529} +R_{569} }
\end{displaymath}
}
%
{ %%%%%% Author %%%%%%
DLR-DFD
}
%
{ %%%%%% References %%%%%% 
Sims, D.A., Gamon, J.A. (2002): Relationships between leaf pigment content and spectral reflectance across a wide range of species, leaf structures and developmental stages. In: Remote Sensing of Environment, 81, p.337-354.
}
