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Národní úložiště šedé literatury Nalezeno 2 záznamů.  Hledání trvalo 0.01 vteřin. 
Modelling 3D Forest Structure for Improved Retrieval of Forest Biophysical Properties
 Janoutová, Růžena ; Albrechtová,, Jana (oponent) ; Štarha, Pavel (oponent) ; Martišek, Dalibor (vedoucí práce)
The main goal of the thesis was to improve quantitative estimation of vegetation parameters of spruce stand using spectral simulations of three-dimensional radiative transfer model. In the first step, the precise computer 3D model of a spruce tree was created. Since implementation of such precise representation was computationally too demanding for a larger forest canopy, the 3D model had to be simplified. The optimal simplification was found using available spectral airborne data and through comparison with the original 3D spruce model. The optimal simplification yielded an acceptable compromise between computation requirements and accuracy of radiative transfer simulations reproducing the forest stand reflectance. The optimized simplification was subsequently used in retrievals estimating the vegetation parameters from a spectral satellite image. Accuracy of the estimates was validated through comparison with field measurements of retrieved parameters.
Úplný záznam
Modelling 3D Forest Structure for Improved Retrieval of Forest Biophysical Properties
 Janoutová, Růžena ; Albrechtová,, Jana (oponent) ; Štarha, Pavel (oponent) ; Martišek, Dalibor (vedoucí práce)
The main goal of the thesis was to improve quantitative estimation of vegetation parameters of spruce stand using spectral simulations of three-dimensional radiative transfer model. In the first step, the precise computer 3D model of a spruce tree was created. Since implementation of such precise representation was computationally too demanding for a larger forest canopy, the 3D model had to be simplified. The optimal simplification was found using available spectral airborne data and through comparison with the original 3D spruce model. The optimal simplification yielded an acceptable compromise between computation requirements and accuracy of radiative transfer simulations reproducing the forest stand reflectance. The optimized simplification was subsequently used in retrievals estimating the vegetation parameters from a spectral satellite image. Accuracy of the estimates was validated through comparison with field measurements of retrieved parameters.
Úplný záznam

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