DESCRIPTION
i.fusion.brovey performs a Brovey transformation using
three multispectral and the panchromatic satellite image scene
channels. Three new channels are calculated according to the
formula:
DN_b1
DN_fused = ------------------------------- * DN_pan
DN_b1 + DN_b2 + DN_b3
The assignment of the channels depends on the satellite.
The module's help text (above) suggests for LANDSAT-7, QuickBird and SPOT.
NOTES
The command changes temporarily to the high resolution of the
panchromatic channels for creating the three output channels,
then restores the previous region settings. The current
region coordinates are respected. The three pan-sharpened output
channels may be combined with d.rgb or r.composite.
SEE ALSO
i.his.rgb,
i.rgb.his,
d.rgb,
r.composite
REFERENCES
- Original Brovey formula reference unknown, probably
Roller, N.E.G. and Cox, S., 1980. Comparison of Landsat MSS
and merged MSS/RBV data for analysis of natural vegetation.
Proc. of the 14th International Symposium on Remote Sensing
of Environment, San Jose, Costa Rica, 23-30 April, pp. 1001-1007
- Pohl, C., and J.L. van Genderen, 1998.
Multisensor image fusion in remote sensing: concepts, methods and
application. Int. J. of Rem. Sens., 19, 823-854.
- M. Neteler, D. Grasso, I. Michelazzi, L. Miori, S. Merler, and C.
Furlanello, 2005.
An integrated toolbox for image registration, fusion and classification.
International Journal of Geoinformatics, Special Issue
on FOSS/GRASS 2004 & GIS-IDEAS 2004 (in press)
AUTHOR
Markus Neteler, ITC-irst
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