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NAME

i.fusion.brovey - Brovey transform to merge multispectral and high-res panchromatic channels

KEYWORDS

raster, imagery, fusion

SYNOPSIS

i.fusion.brovey
i.fusion.brovey help
i.fusion.brovey [-lqs] ms1=string ms2=string ms3=string pan=string outputprefix=string [--overwrite] [--verbose] [--quiet]

Flags:

-l
sensor: LANDSAT
-q
sensor: QuickBird
-s
sensor: SPOT
--overwrite
Allow output files to overwrite existing files
--verbose
Verbose module output
--quiet
Quiet module output

Parameters:

ms1=string
raster input map (green: tm2 | qbird_green | spot1)
ms2=string
raster input map (NIR: tm4 | qbird_nir | spot2)
ms3=string
raster input map (MIR; tm5 | qbird_red | spot3)
pan=string
raster input map (etmpan | qbird_pan | spotpan)
outputprefix=string
raster output map prefix (e.g. 'brov')

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

AUTHOR

Markus Neteler, ITC-irst

Last changed: $Date: 2005-03-02 06:51:25 -0800 (Wed, 02 Mar 2005) $


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