DESCRIPTION
The r.colors.contrastbrightness module generates
a contrasted version of the input raster map.
The contrast is the gain of the affine transform, use values of 1.0-3.0 in case of an 8 bit image.
The brightness is the bias of the affine transform, use values of 0.0-100.0 in case of an 8 bit image.
EXAMPLES
Contrast enhancement of an 8-bit raster band
This does nothing to the image:
r.colors.contrastbrightness min=0.0 max=255.0 contrast=1.0 brightness=0.0 input=myinraster output=myoutraster
This does change the contrast of the image:
r.colors.contrastbrightness min=0.0 max=255.0 contrast=3.0 brightness=0.0 input=myinraster output=myoutraster
This does change the brightness of the image:
r.colors.contrastbrightness min=0.0 max=255.0 contrast=1.0 brightness=100.0 input=myinraster output=myoutraster
SEE ALSO
r.colors,
v.colors,
r3.colors,
r.cpt2grass,
r.colors.matplotlib
AUTHOR
Yann Chemin, JRC, Ispra, Italy
Last changed: $Date$