NAME

       r.blend  - Blends color components of two raster maps by a given ratio.

KEYWORDS

       raster, composite

SYNOPSIS

       r.blend
       r.blend --help
       r.blend   [-c]   first=name   second=name   output=basename   [percent=float]    [--overwrite]   [--help]
       [--verbose]  [--quiet]  [--ui]

   Flags:
       -c
           Combine resulting R,G,B layers into single output map

       --overwrite
           Allow output files to overwrite existing files

       --help
           Print usage summary

       --verbose
           Verbose module output

       --quiet
           Quiet module output

       --ui
           Force launching GUI dialog

   Parameters:
       first=name [required]
           Name of first raster map for blending

       second=name [required]
           Name of second raster map for blending

       output=basename [required]
           Basename for red, green and blue output raster maps

       percent=float
           Percentage weight of first map for color blending
           Options: 0-100
           Default: 50

DESCRIPTION

       r.blend blends color components of 2 raster maps by a specified percentage of the first map.

EXAMPLE

       Blending the aspect map with the elevation map for a shaded map (North Carolina sample dataset):
       g.region raster=elevation
       r.relief input=elevation output=relief zscale=10
       r.blend -c first=elevation second=relief output=blend percent=75
       Figure: Elevation blended with shaded relief

SEE ALSO

        d.shade, g.region, r.shade, r.colors, r.his, r.mapcalc, r.rgb, r.support

AUTHORS

       Unknown: probably CERL
       Updated to GRASS 5.7 by Michael Barton, Arizona State University

SOURCE CODE

       Available at: r.blend source code (history)

       Accessed: Friday Apr 04 01:21:11 2025

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       © 2003-2025 GRASS Development Team, GRASS GIS 8.4.1 Reference Manual

GRASS 8.4.1                                                                                      r.blend(1grass)