r.blend

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

Command linePython (grass.script)

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

Example:

r.blend first=name second=name output=basename

grass.script.run_command("r.blend", first, second, output, percent=50, flags=None, overwrite=False, verbose=False, quiet=False, superquiet=False)

Example:

gs.run_command("r.blend", first="name", second="name", output="basename")

Parameters

Command linePython (grass.script)

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
    Allowed values: 0-100
    Default: 50
-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
--qq
    Very quiet module output
--ui
    Force launching GUI dialog

first : str, required
    Name of first raster map for blending
    Used as: input, raster, name
second : str, required
    Name of second raster map for blending
    Used as: input, raster, name
output : str, required
    Basename for red, green and blue output raster maps
    Used as: output, raster, basename
percent : float, optional
    Percentage weight of first map for color blending
    Allowed values: 0-100
    Default: 50
flags : str, optional
    Allowed values: c
    c
        Combine resulting R,G,B layers into single output map
overwrite: bool, optional
    Allow output files to overwrite existing files
    Default: False
verbose: bool, optional
    Verbose module output
    Default: False
quiet: bool, optional
    Quiet module output
    Default: False
superquiet: bool, optional
    Very quiet module output
    Default: False

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

AUTHORS

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

SOURCE CODE

Available at: r.blend source code (history)
Latest change: Saturday Apr 19 17:44:03 2025 in commit 24d7441