r.rgb(1grass)

✨ r.rgb — the manual, but make it cute ✨

okay bestie, grab a boba, because we're reading the r.rgb page from the GRASS User's Manual and it's honestly giving "tiny tool, huge slay" 💅

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🌈 NAME

r.rgb — splits a raster map into red, green and blue maps. that's it, that's the whole job, and it does it flawlessly 💖

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🏷️ KEYWORDS

raster, RGB, separate, split

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🎀 SYNOPSIS

r.rgb
r.rgb --help
r.rgb input=name  [red=name]   [green=name]   [blue=name]
[--overwrite]  [--help]  [--verbose]  [--quiet]  [--ui]

🚩 Flags

• --overwrite — lets your output files just bulldoze over existing files. respectfully, be careful.
• --help — prints the usage summary so you can stop guessing.
• --verbose — verbose module output, i.e. the module talks more.
• --quiet — quiet module output, i.e. the module shuts up.
• --ui — forces the GUI dialog to launch. main character energy, but graphical.

🧚 Parameters

• input=name [required] — name of the input raster map. this one is non-negotiable, you must hand it over.
• red=name — red channel raster map name.
• green=name — green channel raster map name.
• blue=name — blue channel raster map name.

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💖 DESCRIPTION

so r.rgb takes a raster map — plus the color table attached to it (the grey255 one) — and generates separate red, green and blue maps out of it. three maps. one input. iconic behaviour, no cap. 🌸

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✨ EXAMPLE

first, set up your region like a responsible queen:

g.region raster=elevation -p
r.rgb input=elevation red=elevation.r green=elevation.g blue=elevation.b

and in this case, r.rgb produces three new raster maps in the current mapset — literally 'elevation.r', 'elevation.g', and 'elevation.b'. obsessed. 🫶

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👀 SEE ALSO

r.composite, r.blend, r.colors, r.mapcalc

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👑 AUTHOR

Glynn Clements

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🦋 SOURCE CODE

Available at: r.rgb source code (history)

Latest change: Thursday Feb 20 12:48:50 2025 in commit: 1633be4dc57dd1819a0f6ccd8ea4bc2b8bbec864

Main index | Raster index | Topics index | Keywords index | Graphical index | Full index

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and that's the whole page bestie, every flag, every parameter, every path, all of it. go split some rasters, you're gonna eat 💅✨

so yeah — this was GRASS 8.5.0 Reference Manual, © 2003-2026 GRASS Development Team, and the manual page itself is r.rgb(1grass). version GRASS 8.5.0, slay, periodt 🎀🌈💜