i.rgb.his(1)

📦
version 8.4.2 · 8 versions
, in fedora 44

💅 i.rgb.his — the GRASS GIS glow-up page 🎀

okay bestie, so this is i.rgb.his, a manual page from the GRASS GIS User's Manual. She takes your RGB raster maps and transforms them into HIS. Color theory but make it geospatial. ✨

🌈 KEYWORDS

imagery, color transformation, RGB, HIS, IHS

iykyk 💖

✨ SYNOPSIS

i.rgb.his
i.rgb.his --help
i.rgb.his red=name green=name blue=name hue=name intensity=name
saturation=name  [--overwrite]  [--help]  [--verbose]  [--quiet]  [--ui]

🚩 Flags

  • --overwrite — let your output files overwrite files that already exist. slay, but careful 🫶
  • --help — prints the usage summary. the "what does this even do" button 💀
  • --verbose — verbose module output. she's chatty, we love that 🌸
  • --quiet — quiet module output. she's giving mysterious main character 🦋
  • --ui — force launching the GUI dialog. for when you want the whole aesthetic ✨

🎀 Parameters

  • red=name [required] — name of the input raster map, the red one 🔥
  • green=name [required] — name of the input raster map, the green one 🌿
  • blue=name [required] — name of the input raster map, the blue one 💙
  • hue=name [required] — name for the output raster map, the hue one 🌈
  • intensity=name [required] — name for the output raster map, the intensity one ⭐
  • saturation=name [required] — name for the output raster map, the saturation one 💅
not a single one of these is optional, bestie. all six. every time. no cap.

💖 DESCRIPTION

i.rgb.his is an image processing program that takes three input raster map layers — treating them as the red, green, and blue components — and produces three output raster map layers representing the hue, intensity, and saturation of the data. it's giving "deconstructed the color, rebuilt the vibe" 🧚

the output raster map layers are created by a standard red-green-blue (RGB) to hue-intensity-saturation (HIS) color transformation. that's the whole bit. iconic behavior, honestly.

each output raster map layer gets a linear gray scale color table. yes, all of them. she's consistent. 🌸

the current geographic region definition and mask settings are respected. periodt. 👑

👀 SEE ALSO

  • i.his.rgb — the reverse glow-up, if you ever need to go back 💜

👑 AUTHOR

David Satnik, GIS Laboratory, Central Washington University — with acknowledgements to Ali Vali, Space Research Center, for the core routine. absolute legends, fr fr 🫶

📜 SOURCE CODE

available at: i.rgb.his source code (history)

accessed: Saturday Jan 17 05:41:42 2026

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© 2003-2025 GRASS Development Team, GRASS GIS 8.4.2 Reference Manual

💌 and that's the whole page, bestie! this was GRASS 8.4.2 dropping i.rgb.his(1), and honestly? she ate. go transform something gorgeous. 💖✨🎀
📦 where this page comes from