i.rgb.his Transforms raster maps from RGB (Red-Green-Blue) color space to HIS (Hue-Intensity-Saturation) color space. Imagery (i.*) ParameterRaster|red|Name for input raster map (red)|True ParameterRaster|green|Name for input raster map (green)|True ParameterRaster|blue|Name for input raster map (blue)|True OutputRaster|hue|Hue|False OutputRaster|intensity|Intensity|False OutputRaster|saturation|Saturation|False