Grass_Image_HIS2RGBService - This service transforms hue-intensity-saturation (his) color space to red-green-blue (rgb) space. Each output raster map layer is given a linear gray scale color table.
Operations:
his2RGB - Processes three input raster map layers as hue, intensity and saturation components and produces three output raster map layers representing the red, green and blue of the data.
