In QGIS I have made a singleband pseudocolor image out of one of the bands from a RGB GeoTiff. I choose one band and then make a linear color interpolation (see attached image).
I now want to do the same thing the command line way (GDAL/Mapnik/etc) so I can get a workflow going, but I don't really know where to start?
My idea is to split the RGB image into three greyscale files for each band and then give each band a pseudocolor map. Any ideas of how to do this?