|
Gimp would do fine but you need the 16-bit colour version for serious editing (v2.9 iirc), which is still in beta and a pain to install. Otherwise quantisation noise will get you with only 8-bits per colour. This is the biggest shortcoming of Gimp and has been for a long time. I think the developers have their priorities wrong or maybe there simply just aren't enough developers. (Users have been crying out for more than 8-bit colour support for a decade or more.) The Gimp is okay for the final stages of editing and some basic stuff but not for serious work. At least not the current stable release v2.8.
Imagemagick is a lot more powerful (and will do 32-bit colour, int or float) but also a lot less user friendly. Sorry I don't have a straight answer to your question. Just thought you should be aware of the gimp's limitations before you invest too much time. But if do you get v2.9 working I'd like to hear about it.
|