Coloring Astronomy Images

In one of the [last videos of DONG](https://youtu.be/yPvyrPcJisg?t=201) by VSauce they mentioned this thing of Coloring raw photos of telescopes. There is material and a tutorial to do it with [GIMP](http://chandra.harvard.edu/photo/openFITS/). Seems to be a very interesting topic and I'm wondering if there a good way of do the same thing in processing or p5 with and interface and all sort of things.

I'm going to try to do this in the next days but if you found it interesting as a challenge to your channel It would be awesome. Thanks for the time. Your work really inspires me.