The main purpose of this pull request is to add support for automatic sky glow removal. It works by performing a gaussian blur on a copy of each light frame and subtracting that just after subtracting the dark frame. This almost completely eliminates the sky glow, as well as other annoyances such as clouds which may have drifted through. It is rather slow, but totally worth it for people with heavily light polluted skies as seen in this blog post
The main purpose of this pull request is to add support for automatic sky glow removal. It works by performing a gaussian blur on a copy of each light frame and subtracting that just after subtracting the dark frame. This almost completely eliminates the sky glow, as well as other annoyances such as clouds which may have drifted through. It is rather slow, but totally worth it for people with heavily light polluted skies as seen in this blog post
http://fstop138.berrange.com/2016/08/creating-star-trails-with-automatic-sky-glow-removal/
The other nice fix is to make use of high precision images in GIMP 2.9 to improve quality of the final result