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Stretching in 32bit
Hi,
I've always had trouble with getting good luminance in my backyard in Brisbane (not surprisingly). Have been experimenting with various ways to stretch an image and retain enough detail.
I don't have Start Tools or PixInsight so have previously been doing this in Photoshop. It does not handle 32bit image at all well so looked around for alternatives. GIMP does handle 32bit quite well so have been using that as well.
Attached are before and after images using a technique of many iterations of:
1. Adjusting Gamma (via levels) to darken a little
2. Stretching using Curves a little
Image is a stack of 300 second and 0 gain from an ASI1600mm-Pro on a 200mm F5 Newt.
If you ignore the artifacts caused by dust and insufficient flat fames, I think it is OK.
Your thoughts?
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