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Oddly specific feature

Oct 23, 2012, 04:31
Post: #1
Oddly specific feature
Is there a feature where I can take several low- light pictures and use GIMP to compute what is noise and what isn't? The concept is pretty straightforward, and I can see it being part of this software.
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Oct 23, 2012, 07:18
Post: #2
RE: Oddly specific feature
Gimp is mostly an interactive thing. You can do that (using "layer modes") but I won't recommend it, because that would be a lot of work (plus Gimp only works with 8-bit/channel so you quickly get roundoff errors).

ImageMagik is a command-line tool that can do this with better accuracy:

Otherwise there is certainly more suitable software for this, what you want to do is a very popular technique with amateur astronomers, so google the astrophoto forums. This kind of software will also aligns the images accurately before averaging.

Now answering your questions on
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