Noise Removal in Photos with Median Stacks (GIMP/G'MIC & Imagemagick)
In my recent experiments and playing around with even more image averaging in Imagemagick, I decided to have a look at some other methods for calculating pixel values. This time I focused on stacks of images of the same thing.
Why the same thing?

Because the (uninspired) above image was shot at ISO 25,600. Go look at it again.