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But Doug if one does ICNR, it relies heavily on the fact that the noise in the "dark" shot is very closely matched to the noise in the previous light shot. This means a sensor that is capable of repeatability at the pixel level which I am not sure how true this is.
Whereas if one were to stack a bunch of darks, you are statistically getting closer to the true noise captured statistically in all of your lights stacked?
ICNR is very tempting but I haven't been too excited about its results.
I'll need to research more but my understanding is that stacking is mathematically approaching a truer representation of what should be there (noise and actual light)
Cheers,
Darrin...
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