I use AS3! For solar imaging.
If you look at the graph....
The vertical line as are at 25/50/75% of the quantity of subs
The horizontal lines are the quality rating lines, 75/50 and 25%
I usually use the point where the green line would drop below say 90% to determine, roughly the number of frames to stack....
Using the selection of say “best 10%” allows you to look at the green curve to estimate the number of frames being stacked.
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