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Comparing stacks SNR
Hi,
I'm tried different methods of stacking, changing algorithms, excluding some frames etc.
What would be the best way to compare SNR?
There are 2 scripts in PI, NoiseEvaluation and NoiseEvaluation (CFA Bayer).
Which one should be used on stacked OSC image?
And there are 2 numbers, noise and count(%).
Smaller numbers means better SNR or worse?
Thanks Adam
Comments
I've loaded 3 different stacks into SubframeSelector. (not sure if that makes sense to compare SNR this way?)
Image 1: All 3 sessions stacked in WBPP in PI 1.8.9
Image 2: All 3 sessions stacked in WBPP in PI 1.9.1 (16 frames rejected by WBPP)
Image 3: 2 sessions stacked in WBPP in PI 1.9.1 (no frames rejected)
Is it safe to assume Image 2 is best? It seems to be in the best spot on the graph if I look at PSF SNR and other options.
Although the SNR value in the column is smaller than the one of Image 1, so I'm confused which image has best SNR
Graph:
https://ibb.co/QYXHyV5