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Old 31-12-2016, 12:05 PM
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Merlin66 (Ken)
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Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,927
Stacking the same image doesn't add any new data.
The individual images have random (shot) noise both in the target and the background. By stacking these images the noise is reduced (relatively) and the target enhanced but the additional signal.
You can experiment yourself and see the difference.
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