Thread: Stacking
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Old 20-08-2008, 10:54 AM
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Terry B
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[quote=jase;355681


Sum simply increases the noise in proportion to signal. There is no rejection.

[/quote]
Are you sure this is correct? According to Richard Berry in his book (Astronomical Image Proocessing) he states that summing increases the S/N ratio by the square root of the number of images taken. ie 4 images reduces the noise by 2x and 9 images by 3 x.
Last edited by Terry B; 20-08-2008 at 10:54 AM. Reason: typo
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