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Old 29-10-2010, 10:11 PM
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Moon (James)
This sentence is false

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Join Date: Oct 2008
Location: Melbourne
Posts: 1,158
Quote:
It is not a data reject process in CCD stack2, its a resample after align, so it makes sence it would make a difference in resizing. The samples I posted were all bin 1, perhaps it would make more of a diff with a mix of bin1-bin2 subs.
I know the resample happens with the align - the thing Adam Block points out is that if you use 'nearest neighbor' then you can do better data rejection on the stack after **the align**. A hot pixel will still look hot (statistically) whereas if you align with something like Bicubic B-spline, the hot pixel is now averaged out a bit and won't look so hot, and thus harder to reject.
If you dither the images, then this will make the hot pixels stand out like .... well you know the saying.
James
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