Quote:
Originally Posted by Bassnut
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.
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I use nearest neighbourg all the time. If I have a lot of subs it works alright. On two subs it's not good. You'd use bicubic b-spline. Nearest neighbourg will move entire blocks of your subs to align them, like solid tiles without resampling or blurring the lot. So you keep the noise sharp and it's easier for the data rejection algorithm to paint outliers. If you use bicubic b-spline you'll interpolate all those pixels in between the stars and smear the noise. So it's harder for the data rejection algo to do its job. That's my understanding from Adam Block's tutorials.