Quote:
Originally Posted by ErwinL
Ah, ok, I see things are a bit different in PixInsight (which I never used). What I'm doing regularly and meant in my question is sub-pixel alignment and interpolation without upscaling. The basic calculations are comparable to drizzling but the image size remains unchanged.
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Hi Erwin, the default interpolation done by PixInsight image registration is sub-pixel interpolation without upscaling. You can also set the interpolation to be nearest neighbour but I doubt that many people do.
Quote:
Originally Posted by ErwinL
Rick: Do you think this is also valid for this 'in-place' drizzling-like interpolation? (Unfortunately, my equipment and the seeing at my location do not allow undersampling, so I can't do real tests.)
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With a FSQ-106ED and KAF-16803 sensor I have an image scale of 3.5 arcsec/pixel. Even with sub-pixel registration smaller stars don't cover many pixels and they look blocky. Drizzle x2 is a big improvement in this case.
Cheers,
Rick.