Robert Clouser

It would be nice to be able to choose the reference frame for stacking, rather than always going with the frame with the highest quality. Thanks, Bob

Hi Han, First let me say that I should have added a question mark to the title of this topic. I didn't mean to imply that there is definitely bug. I did some experimenting and found that: (1) the hot pixel areas is less if you use smaller sigma cutoff (I went down as low as 2.0) (2) and with demosaicing algorithm AstroSimple I don't see those hot pixels at all. (I have usually been using bilinear.) I am stacking 142 60-sec lights and I have 100 darks, good flats and flat-darks. So I would have thought...

I went back and looked at some of my old images I stacked with astap. I DO see the same kind of bright spots/artifacts -- I just didn't notice them.

I tried with AstroC too -- is shows the bright spots same as with bilinear. I was doing this testing using the version from 2024.07.08.

Hi. I'm new to the forum. I've been using astap for a while now to stack my deep sky frames. I just upgraded to the newest version (2025.03.03) a few days ago and noticed some "flaky" behavior related to the new "quick" checkbox for analyzing lights. I also see bright pixel areas/artifacts that kind of resemble hot pixels that I don't see in the previous version of astap. I'm running astap on Windows 11. Here's a summary: 1) When I check or uncheck the "quick" checkbox, the table of lights kind of...