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But really this pops up across a large cohort, with many different optics, sensors, and stackers. I would assume the same. But I cannot prove, of course. And Ivo's testsets don't seem to be affected that much, as he wrote. I wonder if it would be helpful to reread some older threads to identify som...

Dietmar I was curious what you used to create the profile viewer app? At first I was thinking that adding a checkbox or toggle button to set TopMost on the form would be handy, so that we could watch the profile change as we altered stretching parameters. But, the viewer doesn't react to live chang...

Yes, it seems only two distinct values are assigned to the core regions of bright stars. The max value to the 'inner core' and then just one slightly lower value out for a distance surrounding it. The max value of the inner core is caused by saturation in your and in my example. But for non-saturat...

Now we have to think about why this is happening. A 'plateau' means, that a range of input brightness levels is mapped onto the same output brightness level. I suspect that OptiDev constructs its stretching curve depending on the distribution and weighting of the input brightness levels. So OptiDev ...

No need to share, Ron. I was able to reproduce this easily with my latest own dataset containing saturated stars: Stellar profile as displayed in Fitswork (this is independed of the actual active stretch!): 2024-03-22 17_52_53-Fitswork.jpg FilmDev: 2024-03-22 17_45_48-StarTools.jpg OptiDev (full ROI...

:lol: :thumbsup: Of course, the outer bright ring is an illusion. But this 'plateau' around the inner core doesn't seem to be correct. Probably indeed an OptiDev issue, which maybe would explain the reported problems with HDR and SV Decon as well ... ? But we have to dig deeper into it. I would sugg...

Wow! Indeed an illusion. My work is calling ... will reply again on the weekend.

Perhaps begin by staying in the linear realm, and thus a linear stretch -- just adjust black and white points enough to (hopefully) begin seeing what's in the pixels where the fluctuations would start happening. Siril should be able to do that readily in linear with the user sliders. Yep! I too thi...

Though that reminds me too - do you remember if there was a "in the works" features and docs page for 1.9? I thought there was but maybe I dreamed it. I'm still using the main features and docs for my background reading. Sorry, Mike. I can't remember and a quick search and scanning of the 1.9 previ...

Hi Martin Startrek , thanks for your reply :) . I cannot quote, because this thread is too long and your text is already out of reach. So I will quote the old school manual way ;) Martin wrote: "I’ve persevered with 1.8 SV Decon for over a year and have reluctantly switched back to 1.7 I just can’t ...