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UPDATE FROM MABULA

I have had a very rough 2 months unfortunately health wise. I was struck 3x in a row with bacterial infections. The second infection occurred  after a routine hospital checkup and I became very sick. I had to rest and take a lot of antibiotics. Once I was recovering and restarting work 1 month ago, I again became sick. The infection was not yet gone, so even more antibiotics and rest was needed. Needless to say, it took a lot of my energy and I needed a lot of rest.

 

Finally, the infection is really gone and my energy is coming back step-by-step now and I have started work again. I am terribly sorry to have kept you waiting for support. I will address all outstanding questions and e-mails step-by step and will be on the forum daily from today.

 

APP 2.0.0-beta47 will come soon as well, a lot of work was already completed before I became very ill, so the release is also nearly ready for you. Beta47 will be much faster actually. Many workflows will be more than 2x faster, mosaics can even be 10x faster than before because registration really received a major boost... all compared to beta46.  Before I release it, I will make sure that everything is working properly and then I will release it.

Mosaic Normalization Issue

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(@mountainair)
Red Giant
Joined: 6 years ago
Posts: 52
Topic starter  

I would really appreciate some guidance here.

I shot a 2x1 panel mosaic of NGC 7000.  Both panels came out well, but for some reason when I stitch them together in mosaic mode in APP the bottom panel turns out very milky.  It's obviously a normalization issue.  That individual panel is perhaps slightly milkier, but it seems that way (I think) mostly because of the increased star count and not because it was encroaching on a light dome (these subs finished before that).

I've uploaded the two panels to the MountainAir-NormalizationIssue folder on FileStation.

Here's the result:

Screenshot 2023 07 14 at 10.08.42 AM

Thanks in advance!

 



   
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(@mountainair)
Red Giant
Joined: 6 years ago
Posts: 52
Topic starter  

A few observations:

  1. The auto-stretch in APP exacerbates the problem; the mosaic doesn't look as bad in PixInsight, but still far from desirable.
  2. I took the individual panels through the ABE process in PixInsight with the normalization checkbox checked (ABE worked no worse than my quick DBE attempt in this case).
  3. I took the panels back to APP and stitched them together.  The effect was less pronounced, but easily still visible.
  4. Opening the mosaic with PI's default autostretch didn't look as bad.
  5. Running ABE again, I was able to substantially reduce the milkiness effect.  It's not perfect, but much better and may be usable.

I confess to not being as familiar with APP's post-stacking tools.  I'm sure I could do most of this there, but there still may be some setting or workflow that I missed.  Or, maybe this is an opportunity to train APP's mosaic normalization process using my individual panels.

BTW, I should have said I follow all the standard guidelines for mosaics in APP, including using Advanced mode in Normalization.  Any ideas on what I may have missed?  Most of my other mosaics turn out fine from a normalization perspective.

Thanks in advance!



   
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(@Anonymous 174)
Joined: 9 years ago
Posts: 5702
 

When you make a mosaic, it's always best to first make it and then do the LPC correction. Correcting the panels beforehand may not work very well, though they look good, the background can still be different per panel.



   
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