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. Â Before I release it, I will make sure that everything is working properly and then I will release it.
Hi Mabula @mabula-admin  I am making a mosaic of the large Supernova Remnant near the Rosette and Cone Nebula. When post processing I noticed some checkerboard noise and some smaller scale noise in the OIII data. I created four very irregular "panels" by stacking data from 4-6 sessions looking at slightly different areas around the 4 panels. I over stretched the Ha and color mosaics and uncovered the same noise. I went to the individual panel that made up the worst area and noticed the noise. I then stacked each component of the panel and didn't see the noise in the individual components. I stacked the components to recreate the panel and the noise was there again. I have been using LNC 1st degree with 3-10 iterations and MBB on. The first picture is the original mosaic area that first caught my eye. The second picture is the component picture of that same area... note that I did apply NoiseXTerminatior to the image. The third image is a mosaic using the components images and you can see the noise in the right top corner. thank you
Tim Stevenson
Note that the images are in reverse order ... first is third... third is first.
Update: I have been running a lot of experiments but the large scale noise (checkerboard) could a result of NoiseXterminator in PixInsight. I will continue to run experiments.
Update 2: NOT caused by NoiseXterminator alone. I went back to the original OIII mosaic and only stretched it with HistrogramTransformation... no BlurX or NoiseX.
Its usually caused by bad data and the starxterminator.Â
Stefan, thank you so much for your reply. I was just coming to add an update when I saw your reply. You are correct on both fronts. I found ONE stray frame in one of my panels that caused lots of noise and it appears that the noise along with StarX that causes the issues.
Hi Tim @tstevens83 and Stefan @digitaliz-se,
Thank you very much for reporting this. Can I conclude that this issue is not related to APP then? Is all caused by StarXTermnator?
It looks lik that tool works in tiles on the data and makes a mess off it on your data.
Can I close the issue here?
Mabula
