2026-10-09 APP 2.0.0-beta48 has been released !
This is mainly a bug fix release for the reported bugs in beta47. In addition it has a significant User Interface performance improvement noticable when you need to process 1000s of images in APP.
2026-10-03 APP 2.0.0-beta47 has been released !
This is a very big release... many code optimizations/rewrites, many parts of APP are much faster and more precise, especially star analysis and registration are much faster ! Big mosaics will go much faster 🙂
And we introduce a new preview filter, which includes the new Adaptive Deep Sky Stretch and a General Levels Stretch, this has been long over due. The old preview filter (the panel on the right side to stretch and preview your data) has not been updated for a couple of years and it is a critical part of any APP session.
Adaptive Deep Sky Stretch or ADSS is a much more intuitive stretch algorithm. It is also color preserving (which is a great new addition in itself ! ) which means that the highlights are no longer bleached, color is maintained from the linear data while stretching. You can simply stretch your data using the sky background level and signal width sliders which work much easier and more intuitive. You no longer need to fiddle with the old complicated sliders with zoom buttons. All the zoom buttons for the sliders are made redundant. And you can enter slider values in the slider value fields yourself. I will make a youtube video in the coming days to explain and fully introduce ADSS. Once the video is ready, it will be highlighted on the forum.
RGB Combine upgrade !. The RGB Combine Tool has been rewritten mostly. The tool is faster and easier to use and most importantly, the Luminance slider to inject a luminance channel or channels into the RGB composite is now working correctly. It no longer bleaches the RGB colors. Combined with the new ADSS preview, you will get much better and easier great composites with great color! I will also explain this in a new youtube video.
Hi to all.
5 sessions with just 4th one with different FOV and image scale.
As per Mabula's tooltips, I should use Advanced mode in the Normalization tab because FOV and image scale are different across all lights.
If I use Advanced mode in the Normalization mode tab:
Instead, if I use Regular mode:
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It should be exactly the opposite.
Am I wrong in what I understand from Mabula's tooltip?
Hi @ippiu,
No you understand it right, better to use advanced normalization then.
The first screenshot looks bad with a weird histogram indicating a data problem. What does APP show in the frame list panel for the analytical results like background, scale, SNR, noise?
Mabula
Here attached 2 screenshots of all analytical results...
If you want, please, I can upload exactly these all files I used for test, and you can have a look.
Thanks
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Hi Mabula.
Any idea?
@ippiu, the 600 sec subs have very low sky background values compared to the other frames.. Any idea why? There might be a problem there with the data somehow.
I guess all data was shot with the same camera but different telescopes, right?
Please upload some data of the different session so the problem occurs and I will have a look 😉 use the upload details as shown on the Top Right of the forum.
Mabula
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@ippiu,Â
I guess all data was shot with the same camera but different telescopes, right?
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Hi Mabula.
Yes, same camera and same telescope too. But different focal length.
I uploaded exactly the same files I used for tests, included master calibration flats, darks and BPM.
https://upload.astropixelprocessor.com/sharing/1ebOB9Ite
Thanks so much for your efforts and helpÂ
@ippiu,Â
I guess all data was shot with the same camera but different telescopes, right?
Â
Hi Mabula.
Yes, same camera and same telescope too. But different focal length.
I uploaded exactly the same files I used for tests, included master calibration flats, darks and BPM.
https://upload.astropixelprocessor.com/sharing/1ebOB9Ite
Thanks so much for your efforts and helpÂ
Hi @mabula-admin.
Did you have time to have a look?
Thanks
Hi @ippiu,
Thank you very much for your upload. I have found the issue. It is a bug in the normalisation engine combined with the adaptive pedestal. Some if your data needs a pedestal and some of the frame don't. And apparently in the advanced normalization this is not working correcly.
If you disable the adaptive pedestal, you will see, the problem is not there. So you encountered a bug in advanced normalization combined with the adaptive pedestal.
I will fix it for the next release, thank you very much for reporting it.
Mabula
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Glad to hear that I can help you in finding some issues and bugs in APP so you can improve it better.
Thanks for your help
It is a bug in the normalisation engine combined with the adaptive pedestal.Â
If you disable the adaptive pedestal,
Where is adaptive pedestal setting? I can't find it under normalisation tab
Where is adaptive pedestal setting? I can't find it under normalisation tab
At the bottom of tab 2. The option is called "adaptive pedestal/reduce Amp-Glow".
