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.
Good night,
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I've been using APP flawlessly during several years. Right now I have upgrade to an ASI294MM and I'm finding that my images show some strange stacking patterns (vertical lines). No sign of this patterns on: BIAS (0,1"), FLATS (0,2"), DARKS (120"), BAD PIXEL MAP. So I guess it could be APP that introduces it...
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Here there is a sample image on M13 region to see it: Single 120" Luminance (Baader filter 31mm) 120Gain_30Offset image:
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@aleix To me these look like hot pixels that have been shifted a bit during the night. Are you sure that your darks are good so that APP can get rid of the hot pixels?
Thanks @wvreeven for your quick reply. I just started a new serie of darks and bias to see if the problem comes from there. I'll keep you updated.
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Could it be related because I left all at deffault mode? I did not adjust any clipping settings.
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Thanks again,
Aleix
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I captured new DARKS, BIAS and the problem persists. I also used MEDIAN SIGMA and also persists. Could it be caused by tha lack of dark_flats? My flats were 0.5" exposure... I only captured 0.1" BIAS, no dark_flats.
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Thanks so much,
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Aleix
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@aleix Can you upload some lights and some calibration data to
https://upload.astropixelprocessor.com
using upload3 for both username and password? Create a folder aleix_hot_pixels and put the data in there. Then we can have a look and try to help you. Thanks!
With CMOS camera you should avoid taking bias: instead, it's mandatory to take dark-flats.
Then you should take flats with longer exposure, to say at least above 1 sec, better from 2 sec.Â
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Thanks. I'll try that as well. My flats are 0,5" in average... Should I capture 2"?? Not the exact amount of time?
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Never had this problem with my old ASI1600MM. Worked with BIAS along 4 years (maybe I had issues that were not that bad).
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Thanks again.
I usually take my flats with 2 second exposure if i use l-pro filter; 3 second with l-extreme. Unity gain. 50 in total.
I'm using a cheap Lacerta led panel with dimmable light so that I can adjust light to match exactly above exposures depending on filter used.Â
@aleix Can you upload some lights and some calibration data to
https://upload.astropixelprocessor.com
using upload3 for both username and password? Create a folder aleix_hot_pixels and put the data in there. Then we can have a look and try to help you. Thanks!
Already done. Thanks for your support. As always, excellent!!
@aleix Can you upload some lights and some calibration data to
https://upload.astropixelprocessor.com
using upload3 for both username and password? Create a folder aleix_hot_pixels and put the data in there. Then we can have a look and try to help you. Thanks!
Already done. Thanks for your support. As always, excellent!!
@aleix Thanks a lot. In tab 2 at the bottom in the Cosmic Correction section I enabled "hot pixel kappa" and left it to 3.0 and then the hot pixels disappeared. Please give that a try and lower it to 2.5 if 3.0 doesn't work for you.
@aleix Thanks a lot. In tab 2 at the bottom in the Cosmic Correction section I enabled "hot pixel kappa" and left it to 3.0 and then the hot pixels disappeared. Please give that a try and lower it to 2.5 if 3.0 doesn't work for you.
Many thanks. Right now just trying this setting. I'll update soon.Â
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Thanks and best wishes,
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Aleix
Problem solved! Thanks so much for your really fast solution.Â
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As always, APP always there when things go wrong. Many many thanks!
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Regards,
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Aleix Roig
