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
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Getting a really frustrating problem with the light pollution tool
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It happens with Ha Oii ectracted files when in RGB combine and ha oii colour extraction
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Pic is fine but greenish but turns red when the light pollution tool is selected and when used goes more green and washed out
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Any thoughs?
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Ta
Paul
When I use the RGB Combine tool with the Ha & Oii extracts its just all red.....
This is the ha oii colour stack...ok until i press neutralise background
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Would you be able to upload your data? Preferably a subset of the raw data, so like 20 darks, 20 flats, 20 lights, etc.
@vincent-mod Hi
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Thanks but its not accepting the files.
Is there a size restriction?
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ah...ok...some are fai;ing to upload and some are slow...lots of queing..they are on the way 🙂
Ok..all uploaded...the dark flats are dark flats despite the file saying lights 🙂
Ok thanks, I'll see if I can figure them out. 🙂
Hi Paul, it seems the lights didn't upload correctly, I see txt files instead of fits files.
Sorry mate Doh...Just adding 10 lights now 🙂
All done..added a new folder called lights and they are in there 🙂
Thanks Paul, apologies for the delay, I'll have a look again today.
I think I know what's going on, in the combine tool you need to use the HSO 2 formula, that will mix green and blue better with the OIII signal. I also had to manually tell APP what was H-alpha and what was OIII, it standard showed "Custom".
Neutralize on this didn't look strange, neither did light pollution removal. I used the "Extract-Ha" and "Extract-OIII" settings in tab 0 to load the data. Could you tell me in more detail what your steps are?
Hi
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Same issue with RGB combine on my next pic
Did your suggestion and this is the output. I removed APP and reinstalled....I have not made any changes to the set up since it worked correctly
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I added the extracted files and told APP what was Ha and what was Oii
The last pic shows Ha Oiii combined using the extracted files.
Is there a reset button for APP.....
" I used the "Extract-Ha" and "Extract-OIII" settings in tab 0 to load the data"Â I dont understand what you mean here sorry. I extracted the ha oii in tools and loaded them in RGB combine tool and told app what the files were
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Losing faith now
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The formulae don't seem correct, do you press the "new formula" button after having selected a new formula? Select HSO-2 and then new formula.
And yes, there is a reset for APP in the CFG menu on the top left. These will reset settings.
Ok...reset APP > Added Ha and told APP its Ha > added oiii and told APP its oiii....selected HSO2 and pressed new formula and recalculate...same...pressed new formula again and recalaucate and the same....
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I cant think of anything else now
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I'm re stacking the data fresh and starting again
Strange
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Re extracted the Ha & Oiii and redid everything the same and it works....so if it happened again i'll know what to do 🙂
Thanks for the time in helping me solve this 🙂
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No problem! Might have been a setting that was wrong somehow perhaps. Glad I could help!
