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.
Perhaps someone can explain me why. When I stack my lights, darks, flats and darkflats in APP, I get picture nr. 1. I had same tested in PI with WBPP, and as you can see on picture nr 2, it's all fine. Could someone tell me what things I might be doing wrong in APP
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@ancalime That's hard to say without more info. Which calibration data did you use? Which settings in APP? Which version of APP? Did you try to load the unprocessed PI file into APP and stretch it?
Normally I load my files, ie. 200 120s lights, 30 darks, 30 1s flats and darkflats (or flatdarks) in the 1st tab of APP. I subsequently leave all at tab 2 default, and press tab 3 and analyse the stars. When the stars are analysed, I uncheck the odd looking frames. I then leave tab 4 at defaults, tab 5 at defaults, and in tab 6 I leave intergrate on automatic, No LNC and I leave MBB as is, which is not enabled. When all is finished, I get the very overcorrected stack. APP wersion 1.083. See below the unprocessed PI stack loaded and stretched in APP. Also, I always have this workflow, but never had this kind of overcorrection
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hmmmm.... i also just decided to check all the frames... turns out that I have a few pure white frames in it.... guess we all make mistakes sometimes
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If I may chime in, I think I see the same in the PI result, just way less of a stretch. Can that be the case as well?
I fished out 10 pure white frames. I guess I forgot to get them out when I did APP, it might explain it. Without those, and in PI, it was a simple DBE and bob was again my uncle... havent tried in APP without those nasty white frames. But I think it's been an error on my side all along
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