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.
Just wondering what is the best way to process narrowband (say Ha) images. I have tried the Ha-OIII Extract Ha and it seems to work great. Some think that if you dither that a Bayer Drizzle integration works good too. It ends up with more detail and more noise.
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Not exactly sure what the Ha-OIII extract Ha does but is it preferable? I assume that it would also work for SII data given they both are in the red end of the spectrum?
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Any thoughts appreciated!
So for my understanding; you have the Ha data separate already in the beginning right? I use narrow band Ha, OIII, etc separately and combine them later in the tools menu.
No Vincent. I am taking Ha data through a one shot color camera with a Ha filter. Mabula has an algorithm in the RAW/FITS - Bayer CFA called Ha-OIII Extract Ha which does a nice job of extracting just the Ha data from OSC data.
Some say that if you integrate using the Bayer Drizzle method and extract the Ha data (I assume from the red channel) you will get sharper Ha data at the expense of more noise.
So just wondering if Mabula thinks one is better than the other.
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Thx.
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I must admit I didn't even know about that option, 😬 , I don't see many people with such a setup usually so never had to look into it. What I do know about my DSLR and taking Ha with that, is that the option to extract Ha directly in that step is the best way, both for the signal and noise. So I expect that to be the case for the Ha in your case as well. If you try both cases, you might be able to tell from the data in the SNR/Noise column if there is a difference.
