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 All,
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At the end of this summer i did a try on m27 with my Asi 071mc-c.
I've combined 233 min of RGB data and 67 Min. of h-alpha data.
First foto only RGB data
Second foto the Ha with RGB.
Clear skys
Greetings Jan-Willem
Excellent images Jan-Willem 😉
Very nice signal for those integration times.
How did you combine the Ha data with the RGB data? Is it mixed with the red channel?
Or did you add it as luminance for instance as well?
Kind regards,
Mabula
Hi Mabula,Â
Thanx for the positive response, I`m still learning.Â
I did use your combine tool. The h-alpha wasn't very good data but I did want to use it for practice. I did combine te ha data only with the red channel. Both for the same amount so I did set both at 100%.
Should I also need to combine the ha data as a luminance channel? In stent of the red data?
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Kind regards,
Jan-WillemÂ
Hi Jan-Willem,
Combining the H-alpha with the Red channel is fine, you would make an RHaGB composite then.
Since the H-alpha signal is usually much weaker than the broadband red signal, it will help if you play with the multipliers for both Ha and Red.
Mixing can be done by setting them both at 100%, like you did, the mix will be 50-50 then.
The Red multiplier can be set a bit higher, like x1.5-x2 instead of x1. And for H-alpha, you will usually need to increase this to x3-x6 . That should make the H-alpha signal stand out more. Just play with these multipliers and you should see clear differences in the composite.
Let me know if this helps 😉
Mabula
Hi Mabula,Â
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Thanx for all the advice.
Next time I will try to increase multiplier for the Ha data a bit more this time I set it to 1.6 for red and around 4 for Ha. (I do think when the Ha data was a bit better I could make more of it).
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I wish you good holidays and a big complement for a you're work on APP.
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Cheers Jan-Willem
Thanks a lot Jan-Willem, you're welcome 😉
Happy holidays !
Cheers,
Mabula
