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.
@mabula-haverkamp-administrator
Hi Mabula,
I've been bussy with APP today, i made a stack of M8, M21 and M22. Then apply the remove light pollution tool, work great :)!!!
And after this i want to apply the star collor callibration, (a few months ago you dit help me with the settings for my type of cam. and the Idas LPS D1 filter), i used the same settings as i always use (normally it works great), but this time the star color don't seem to work correctly. Befor i use the calibration tool (see picture before) the stars are nice round and white (to white) but when i apply the tool the stars are also round but on the upperside right the are white and the down side lift the are blue, sort of half colored stars.
Am i doing something wrong?
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Kind regards,
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Jan-Willem Duijndam
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It's a bit difficult to see, but it almost looks like the blue stars are blue because the colors aren't aligned very nicely, could that be if you look closely? I seem to see it in general with all stars.
Hi Jan-Willem @jw_duijndamhetnet-nl & Vincent @vincent-mod
( I helped Jan-Willem by email to solve the issue, but I place the solution here for completeness 😉 )
The issue indeed, is mis-aligned of the stars, it looks like longitudinal chromatic aberration.
The solution is to:
- load the RGB data as a light frame
- Â in 2) Calibrate, enable "Align Channels"
- save the calibrated frame.
The Align Channels feature will correct all forms of chromatic aberration using a special registration model 😉
Cheers,
Mabula
Hi Mabula and Vincent,
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I did try align the channels and this resolve the mayority of te "shifting" for the rest i did set the blue-red slider a little less to the blue side (it was way to high to the blue side) an it seems a lot better.
Thanx to you both for the help, when te picture is finished i will share it on the forum :)!
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Cheers Jan-Willem
Awesome! Always great when things get resolved fast. 🙂
