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
I'm new to APP and need some help.
I have an old data from OSC camera / DualBand filter Ha-Oiii and I want to extract only Ha signal and mix it with my new data from mono camera with Ha signal.
The problem is that I don't know how to extract Ha signal from OSC and have all subs! NOT integrate them to master!
So I want all my 100 x 600s subs extracted with Ha signal (not integrated!)
How should I do it? step by step
The easiest way would just be to split it into R, G and B channels, and then just use the Red Channel, since Ha only exists in the Red Channel, and OIII in Blue/Green, it's the most easiest way to work with just the Ha Data. That's how I used to do it with my L-Extreme filter when I used to have an OSC
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Simon
I recommend a different path than Simon, because I think it actually is better.
load your old OSC frames with the calibration files/masters that you have for them, in 0) Raw/Fits set the Ha-O3 extract Ha algorithm.
Then in 2) calibrate, save them calibrated. The files that are created then are the fully calibrated monochrome files with your Ha data from the OSC camera.
These files can then be loaded together as lights with your new data from the mono camera.
Please let me know if this helps.
Mabula
Mabula's way is far better, I had no experience of the Extraction algorithms as I had never used them, and when I had my OSC those algorithms did not exist
