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.
I have some OSC data with minor chromatic aberration as well as data taken with a dual band Ha-OIII filter and am wondering what the optimal way to process is. Â It seems like two possible options:
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1) use Ha extract and OIII extract plus align and save Ha, OIII, and CA corrected RGB files and then register, integrate those
2) use Ha extract, OIII extract, and separate R G and B files and then register and integrate those
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are these equivalent or does the align process do some smart CA correction that would be lost in going to channel separated data?
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Thanks
Mm, good question, the align function works best with RGB data as far as I know, but I'll ask Mabula for this one.. I think you can align the RGB and then add the mono later, but not sure if that then shows it again.
I have some OSC data with minor chromatic aberration as well as data taken with a dual band Ha-OIII filter and am wondering what the optimal way to process is. Â It seems like two possible options:
Â
1) use Ha extract and OIII extract plus align and save Ha, OIII, and CA corrected RGB files and then register, integrate those
2) use Ha extract, OIII extract, and separate R G and B files and then register and integrate those
Â
are these equivalent or does the align process do some smart CA correction that would be lost in going to channel separated data?
Â
Thanks
Hi Thomas @gordoabc,
Very good question, workflow 1) is the best option for sure. The Align Channels option in 2)Calirbate uses a special registration model (4th degree polynomials) that can deal with very complex chromatic aberrations. The normal registration model with distortion correction enabled can only correct less sever chromatic aberrations, because that uses different mathematical assumptions.
Mabula
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