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.
Hello all - I've purchased APP and I find it quite useful for simple single and multi-session work, gradient removal, Ha/OIII extraction etc. when all of the sessions are of a similar nature (e.g. they use the same filter). I may not know how to ask this question very well, so I will just state what I am trying to do and I'm looking for some clear direction (don't assume I know all of the inner workings of APP - I just basically take all of the defaults and let APP do it's thing and I hope it is correct).
I am using a Fuji camera with dual wavelength narrowband filter for the Ha signal generation and the same setup minus the filter for the "OSC" color information. This is for nebula processing.
I have two sessions of images collected with the duo-NB filter and I want to extract the Ha signal, which I know how to do. I also then want to process another (third) session of data that was acquired with no filter. I'd like to use the full color image from the third session and boost the red channel with Ha from the first two sessions. I know about the combine RGB tool, which I have used for Ha-OIII extract Ha/OIII type HOO re-combinations, but I don't know how to do what I am now trying to do. I'd like to try to do as much of the work in APP. I know that it is possible to simply process session 1 & 2 together and extract the Ha signal and then perform an Adaptive Airy Disc integration of the third session separately and then fiddle with the rotation in Photoshop and do channel manipulation and layer blending to get the result I am trying to achieve (if I can figure it out - ha!), however, I'd like to see how far I can use APP instead of leaning on Photoshop so much (I'm not a Photoshop expert either). Can someone explain to me without assuming I'm that I'm a world class APP user how to do this? Thanks! Â
Edit:Â Perhaps this is what I am trying to do:Â https://www.astropixelprocessor.com/community/postid/7610/
Yes you can follow that workflow indeed. I also think you can just load in the RGB in RGBCombine and it will be seperated in R, G and B. That's something I didn't try much, so that's from me remembering it used to work. 🙂 However, nowadays my workflow is more similar to what you found, in that way I can nicely correct all channels before combining, which gives a better starting position for further correction as well.
Thank you Vincent...
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