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! I'm here for the first time.
Usually I work in PixInsight. But there are reasons to try APP. Now I am working on a large mosaic of 55 panels. I have 55 LRGB well star pre-aligned master light panels (see example attached) with a black background outside the panel borders. A GradientMergeMosaic process in PI produces poor results. Is there a feature in the APP that will allow me to merge such a pre-aligned panels?
I ask the question becaus
 e in the tutorial materials on APP I see complex way Alignment + Merge. I did not find any materials for merging pre-aligned panels.
Is the black border also part of the image? I don't think that would work. You can easily test APP itself for the mosaic, but I'd suggest to use the created panels from PI in APP (so just the integrated panels and not the above ones) and set it up for a mosaic like so:
1. Increase the stars target to 1000 in tab 3 at least.
2. Tab 4, scale start to 5, scale stop to 10, switch off "same camera and optics"
3. Mosaic registration mode
4. If you have all info on your setup you can opt for a calibrated projective, this can speed up the mosaic creation
5. Tab 5, normalize to advanced
6. LNC on as well as MBB, you can opt to switch off LNC for just the test as that can take a long time
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Is the black border also part of the image?
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Yes, because these panels are already registered in the size of the overall mosaic
@stasv Do you still have the 55 panels that you registered in PixInsight? With those you can create a mosaic in APP, not with the ones containing the black borders you got after registering them in PI.
