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 guys/girls,
i'm working on my first mosaic. Well i'm about to finish the 1st of 4 panels, the other 3 I will make when weather clears up again. But how far do I process the mosaic?Â
My general plan is to capture and extract HA with a dual band filter (ASI294 mc pro with Optolong L-eNhance filer) and make a 4 panel mosaic in HA. Then i'm making an OSC RGB mosaic of the same target and separate R,G and B. Finally I will combine the 4 (r,g,b and HA) complete mosaics with the RGB combine tool.
My first question is, would it be better to stitch the RGB mosaic first and then, when it is complete, separate the R,G and B channel. Or is it better to split the R,G and B per panel and stitch them afterwards (so run the mosaic option in APP 3 times)?
Second, how far do I post process a panel before running the mosaic through APP? Do I, after integration of the first panel, take away any stack artefacts and/or light pollution? So I get the cleanest result when stitching all the other panels? Or do I leave it as the original integration and do the lightpollution removal at the complete end after stitching all the panels?Â
I couldn't find the answers to this on the forum and in the tutorials (since the tutorials are already awesome clean data).
Cheers,
MichelÂ
On your first question, I would say to make the panels first by processing the RGB and NB fully (make them as nice and corrected as possible), add the NB to the R, G, B, do some processing again to make it nice and save the panel as RGB and do this for each panel. Then run the mosaic and post process again in a similar way. There are multiple ways to approach this though like you mentioned. But making the data as nice as possible at each step is, I think, a good idea. It will make the data cleaner for the next step.
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