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 believe this has something to do with Normalization. I can stack the individual sub-frames separately successfully, and the O3 and S2 channels mosaic stack normally. But regardless of what I try in settings the Ha channel will not stack properly. This image is with LNC disabled. The top frame seems to work normally, but the bottom does not. With LNC activated both frames are almost fully washed out as is the bottom frame of this one.
I've stacked many dozens of images and several mosaics and have never seen this before.
Any suggestions as to what is going on here?
Thanks,
Eric
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That's a new one, can you see a normal signal when that lower panel is stacked on its own?
@vincent-mod
Yes, I can stack each of these HA frames individually and they look normal. It is only when I try to run it as a mosaic does this happen. When I have time I'm going to stack the top and bottom 3 channels separately then attempt to register, normalize and integrate them as two separate images. Can that work?
You should be able to load them all in (each panel separately), register and integrate all those as multiple channels. Then combine them into what you want for panel 1 (rgb combine). Do the same for the bottom and then load those integrated panels as new lights and make a mosaic... that might be interesting to try.
@vincent-mod
The separate integrations of each mosaic section and then integrating them as a second step worked famously! I hope that this was just some weird event as a result of settings or the data since it took a bit more time, but in any case the results are spectacular! Thanks for the help.
I can't upload images to the forum right now, but here is the link to my Astrobin.
Superb! Yeah it is still a bit weird and I don't think that should happen, so could be some weird step somewhere. There are however more ways to Rome. Very nice result!
