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,
I´ve read several entries and explanations concerning LNC but still have the following question:
Is LNC performed twice when using an LNC setting other than "no LNC" and an LNC rejection filter? Or are the LNC settings for the LNC rejection filters? I believe not. So under normal circumstances it seems to make sense to leave the LNC setting at "no LNC" if an LNC rejection filter is used, right?
Best wishes,
Ulf
Good question, I think it's a good idea to use LNC anyway (correction), it's off by default as it increases memory use and slows down the process quite a bit, but it is effective to have. I'm actually not sure if these are completely separate, they appear to be in the way it's layed out, but I'll ask Mabula about this.
Vincent, I think your memory is failing you or your info outdated. When I hover my mouse over the "LNC degree" drop down it specifies that with data from one night LNC probably will have little effect and will be visually hard to see.
Still, Ulf has asked an interesting question.
Wouter
Thanks for the infos! Would be interesting to hear, what Mabula says.
Best wishes,
Ulf
Vincent, I think your memory is failing you or your info outdated.
As I've worked in science during my entire career, I'm very used to criticism and welcome it. I can make wrong assumptions, but I'm the first to double check those when that is pointed out and then thank the one for pointing it out. I'm sure you didn't mean the above in a bad way, but I'd like discussions here to be respectful.
When I hover my mouse over the "LNC degree" drop down it specifies that with data from one night LNC probably will have little effect and will be visually hard to see.
Still, Ulf has asked an interesting question.
Yes, on a single session it indeed won't make a big difference, if at all. I just check it anyway as it doesn't hurt either and may still correct some small variations. If your system is not the best, I would not do that for a single session indeed. Me personally, I rarely have data from just 1 night to stack so it's something I always do anyway.
Thanks for the infos! Would be interesting to hear, what Mabula says.
Best wishes,
Ulf
He should be coming back to you shortly. 🙂
@vindent-mod, sorry I didn't mean to offend you. I'll try to word my comments more carefully next time.
No worries Wouter, I figured as much and thank you. 🙂
