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 đŸ™‚
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 there, I have used APP for years now and came across a problem I never encountered before. I haven't changed any settings ( I use the default ones) but it seems that the registration process is failing. The master files are blurry, you see that the frames aren't correctly stacked. Strangely it's a very recent problem I came across when reprocessing old data ( with the matching calibration master frames). I tried stacking R,G,B separately after splitting the RGB channels but still the same. The single calibrated frames are ok, checked one by one. I can't recall whether I dithered but I suppose so. Have you any idea what could go wrong?
Cheers, Centaurus
Could you try the previous APP version, beta 38, and if the issue goes away then it’s to do with the new updated registration engine in the latest update causing the issue
I used the beta 28 release - the same one I used appr one week ago successfully processing a different object. It just hits me by surprise as I haven't updated or changed some setting.
Addendum: the problem arises with all data I try to stack, even the ones that were successfully stacked a short time ago.
I tried the beta 38version but the problem remains.
