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.
Could i please get some help with the attached file. It is a stack of M42 luminance data. Once the stack had finished I got a very weird pattern in the background. I realised I had too many luminance frames so I cut it back to 40frames from 125 to see if this would help with the background pattern. I tweaked some of the setting and went through the whole process again from star analyse to integration. The attached image is the result. Has anyone see this before and have any suggestions on what I could have done wrong.
Thanks,
Simon.
Hi Simon,
Welcome to the forum 😉 !
Luckily, you didn't broke it I think. But it is a bug that I need to solve.
This will happen if you enable optical distortion correction in 4) register in a case were you most likely don't need it.
So my advice for now, is to register your images with dynamic distortion correction disabled.
I would assume that you didn't dither between your exposures or only very minor dithering and that all of your frames have nearly identical field of views?
Let me know if things work out fine without dynamical distortion correction 😉
