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 took some frames and also took flat frames with telescope still on the pier (so I do not move camera). After the stack the flats get applied in this weird way
Latest stable version of APP
I am posting screenshots
typical flat frame via NINA Flatwizard
Typical darkflat. I will upload the frames on upload server too, but wondering whats going on?
My lights typically do not have the severe vignetting the flat shows!
I am using a white sheet over telescope pointed to the sky. Wondering if I should go back to using my mac screen as before.
Camera QHY268C
Extended fullwell mode
Gain 0 offset 50
ViXen R200 newt with vixen coma corrector
I am traveing, so did not take darks and bias frames. Wondering if that could be the issue?
This topic was modified 4 years ago by Tanveer Singh
@tsk1979 Why is that upload.astropixelprocessor.com URL in that otherwise empty comment?
The unstretched flat looks good to me.
In order to perform correct flat calibration, APP requires flats and either dark flats or bias. So please make sure you use those. Note that the temperature, exposure time, gain and offset of the dark flats need to match those of the flats. If the exposure time doesn't, APP requires bias frames as well of the same temperature, gain and offset as the flats.
