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.
Despite creating a new BPM and masters for this imaging run, I cannot seem to get all the hot and cold pixels removed. How do I need to change the kappa values to remove more hot/cold pixels?
How many subs in your stack? I would sometimes still get hot pixels even after calibration so a few years ago, I started dithering all my subs and use Outligher Rejection with LN MAD Winsor clip with the default values to clean up the stray hot pixels. It works well.
Mike
Ahh, great to know. I have several hundred subs. I do dither, but had not used LN MAD Winsor clip. I’l try that.
With dithering, many should be removed already given the dither is big enough. Are your darks etc at the same temperature etc as the lights? For the BPM it's also nice to include a very long exposed dark. A mild sigma clipping would then be enough to get most if not all to be gone.
