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 image with the ASIAir Plus, which shows me the average ADU of each image directly after they've been taken. This is really helpful to me when deciding which subs to keep and which to trash, as sometimes it's hard to visually compare a perfectly clean sub to a sub that has some very thin cloud cover.
The problem is, the ASIAir only shows avg ADU value for the last sub that's been taken, and there's no way to save this information for later, other than monitoring the screen and writing it down after each sub is completed.
Is there a way to sort by avg ADU value in APP? This would save me a ton of time when sorting through my subs, and would help make sure that no subs make the cut that shouldn't cut it.
Thanks in advance for your help!
Jeff
I see this from another post:
"Adding to this, after APP has performed step 5, Normalize, you can sort the frames by sky background and create an analytical chart of the sky background. You can then easily identify the frames with clouds and discart those."
I think this is what I'm looking for. Does it matter what settings I use for normalization? I usually don't check "neutralize background". Does that matter?
Also, do I sort by "Background"?
Thanks!
Jeff
@jeffreyhorne Hi Jeff, in general you can leave all APP settings to their default values and APP will figure out what to do. Why would you disable "neutralize background"? And yes, sort by "Background".
@wvreeven the tooltip says that automatically neutralizing the background might remove some faint nebulosity, so I neutralize it manually using the light pollution tool.Â
Thanks!
Jeff
