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.
I'm wondering if I've missed a setting or processing step because when I try to open Light Pollution Correction I just get a blank white image.
System: Mac OS Catalina running APP 1.082 (same issue when trying a previous version)
Data: 144 light subs with usual calibration files over 3 sessions in HSO.
After integration (no problems) I combine the 3 channels into a colour hubble palette image and save the result. This works normally. The resultant file is 980MB.
When I then attempt LPC, the module starts, states it's neutralizing the background and then pops up a blank white image. This is the largest image I've generated and perhaps it is too big for the processing module? I've not run into this with other integrations that generate 750MB files however. I can open each uncombined channel result (327 MB) separately in the module with no problem - tough to see the gradients this way though.
Any advice much appreciated. Thank you.
James
It's marked as solved, is it indeed and could you tell what the solution was?
Of course:
In one of the three imaging sessions the OTA got rotated a little. APP had no problem with the integration but the borders were obviously mal-aligned for the "rotated" session. When entering the LPC module, the DPP auto stretch saw a fair bit of absolute black around the edges and I think the auto stretch drove the data to pure white. I discovered this by fiddling with the controls manually.
I went back and cropped the image to a perfect rectangle and everything worked perfectly! I guess there's a reason you put the crop tool above the LPC tool in the list 😉
Cheers
Ah, ok. 😉 Thanks for letting us know. I do think there might be a data issue though as there shouldn’t be regions that are completely black..
