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.
Hey friends,
I have L-extreme data and L-Pro data. The L-extreme data has 480 and 1200 sec subexposures for the narrowband nebula data, and the L-Pro has 60 sec subexposures for the stars. I'd like to stack the both filters as OSC data, using the HA-OIII Color option for the narrowband data, and the Adaptive Airy Disc option for the L-Pro data.
Here's what seems to be the easiest way:
Load all of my data into APP (so it can pick the best reference frame of all of my data). Select HA-OIII Color algorithm. Use "multi-session" to differentiate the L-extreme 480sec and 1200sec subs and their respective darks, and make sure only the L-extreme subs are selected in the bottom half of the screen. Then integrate the L-extreme data.
Step two would be to uncheck the L-extreme data, and check the L-Pro data, change the algorithm to Adaptive Airy Disc, and reintegrate.
I know this seems a bit like a strange workflow, but it's the simplest way that I can think of doing this, as changing from HA-OIII to Adaptive Airy Disc for two different stacks makes it a little complicated.
Is there a better way that I should go about this?
Thanks in advance!
@jeffreyhorne Hi Jeffrey. It seems to me that you are doing it exactly as you should. There is no simpler way to do this.
Next you can do is load the two RGB integration results as lights (don't load any calibration files) and go to tab 4 to register them. Then you can save the registered frames to disk. Next you can load the two registered files again as lights and go to tab 2 (again don't load any calibration files) and click the calibrate button. Then still in tab 2 you can tick the "split channels" tick box and then click the SAVE (calibrated) Light frames button. That will give you 6 files: one of R, G and B for each RGB file. you can then use combine RGB in the tools tab to combine the 6 R, G and B files into one RGB file.
Or if you have another workflow with external tools then you can use that as well of course.
