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'm using a 2600MC Pro camera and two different NB filters, one for Ha-OIII and another one for SII-OIII. I get from the post below:
https://www.astropixelprocessor.com/community/main-forum/sii-oiii-dualband-filter/
how to extract the SII (treat it like it's Ha in the "Algorithm" setting on Tab 0). For the OIII part of this filter, for Algorithm should I use "Oxygen III (OIII)" or "Ha-OIII extract OIII"? Arguing by analogy from the above post, I suspect the latter, but I wanted to check before diving too deeply into my stacking project for NGC7000-IC5070.
Also, in an upcoming release of APP, are there plans to include a new Algorithm specifically to extract SII and OIII from a NB filter in a similar fashion as a Ha and OIII filter?
Thanks as always!
-Kevin
Curious if anyone has thoughts on the above. Thanks!
Hi Jon.
See here: https://www.astropixelprocessor.com/community/tutorials-workflows/askar-colour-magic-filter-c1-c2-stacking-flow/#post-30580
and here: https://www.astropixelprocessor.com/community/tutorials-workflows/ha-oiii-integration-which-algorithm-in-0raw-fits/#post-32888
I have the Altair 6nm Combo, and following exactly this, I successfully generate:
- Ha and OIIIa from my Ha-OIII Filter
- SII and OIIIb from my SII-OIII Filter.
I then register OIIIa and OIIIb to OIII and have my 3 Narrowband FITS.Â
Stacking is really good (best) in APP - for all other I use PixInsight.
You need to carefully (re)name, and assign the right flats, darks and bias.
Thanks, Michael!
