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 used an optolong enhance filter on my 183mc, split the Ha and Oiii channels using the debayer algorithms. My question is can I take these two channel s and synthesize a green channel to do some Hubble pallet work?
I have options for that in PS, but I would have to convert them from fits to maybe a tiff to use that. I heard PI has an option for it but couldn't figure it out in APP.Â
I guess maybe a better question is how to do a SHO image when you only have Ha and Oiii.Â
I have some data here (in the drive link) if anyone wants to play with it. It is made up of 3 minute images with a 183mc pro and Lenhance filter. I took the images and split the channels in the debayer settings.  So far this is the best I have managed and I fumbled around arriving at this result.Â
https://drive.google.com/open?id=1G3lFbjLbezWXrzkk-GWstmHdL8RGRsdL
Hi Strandon,
So with just Ha and OIII I'm not 100% sure, but your colors you ended up with look similar to where Mabula started out with in this tutorial. It already skips to the part where he goes about changing the colors, hope that helps! (basically with/without star color calibration you get the biggest difference as a starting point for it, and ofcourse how you assign the colors). For more aggressive changes I think the other packages are still in an advantage tool-wise.
