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.
What is the correct process if I have a RGB mosaic and want to add Ha to it and make sure they are placed correctly.
Basically: Can I set a reference from the original picture and make APP align the new pictures to it?
@syberand Hi Anders. Create the two individual mosaics (so one for RGB and one for Ha). Then load both mosaics as lights and go to tab 4 to register them against one another. Once done, save the registered frames in tab 4 and use those to combine them. If you want to use APP for combining them in Tools -> Combine RGB, you first need to split the RGB mosaic after registering against the Ha mosaic in tab 2. The reason is that in Combine RGB you need to load frames for the individual color channels and you cannot load RGB images. See the workflow that I redirected you originally to in your previous post.
thank you
I am having trouble with OSC color mosaics.  The process I am using with the mosaics as seen on some youtubes seem to be correct.  When I do a single color with a B&W camera the blending is great. However, with the ZWO 071 camera I am using on a 2-image mosaic the blending is not good. This could be fixed in Photoshop with the blending and lines seen.  What area do I need to adjust more or less to get the blend more transparent in the mosaic? I am guessing parameters need adjusting a bit
Are you using LNC and MBB?
