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.
Hi guys
Playing with the free trial and having some issues. I've attached a screen dump of a stack I did (ten lights only) and as you can see there is horrendous clipping in all 3 channels caused by the gradient bottom left and bottom right. This level of gradient isn't apparent in the individual subs, and a stack in DSS doesn't produce any clipping. I did select "neutralize background" during normalisation hoping it would fix it as the first stack I did, using 50 lights, produced clipping without neutralizing the background (although only in one channel).
Any ideas on how to fix this?
Thanks
Doug
From what I'm seeing it doesn't look like there is a lot of clipping to be honest, I do see a lot of light pollution. You can try the Light Pollution tool in the "tools" (9) tab, select 5 boxes outside of the milky-way, click "Calculate" and then see what you get.
Cheers Vincent. Moved on a bit since I posted that - now using the tools menu. Getting much better results now 😊Â
That's excellent, if you have any other questions, just go ahead. 🙂
