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 default droplet size? Am I correct in thinking 1.0 droplet and 1.0 scale would be a straight stack (no change in size)? What happens if I change the droplet, but use "interpolate"?
Also, I seem to be getting some errors with the new version, although it could be my data. Attached is a screenshot of one error. Another: I had the droplet and size set to 1.0 and the output was larger than the program could handle (said it would downsize by .008%, then ran out of memory). The subs came from a Canon 450d.
More of an FYI: I tried using the background calibration on a mono image, got the understandable notice that it only works on color, but the program then locked up.
Ah yes, this will be improved upon in a later version, but normalization errors usually pop up when you try to have mono and color data processed in 1 go. Normalization is not possible between 3-channel and 1-channel data, but we want this not to result in a generic error, so that will become easier.
As for the droplet size, I have too little knowledge to assist there. I’ll tag Mabula if he has time for that one: @mabula-admin
Ah yes, this will be improved upon in a later version, but normalization errors usually pop up when you try to have mono and color data processed in 1 go. Normalization is not possible between 3-channel and 1-channel data, but we want this not to result in a generic error, so that will become easier.
As for the droplet size, I have too little knowledge to assist there. I’ll tag Mabula if he has time for that one: @mabula-admin
Thank you for the reply! Appreciate the info.
