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.
There is a first time for everything, it seems. I have never received this kind of result for a stack. 80 out of 100. APP beta. Iris nebula was the target. I will keep it for the abstract art category of my catalogue. :>)
I will start over but wonder what might have been the primary influence that created this result?
Thanks.
Oeh that is very nice... art wise. 😉 I think you're using dynamic distortion on data that doesn't need it. Could you try switching that off?
Your advice was correct. Not using dynamic distortion on the data was the best solution.
I had three sessions. Each stack came out nicely. But, when all three were added together the result may be seen in the attachment. The center area is quite destroyed. What should I change to avoid this result when producing the 'all sessions' stack?
Thanks.
Mmm, that looks like an artefact, how did you save the tiff (what parameter)? And does it look like that in APP as well, as a fits file?
Thanks for your reply. The fits file for the 3 combined sessions is too large at 210MB. Do you want to see it? How do I do the large file transfer?
I think I see the issue above, but that's the tiff right? How does it look like before you export it as a tiff, what does the image look like in APP?
