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.
This was one of the first images I took with my ASI 183MMPro Cam, re-processed with APP today. With the new integrate-all function a luminance channel was created from RGB data and this significantly lowered the noise in the end result.
35x RGB à 15sec @ Gain 111, 8" GSO f/4 Newton
Hi @schurig,
That's a beauty 😉
Happy to hear that the arteficial luminance from the R,G,B channels combined adds to the result as expected 😉
So this is only 35 x 3 x 15 seconds = 1575 seconds, less than 30 minutes?
How is calibration working with your asi183mm in APP? I got reports from 2 other users that they have residual amp glow after dark frame subtraction and will investigate this soon.
Thanks for sharing 😉
Mabula
Hi,
Thank you very much.
Yes, the ASI 183 is very sensitive, so you can get good results with compareably short exposure times.
I too had problems with the residual amp glow, but maybe that came from the old way of subtracting dark and bias in the previous versions of APP? I'll keep an eye on it, at least with the orionnebula image I haven't seen it, but the object is very bright itself, so not good example to test it. I have more data to be processed on my HDD... we'll see.
Stephan
Hi Stephan @schurig,
Do let me know, if you encounter problems, do send me the data so I can test. Today I will start testing using data of 2 other asi183 users 😉
Mabula
