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.
I have a set of lights where the quality score varies significantly from one to the next. Is it possible for me to set a quality score threshhold to be used during integration where lights falling below the threshhold will not be included in the stack? If not, is there some other parameter (possibly kappa) that could be set to achieve effectively the same results as if lights with a low quality had had been ignored?
JeanÂ
You can use the slider in the integrate tab to stack a % of subs based on the score. That would likely be what you're looking for.
Thanks for the reply. But just to be clear: If the top quality score is 100 and I set the slider to 80%, that means all lights with a score of 80 or better will be used, even that means only, say, 60% of the lights will be stacked. Do I have that right?
Jean
It means that you'll be stacking 80% of all frames, where 20% will have a lower quality value than those 80%. You can see how many frames will not be included under the slider.
OK. Thanks.
Jean
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