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 took shorter single frame exposures of Neowise but can see that the total time widened the lead of the comet in integration. Â I would like to only use half the data in my stack up.
Is there a method that I could use that would remove the frames I don't want so I could re-integrate the data that I want to keep?
Would this be as simple as deleting the existing integration image, unchecking the boxes of the lights that I don't want and re-integrating the frames I want to keep or would there be other steps involved?
No, that would be the way to do that indeed. You might also want to just clear the list and reload the data with the frames you want.
Vincent: Â Thank you, there are times when I end up with some undesirable frames in the stack up.
1 question associated with your reply. Â When you suggest clearing out all the frames out and reloading only the data that is needed does that require the saving of calibrated frames?
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No, what I mean there is simply that if you know which frames can be removed, that you just load in the good ones straight away for instance. But it may be easier to do it the way you want.
