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.
Hi,
I just finished processing OIII and SII files from this nights session and I run into some problem.
I used Dark frames I gathered the previous night and after integration both the OIII and SII channel showed no data.
After a second try OIII still stayed dark and SII came out like this:
https://gyazo.com/238951ee2261febf010612fb566efe12
I had some OIII data from the previous night and once I added it APP seemed to process this data correctly but then ignored the data from the following session.
Multi Session processing is selected and I correctly assigned the frames to the sessions.
I didn't change anything in my imaging setup between the two sessions and never had a problem in previous runs, at first I thought it maybe didn't apply the dark frames but it seems like APP did do something to the light frames and I have no idea what could cause this.
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Edit:
After stacking only my light frames without any calibration frames I get an image, so definitely a problem with the calibration frames coming from another session.
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Ah crosses, I've seen that weird thing before a long time ago. So it only happens with your latest darks? If that's the case there might have been a setting wrong when you took those. Check offset etc.
I did shoot another batch of darks a day later and tried them.
Same problem.
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I'm at the point where I suspect there's a problem with at least some of my light frames. I did try to stack them with DSS but I get the same result so I'm pretty sure the problem has something to do with my data.
Once I'm able to get some new images I'll report back if I was able to get rid of this.
Yeah, unfortunately I can't remember what caused this specifically (which is why I write this kind of stuff down now 😉 ). If the issue remains I'd like to have a look at the data as well.
