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 Mabula,Â
I have a question about my picture's. In almost al my picture's in the backgroud (after the remove lightpollution tool) there are red "smears". So it looks like the backgroud isn't nice and smooth. When i see all the other picture's on the forum there all are nice and smooth and lack the red smears like my pictures.
Am i doing somthing wrong.
These are the steps i do,
Load all the lights, Master bias, Flats, BPM.
Then calibrate, there is a master flat created, then remove the flats so i keep only the master flat.
Then the most of the settings are like the are when i start up app.
Set i set LNC to 1the degree, 3 itterations.
Enable mbb at 5%.
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Can you help mee to get a smoother picture?
I use a ZWO asi 071 mc-pro,
A Skywatcher esprit 100ed (with flattener)
A Hutech idas lps D1 light polution filter,
And al this on a eq6 pro mount.
I live in a verry light polluted area, is this why i cant get more out of it?
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Kind regard, Jan-Willem
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Hi Jan-Willem ( @jw_duijndamhetnet-nl ),
I think this has to do with applying the "remove light pollution" tool.
There are some things you can do to have a better grip on how the tool performs, so when you have started the tool:
- over stretch the data, so stretch much more than you would do on your final image. This will not affect the result, but will help you see the gradients easier.
- Over saturate the colors (set SAT to 0,30-0,35) and lower the saturation Threshold slider to 0,05-0,10, this will cause the saturation to affect your sky background, which again, won't affect the result, but will let you see the gradients easier. This helps more than over stretching in my experience.
- Then after correction, the result should show you the flat and desired background.
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Let me know if this helps 😉
Mabula
Hi Mabula,
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Thanx for youre suggestion, i will try it and than let you know what te result will be.
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Kind gregard,
Jan-Willem
