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.
Hello.
Please tell me about the settings for mosaic.
The image is the result of a 2x3 mosaic.
The image of Telescopius is the range of the mosaic.
I have little knowledge about the mosaic of APP.
"calibrated projective options" in Tab 4) is the initial value, but if I need a change,
I want to know how to use it.
Also, how should the later adjustment be done?
Each panel was adjusted by "remove light pollution". Is it necessary to adjust again?
Thank you in advance.
momo
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Calibrated projective needs some information about your setup, so you fill in what is asked there. However, this only makes things go a bit faster, you can use the regular setting. Most important for a mosaic:
- Stars count target: about 2000 stars
- Dynamic distortion correction: on (off when you see artefacts in the result)
- Same camera and optics: off
- Scale start: 5. scale stop: 10 (depends on the panel overlap)
- Registration mode: mosaic
- Normalization mode: advanced
- LNC: on, MBB: 5-10% (depending on the overlap %)
Removing light pollution is in most cases required after making the mosaic, because the panels will still all have variations in the background. The panels can look great after LP correction, but still vary in between.
@vincent-modÂ
At first, it seemed that there was no strange place, but when it was enlarged,
it was found that the star was partially deformed. How can I fix it?
Thank you.
momo
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Like I mentioned in the steps list, if you get artefacts it may be required to switch off dynamic distortion correction.
@vincent-modÂ
I didn't have time to use the APP for a while, but today I was able to find the cause of this phenomenon. Vincent's advice gave me a very good hint.
After doing some trials, I found out that two panels had problems.
I changed the Light frame because they were a little out of focus. I will tell you that the problem has been solved.
Thank you Vincent.
I played with the settings related to the mosaic, but how should I choose "distotion margin" in 4) Register?
One magazine states that 0.05 is the recommended value.
What is the effect when this number grows? What kind of phenomenon will occur if this number is excessive or under small?
I got good results at 0.05, but I want to know in advance to use other numbers.
Thank you very much
