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,
I am a bit confused which option to choose in the "combine RGB" tool:
- I stacked / integrated my OSC images taken with a L-eXtreme Dual BP filter
- ...extracted Ha and OIII (Ha-OIII extract Ha and Ha-OIII extract OIII).
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1. which option to choose (if it matters at all....):
default? or:
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2. I can load the Ha and OIII but I cannot load the RGB as RGB, there is no such option, only R or G or B
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thanks!
Peter
@peter-s For the RGB image, you need to split that into the separate R, G and B channels. To do so, load the image as a light and then go to tab 2. At the bottom of tab 2 enable "split channels". Then click the "SAVA (calibrated) Light frames" button.
To combine the R, G, B, Ha and OIII channels you can use the RGBHOO formula.
ah okay,
dank u zeer!
Peter
...sorry but a new problem:
After splitting the integration (32 bit float.) into R/G/B I get an error message when combining with the extracted Ha and OIII data:
"the images are not compatible"
- they all should be 32 bit float. (I checked "create 32 bit masters" at 2. and extracted the Ha and OIII from the Master L = integration)
- but they do differ in dimensions:
any idea?
Peter
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@peter-s Sorry, I forgot to mention that. You will need to load the R, G, B, Ha and OIII files as lights and then do analyze stars and register. That way, APP will align them using the stars in the frames and make sure that all have the same dimensions. I usually also do normalize before I combine the files.
okay - I thought the extracted Ha / OIII would automatically be aligned with the "Original"
but sounds logic 🙂
Peter
