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 đŸ™‚
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 All
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I have an narrow band filter for HA / Oiii and the subs look fine but when processed as RGB all the colours change and its looks wrong. Nice but wrong
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With narrowband do I select RGB like i would for any LP filter?
Filter is the Antlia ALP-T
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Many Thanks
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Paul
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May have found the answer...just doing it now
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"@stephanhamel22 Hi! This is quite simple. Load your lights and calibration frames in tab 1. Then in tab 0 select the Ha - OIII extract Ha algorithm. Then go to tab 6 and click integrate. When done, return to tab 0 and select Ha - OIII extract OIII. Click yes when asked if you want to normalize again and in tab 6 click integrate once more. That’s all. "
Hi All
Sorry for the questions.
Once I've extracted the Ha and Oii how do I combine them in APP...?
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Many Thanks
Paul
Losing faith now
I sont see tab 9..never have...asumed it would be there when the process requires it
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I give up!!
Tab 9Â Â its called tools in the program...all other tabs have numbers so call it tools or add the number 9 to the tab
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Tried to follow the advice but what is said does not reflect the tool...i keep getting a B&W file when combining as its not clear how to load the two files
Help is non existant outside the forums
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Painful progress đŸ™‚
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Got a clour image from 6 subs
now to try all 100
Ha and OIII only will not produce a RGB image, the algorithm in the RGBCombine tool will then simply assing some OIII to G and B. That will give a kind of two-tone image which is normal, you only have 2 data channels. With narrowband you can assign them to RGB in any way you like with the formula in that tool. If you want to make a RGB "true-color" image with added narrowband data like in the tutorial you linked, you need RGB data as well.
