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.
This may already be in the works but the file save dialog in 1.83b2 could use an enhancement. Every time the dialog displays, the file options selected by default are always the first item.
I think it would be more helpful to have it be a bit smarter in context. For example, after a crop it offers FIT at 16 bit integer. It could offer 32 bit float by default. And when saving a stretched file it could default 16 bit tiff instead of 8 bit.Â
@turtlecat1000 Thanks! I have passed on your tips to Mabula.
This may already be in the works but the file save dialog in 1.83b2 could use an enhancement. Every time the dialog displays, the file options selected by default are always the first item.
I think it would be more helpful to have it be a bit smarter in context. For example, after a crop it offers FIT at 16 bit integer. It could offer 32 bit float by default. And when saving a stretched file it could default 16 bit tiff instead of 8 bit.Â
Hi @turtlecat1000,
Thank you very much for your thoughts on this.
I have already done it for the 1.083-beta3 and stable release 😉 By default, saving will be in 32bits floats which you always want to do while the data is still not stretched indeed.
I will add your suggestion that when you want to save the data stretched with the save button below the histogram, 16bits TIFF is proposed which is the most logical I think for most users that might want to export the data to Photoshop for instance.
Mabula
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