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.
Dear Mabula/Vincent,
To describe the problem:
I load a raw frame and inspect it in the image viewer using the zoom functionality.
I then click on l-calibrated in the image viewer.
I then see the abbreviation CA appear behind the raw file which is somewhat strange because there are no calibration masterframes active at this moment. Going back to linear viewing does not make the CA go away.
Even more strange is that the raw file is hurt due to the enabling of cosmetic correction in the calibrate tab. Especially the hot and cold column correction options with the default value of 8 are the problem. Lowering this value significantly increases the problem, setting the default value to only 8.1 solves the problem!
First, is it normal that cosmetic correction is already applied once you tick the options in the calibrate tab and look at them in the l-calibration mode (hot pixels correction seems to work OK by the way)?
Second, shouldn't there be a warning to carefully inspect the raw files using l-calibration mode to check if the raw files will be hurt by activating cosmetic correction? This is highly important because all the following steps have this artifact included (also the final integration result). Besides, the issue seems to concentrate on the sky target itself which makes it even more disturbing.
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Best, Ruud
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