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.
I took Darks, Flats, DarkFlats and Bias frames yesterday, and loaded them up and ran calibration against them, following the workflow in the videos here. Â Darks, DarkFlat and Bias all resulted in Masters that looked as one would expect, a smoothed version of the subs.Â
However, the Master Flat was basically black, even with various stretching in APP or other viewers. Â I redid all the flat subs again tonight, very carefully (wizard in Nina). Â They all look as one would expect, dull grey with some vignetting at the corners. Â Calibrated in APP, and the result is all black again! Â Hovering over the image in the viewer, appears RGB values are all 01638.
Any ideas?? Thanks!
-David
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From the screenshot I can see you took the flats at 0.15 seconds, at least that is something you want to bring up to 1-2 seconds. How does a single flat look like and what are your gain and offset values?
I did find my problem, I accidentally created my DarkFlats with the same pictures... hence when calibrated they normalized to nothing!
Excellent, that is good to know! 🙂
