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.
Topic starter
July 7, 2020 01:00
New to APP and trying it out. I shoot with a nikon D5300. If I comprehend correctly, APP expect flats with
the same exposure time as bias. I always thought that bias was suppose To be the fastest exposure possible
and then flats were to get ADU at about 50%. I use the t shirt and tablet for lighting. I suppose I could
slow the bias as that may be easier than trying to get the light to correct intensity which right now I am
already maxed out on the intensity side. Not sure if slowing bias downis smart although we are talking the
difference of 10 milliseconds to 120 ms which my flats currently are at.
Do you have any input?
This topic was modified 6 years ago 3 times by Phil Miholovich
July 7, 2020 10:07
It is a LONG thread, but maybe read this first?
HTH, Wouter
July 10, 2020 09:38
APP doesn’t require flats with the same exposure time as Bias. That would be rather odd as flats are usually taken around 0.5-1 seconds of exposure time. Dark flats you might mean, those are at the same time as flats.
