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
January 24, 2022 23:21
I've looked around for answers but not sure they're specific to my questions!
I'd like to create a BPM as best I can, but I'm unclear on several aspects.
Here we go:
- Can I use any flats and darks? Or does it have to be specific to a project? If not specific, then is it better if I include a mix of calibration files from different projects?
- Do I have to use darks, or can I use a bias instead?
- Is it better to use as many calibration files as possible?
- Can a BPM then be reused across all projects?
Thanks, Brendan
January 25, 2022 17:57
- You can use any flats and darks, but if you want to make a really good BPM a good idea would be to do this separately. With a longer exposed dark, no cooling etc. so you can produce the noisiest noise the sensor can make. 🙂
- You do need a dark as a BPM is detecting hot- and cold-pixels
- It's fine to use 1 dark, but make it a noisy one
- A BPM can be used for the same camera for a long time yes, it's not destructive to your data. I'd day up to a year.
BrendanC reacted
Topic starter
January 25, 2022 21:23
And what's what we call brilliant moderation!
Thank you Vincent, this is perfect. Exactly what I needed. 🙂
January 25, 2022 21:41
Thank you Brendan, that's appreciated! Hope it works. 🙂
