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.
It used to work fine, but lately my flats don't do anything.
Some screenshots:
.
The first image is the linear, the second is calibrated. Clearly, all dust bunnies remain firmly in place. I have used default settings in the calibrate tab. Where do I start to debug this?
Hi Petra @petelaa,
That's looks a bit odd indeed ;-(, this is on APP 1.059 ?
I am working an a very big upgrade of APP's calibration engine for it's next release.
It would be most usefull if I could have a look at your data for testing purposes? I would only need a a couple of lights, bias and flats.
If okay, send them to support@astropixelprocessor.com using wetransfer.com.
Are the flats, lights and bias all the same ISO ?
Kind regards,
Mabula
lights and bias iso 1600, flats iso 100, BPM don't know. But this used to be no problem at all. Shall I send 5 of each to you?
Not sure if I use 1.058 or 1.059, will look that up when I send you the files, tomorrow .
Great @petelaa 😉 thank you.
The BPM doesn't matter.
If the flats are ISO 100 , APP (version 1.059 and lower) needs an ISO 100 masterbias as well for the flats. ( In APP 1.060, this requirement will be removed though.. )
So currently, without a ISO100 masterbias, the bias signal and pedestal/offset won't be subtracted from the flats and this is needed for flat-field calibration.
So for now, shoot some ISO100 bias and create a masterbias, then create a new masterflat where this masterbias is loaded next to the flats. Then the masterflat should work.
Cheers,
Mabula
It worked, thanks. I won't be sending you the files now.
Little bit of feedback though: if APP is not applying the flats, then why (see first screenshot opening post) does it label the light with an 'F'?
Thanks, glad it worked now 😉
Yes, good point, it should have applied the flats though, but since the masterflat didn't have the bias pedestal/offset subtracted, it looked like nothing was happening. ( If the exposure of the flats was very short then this could be the case.)
I'll make sure that in APP 1.060 things like this won't happen again though 😉
Mabula
