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.
Hi Wouter/Vincent,
Recently I got some dark calibration problems on my LRGBHA data. Also after an update to the latest beta 13 version.Â
I used the same Temperature, Exposure time, Gain and Offset for my Lights and Darks. (-25, 180 sec, gain 130, offset 8)
For my Bias the same temperature, gain and offset (-25, 0.0001 sec, gain 130 offset 8)
My flats have the same gain and offset but a higher temperature of +11 degree.
I took 11 hours LRGBHA images of NGC 3184 with asi183 mm pro. I attached the red calibrated file.
Any suggestions?
For the flats with a higher temperature, you also need bias or darkflats with the same temperature especially if the difference is rather large. This is because the noise generated by the sensor changes. Also, I would advise to make bias frames with exposures of at least 0.6 seconds or so, quite a few sensors don't behave very nicely at the fastest speeds.
No complains about the flats. The problem is the dark calibration. Today I callibrated/integrated Lights of IC 342 of last week with the same darks I used for NGC 3184 an I did another attemps for NGC 3184 today.
The dark callibration of IC342 was perfect! but the dark calibration of NGC 3184 failed again. all same Temp. Exp. Gain and Offset
I enclosed the fitsheaders of the Lum files plus the dark.Â
Dick
Â
I did not use flats or bias in both sessions above.
I see indeed you have no correction of the amp-glow. Can you see if the file in the table overview, shows that the MasterDark is used for calibration? This is shown by a "MD" being added to the lights.
I think it's best if you can upload a small set of your data to me, so I can check what's going on. Just the set that is failing is fine, you can upload 10 lights, 20 darks.
Hi Vincent I did. Mabula asked me that just before you.Â
@vincent-mod. Yes there are BPM, MD, Darks, lights and a integration file in the table overvieuw.
Hi Dick,
So I have looked at the data you uploaded and the darks seems normal and do calibrate the amp-glow properly from each frame. The other light coming in in the upper left in the final integration is not in your darks and must be a new light pollution source.
