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've been using APP last years using mono camera shots (asi1600mm & asi294mm) with great success. Lately I changed to a color cam (omegon vetec 571c) but my integration results are a failure. Below some examples:
The first one is a single shot, the second is the integrated one of 40 shots. I use darks, flats and darkflats. Settings on APP as usual with auto options prefered. Same results in an other try:
Any idea what has gone wrong?
Could you explain what exactly you describe as a failure? The first lighter ones seem to be stretched a bit more and don't have flats applied. The other ones are stretched less (and thus darker), but seem to lack in color. Can you tell me what your setup is exactly and what settings you used during capture? What workflow do you have for the calibration data?
Hi Vincent. Failure I mean the results are green where they should not be. As a result I cannot bring colors properly in natural. Double cluster set is with skymax127 & vetec571c, 90sec gain100 -10oC. Andromeda set is with esprit100 & vetec571c, I think 300sec gain100 -10oC. The first ones are stretched & uncalibrated from asistudio viewer. The stacked are only in 10% stretch setting.Â
I'm suspecting either an issue with calibration data or the green may be normal as an OSC has more green pixels on the sensor. Did you check what happens when you go through color correction?
Vincent I switched back APP version from 1.083 to 1.077 and all has come to normal. Below a stacked double cluster. Comparing to above stacked the difference is obvious. There must be something with the last verion I cannot figure out.
Might be, would you mind sharing your data including calibration data? That would allow us to investigate, thanks for the update:
So analyzing your data now. I do notice that you're shooting at 90s only and looking at the histogram data is lost in the background. When I look at your flats, they don't seem right, the histogram is almost absent when switching off stretching (unstretched it should be at around 50-70% of your dynamic range). So these definitely need some work as having wrong flats will impact your data in the end. I'm also not able to correct the star colors properly in the end, which may mean that the respons of the sensor is not giving a proper broadband signal, are you using special filters maybe?
