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.
All
Since upgrading to 1.083 stable, I have consistently gotten an error regarding the adaptive pedestal and pixels being clipped to zero when stacking. The number of pixels clipped has varied with the data set. The images were captured with a stock Canon T4i. The Lights were captured using the Expose to the Right approach, with signal at 50-70% of the histogram - they should not be considered under exposed.  I have ensured that my Darks and Bias were taken at about the same ambient temperature as the Lights (48-52F). Receiving such a warning is disconcerting, and my final stacked images seem to have more noise than usual.  Can you shed some light on the cause of this warning, and how to best mitigate it? Thanks in advance.
Regards - Martin
@martinontheroad Hi Martin, see Mabula's comment in this post
https://www.astropixelprocessor.com/community/appreleases/dark-frame-errors/
for an explanation of the popup and why it is shown. Please download the APP installer again and reinstall APP. Mabula has made some changes since 1.083 was released and has created new installers. With these changes, the condition that triggers the popup has been relaxed and you shouldn't get it anymore unless there is a big problem with the data.
Wouter - Many thanks for the link. Â I will reinstall. Â I was concerned there were serious errors in my data that was triggering this.
Regards, Martin
There might still be issues with the data, because that's why the warning is there. It's just set to a higher threshold now, but if it pops up again, you can continue just fine, but be aware you can actually improve the data.
