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'm a real beginner and have used APP for a short time. I have processed a number of images in APP and then tweaked them in photoshop as a TIFF. Today something strange happened, after processing an image and then saving it as a TIFF, Photoshop only shows a very flat image of a few stars, not the processed file I created in APP. This has never happened before and I haven't changed my process I don't think?. I have added a couple of screen shots, the one on the left from APP and the same file in PS. Any advice gratefully received bout what I'm doing wrong
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John
PS I hope I have put this in the right place!Â
Make sure that you havent saved in 32 bits TIFF.
Hi John @jao2020,
Thank you very much for your question and welcome on the APP forum !
Okay, if you save an image like a TIFF with the save button below the histogram on the right side, make sure that the stretch selectbox is enabled. Without the stretch, the image is saved without the stretch that you see in the preview window.
Please let me know if that solves it?
Like Stefan @digitaliz-se indicates, it us usually better to save it as an 16-bit TIFF, because some versions of Photoshop by default will not use the enclosed ICC profile in 32bits TIFFs and then the colors can look differently in Photoshop. With 16bit TIFFs all should be fine.
Mabula
Stefan and Mabula,
Many thanks for the replies and very helpful information, thanks too for the welcome. I'm on steep learning curve and I appreciate your time in offering advice. I'm away from home at the moment but with try the suggested actions when back and let you know how I get on
Best wishes
John
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