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 am processing the OSC Calibrated images of M45 from the Premium Set from iTelescope. As this is my first attempt at OSC image data, I was wanting to conform that the following is the correct way of loading the initial images:
- Prior to loading the images into APP, use the 0) RAW/FITS Tab to set the pattern (example: RGGB) to match the camera specifications as indicated in the FITS Header, set the algorithm to Adaptive Airy Disk, and check the box for force Bayer CFA.
- Use the 1) Load Tab to load the files into APP.Â
As a side note, I attempted to load one image using the above process and the image when checked in APP has a green background tint.
Thanks in advance for advice and guidance
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Attaching screen shot of how the loaded image appears
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I am processing the OSC Calibrated images of M45 from the Premium Set from iTelescope. As this is my first attempt at OSC image data, I was wanting to conform that the following is the correct way of loading the initial images:
- Prior to loading the images into APP, use the 0) RAW/FITS Tab to set thepattern (example: RGGB) to match the camera specifications as indicated in the FITS Header, set thealgorithmto Adaptive Airy Disk, andcheck the boxfor force Bayer CFA.
This should not be required, leaving it at the standard settings should process an OSC image that has the correct header information, just fine. Also no need to force Bayer CFA usually.
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Thanks for the quick response and explination of the processing of OSC images
Well, i have the same issue with images from iTelescope as well as my QHY268c.
When using default settings all images are green, when choosing force Bayer CFA and RGGB Pattern all images and the result is gryscale only.
And it is not a Fits Header issue, all thes images can be processed fine in DeppSkyStacker and PI.
