Star trails, processing the time lapse images

The weather has been pretty good here, nice clear skies. I took a set of time-interval shots of our local church from our attic window. I have processed these as follows:

  1. Import into DT (latest 3.7 version from the master repository in OpenSuse Tumbleweed)
  2. Use Astrophoto denoise on all the images
  3. Export as 16-bit PNG files (Reduced in size, Hugin doesn’t appear to be able to deal with images greater than 4096x4096)
  4. Blend the PNG files in Hugin using focus stack options (–compression=100 --contrast-weight=1.00 --exposure-weight=0.00 --saturation-weight=0.00 --contrast-window-size=5 --hard-mask --gray-projector=lightness)
  5. Edit the resultant blended image in DT

This is the result:

I am moderately pleased with this, any suggestions to how it could be improved will be gratefully accepted. Happy to post any additional information, though I would suggest that 75x50MB original images is probably not going to be a good idea :grin:

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