Proper Comet Imaging?

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  • Makes sense, thanks!

    I'm going to reprocess an OSC session (104 x 90s subs) from mid-January using the latest info. I appreciate the level of detail and the "tricks" in your videos. They have helped me transition away from Photoshop for post-processing and really enjoy the nuances of PI.
  • Thanks @BlockHead for the OSC workflow.  I'm working through it with my data, excited to get to my final result.  Your comment about using GPU for StarXterminator encouraged me to figure out how to get it configured for my 3080 board.  That cut my star removal time from 17 hours to about 30 minutes.  So much better!
  • Indeed...
    -the Blockhead
  • FWIW, for StarXTerminator, you can select one of the other AI neural networks to shave off more time by trading quality. By evaluating each one on just a single sub, you might find the difference to be negligible.

    From the SXT release notes:

    The AI11 neural network comes in three variants to maximize compatibility with various computer hardware. Use whichever will work on your machine and suits your purposes:
    The full version produces the best results, but makes intensive use of compute and memory resources, and may take a very long time or not work at all on older or less-endowed machines.
    The "lite" version uses about 4x less memory and may improve execution time on less-endowed machines.
    The "lite.nonoise" version omits the noise matching module, and will significantly improve execution time, but areas where stars once were will have little to no noise. This is generally not an issue if noise reduction has been or will be performed on the image.
  • Here's a reprocessed version of OSC frames captured back in January, applying Adam's techniques from the latest Horizons OSC episodes. The things I improved upon:
    - preserving objects in the stars only image (including a galaxy!) by using the comet subtraction approach (in addition to SXT for comet only)
    - better color balance of the comet based on the white balance factors derived from SPCC (on stars only)

    image
  • Loved it!!
    -the Blockhead
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