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BlurX "Correct Only"

Ronald Clanton
in PixInsight
Adam,

I've been having some issues with deformed stars in the corners of my image.  They are a result of collimation and/or spacing errors (using a HyperStar on my Celestron 8" EdgeHD) which I'm working to solve.

Anyway... I'm finding that using Russ's BlurXterminator "correct only" feature to produce amazing results in fixing this issue.  The stars are magically transformed into almost perfectly round beautiful stars!  My question is... when is the best time to run BlurX "correct only"?  I've been running as the very first step, but know if this is optimum.

Thanks!

Ron

Comments

  • BlockHeadBlockHead
    It is fine to run this early on and in the case of color images before SPCC. However, there can be one issue (probably not for your 8" data) with undersampled images. The stars will become "brighter" in the sense that the PSFs are corrected. This can mess around with the saturation level that SPCC expects and it will to be adjusted if SPCC is not detecting stars. It is an odd case that I demonstrate in a few videos. The easy solution in this case, is to often just do SPCC first before the BXT correction or to adjust the saturation level in SPCC (which is 0.75 by default).

    -the Blockhead
  • Ronald Clanton
    Thanks Adam!

    Ron
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