Axial Chromatic Aberration correction?

Discussion in 'Digital Photography' started by jerwin, Aug 8, 2016.

  1. jerwin macrumors 68000

    Joined:
    Jun 13, 2015
    #1
  2. chrfr macrumors 604

    Joined:
    Jul 11, 2009
    #2
    Yes, Aperture 3's chromatic aberration correction should handle it in most cases.
    If that doesn't work you could use a color adjustment brush to desaturate the purple areas.
     
  3. dwig macrumors 6502

    Joined:
    Jan 4, 2015
    Location:
    Key West FL
    #3
    You'll likely find that true axial CA (out of focus purple "glow" around edges) can only be mitigated by desaturating the purple (magenta-red) area. The automatic CA removal algorithms found in most software only works on lateral CA (purple on one edge and green on the opposite side's edge and can also be a blue-yellow pairing). Since lateral CA is an alignment/scaling issue it can be fixed mathmatically. Axial CA is a focus issue and would involve selectively sharpening only the colors involved, which in an RGB image can't easily, if it's even possible, be isolated algorithmicly.
     

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