Missing L*a*b* color readout – found a workaround?

Permanently deleted user

• 2016年08月14日 06:46

Has anyone found a workaround for the missing L*a*b* color readout? Yes, the Cultural Heritage version has it, but it costs upwards of $4K.

I started my move from Aperture to C1 nine months ago. And while my workflow and RAW processing have improved immensely, I feel that I've lost some control over color because of this missing standard color model. Using the RGB color readout while measuring and adjusting skin tones is especially difficult compared to using L*a*b*.

For those not familiar with L*a*b*, read here: https://en.wikipedia.org/wiki/Lab_color_space

How are C1 users measuring skin values? – in RGB, or some sort of L*a*b* workaround?

Thanks.

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  Paul Perreault

  • 2016年08月14日 17:00

  Create a new process; name it CMYK
  Change the ICC profile to Generic CMYK profile
  Save it.
  
  Now, when you open a picture and have the CMYK profile active the color readout values will show CMYK in percent.
  
  HTH--
  PP

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  Permanently deleted user

  • 2016年08月16日 07:17

  Thanks, ppmax, but I don't understand how CMYK is in anyway related to L*a*b*.
  
  The "L" value is for luminance, which is totally independent of color, and changing it makes an image lighter and darker without changing the tint, whatsoever. To change luminance in CMYK requires changing at least three channels (CMY), and for large changes, all four channels. Or am I missing something?
  
  "a" is for the green to magenta color scale, and "b" for the blue to yellow color scale (this mimics the same color approach as white balance/color temperature and tint). Again, there is no simple, intuitive CMYK channel action that will replicate this.
  
  If you wouldn't mind, please explain how you use CMYK to replicate L*a*b* color measurement. Thank you.

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  Paul Perreault

  • 2016年08月20日 02:33

  If you wouldn't mind, please explain how you use CMYK to replicate L*a*b* color measurement. Thank you.

  
  
  Reading comprehension fail on my part, no less. 🤭
  
  Sorry!
  PP

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  Permanently deleted user

  • 2016年08月29日 00:54

  I've found a workaround. See my post:
  
  Missing CIE L*a*b* color readout – a real workaround
  
  viewtopic.php?f=61&t=24362

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