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Re: CMM "interfering" with PS color picker?
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Re: CMM "interfering" with PS color picker?


  • Subject: Re: CMM "interfering" with PS color picker?
  • From: Rolf Gierling <email@hidden>
  • Date: Sat, 03 Feb 2001 14:24:09 +0100

Chris Murphy wrote:
>
> I'm not understanding how you are getting this. I have a ColorSync
> Profile Inspector (no version information) but it doesn't allow me to
> enter in any information. When I enter these Lab values into any other
> application and generate CMYK values for it, I get 0,0,0,0 CMYK.

Chris, open the profile in ColorSync profile inspector.
(Euroscale Coated in this case)

Double click on a B2A entry, which is the Lab to CMYK table.

Click onto the gray shaded triangle in the lower right corner of the
dialog and you can move trough the entries of the LUT.
First three curves doing some pre-mapping of the input values (L,a,b).
Then the Lookup Table itself. With the sliders you can set the input
values, L, a, b. So L=100, a=0 and b=0 is setting the sliders to
32, 16, 16. On the right you can read the output values CMYK 14, 14, 14, 0.

Last four curves doing some post-mapping of the output values (CMYK).

Oh,
This is something I didnt realize, sorry for that, but I was used in
seeing input value tweaking, but I ve never expected such strange output
value tweaking.

Rolf Gierling


References: 
 >Re: CMM "interfering" with PS color picker? (From: Chris Murphy <email@hidden>)

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