Re: Eye One Share density values
Re: Eye One Share density values
- Subject: Re: Eye One Share density values
- From: "Bruce J. Lindbloom" <email@hidden>
- Date: Mon, 12 May 2003 14:52:25 -0500
Amadou Diallo wrote:
>
With Eye One Share, is there a way to display Lab values as optical density
>
values? Is there a mathematical formula to convert between the two? I'm
>
measuring grayscale swatches and having OD readings would be a timesaver.
I don't know about Eye One Share, but since you are measuring grayscale
swatches, you may generically convert the L value to density like this:
If L > 8
Y = ((L + 16)/116)^3
Else
Y = (L * 27)/24389
Density = -log10(Y)
This will not be a bona fide Status T measurement, but depending on what
you're up to, it may suffice.
--
Bruce J. Lindbloom
email@hidden
http://www.brucelindbloom.com
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