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From: ImageAnalyst <imageanalyst@mailinator.com>
Newsgroups: comp.soft-sys.matlab
Subject: Re: Lab color space issue
Date: Mon, 12 Oct 2009 08:15:56 -0700 (PDT)
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I second what John says.  This question makes no sense (not to mention
the fact that you were hoping for responses practally instantly).  You
need to clarify.  If you must have an answer without clarifying, then
I submit this: use a colorimeter or spectrophotometer instrument to
"find" a and b.