Re: Luminance nomenclature, STILL wanting to see constant L*
Re: Luminance nomenclature, STILL wanting to see constant L*
- Subject: Re: Luminance nomenclature, STILL wanting to see constant L*
- From: Graeme Gill <email@hidden>
- Date: Tue, 07 Nov 2006 02:26:29 +1100
Ken Fleisher wrote:
I think perhaps what you meant to say was that sometimes Luminance is
calculated using various short-cuts based on different assumptions,
which usually lead to incorrect results. IMHO, this is different from
stating that luminance can have different meanings depending on the
context.
"Luminance" has different meanings in different industries. In
television, it has quite a different meaning to color science.
This is not "short cuts".
An attempt has been made to persuade the television industry
to substitute the word "Luma" in their context, but there
isn't complete adoption of this. See Charles Poynton's
book if you'd like the details <http://www.poynton.com/DVAI/index.html>.
Graeme Gill.
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