[opendtv] Re: New Chips Improve Color TV Dramatically

Mark, we all agree that they are near identical. We all agree that the
numbers in xy chromaticity do not permit that conclusion directly. But,
those of us with any knowledge of colour science also know that in whatever
colour space they are portrayed, the differences are miniscule. Nuff said.

----- Original Message ----- 
From: "Mark Schubin" <tvmark@xxxxxxxxxxxxx>
To: <opendtv@xxxxxxxxxxxxx>
Sent: Tuesday, June 29, 2004 10:36 PM
Subject: [opendtv] Re: New Chips Improve Color TV Dramatically


> I'm not sure there's much more value in pursuing this, but I'll take one
> final crack.  If, on a scale of tens of millions of years, I plot the
> rise and demise of dinosaurs, that's pretty common.  If, on the same
> scale, I plot the birth of every person on this list, they will all
> occupy a point at essentially the same coordinate.  But we were not all
> born at the same time.
>
> Similarly, the CIE x,y coordinates are useful for many purposes but are
> not ideal for identifying perceptually different color primaries.  Once
> again, I agree that the primaries being discussed ARE perceptually very
> close (I was involved in some of the standardization).  I simply point
> out that the x,y coordinates are not a way to prove that they are close,
> any more than a geological time scale is good for differentiating my
> birth date from yours.
>
> TTFN,
> Mark
>
>
> Alan Roberts wrote:
>
> >Sorry, Mark, but elementary colour science does just that, as I
explained.
> >In any chromaticity space, those primaries are near identical sets. The
> >table of numbers is only that, a table of numbers, but they represent
> >colours which when plotted in any sensible chromaticity diagram or colour
> >difference diagram, will show that they are darn near identical.
Semantics
> >can't get you away from that obvious conclusion.
> >
> >----- Original Message ----- 
> >From: "Mark Schubin" <tvmark@xxxxxxxxxxxxx>
> >To: <opendtv@xxxxxxxxxxxxx>
> >Sent: Tuesday, June 29, 2004 1:59 PM
> >Subject: [opendtv] Re: New Chips Improve Color TV Dramatically
> >
> >
> >
> >>1 - Granted, the primaries are perceptually similar, but
> >>2 - You cannot prove that from your numbers.
> >>
> >>TTFN,
> >>Mark
> >>
> >>
>
>
>
>
>
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