Pudentame wrote:
>
> john wrote:
> > Pudentame wrote:
> >> Christophe wrote:
> >>> Pudentame a écrit :
> >>>
> >>>
> >>>> This looks like the technique that Russian guy developed for taking
3
> >>>> images sequentially using R,G,B (or was it CMY) filters.
> >>>>
> >>>> Looks pretty good except for the landscapes where the clouds move
> >>>> between shots and & create fringing.
> >>> The russian guy name is Sergei Mikhailovich Prokudin-Gorskii
> >>>
> >>> http://www.cs.cmu.edu/~dellaert/aligned/
> >>>
> >>> A french inventor, Auguste-Jean-Baptiste TAULEIGNE, developped his
own
> >>> trichromy process in the early XXth century
> >>> http://www.medarus.org/Ardeche/07celebr/07celTex/tauleigne.html
> >>>
> >>> Christophe
> >>>
> >> Yup. Anyway, I thought they looked pretty good.
> >
> > Please excuse me if I'm way off base here, but I remember a tri color
> > camera made in the 1950s that simultaneously shot 3 filtered B&W
sheets
> > of 4 X 5 film that allowed one to directly print the 3 colors of a
> > color separation w/o making the separation. I believe that Tri-X or a
> > faster film was used due to the huge light losses due to the splitting
> > & filtering. Does that have any relevance to this discussion?
> >
> > Regards, John Drew
> >
>
> If memory serves, that's how Technicolor film cameras work, a beam
> splitter and filters expose 3 B&W films simultaneously.
John -- technicolor was a process used for most early
color motion picture films through the 1950s, when the
expense was deemed too great and dye color films began
to be used. I don't know if color separations were ever
used for still imaging other than dye transfer. Gone
With The Wind and The Wizard of Oz, if I remember
correctly, are among the first examples of techicolor
motion picture photography. It's demise is a sad loss
to motion picture films (if anyone doubts this see
Lawerence of Arabia on DVD.)
In any case I was required in college to produce a
tricolor separation image using three b&w separation
exposures. The color is unmatched IMO.
However, tricolor photography was first developed by
James Clerk Maxwell in 1861, not Tauleigne or Gorskii,
based on a early 1800s theory by Thomas Young (who
also produce the first ever nonextant photograph in
1802)as well as Herman Helmholtz, that all colors could
be reproduced using additive primary RGB or complimentary
subtractive colors (Yellow, Magenta, Cyan.)
In 1861, Maxwell produced the first ever color separation
color image using three projected lantern slides called
Tartan Ribbon (a color separation image of a ribbon.)
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