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Rediscovering colour photography by direct trichromy



 
 
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  #1  
Old January 4th 07, 12:43 PM posted to rec.photo.equipment.large-format,rec.photo.darkroom,rec.photo.film+labs,rec.photo.misc
Christophe
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Posts: 6
Default Rediscovering colour photography by direct trichromy

Hi,
My good friend Henri Gaud try to rediscover colour photography by
direct trichromy ....
He achieved successfully fine colour 8"x10"photographs, with triX film
sheets.
The first theoric issue is he
http://www.galerie-photo.com/test-trichromie.html
and his blog is very active:
http://photothequegaud.free.fr/trichromie/
The text is in french, but let's see the photographic results!
regards
Christophe

  #2  
Old January 5th 07, 10:36 PM posted to rec.photo.equipment.large-format,rec.photo.darkroom,rec.photo.film+labs,rec.photo.misc
Pudentame
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Posts: 1,139
Default Rediscovering colour photography by direct trichromy

Christophe wrote:
Hi,
My good friend Henri Gaud try to rediscover colour photography by
direct trichromy ....
He achieved successfully fine colour 8"x10"photographs, with triX film
sheets.
The first theoric issue is he
http://www.galerie-photo.com/test-trichromie.html
and his blog is very active:
http://photothequegaud.free.fr/trichromie/
The text is in french, but let's see the photographic results!
regards
Christophe


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.
  #3  
Old January 7th 07, 03:47 PM posted to rec.photo.equipment.large-format,rec.photo.darkroom,rec.photo.film+labs,rec.photo.misc
Christophe
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Posts: 6
Default Rediscovering colour photography by direct trichromy


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/07cel...tauleigne.html

Christophe

  #4  
Old January 11th 07, 01:05 AM posted to rec.photo.equipment.large-format,rec.photo.darkroom,rec.photo.film+labs,rec.photo.misc
Pudentame
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Posts: 1,139
Default Rediscovering colour photography by direct trichromy

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/07cel...tauleigne.html

Christophe


Yup. Anyway, I thought they looked pretty good.
  #5  
Old January 18th 07, 08:21 PM posted to rec.photo.equipment.large-format,rec.photo.darkroom,rec.photo.film+labs,rec.photo.misc
john
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Posts: 3
Default Rediscovering colour photography by direct trichromy


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/07cel...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

  #6  
Old January 19th 07, 12:16 AM posted to rec.photo.equipment.large-format,rec.photo.darkroom,rec.photo.film+labs,rec.photo.misc
Pudentame
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Posts: 1,139
Default Rediscovering colour photography by direct trichromy

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/07cel...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.
  #7  
Old January 19th 07, 02:10 AM posted to rec.photo.equipment.large-format,rec.photo.darkroom,rec.photo.film+labs,rec.photo.misc
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Posts: n/a
Default Rediscovering colour photography by direct trichromy

In article ,
Pudentame wrote:

If memory serves, that's how Technicolor film cameras work, a beam
splitter and filters expose 3 B&W films simultaneously.


Looks that way:

http://en.wikipedia.org/wiki/Technicolor
  #8  
Old January 19th 07, 06:39 AM posted to rec.photo.equipment.large-format,rec.photo.darkroom,rec.photo.film+labs,rec.photo.misc
Tom Phillips
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Posts: 115
Default Rediscovering colour photography by direct trichromy



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/07cel...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.)
  #9  
Old January 19th 07, 06:12 PM posted to rec.photo.equipment.large-format,rec.photo.darkroom,rec.photo.film+labs,rec.photo.misc
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Default Rediscovering colour photography by direct trichromy

In article ,
Tom Phillips wrote:

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.


Better film speed was a factor too. Technicolor was very slow
and required an obnoxious amount of light.

  #10  
Old January 20th 07, 07:52 PM posted to rec.photo.equipment.large-format,rec.photo.darkroom,rec.photo.film+labs,rec.photo.misc
Pudentame
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Posts: 1,139
Default Rediscovering colour photography by direct trichromy

Tom Phillips wrote:

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.



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.)


Perhaps I wasn't clear. I make no claim the Russian guy invented color
photography, only that the images referred to in the original post
reminded me of the images he produced.
 




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