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Photo Forum / Film Photography / Darkroom / January 2007Rediscovering 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 here: 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 > Hi, > My good friend Henri Gaud try to rediscover colour photography by [quoted text clipped - 8 lines] > 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. Pudentame a ?crit : > 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 > Pudentame a écrit : > [quoted text clipped - 13 lines] > > Christophe Yup. Anyway, I thought they looked pretty good. > > Pudentame a écrit : > > [quoted text clipped - 15 lines] > > 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 >>> Pudentame a écrit : >>> [quoted text clipped - 23 lines] > > Regards, John Drew If memory serves, that's how Technicolor film cameras work, a beam splitter and filters expose 3 B&W films simultaneously. >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 > >>> Pudentame a écrit : > >>> [quoted text clipped - 26 lines] > 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.) A lot of advertising photography was once done with separation cameras, one type was called a one-shot since the image was created on three sheets of film with one shot. I recall reading about it in an early photography annual. Petersons' Photography once published plans for a drop shutter with three windows using different filters so you could do a tri-color shot on one pie ce of film--interest for clouds, waterfalls and other moving objects. darkroommike >>>>> Pudentame a écrit : >>>>> [quoted text clipped - 52 lines] > color image using three projected lantern slides called > Tartan Ribbon (a color separation image of a ribbon.) > A lot of advertising photography was once done with separation cameras, > one type was called a one-shot since the image was created on three [quoted text clipped - 3 lines] > a tri-color shot on one pie > ce of film--interest for clouds, waterfalls and other moving objects. I remember that contraption, but it wasn't intended to produce separations. It was strictly a special effects thing. It was a vertical drop shutter that passed an array of filters across the lens. I can remember something I read fifty years ago but not what I had for lunch yesterday. >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. >>>>> 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 [quoted text clipped - 11 lines] > 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. Well, your post said "looks like the technique that russian guy developed..." Course I was already very familiar with Gorskii and had high appreciation of his work! But in fact James Clerk Maxwell developed tricolor photography based on Thomas Young's [very] early theories. Cheers... > >>>>> Pudentame a écrit : > >>>>> [quoted text clipped - 20 lines] > photography, only that the images referred to in the original post > reminded me of the images he produced. |
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