Subject:
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Re: OT: Colour photos from Russia in the early 1900s
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Newsgroups:
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lugnet.org.ca.rtltoronto
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Date:
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Wed, 5 Jan 2005 17:04:51 GMT
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Viewed:
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483 times
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In lugnet.org.ca.rtltoronto, Rob Antonishen wrote:
> Prokudin-Gorskii took three B/W pictures through coloured filters and
> would project the developed negatives through a three barelled
> projector and the same colour filters, using a process known as
> Digichromatography.
>
> <http://www.loc.gov/exhibits/empire/>
>
> The Library of COngress has digitized the negatives and recombined
> them in a photoshop type exercise to see the photo as it would have
> appeared in colour.
>
> THought this was pretty cool.
It reminds me of an old Amiga product called the NewTek DigiView, a video
digitizer. At the time, the circuitry to do colour video capture was expensive,
as were colour CCD cameras. So NewTek suggested everyone buy black and white
tube security cameras, which have fantastic detail and contrast. Sending
colour, especially if you use a composite video signal, incurs chroma blurring
anyways.
Well, to get colour captures, you rotated a little cardboard lens (it looked
remarkably ghetto) through red, green and blue, scanning one each, just like the
film camera noted above. The system did three captures, then blended them
together, getting a colour scan.
It was pretty ghetto, but in 1987, it was absolutely out of this world.
Calum
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