Color from B&W

[P3D Marvin Jones <Campfire@xxxxxxxxxxxxxx>]

> In one experiment, he took two
> identical B&W photos.  He used a yellow filter in front of the lens in
> one of them.  Using two projectors, he projected them, superimposed, on
> a screen, using the same yellow filter over the projector lens showing
> the filtered image.  He was able to see all colors, though some were
> subdued.
> 
> While the Retinex theory has found considerable use in image processing,
> I am not aware that the full color from two B&W images experiment has
> produced anything commercially useful.
> 
Actually, by photographing through a colored filter and then projecting
through a similar colored filter, this experiment isn't so much "making
color from black and white" as it is replacing color that was removed in
photography. Early Technicolor and later Cinecolor consisted of two B&W
images shot through colored filters and then printed in their respective
colors on the clear film stock. They, of course, used two filters--one
red/orange and one blue/green--but it seems to me that by using only the
more obvious color (yellow) and letting the "blue matrix" go black and
white, this experiment was probably creating as much color as it was
"tricking" the viewer into seeing.


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