Well, you can do this with Photoshop's curves command. Although there are no
"built in" commands to address this, it's doable. In fact, to get a good grey
scale conversion of a typical color image one first must mess up the color or
you'll wind up with a flat low contrast grey scale. Just another reason why a
single master image falls short BTW. Dan Margullis book, *Professional Photoshop
5: The Classic Guide to Color Correction * describes how to do this. Further, to
see how far you can take this, Outdoor Photo had an article recently on
mimicking B&W IR film using PS.
>>> Chip Stratton <cstrat@xxxxxxxxxx> 03/05/00 07:47pm >>>
> As for filterless photography, I was just thinking how digitally one
> could mimic the effect of using a black and white contrast filter (like
> a R25) if they shot the scene using color film and then enhanced or
> reduced a particular color in a scan using image manipulation software.
> Hum, one more reason not to bother shooting B&W film.
I've been thinking the same thing, Gary. I'm a bit surprised that these
image editing programs don't have 'built in' the effects of the standard
color filters we commonly use. Maybe I haven't looked at the right
programs yet, but it sure would appeal to film photographers making the
transition to digital image manipulation to be able to choose a digital
81A filter from a menu, or say an R25 before converting to a B+W image.
Chip Stratton
cstrat@xxxxxxxxx
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