Tech Support > Computer Hardware > Scanners > Scanning old glass negatives
Scanning old glass negatives
Posted by Don on January 26th, 2005


On Tue, 25 Jan 2005 21:11:39 +0000, Kennedy McEwen
<rkm@nospam.demon.co.uk> wrote:

That's *very good* to know!!!

I was a bit apprehensive about scanning B&W photos in color. On the
one hand color gives more information to facilitate editing but I was
concerned about the extra step of light going through filters.

But if the filters are built-in and even a "B&W scan" actually scans
in color, then there's no difference on that account.

Out of curiosity, how is a B&W scan done then? Are the three color
components combined (i.e. ~60% green, ~30% red, ~10% blue), or is one
(e.g. green) simply declared as the "B&W scan"?

And that explains something else! A (very!) slight apparent
misalignment of three colors (also noticed for the first time on a B&W
photo). I always wondered about that, but now it makes sense.

Don.


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