Digital BW, The Print

I don't believe that's true. You can test this with a Channel Mix layer,
just compare the conversion with and without.

To the OP; if you have signifcant fringing, then it likely will affect the
gray conversion as well as (though less than) the color image. That said,
you're still much better off converting in PS than the scanner software, as
there you have full control over the conversion process. Learn to use the
channel mixer.

Bill

On Sun, Jan 4, 2009 at 10:36 PM, outdoornm <outdoornm@...> wrote:

>   Dale,
>
> ...Photoshop converts to grayscale directly in the
> red channel. ie, Image>Mode>grayscale (100% red, 0% green, 0% blue)
>
> There are other ways to grayscale, using various values of red, green or
> blue, but I would
> suspect that scanners use the same 100% red channel method.
>
> Lincoln
>
>
> - In DigitalBlackandWhiteThePrint@yahoogroups.com<DigitalBlackandWhiteThePrint%40yahoogroups.com>,
> "dale40203" <dhoff@...> wrote:
> >
> > How does an RGB scanner determine Greyscale equivalents? Is there a
> formula it applies
> to
> > the three components? If so, would the color "fringing" I see on some RGB
> scans
> contribute to
> > a softening of Greyscale scans?
> >
> > The only way I can see to avoid this is for only one of the RGB
> components to be used,
> and I
> > know that would not be an accurate representation of RGB translated into
> GS.
> >
> > Thanks,
> > Dale Hoffman
> >
>
>  
>



-- 
Regards,

Bill Morse
Wm. Morse Editions

http://www.MorseEditions.com/


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