Digital BW, The Print

Mike,

The "Desaturate" command simply removes all the color information from all
three channels and each channel continues to contribute 1/3 of the info to
composite image. With "Channel Mixer" you gain control of the three channels
and can independently set the amount each channel contributes to the
composite image.

I don't know that I would upgrade to PS7 from Elements for this alone but
there are so many other reasons to move up you really should do it as soon
as you can.

Martin Wesley

http://www.borderless-photos.de/guests.html



----- Original Message -----
From: "michaeladawson_ajax" <mike.dawson@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: Tuesday, July 30, 2002 12:44 PM
Subject: [Digital BW] Re: Converting to B&W Workflow question


> I read several of the replies and they are all correct but I don't
> believe they addressed the exact intent of the question.
>
> The replies all focused on using curves and channels to mimic the
> effects of putting different filters on the camera.
>
> Unless I missed it, though, no one has addressed the issue that B&W
> film is not neutral in its response to the color spectrum.  Its
> pretty good compared with decades ago.  But my understanding is that
> it is still not truly panchromatic.
>
> In other words the film responds slightly differently to red, green,
> blue wavelengths of light.  And each manufacturer creates films with
> slightly different response characteristics.  So desaturating in
> Photoshop yields an image which is different than what would be
> obtained by B&W film.  Using the channel mixer allows one to simulate
> the response of B&W film to different wavelengths of light.
>
> Then there's the whole issue of film grain.  And even that has a
> Photoshop plug-in available.
>
> Mike
> --- In DigitalBlackandWhiteThePrint@y..., "millerhillsteve"
> <steverob@s...> wrote:
> > I currently am using PS Elements as I can't afford Photoshop and
> frankly, my
> > prints are pretty damn good, but I've seen references to using the
> channel
> > mixer instead of simply switching the mode to greyscale. What are
> the
> > differences in desaturating an image when switching to greyscale?
> >
> > Steve
>
>
>
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