Digital BW, The Print

Hi Chuck,
 
because when scanning as grayscale Vuescan equally takes information from
the three channels (Ed Hamrick himself confirmed this), so if one of the
channels is sharper than the others the only way is to start from an RGB
file.
How much you lose/gain depends on the scanner, obviously. This weekend I
scanned a few PanF+ negatives that were a bit curled, and I found that in
the same scan, in one area the green channel was best, in the rest the blue
channel was best (!). This makes me believe that the three channels have
different focus planes - I can't tell if by design of if my scanner simply
has something wrong. BTW, the amount of this phenomenon is dependent on the
focus location (with Vuescan you can decide the exact point where focus is
taken). In this situation, of course, the only way out is to save the blue
and green channels as layers, and then mask properly... Quite a pain.
 
Alessandro
 

-----Original Message-----
From: cschaible94111 <cschaible@...> [mailto:cschaible@...]
Sent: venerdì 31 gennaio 2003 18:30
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: Re: [Digital BW] Black and White Workflow


Allesandro:

Why not just scan as grayscale in Vuescan?  Is it because you want to 
save the raw scan data?

Chuck



--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Alessandro Pardi 
<alessandro.pardi@i...> wrote:
> What I do with B&W film is get a raw scan from Vuescan (therefore 
as RGB),
> invert in PS, and then look at 100% magnification to see which 
channel is
> best. With my Canon FS4000 the green channel is always the 
sharpest/least
> noisy, so I apply the channel mixer, convert to grayscale, apply 
levels, and
> finally convert to 8bit mode to start playing with layers.
>  
> Alessandro Pardi
> 
> -----Original Message-----
> From: cliffordfeller <cwfeller@m...>
> [mailto:cwfeller@m...]
> Sent: venerdì 31 gennaio 2003 15:48
> To: DigitalBlackandWhiteThePrint@yahoogroups.com
> Subject: [Digital BW] Black and White Workflow
> 
> 
> I am scanning Tri-X on a Nikon 4000ed with Silverprint as an RGB 
> positive file .I am then inverting and converting in Photoshop 
seven 
> using image invert ,levels ,curves and sometimes channel mixer. 
> Which is the best technique scanning  as an RGB or Grayscale?
> If I scan as RGB where is the best place to do the conversion to 
> monochrome ( Channel mixer check box monochrome ?)I have difficulty 
> getting a good black and white conversion in levels and curves 
> alone.My monitoris a  Lacie and it is calibrated  withOptical.
> Any comments would be appreciated.
> Thanks,
> Cliff
> 
> 
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