Digital BW, The Print

Why do it yourself while there are more knowledgeable people (maybe 
you're a scanning expert but I'm not for sure) than me doing all the 
necessary tests (which I can't do due to the lack of a densitometer) 
in correct methodology to provide film profiles? I care more 
for "usable data" than a raw "all data" and I wouldn't go far as 
claiming "I know better than scanner hardware and/or software 
engineers" - such as people at Silverfast or Ed Hamrick. Aren't the 
film profiles provided in Silverfast and alike softwares designed 
by "professionals" for doing RGB to grayscale convertion "in the 
right way"? Please note my "linear" comment about channel mixer. If 
you examine profiles in Silverfast in advanced mode you'll notice 
that they are "non-linear". This fact makes me think that these 
profiles are more useful/successful than the linear convertion I 
would apply by the means of channel mixer. Anyway, I feel more 
comfortable and productive in scanning thanks to these profiles, dot. 
YMMV.

Regards,
Loris.

---- Orijinal Mesaj #1 ----
Kimden: julianthomas@...
Kime: DigitalBlackandWhiteThePrint@yahoogroups.com
Bilgi: 
Konu: Re: [Digital BW] SilverFast Ai 6 question
Tarih: 5/13/2003 6:54:47 PM
I feel Austin about to pounce! All scanners scan in RGB mode and 
convert and
invert in the scanner s'ware. CCD scanners tend to have some channels 
of the
RGB more accurate than others , red blooms for instance and on some 
of my
scans has more noise in the shadows, by doing the conversion yourself 
you
can fine tune the conversion. You also have 'all the data' if you 
scan in
raw even if you scan as a 16bit greyscale and let the s'ware do the 
RGB
conversion. i agree with you about the RAM issue though. But before 
we know
where we are folk will be using AF cameras and inbuilt exposure 
meters if
you let the software do all the work...

Julian
----- Original Message ----- 
From: "Loris Medici" <lorism@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: Tuesday, May 13, 2003 4:38 PM
Subject: RE: [Digital BW] SilverFast Ai 6 question


> Hello Julian,
>
> I don' undestand why should I scan a grayscale image in RGB mode? I 
do
> it in 16bit mode always and never use channel mixer. This is not 
about
> the most accurate data but inconvenience - I save time and RAM by 
using
> the canned profiles instead channel mixer (an additive step) which 
is
> "linear" and grayscale mode. My point was more about misinformation.
>
> Regards,
> Loris.