Digital BW, The Print

> From: Olivier <odesmais@...>
> Reply-To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Date: Tue, 14 Mar 2006 12:22:04 -0000
> To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
> Subject: Re: [Digital BW] Paul's Recommended BW Workspace
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, Steve Kale
> <stevekale@...> wrote:
>> 
>> By assigning I mean that when none is present then the document is
>> given/assigned the workspace.  Your scanner should have it's own
> profile...
>> 
> 
> Steve, I don't want to embark you on a scanner discussion.
> Yes the scanner has a custom profile that needs to be assigned, the
> thing is 1) the scanner needs to be provided with a gamma for raw
> scanning, 

Either I am not familiar with this or I don't understand you.  Perhaps
someone else can help.


>2) when converting to working space the profile-assigned
> file, I get not too close colors and the file opens in PS with a
> AdobeRVB tag. 

When your image is imported to PS it should be tagged with your custom
profile.  If you have PS set to Preserve Embedded Profiles and Ask When
Opening under Mismatches then the fact that the document is tagged with your
scanner profile, presumably not the same as your workspace (colour or
greyscale) then you asked whether you want to use the embedded profile,
convert the file to the workspace or not colour manage the document.

I think what you are saying is that you are not asked this question which
means that either you should amend your colour settings in PS (to preserve
embedded and ask when opening) or the scanner is delivering an Adobe RGB
tagged file (I suspect your RGB workspace is Adobe RGB and hence there is no
mismatch).  In that case, one of two things can be wrong.  Your scanner
settings are incorrect and it is incorrectly tagging the file as Adobe RGB
when it should be tagging files with your custom device-specific scanner
profile or there is poor mapping in scanner software from the device
specific space to Adobe RGB.

I have not used a scanner in a long while and I don't have a Coolscan but
others here should be able to help you ensure that the scanned image is
tagged with the device profile.  Then in PS you would at opening convert the
image from the scanner space to your chosen workspace (Adobe RGB or, as I
would use for colour work, ProPhoto RGB).

>I can't figure out whether this is what the scanner has
> actually registered (it's different from the slide but it's hardware
> limitations) or whether I'm wrong acting at the gamma level and
> should live 2.2 (e.g. display and working space value). And
> corrections in PS on a Tif file are not satisfactory. The thing is
> gamma should have no effect in terms of color shift to my
> understanding : this is where I'm unsure. But again this is not a BW
> topic at all and doesn't call for a reply. It's just to justify my
> question.
> 

I would focus on the above first.  Scanned files should be tagged with your
custom scanner profile by the scanner - the device has its own unique
profile.  If you want, and as would likely be advisable, PS can then convert
these files to a space that is not device specific (Adobe RGB, ProPhoto etc)
for editing and storage (a "workspace") prior to conversion to a (device
specific) print space on the fly at printing.

Hope this helps

Steve