RE: filmscanners: SS4000>Vuescan>Grafics Program

["Oostrom, Jerry" <Jerry.Oostrom@Alcatel.nl>]

> -----Original Message-----
> From: shAf [SMTP:michael@shaffer.net]
> Sent: Monday, February 12, 2001 7:42 AM
> To:   filmscanners@halftone.co.uk
> Subject:      Re: filmscanners: SS4000>Vuescan>Grafics Program
> 
> Robert writes ...
> 
> > Why do you worry? The raw file has no been color adjusted.
> 
> The difference beween sRGB and Adobe RGB (or any other
> > work space) is not an image mode change, it is a profile,
> > a definition.  Data is not lost.
> 
>     It would depend on how "Picture window" handles the image data and
> defines sRGB.  If it held to the principles of CM and the use of
> profiles, then it would "change the data" to put the image in sRGB.
> But that principle assumes it was in one color space to begin with
> (scanner color space), and was converted (changed) to sRGB.  On the
> other hand, Picture Window may have simply assumed sRGB ... assigned
> the profile without changing the data.  Do you know how PW works??
> 
        [Oostrom, Jerry]  With the Pro version that facilitates CM: 
*       You can specify a scanner profile for TWAIN input, 
*       you can specify an assumed profile for input of a file without
profile, 
*       you can specify your working space, 
*       printer profile and 
*       monitor profile. 
*       You can specify the conversions and the display to "preserve the
depth" (I don't remember the term PW uses). 
*       you can download a 30-day trial version to look for yourself if it
adheres to all principles of CM. It seems to me it does, but I am everything
but an expert on this subject.
        The conversions do take a few seconds, therefore I assume that they
alter the 'triads', or color values and are in the view of some 'image mode'
changes.
        Note that it is useful to regularly visit the site as the software
has been patched a few times in the latest weeks, some of the patches had to
do with color space conversions (i.e. conversion to sRGB for creation of
slideshows).

        B.T.W. Are there any real disadvantages for the web if you convert
your input tiff with embedded color space to an sRGB .jpg slide and leave
out the sRGB definition for size reduction purposes? I ask because that is
the solution currently (to be) implemented with the newest patch of PWPro3.0
(patch d). To me it looks OK, but how will it look to others on the web?