Digital BW, The Print

ferdinand_paris wrote:
> All of my digital B&W work up to now has been done using images
> straight from a digital camera where the starting colour space is
> known.  I've been able to get WYSIWYG results by turning the image to
> monochrome in PSCS2, and printing through Qimage to QTR using one of
> the designated QTR gray spaces for Qimage.
> 
> Now I am working with an image that I scanned from a B&W 35mm negative
> on my Epson Perfection 1650 Photo using Vuescan.  I'm not getting
> WYSIWYG results at all.  The prints come out quite a lot darker across
> the tonal range.
> 
> Some of the testing that I have done leads me to conclude that I have
> assumed the wrong profile / grayspace.  I have tried outputting the
> image from Vuescan as both a single channel grayspace image, and a
> three channel monochrome sRGB image.  I was sure that the sRGB image
> would give me wysiwyg results, but not so.
> 
> What space should I be assuming that the output image from Vuescan is
> in?  My best guess based on testing is GG2.2 
> 
> F_P
> 
> (Yes, my screen is calibrated using a Monaco Optix XR Pro.)

With Vuescan I select AdobeRGB as output for color. If you 
scan a B&W film in greyscale then Vuescan assigns the 2.2 
Gamma in relation to the AdobeRGB selection. If available I 
use the suited B&W film type curve choices of Vuescan. Scanned 
in 16 bit. In Photoshop CS it is convert to the QTR gray lab 
space (not that important you can also keep the image with 2.2 
Gamma). Edit the image, save it again. Then I convert the 
image to one of the QTR paper profiles in Photoshop as well. 
That file is brought to Qimage and printed to file with its 
color management disabled. QTR does the rest with the curves 
and resolution selected that correspond to the paper profile 
used in the Photoshop conversion.

Ernst
                    --
           Ernst Dinkla


www.pigment-print.com
(         unvollendet         )