Digital BW, The Print

In a message dated 12/2/06 7:17:57 PM, claudej1@... writes:


> Since conversions of equal luminances of 2 spectrally
> opposite colors remove the color contrast, we must use pre or post
> processing color distortions to create a visually pleasing image WITH
> those contrasts
> 

Yes, I used to use a color image of cows in a pasture under lilacs as a 
sample image for students to convert to B&W. The B&W Holstein cows converted nicely 
by they would always be quite suprised when the lilacs diappeared into the 
foliage on conversion. Getting them to work with channel blending (or more 
recently CameraRAW channel adjustments) to bring out contrast between the lilacs 
and the foliage was a good way to get them thinking about the relationships 
involved.

Another tutorial I find effective is to slide the CameraRAW saturation slider 
all the way to desaturated. Then adjust the master curve to offer effective 
black and white global and local contrasts. Now resaturate the image, and see 
what those adjustments do to the color image...

C. David Tobie
Product Technology Manager
ColorVision Business Unit
Datacolor Inc.
CDTobie@...
www.colorvision.com

C. David Tobie
Product Technology Manager
ColorVision Business Unit
Datacolor Inc.
CDTobie@...
www.colorvision.com


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