Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, BKPhoto@... 
wrote:
Hi Bill,

Thanks for your comment as well. Soem questions though:

>  I'd add to Tyler's comments that the illusive "three dimensional 
quality" idea is closely related to the internal tonal structure of 
an image. This has always been true, from the earliest photographic 
printing processes to inkjet printing. Wet darkroom printers often 
refer to this as the "internal contrast" of a print; the local 
contrast rather than the overall contrast. Internal contrast helps 
separate close values and, in my experience, this is a major 
contributor to that dimensional quality.

I'm not sure I completely get what you mean. I'm having trouble to 
visualize the length scale of "local". Are you meaning the 
microstructure/texture, or over a more larger scale, let's say 5% of 
the image, typically parts of key objects. or both? Could you 
elaborate it bit furhter on this?     


>  When you add hue, or subtle shifts in color, in a monochrome image 
you get an accumulative effect. The color is perceived as part of the 
internal contrast of the image. 

I think I understand that one.

> Lastly, this sense of internal contrast is affected by any number 
of issues: the grain structure of the image, sharpness (optical and 
printing), and the size of the print.

Not sure I understand this one, but as said before: I have some 
trouble understanding the concept.
 
Joost