Digital BW, The Print

Going back to the original...

rmcooke wrote:

>
>In the August 2002 issue of the Digital Imaging Digest (which is
>written by the folks at the PMA - Photo Marketing Association) they
>cover quad tone printing among others and in the article they mention
>Jon Cone's Piezography system.  They attribute the following quote to
>someone from Cone's company:
>
>""Unlike the Iris process, PiezographyBW does not use a dithered
>pattern. It is as close to silver properties as possible.
>PiezographyBW's perceived resolution is greater than the human eye. It
>renders more than 1,000 gray values in 8-bit mode.
>
I think the problem here is that if Jon is making prints with 1000 
luminance values he's gone totally nuts..  He must be marketing prints 
to CCDs, PMTs, and other sensors..

> The new
>PiezographyBW Pro24 renders more than 4,000 gray values in 16-bit mode." 
>
>  
>

Even more ludicrous..

I think the fault probably lays with the publication in that the writer 
likely misunderstood Jon..

There is no conceivable reason on God''s green earth to use 4000 
greyscale values, unless you like proving you can create things the eye 
cannot perceive..  In that case I would stop at 257 and be done with 
it.. LOL

I would be willing to bet that Jon meant 4000 distinct RGB values on a 
print, when rendered from a 256 greyscale original...  That "more 
information is presented thereby to the human eye than one might get 
from a simple greyscale image"...  That would make sense..

The statement as it is.. well.....  it's nonsense..
Keith
 
 



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