Digital BW, The Print

Carolyn Frayn wrote:

>
>I thought Tyler was talking four channels/ ink delivery/ four inks/ three
>grays and a black - creating a grayscale image on paper from an image file.
>  
>
Yes, but think Carolyn, the inks could have differing chroma -- just as 
they do in a traditional color inkset..  The VM or VM Sepia sets would 
be clear examples.. You have the ability to represent more than 256 
values by representing luminance and a sort of transitional 
Pseudo-luminance with chroma..

>You are both talking about a grayscale image file, a single channel
>grayscale image file.
>  
>
Yes,  which can have a maximum of 256 discernible levels.. That's all.. 
The human eye won't see more than that.

>The original thought was that the peizo driver could not produce the number
>of levels a statement from Cone stated no?  This is with respect to the
>print, not the image file.
>  
>
Right... and  if you start with 256 luminance values... and  4 inks of 
VARYING chroma...  imagine the 256 levels as a two dimensional  256 
swatch chart instead of the 256 levels of a one dimensional greyscale 
file...

Although your swatch chart may map to 256 discrete values, the 
combinations of those 256 values will certainly be "capable" (not 
assured of) giving more than 256 values..  You see why? 

>You and Austin are arguing Tyler's point, I don't understand why since it
>seems to be a different thing you are thinking about.
>
>  
>
Read the part of my earlier post on how people have been "talking past 
each other on this"...




Keith
 



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