Digital BW, The Print

tboleyyh wrote:

>--- In DigitalBlackandWhiteThePrint@y..., "Editor P.O.V. Image Service" 
><editor@p...> wrote:
>snip
>  
>
>>the numbers of which you speak, but that isn't really greyscale..
>>
>>Keith
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>>
>
>I'm not sure why this is so hard to understand. There is nothing 
>grayscale, or single channel, about quad tone printing except your 
>original file.
>Unless you are sending single channel info to a single channel driver 
>to one ink (as in K only Epson driver printing), non of these 
>arguements address what I'm talking about.
>Tyler
>
>  
>
This was the problem I think... On the one hand.. we are speaking 
greyscale.. you have been speaking RGB, so people have been talking past 
each other..

Theoretically, it would be possible to get more than 256 RGB levels from 
an 8 bit file when dithering/overlapping values...

If you have RGB levels(colors) that can overlap or dither, surely you 
can get more than 256 values out of that combination..

BUT...

At the same time.. there would still be a max of 256 discrete greyscale 
or luminance values..

So, both you AND Austin are correct..

Of course, the question is, is there and advantage to this method?  How 
predictable would transitions between values be?  (I am guessing that is 
what the software has to be properly designed for to create these 
transitional values smoothly)

Remember that we are starting with a file with only 256 levels anyway.. 
 So those transitional levels are going to be pseudo-values or 
interpolations of a sort..  (It's analogously like colorized B&W film 
--  yeah we have colors that we can now perceive, but in many cases they 
represent something that never perceptibly existed for any human eye)

Keith
 




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