Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Bob Frost" 
<bobfrost@b...> wrote:
> Austin,
> 
> Surely not. If I take an image of 10 black and white lines of 
pixels (to
> keep on-list) and interpolate one new line by Nearest Neighbour in 
PS, it is
> either black or white, not gray. I only get grey lines interpolated 
(along
> with existing black & white lines being altered to grays) using 
Bilinear or
> Bicubic in PS. That is why I used the words 'duplicate' or 'copy' 
originally

If you're just copying then it's not interpolation.  
Interpolation means to take 2 or more values and arrive 
at some new value between them.  The "between" is important,
else it would be extrapolation.