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Digital BW, The Print

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RE: [Digital BW] Interpolation [was Optimal DPI]

2003-02-27 by Austin Franklin

> 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.

Bob,

You may very well be right.  Some of information I'm finding agrees with you
and basically says that nearest neighbor "doesn't generate any new data",
and as such, it would mean it simply replicates the value of some already
existing value.  That would be the new value would be equal to what ever
original value that new point was nearest.

Averaging, as I suggested, is really a linear interpolation, using only the
nearest neighbor values, to calculate the intermediate values.

According to Cone, their driver does add intermediate values to the 8 bit
data that it gets sent, therefore suggesting some kind of linear
interpolation, and that they also expand the number of bits...since they
claim to print "thousands" of tones.

To think in terms of 8 bit files, I'm not sure using anything more than
nearest neighbor would give you much, if any, benefit, if the driver still
only understands 256 tones...since there mostly wouldn't be any new data
values added between existing values.  For color, I could see it being a
benefit, but given a non-Cone 8 bit workflow, I'd believe there would be
miniscule, if any, benefit.

Austin

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