Archived posting to the Leica Users Group, 2001/07/24

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Subject: RE: [Leica] Re: Digital Leica and reality
From: "Austin Franklin" <>
Date: Tue, 24 Jul 2001 09:16:22 -0400

> No, dots of ink are output pixels put on paper.  They are somehow invented
> or derived by a math algorithm.  They are not in the set of input captured
> pixels.  They represent a new set of data prepared specifically
> for output.

Dots of ink, are just dots of ink.  A grayscale pixel is transformed into a
set of dots that will display that relative density.  Nothing is "invented",
it is though technically derived by a math algorithm.  That is NOT the same
as "invented" or "made up".  I think you're missing some understanding of
how halftone screens work, since it is exactly the same thing.

I don't understand what you have invested in believing that the Piezo driver
"invents" data.  It simply does not.  It is a deterministic transformation
of pixels to printer dots.

> Chemical prints and analog film have pixels as well.  They are
> more commonly
> called molecules or grains ( as in T-Grains).  They represent the smallest
> captured element of light in the emulsion.  A digital pixel is
> the smallest
> captured element of light in the sensor.  The analogy is complete.

They are the smallest element of "capture" but they are not near the same.
Film grains are very random in shape and size.  Pixels represent a perfect
square section of an image and do not vary in shape and size.

I don't get what your point was with this second paragraph?