Digital BW, The Print

> Austin, I checked out the info on the epson site about the 2450, and read that
the resolution is 2400, but no mention of NATIVE RESOLUTION, Is the answer to
the question 2400?
> David

I'm not Austin, but I'll speak up. Yes, you got the right answer.

Think of native resolution as the highest resolution the scanner can do without
interpolation (where new pixels are 'created' by the software).

The Epson 2450 can scan at 2400 x 4800 samples per inch. Imagine a row of
sensors spaced at 1/2400 inch, which steps across the original at 1/4800 inch
intervals. But your image editing program (Photoshop or whatever) can't deal
with pixels that are not on a square grid.

To use the 2400 x 4800 scan the scanner software has to interpolate to 4800 x
4800, by 'inventing' the missing pixels by averaging the neighbouring pixels. If
you tell the scanner to sample at 2400 x 2400 the sensors step across the
original at 1/2400 inch intervals, and every pixel is 'real'. Native resolution.

Peter Marquis-Kyle