Date   : Mon, 23 Jun 2008 22:36:37 +0100
From   : bfoley@... (Brian Foley)
Subject: The Micro User

On Mon, Jun 23, 2008 at 04:25:57PM +0100, neil f wrote:
> Guys, there's very little point in scanning half-toned pages at greater than
> 300dpi, whether colour, greyscale or b/w.
> 
> The images on the page would have been printed at 150dpi max, probably less.
> Computer printers can't print finer than 300dpi (higher claimed figures are

I believe you might be confusing lpi with dpi. lpi is a measurement of
the coarseness of a halftone screen and must be many times lower than
the dpi a printer is capable of because a large grid of pixels is used
to make up each of the halftone cells used to represent continuous tone
image.

See http://fhctech.org/fhc/imaging/halftone.htm

IIRC, laser printers used for magazines typically had a printer
resolution of anything up to 2540 dpi.

Cheers,
Brian.