A long time ago I actually wrote up a guide on this and put it on my
website because I got so tired of answering the questions regarding
ppi and dpi (and the associated misconceptions) that I'd deal with on
the photo groups on Usenet (dating how long ago I wrote this). It's
still available at:
http://www.tildefrugal.net/photo/dpi.php
On Jan 13, 2009, at 10:56 AM, John Hudson wrote:
> To quote www.NetLingo.com
>
> "Resolution
> "A common computing term, it refers to several things. On a computer
> monitor, it is the number of pixels (horizontally) and lines
> (vertically) on
> the screen. For printers, resolution is a measurement expressed in
> dpi that
> describes the sharpness of a printed image. With sound boards, it
> is the
> number of bits used to encode sounds. And in business, it describes
> some
> form of mutual agreement."
>
>
>
> My printer will work at the following print resolutions; draft, 360d
> [ots]
> per inch through various steps to 2880 d[ots] per inch
>
> Whenever I get prints done out of the house the photo lab asks for
> images at
> no less than 300 p[ixels] per inch.
>
> Is anyone able to provide a clear explanation of the relationship
> between
> pixels per inch and dots per inch ?
>
> Does an increase in pixels per inch generate an increase in dots
> per inch or
> are the two mutally exclusive ?
>
> If a printer's technology can only deliver a maximum or so many
> dots per
> inch is there a formula to show that an image resolution beyond so
> many
> pixels an inch is un-necessary ?
>
> If this question has already been flogged to death I apologise for
> asking
> again.
>
> John Hudson
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> --
> _________________________________________________________________
> Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
> Archives: http://lists.thomasclausen.net/mailman/private/olympus/
> Themed Olympus Photo Exhibition: http://www.tope.nl/
>
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|