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Re: filmscanners: RE: filmscanners: Pixels per inch vs DPI

Chapter 14 of Professional Photoshop - "Resolving the Resolution Issue":

printed dots per inch consist of grids of spots per dot - of differing 
picoliter sizes depending on the printer.

Apples and oranges?


----- Original Message ----- 
From: "Rob Geraghty" <harper@wordweb.com>
To: <filmscanners@halftone.co.uk>
Sent: Friday, October 26, 2001 8:17 PM
Subject: Re: filmscanners: RE: filmscanners: Pixels per inch vs DPI

| "SKID Photography" <skid@bway.net> wrote:
| > Are you saying that because inkjet printers employ a schoastic dithering
| pattern to represent pixels that film
| > grain and scan pixels (samples, whatever) are equivalent in regards to the
| amount of information they impart
| > to an inkjet printer?
| I think Art was saying that the relationship between pixels in the file and
| dots on the page isn't clear cut because the dither pattern used by the
| printer driver is random and therefore undoes some of the regularity of the
| pixels.  The print ends up looking smoother than say a monitor image because
| the printer shadings aren't constructed as rectilinear sharp edged objects
| but random spots of colour.
| Rob


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