[filmscanners] RE: dpi - formerly PS sharpening

["Paul D. DeRocco" <pderocco@ix.netcom.com>]

Just changing the dpi number doesn't change the size of the file; it changes
the size (in inches) of the image. It's really quite simple: an image file
contains a certain number of pixels. It also contains a number that tells
how many dots per inch it supposedly is. Programs are free to obey it or
ignore it. Web browsers ignore it.

--

Ciao,               Paul D. DeRocco
Paul                mailto:pderocco@ix.netcom.com

> From: filmscanners_owner@halftone.co.uk
>
> Anthony, your comments concerning dpi raised a few questions for me.  I
> understand why leaving the dpi at the scanner resolution can
> slightly deter
> theft from those who wouldn't know how to change the size of the
> image.  By
> leaving the dpi at 2700 or 4000, is the file size larger than it
> would be at
> 72dpi?  If so, I can see a distinct advantage to reducing the dpi to 72.
> Also, by leaving the dpi at 2700 or 4000 are you creating a higher quality
> graphic file? If so, than that will give the final user the ability to
> create better reproductions.  Wouldn't that overcome the theft
> advantage of
> leaving the image at 2700 or 4000 dpi.

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