[filmscanners] Re: Ink-jet Print File Resolution; was: Pixels andPrints

["Arthur Entlich" <artistic-1@shaw.ca>]

One question...

If one sends the printer a 720 dpi file, does it not alter the file to
create the dithering patterns, etc?  In other words, does providing a
720 dpi file prevent up and down sampling and the "damage" the printer
driver/spooler might cause to the image file?

Art

Austin Franklin wrote:

> Hi Preston,
>
>
>>Bob Frost (I believe it was) advocated sending 360ppi or 720ppi files to
>>a 720dpi desktop inkjet printer. It certainly makes intuitive sense that
>>on a 720dpi printer, a 720ppi file would work best.
>
>
> Why you want to send the Epson, specifically, desktop printers 720 is
> because they interpolate/decimate the image you send it TO 720PPI (not DPI)
> prior to dithering, using a rather rudimentary interpolation, and perhaps
> horrible decimation, method.  If you sent it the image, using a better
> "scaling" (interpolation or decimation) method, theoretically, you could get
> a better resultant image printed.
>
> It does make sense, as you say, that the 720 is an "even multiple" of the
> printer DPI resolutions of 360/720/1440/2880...and certainly that is one of
> the reasons they rescale the image to 720...but that doesn't mean it'll
> print at 720, it will print at any of it's native resolutions using the 720
> prior to dithering.
>
>
>>Are there some
>>other sources (besides Members Magic Eyes) that cite this?
>
>
> This was stated by Epson that they resample to 720 for the desktops and 360
> for the large format printers.
>
> Regards,
>
> Austin
>


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