Re: Stair Step Iterpolation [Was: Warning: Digital Question]

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From: Clyde Rogers (xrogers@attbi.com)
Date: 12/01/02-11:25:24 PM Z


On Sunday, December 1, 2002, at 10:50 PM, Sandy King wrote:
> I am wondering, however, in my particular situation if this is an
> issue. As noted in my initial message, I am scanning 5X7 negatives to
> 4 X 6.5" size, and can scan them either at the full optical resolution
> of the scanner, which is 2450dpi, or at a lower resolution for at
> 360dpi at the print size. As I see it I could print my scans at 360dpi
> at up to around 24X36", without any interpolation, which is surely as
> large as I want to go right now. So, do I need to be concerned about
> interpolation?

Nope. But still scan at the highest resolution to get a really sharp
result. And again, I don't think Epson flatbed resolution can be
compared to film scanner resolution. Certainly at 13x19 your output is
going to look great.

> BTW, just for the record, a 4 X 6.5" scan of a color negative at 2400
> dpi gives a raw file of almost 400mb. Think my most important need is
> to replace the 100mb Zip drive with a 750mb version.

Burn CDs---more reliable, more universal (it will be easier to read a
CD than a 750 Zip 20 years from now), and much cheaper.

--clyde


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