On Wednesday, August 13, 2003, at 12:22 PM, gfen wrote:
On 13 Aug 2003, Richard Starr wrote:Here is a way to see this. Take a good quality 4x6 photographic print. I mean
a good one from a good processor who knows how to focus his machine. Stick it
in your flatbed scanner and scan it at 600dpi and 300 dpi. On your monitor,
zoom in on a sharp detail of the image in both versions and see if there is any
difference in detail, sharpness, apparent graininess or anything else.
This is your scanner, and you're looking at output. This means nothing.
I'd bet you won't see any more in the higher resolution image, because detail
that fine isn't in the original print.
What bearing does a scan of a print have to do with print quality? Because
a printer only printed at 300dpi, that a scanner at 300dpi can't pick up
anymore? This is flawed.
Flawed but accurate in its own way. Scan that 300dpi image at 600 or even 1200 and yes you will pick up more information. But it will be unwanted information in the form of red green and blue dots that make the image look awful.
Yes, output is a different matter. Take that 300dpi image scanned in at 300dpi and then print at 600dpi on photo paper (or quality inkjet paper): result is your printer will interpolate the necessary output.
Hamlin
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