>From what I've read, you scan at twice the resolution you want to end up
with. When you resize and halve the DPI, pixels are averaged together.
Distorted pixels are eliminated in this procedure and moire (?) pattern
(if any) is often eliminated. Resizing is always down from large to
small.
These are instructions which came with my Visioneer scanner. I've
played around with scanning on these terms and the results have been goo
dso far. Thanks for your help.
John
Joel Wilcox wrote:
>
> At 04:37 PM 3/15/99 -0500, you wrote:
> >I am curious regarding your technique for scanning. I have not seen
> >your site yet, but I will, I promise.
> >Obviously, the desire is to scan at the highest rate possible for best
> >appearence, but you also have to end up with a low enough DPI to keep
> >loading time down. Also, any DPI setting over 75-100 is wasted on the
> >web.
> >Right now I scan at 300 DPI, resize to 150 DPI, then "convert to web
> >image" at 90 DPI. I am still new at this. Others may have a better
> >technique.
> >How do you scan for the best results on the web?
> >
> >John
> >
> John,
>
> PMFJI, but all things being equal, you are probably better off avoiding any
> resizing that you can. So if you want to print at 300 dpi, try to scan to
> that resolution. If you have to resize, obviously it's best to resize
> downwards, so scan initially to your highest needed resolution.
>
> Remember that an ordinary photographic print usually has only about 100 dpi
> worth of detail in it (so I'm told), or at the most about 200 dpi. But
> apparently scanning to the desired resolution for whatever output you want
> and avoiding resizing is the ticket to the highest quality output.
>
> It looks to me as though you're doing it right, although I don't understand
> why you're resizing to 150 dpi as an intermediary step.
>
> Joel
>
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