Archived from groups: alt.comp.periphs.scanner,comp.periphs.scanners,rec.photo.digital (
More info?)
"Ken Weitzel" <kweitzel@shaw.ca> wrote in message
news:Ok5wd.503596$Pl.340620@pd7tw1no...
>
>
> Bob Williams wrote:
> >
> >
> > CSM1 wrote:
> >
> >> "JB" <jbrandonbbremove@hotmail.com> wrote in message
> >> news:kb1wd.940$hb7.118@fe03.lga...
> >>
> >>> I want to scan a large number of print photos, which scanner would
work
> >>
> >>
> >> best
> >>
> >>> for this? What tips do you have for scanning these?
> >>>
> >>> - JB
> >>>
> >> For Paper photos and other flat stuff, the Maximum resolution you will
> >> ever
> >> need is 300-600 Dpi.
> >>
> >> Any flatbed scanner you buy today will easily have that resolution.
> >>
> >> For tips:
> >>
http://www.scantips.com
> >>
> >
> > Good Advice!
> > For scanning Photos, almost any flatbed scanner will give excellent
> > results. Also don't get carried away trying to scan at the highest
> > resolution the scanner offers. As CSM1 suggested, 300 dpi is about all
> > you need because a print rarely has more information than that. If you
> > want a warm fuzzy feeling you can try 600 ppi, but I doubt VERY
> > seriously that you will notice ANY difference in image quality between
> > the two, but the 600 dpi scan will contain 4X as many MB to store and
> > manipulate in a photo editor.
> > Bob Williams
>
>
> Hi Bob...
>
> I reply to you; but in reality to all of my peers and betters.
>
> I'd like to suggest a re-think of this, and invite any/all
> interested to experiment a bit. I've done it repeatedly, and
> am certain it's worth it.
>
> If - and that's a big if - you're certain that for now and
> for ever you only want to look at the pics on a monitor, or
> print them at the original size, then I'll (almost) agree
> with you. 300 dpi is going to get almost, if not all, of
> the info available.
>
> But - suppose you're scanning something now for posterity.
> Something like those school photos that we all carried in
> our wallets while the kids were growing. We don't know
> how future generations will feel about them - one day they
> may trigger memories or feelings that may want an 8 x 10
> or better. Right?
>
> Well, I've proven over and over that scanning it at 2400,
> then de-noising/cleaning/etc (be prepared to spend lots of
> time) and saving that means 8 x 10's or larger will be
> availabe if ever they're wanted. Without ANY of the
> pixelation of upsampling!! Try it; it's true.
>
> Next, if you wish, you can downsample that image to
> say 800 600 for viewing, and after a bit of unsharp it
> will be much much sharper than scanning at 300 in the
> first place. Much!
>
> Save both - pass on both for future generations to do with
> as they will. I save mine on cd/dvd's as two subs under
> a descriptive name - ie:
>
> c:\wallet (.txt describing what the pics are)
> c:\wallet\view (800 * 600 fine quality jpeg's )
> c:\wallet\print (huge ones's - tiff)
> c:\wallet\text (800 *600 fine quality scans of backs, if not
>
> blank)
>
>
> Just one old guy's opinion. I invite others.
>
> Ken
>
I agree with Ken in the case of wallet size photos, you could scan at a
higher resolution in order to get a larger image from the small image of a
wallet.
A wallet size is 2 x 3 inches, so if you want to blow up the image to an 8
x10, you would have to increase the size of the image by 4 times.
Assume, 300 dpi for the most information the wallet photo contains, then to
get a 4X enlargement, you scan at 1200 dpi.
The cost of scanning at 1200 dpi is a large file size, the image will not
contain any more information, it will just be bigger.
Since, an 2 x 3 inch is not the same ratio as 8 x 10, you will crop some to
the image to fit 8 x 10. A 2 x 3 is a 1:1.5 ratio, 8 x 10 is 1:1.25 ratio.
The only time you need more than 300-600 dpi is when you want to enlarge a
small photo. The photo still only contains about 300 dpi of information.
There are exceptions to the rule.
I have scanned documents at 600 dpi because the document contained fine
lines that were missed at 300 dpi. Electronic schematics have fine lines
running vertically and horizontally which are missed at 300 dpi.
Wayne Fulton covers that on his Scantips.com.
http://www.scantips.com/basics02.html page 1
http://www.scantips.com/basics2c.html page 2
Again, just about any scanner you buy today will have that much resolution.
--
CSM1
http://www.carlmcmillan.com
--