Julie,
Whether you "scale up" or increase resolution (ppi or "dpi") you will be
increasing the amount of pixels being created. The one thing you want to focus
on when scanning is the pixel dimensions. Everything else will be determined
from those dimensions. ppi or dpi is applied to the ori
-Original Message-
From: mcn-l-bounces at mcn.edu [mailto:mcn-l-boun...@mcn.edu] On Behalf Of
Richard Urban
Sent: Tuesday, November 21, 2006 4:22 PM
To: Museum Computer Network Listserv
Subject: Re: [MCN-L] Question about Scanning Negatives
Julie,
I would avoid using "scaling"
For archival tiffs, scan 3.5 in. negatives at 1800 dpi - if your scanner can
do it. I recommend an Epson Perfection 4990 PHOTO scanner.
Ann
On 11/21/06, Julie Grob wrote:
>
> Hello,
>
> We are about to begin scanning a large group of early 20th century
> negatives. They are about 3.5" square. We
Julie,
I would avoid using "scaling" since this often means the scanner will
be interpolating (aka making guesses) data from what it can't see on
the original. This would also be the case in taking lower
resolution images and increasing their DPI after scanning. It can be
done, but it n
Hello,
We are about to begin scanning a large group of early 20th century
negatives. They are about 3.5" square. We will be creating master TIFFs of
course, but we would like to be able to print larger than 3.5" images. Is
it better to scale up and scan them at something like 200%, or to increa
Hi Julie,
You might look at local guidelines, such as (ours): CDL guidelines for
digital images, version 2.0: November 2005
(http://www.cdlib.org/inside/diglib/guidelines/bpgimages/cdl_gdi_v2.pdf) or
broader guidelines such as those at NARA: Technical Guidelines for
Digitizing Archival Materials fo
