124 · SPEC Kit 294
http://www.lib.purdue.edu/spcol/digit/docs.html
Purdue University
compression, file size.
Image Capture Specifications
Last Revised: May 9, 2005
MASTER PHOTOGRAPHIC/RESEARCH
COPY
ACCESS COPY THUMBNAIL
DESCRIPTION Unedited high
quality original
scans that can
serve as
surrogates for the
original artifacts
Also known as the duplication copy
or the “use master.” These scans will
be made available to researchers who
request high quality duplicates for
publication, research, or display
purposes
Copy used for
delivering image
via the web
should be
acceptable
quality for most
research
purposes
Very small copy
used for browsing
presented with
bibliographic record
RESOLUTION
(PPI/ PPI)
600 (with a
minimum of 3000
pixels on the
longest edge)
(oversized may
be 400)
Text images,
scanned in color
or grayscale will
be scanned at 300
PPI. Pixel
dimensions are
dependent on the
size of the
original.
300 72 72
COMPRESSION Uncompressed Yes Yes Yes
FILE FORMAT TIFF* JPG* JPG2000* JPG*
SIZE 100% of original
(up to 11” X 17”)
100% of original 600 pixels on
long side
100-200 pixels on
long side
(They will either be