BASIC COMPONENTS OF
A DIGITAL
IMAGE LIBRARY
QUESTIONS TO ANSWER
ABOUT
THE COLLECTION:
-
What
is the size
of the collection?
-
Where
does it reside?
-
Is
it in a state
of growth, or is it a discrete set?
-
What
uses will
the digital images serve?
-
How
long is the
anticipated need for the images?
-
Who
will maintain
the collection after its creation?
-
Who
will provide
the information for the images?
-
Who
has the copyright
to the images?
-
If
not free of
copyright restrictions, how will access be
limited
to
comply with fair use?
HARDWARE
REQUIREMENTS:
-
Computers
with
enough memory and power to run multiple software programs.
-
Server
space to
store images and database and also serve on-line database or web pages.
-
Scanners
able to
capture scanned images at high enough resolution and bit depth (the
ability
to read shadows).
-
CD
Burner or tape
back-up system to store the high resolution scans for storage and
archival
purposes.
SOFTWARE
REQUIREMENTS:
-
Imaging
programs
like Photoshop to crop, color correct, size and save scans in desired
formats.
-
Database
with in-depth
fielded information to allow for easy search and retrieval of images.
-
Web
interface to
present images and information in fast return.
-
Fetch,
FTP or Appletalk
as vehicle for moving images and text.
PERSONNEL:
-
Database
administrator.
-
Server
administrator.
-
Scanning
assistance.
PHYSICAL LOCATION:
-
Secure
environment.
-
Sufficient
electrical
and networking outlets.
-
Correct
seating
and lighting arrangements.
STANDARDS:
-
Standard
vocabularies
like the Library of Congress Subject Headings should be used for
keywords,
titles and other descriptive fields.
-
Image
files should
be given numeric and unique names (i.e. 00000001, 00000002 etc.)
-
Image
file sizes
for the archival scan and all derivatives must be determined.
-
File
formats such
as TIFF, JPEG, GIF etc. should be decided upon and then used
consistently.
FOR EXAMPLE:
The
file sizes
and formats used in the Visual Resources Center are:
Archival
-
2025
dpi
-
About
2000 x 3000
pixel size
-
Between
10 and
18 megabytes in size
-
TIFF
format
-
Stored
on CD’s
Projection (optional - created for in class projection)
-
500
dpi
-
700
pixels maximum
height or width
-
Between
120 kilobytes
and 1 megabyte in size
-
JPEG
format
-
Available
on the
web (restricted access)
Screen size (reference - meant for web viewing)
-
72
dpi
-
500
pixels maximum
height or width
-
Between
17 and
470 kilobytes in size
-
JPEG
format
-
Available
on the
web (restricted access)
Thumbnail
-
72
dpi
-
100
pixels maximum
height or width
-
Between
2 and 34
kilobytes in size
-
JPEG
format
-
Available
on the
web
-
Click
here
to see our slide order form.
-
Click
here
to see our slide burnishing tool.
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