African Posters: Technical Specifications
Digital Images Processed by:
Luna Imaging, Inc.
(archival images on Photo CD)
Preservation Department,
Northwestern University Library (derivative images for the Web)
Production Dates:
1996, 1997-98
Intermediate Copies:
Posters photographed on Kodak R2 135-36 (ISO 25 color negative) film using
Kemlite MW9
lamps with Speedotron D800 power packs
Archival Images:
Color negative film scanned and captured on Kodak five base (five resolution)
Photo CD disks,
with the highest resolution at 2048 x 3072 pixels.
Derivative Images:
Medium resolution images (512 x 768
pixels) were cropped to remove technical reference targets
and resaved in two formats and three sizes:
*JPEG 24 bit color low compression at high quality, 72 dpi, un-resized
*GIF 8 bit color thumbnails in two sizes -- mid-sized (c. 115 x 147 pixels)
and small (c. 58 x 74
pixels)
For more information on the technical aspects of this project, see the project narrative.
Melville J. Herskovits
Library of African Studies
Northwestern University
1970 Campus Drive
Evanston, IL 60208-2300
Reference Desk Phone: 847-467-3084
Office Phone: 847-491-7684
Fax: 847-467-1233
E-mail: africana@northwestern.edu
