Andrew Ford
(andrew@icarus.demon.co.uk)
17th September 1994
Images of parts of the Beowulf manuscript are scanned in 24-bit colour, both under visible and ultraviolet light. These images may be of entire pages, or just single words or letters. The resulting image files are huge: at a maximum size of 2320 by 3072 pixels each image takes up about 20-25 MB, however they can reveal even more information than would physical examination of the original manuscripts, for example allowing the detection of alterations to the manuscripts and revealing letters that have been obscured by repairs to eighteenth century fire damage.
The Library is experimenting with the use of Mosaic and the World Wide Web as a front end to provide initial access to materials in the Library's Reading Rooms in London. Mosaic was chosen as a powerful, simple-to-use interface suitable for users who may not be computer-literate. By use of off-line image preparation, server-side scripts performing on-the-fly image manipulation and caching of images, users are able to search quickly for detail in the images, while the hypertext features of the Web allow cross references to background material to be presented.