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January 8, 2009 Califa Digital Symposium
Imaging and Technical Issues Digitizing Adding Metadata Collection Management Archiving and Maintainability Find, display, print
January 8, 2009 Califa Digital Symposium
Capture
January 8, 2009 Califa Digital Symposium
Imaging and Technical Issues Digitizing
Determine media/object concerns Resolution Bit depth File Format
January 8, 2009 Califa Digital Symposium
Imaging and Technical Issues Digitizing
Determine media/object concerns Original or surrogate (halftone) Physical size of the analog object Equipment limitations Bindings, mounts, casings The area of interest (AOI)
January 8, 2009 Califa Digital Symposium
Imaging and Technical Issues Digitizing
Resolution Determine size of finest details Set sufficient to capture finest details Enough is enough Get enough on the first shot
January 8, 2009 Califa Digital Symposium
Imaging and Technical Issues Digitizing
Bit depth 1bit 2 colors (black/white)
4bit 16 colors (palate)
8bit 256 colors (palatte)
Humans distinguish 10 million colors 24bit 16.7 million colors (8bits per rgb channel)
January 8, 2009 Califa Digital Symposium
Imaging and Technical Issues Digitizing
File Format Native/Raw of the device Open known standard format Ability to add metadata into the file TIFF, JPEG, PDF, JPEG 2000, PNG TIFF just TIFF
January 8, 2009 Califa Digital Symposium
One size does not fit all.
600dpi600dpi
7.6 megapixel
30003000 lines lines
35mm SLIDE
4x4 negative
8x10 print
24x36 Poster
E-Size Engineering Drawing
150dpi
240ppi
Capture
January 8, 2009 Califa Digital Symposium
Inform
January 8, 2009 Califa Digital Symposium
Imaging and Technical Issues Adding Metadata
Descriptive (cataloging/keywords) Content/Folksonomy/Thesauri
Administrative (rights/management) Technical (format/resolution) Structural (page/chapter/volume)
January 8, 2009 Califa Digital Symposium
Imaging and Technical Issues Adding Metadata
External storage Must maintain links over time
Internal storage Travels with the digital object Can recreate an external database
January 8, 2009 Califa Digital Symposium
Imaging and Technical Issues Collection Management
Create collection level metadata Augment object metadata Organize for patron use
January 8, 2009 Califa Digital Symposium
Imaging and Technical Issues Archiving and Maintainability
Standardized formats (migration)
Full resolution images (eyes on the prize)
Use of checksums (robotic review)
January 8, 2009 Califa Digital Symposium
Find
January 8, 2009 Califa Digital Symposium
Imaging and Technical Issues Find, display, print
Indexing Web distribution High quality prints
January 8, 2009 Califa Digital Symposium
John Sarnowski
Director
608.566.5966
www.ResCarta.org
