Digitization Programmes

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Digitization Programmes

• National Library of the Czech Republic
• Adolf Knoll
• adolf.knoll_at_nkp.cz

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History

• Digitization started in 1992-93
• Routine production in 1996
• Two national programmes
• Memoriae Mundi Series Bohemica (direct scanning
  manuscripts, old printed books, maps, )
• Kramerius (preservation microfilming
  digitization acid paper materials esp.
  newspapers and other periodicals

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Coverage

• Limited access to rare materials
• Endangered by frequent use
• Endangered by deterioration of carriers,
  corrosion of writing and printing materials,
  fading colours, etc.
• Special case brittle acid paper
• Need to preserve through offering copies

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National programmes

• Parts of the Public Information Services of
  Libraries programme
• Grant system under the Ministry of Culture since
  2000
• Call for proposals, grant committees, the
  applicants can require up to 70 of cost
• Open access application of recommended standards

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Production

• MMSB
• Yearly ca. 110,000 pages digitized
• Altogether
• 400,000 pages MSS
• 140,000 pages old prints
• Several hundreds of maps
• 3 devices for direct digitization (cameras and
  camera scanners)

• Kramerius
• Yearly up to 400,000 pages digitized and up to
  1,000,000 filmed
• Altogether
• Ca. 800,000 pages
• Sound recordings of interviews
• 2 microfilm scanners

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Metadata framework

• High readability
• Standard platform
• Enhanced communication
• SGML and any applications thereof
• TEI, Czech DOBM
• XML

• These features enable
• Direct access
• Indexing of metadata in sophisticated access
  tools
• ManuFreT (local)
• AiP SAFE (Internet)
• Re-export into production formats and conversion
  into other formats

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Metadata framework
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Visual data

• Stored in graphic formats for
• preview (GIF, JPEG)
• access (JPEG, limited TIFF/G4)
• archival storage (JPEG, limited TIFF/G4)
• Optimized for access
• production processing (optimal parameters for
  JPEG)
• access processing (on-the-fly DjVu conversion,
  DjVu)
• application of multiresolution formats (MrSID)

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Access data user side

• transfer
• modem 56 kbit/s 7 KB per 1 second
• JPEG 2.1 MB 300 seconds 5 minutes
• DjVu 140 KB 20 seconds
• well-comparable quality
• decompression problems
• standard, progressive, or successive display
• multiresolutional display

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Access data provider side

• acceptable quality for established purpose
• optimized resolution
• optimized lossy compression quality factors
• new methods
• Mix Raster Content approach (image layers
  compressed separately and merged)
• wavelet encoding scheme
• JBIG-similar encoding black-and-white scheme
• Multiresolution approach (several resolution
  stored in one image file)

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DCT
MRC wavelet
lossless
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Archiving of and access to reformatted documents
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