digitization basic questions. what is digitization? the translation of analogue data into digital...
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Digitization
Basic questions
What is digitization?
• The translation of analogue data into digital data
• The process of taking a digital image of something
• The creation of a digital representation of something
Why digitize?
?
Phases
1) Initial reflections2) Preparation phase3) Metadata creation4) Actual digitization5) Postproduction6) Long-term storage
Initial reflections
• What do I want to digitize?• Why do I want to do it?• Do I already have the necessary metadata?• What safety precautions are necessary?• Do I want to digitize myself or hire a
company?• What will happen with the digital object, once
produced?
Technical reflections
• Image format (TIFF, JPEG, JPEG2000,…)• Image quality (Resolution, Image
compression)• Equipment (Scanner vs. Digital Camera)• Storage space (webhosting?)• Long-term storage• Filename (Human vs. Computer readable)
Scanner vs. Digital Camera
Scanner• Variable resolution• Lower speed• Mainly for flat objects
Digital Camera• Constant resolution• High speed• Higher adjustability
Metadata for Digitization
Why is this important?• Every digital object has to be identifiable• Most file systems only permit unique names• Changes to filenames are difficult to make
after digitization
Preparation
• Enough space• Constant indirect
lighting, no direct sunlight
• Tables for preparation• Enough power outlets
Digitization
• Speed vs. Quality• Number of people
depending on source material
• Storage of sources during the night
• Delivery of new sources• Quality control• Image postprocessing
Source material
• Flat surface• One sheet• Possibly folded• Possibly packaged
• Book• Possibly very large• Possibly difficult to
open
File naming
Human readability“HHStA_AUR_16890201_r.jpg”
• Easy to read and share• Has to be created by hand• Easy to make mistakes• Temptation to make
changes later on
Computer readability„7c7a1400-dd12-11e0.jpg“
• Can be created quickly before digitization
• Has to be copied, not entered by hand
• Doesn’t mean anything• Can stay the same
regardless of metadata
Postproduction
• Image editing (cutting, compression,…)• Quality control (missing images)• Preparation for storage (file organization)
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