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Digitization - PowerPoint PPT Presentation


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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. Initial reflections Preparation phase

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digitization

Digitization

Basic questions

what is digitization
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
phases
Phases
  • Initial reflections
  • Preparation phase
  • Metadata creation
  • Actual digitization
  • Postproduction
  • Long-term storage
initial reflections
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
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 vs. Digital Camera

Scanner

Digital Camera

Constant resolution

High speed

Higher adjustability

  • Variable resolution
  • Lowerspeed
  • Mainlyfor flat objects
metadata for digitization
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
Preparation
  • Enough space
  • Constant indirect lighting, no direct sunlight
  • Tables for preparation
  • Enough power outlets
digitization1
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
Source material
  • Flat surface
  • One sheet
  • Possibly folded
  • Possibly packaged
  • Book
  • Possibly very large
  • Possibly difficult to open
file naming
File naming

Human readability

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

“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
postproduction
Postproduction
  • Image editing (cutting, compression,…)
  • Quality control (missing images)
  • Preparation for storage (file organization)