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Digitization

melody avatar
melody
13 diapositives · 657 Views · Jul 23, 2014

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
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  1. Digitization Basic questions

  2. 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

  3. Why digitize? ?

  4. Phases • Initial reflections • Preparation phase • Metadata creation • Actual digitization • Postproduction • Long-term storage

  5. 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?

  6. 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)

  7. Scanner vs. Digital Camera Scanner Digital Camera Constant resolution High speed Higher adjustability • Variable resolution • Lowerspeed • Mainlyfor flat objects

  8. 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

  9. Preparation • Enough space • Constant indirect lighting, no direct sunlight • Tables for preparation • Enough power outlets

  10. 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

  11. Source material • Flat surface • One sheet • Possibly folded • Possibly packaged • Book • Possibly very large • Possibly difficult to open

  12. 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

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