Digitization - Basic questions

  • View
    681

  • Download
    1

Embed Size (px)

DESCRIPTION

Things to consider before, during and after a digitization project in an historical institution. Lecture by Daniel Jeller on the 13th September 2011 in Volterra.

Text of Digitization - Basic questions

  • 1. DigitizationBasic questions

2. What is digitization? The translation of analogue data into digitaldata The process of taking a digital image ofsomething The creation of a digital representation ofsomething 3. Why digitize?? 4. Phases1) Initial reflections2) Preparation phase3) Metadata creation4) Actual digitization5) Postproduction6) 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 acompany? What will happen with the digital object, onceproduced? 6. Technical reflections Image format (TIFF, JPEG, JPEG2000,) Image quality (Resolution, Imagecompression) Equipment (Scanner vs. Digital Camera) Storage space (webhosting?) Long-term storage Filename (Human vs. Computer readable) 7. Scanner vs. Digital CameraScanner Digital Camera Variable resolution Constant resolution Lower speed High speed Mainly for flat objects Higher adjustability 8. Metadata for DigitizationWhy is this important? Every digital object has to be identifiable Most file systems only permit unique names Changes to filenames are difficult to makeafter digitization 9. Preparation Enough space Constant indirectlighting, no directsunlight Tables for preparation Enough power outlets 10. Digitization Speed vs. Quality Number of peopledepending on sourcematerial Storage of sourcesduring the night Delivery of new sources Quality control Image postprocessing 11. Source material Flat surface Book One sheet Possibly very large Possibly folded Possibly difficult to Possibly packaged open 12. File namingHuman readability Computer readabilityHHStA_AUR_16890201_r.jpg7c7a1400-dd12-11e0.jpg Easy to read and share Can be created quickly Has to be created by hand before digitization Easy to make mistakes Has to be copied, not Temptation to makeentered by handchanges later on Doesnt mean anything Can stay the sameregardless of metadata 13. Postproduction Image editing (cutting, compression,) Quality control (missing images) Preparation for storage (file organization)