Digitization Standards and Tips

Documentation from the Digital Library Center, University of Tennessee Libraries

http://diglib.lib.utk.edu/dlc/techdocs/UT_DigitizationStandards2004.pdf

Scanning Standards used for Volunteer Voices (the basics)

• Scan items at 400ppi on long edge (refer to UT Digitization Standards--link above--for specifics based on object type)
• Save as .tif file
• Use filename as detailed on Filenaming Schemes pages

Image sizes/resolution for web delivery

• Primary Image
  • 800 pixel max on the longest dimension
  • Quality level = 80
• Thumbnail Image
  • Max width of 170; max height 250
  • If one dimension is < 100 pixels, the other must be >= 150
• Mini-thumbs (for cross-format searching)
  • 170 pixel max on the longest dimension
• OCR’d Text
  • Each should be named the same as the tif page from which it was created – but with a different extension. .jpg for each of the images (put in directories: JPEG thumbs minithumbs) And .txt for the OCR’d text (put in directory: ocr ) These subdirectories should be created in the directory of the parent object, such as in 00, 01, etc.

Images - required derivatives to deliver for web production

• 00: (image files, one per metadata record) jpegs, thumbs, minithumbs
• 01: (image files, several per metadata record) jpegs, thumbs, minithumbs only for the first page in each sequence (files ending in 0001.tif)
• 02: (text files to be OCR’d) jpegs, OCR text files
• 03: (text files which have been transcribed: there should be .txt files here already for each page) jpegs
• 04: (these are text requiring transcription; how delivered? Until decided, provide all that may be needed) jpegs, thumbs, minithumbs only for the first page in each sequence (files ending in 0001.tif)