Reformatting Standards

Capture Standards

Flatbed Scanning

  • 300 dpi for text-based material (EFacs)
  • For photographic material aim for 2000–5000 pixels on the longest edge of the images. This generally means:
    • 300 dpi for material larger than 5″ x 7″
    • 600 dpi for material smaller than 5″ x 7″
  • 24-bit color
  • All adjustments on the Epson Scan utility are unchecked.
  • Histogram settings are created for each machine based on performance assessment using the GoldenThread Analysis software
  • TIFF images

High Speed Scanning

  • 300 dpi (color/grayscale) or 600 dpi (bitonal)
  • 24-bit color, 8-bit grayscale, or 1-bit bitonal depending on material
  • TIFF images

Overhead Reprographic Scanning – Access-level projects

  • 300 – 600 dpi depending on material size
    • 300 dpi for material larger than 5″ x 7″
    • 600 dpi for material smaller than 5″ x 7″
  • GoldenThread device target captured at the beginning of each session (project) and day
  • RAW image workflow and images exported to TIFF via CaptureOne

Overhead Reprographic Scanning – Preservation-level projects

  • 400 dpi
  • GoldenThread device target captured at the beginning of each session (project) and day
  • GoldenThread object target captured with each page depending on project
  • RAW image workflow and images exported to TIFF via CaptureOne

Book Copy System Scanning – Preservation-level capture

  • 400 dpi
  • GoldenThread device target captured at the beginning of each session (project) and day
  • GoldenThread object target captured with each page depending on project
  • RAW image workflow and images exported to TIFF via CaptureOne

Slide Scanning

  • 4000 dpi

Derivative Standards

Electronic Facsimile (EFacs) model derivatives (JPEG images)
Our current strategy is based primarily on relative resolution. The smallest derivative, however, is sized according to pixel length along its longest dimension. The derivative creation process is controlled by an AppleScript script (sending commands to the Finder and Adobe Photoshop). File names and formats are arbitrary—they will be indicated in the metadata. There is a specified directory structure that the derivatives need to be placed into (stored within a folder named with the Size ID). There is no indicator of the derivative size in the file names.

 Derivative Size  Size ID  Longest dimension  Resolution
 Thumbnail  thumb  150 pixels  —
 Small S 600 pixels
 Medium M 80 dpi
Large L 120 dpi
 Extra Large XL 200 dpi

Multimedia (MmBib) model derivatives (JPEG images)
Derivatives are sized based on a specific number of pixels on the longest dimension of the image. The derivative creation process is controlled by an AppleScript script (sending commands to the Finder and Adobe Photoshop). File names are consistently generated according to the media information in the project’s database and our local standard for size naming. That is, the media ID (plus sequence number, if any) is followed by the one-letter size code, followed by the file extension (usually “.jpg”).

 Derivative Size  Size Code  Longest pixel dimension
 icon  i  100
 thumb  t  150
 reference  r  300
 large  l  720
 xlarge  x  1500

Additional documentation

Electronic Facsimile Derivatives Appendix (PDF)

Multimedia Derivative Appendix (PDF)