Image Specifications / Quality Standards

• Archived Digital Images (per best practices)

  • Color photos and documents:
    • Should be scanned at minimum 600 dpi for archival purposes
    • Color space should be sRGB, at least 24 bit true-color. 8 bits per channel is preferred.
    • Archival files should be in TIFF format, encoded with no compression or (where available) a lossless compression algorithm.
  • Black and white documents with gray tones, or black and white photos:
    • Should be scanned at a minimum of 400 dpi.
    • Color space should be grayscale. RGB is acceptable, but contributes nothing to pure grayscale images and only increases file size.
    • Archival files should be in TIFF format. Archival files should be in TIFF format, encoded with no compression or (where available) a lossless compression algorithm.
  • Black and white documents with pure text:
    • Should be scanned at a minimum of 400 dpi.
    • Color space should be 2 bit color (black and white), but should be converted to grayscale if the documents are to be digitally resized.
    • TIFF format for archived images.