Raster images

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Preservation Format

Uncompressed TIFF for all but JPEG2000 and PNG, which will be retained in their original formats.

Access Format

JPEG

Normalization tool

ImageMagick

Comments

• Florida Digital Archive has "high confidence level" in ability to preserve uncompressed TIFF files: FDA Recommended Data File Formats.
• "TIFF 6.0 has been commonly used at Harvard for digital master images, and is considered an archival file format suitable for long-term preservation." Harvard University Library, File Formats and Guidelines
• Library of Congress considers TIFF 6.0 to be "one of the preferred formats for bitmapped images." Library of Congress Sustainability of Digital Formats: TIFF, Revision 6.0
• Library and Archives Canada considers TIFF to be a recommended format for still images: Guidelines for Computer File Types, Interchange Formats and Information Standards
• If images are ingested in PNG or lossless JPEG 2000 format they will be left in those formats rather than normalized to TIFF.

More information

• Analysing the Impact of File Formats on Data Integrity. Proceedings of Archiving 2008. Bern, Switzerland. Retrieved from http://old.hki.uni-koeln.de/people/herrmann/forschung/heydegger_archiving2008_40.pdf (via Richard Wright of the BBC).
• Is JPEG 2000 a Preservation Risk? The Signal Digital Preservation Blog, Library of Congress, http://blogs.loc.gov/digitalpreservation/2013/01/is-jpeg-2000-a-preservation-risk/.