Difference between revisions of "Raster images"
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| − | [[Main Page]] > [[Documentation]] > [[ | + | [[Main Page]] > [[Documentation]] > [[Format policies]] > Raster images |
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==Preservation Format== | ==Preservation Format== | ||
| − | Uncompressed TIFF | + | Uncompressed TIFF for all but JPEG2000 and PNG, which will be retained in their original formats. |
==Access Format== | ==Access Format== | ||
| Line 15: | Line 15: | ||
==Comments== | ==Comments== | ||
*Florida Digital Archive has "high confidence level" in ability to preserve uncompressed TIFF files: [http://www.fcla.edu/digitalArchive/formatInfo.htm FDA Recommended Data File Formats]. | *Florida Digital Archive has "high confidence level" in ability to preserve uncompressed TIFF files: [http://www.fcla.edu/digitalArchive/formatInfo.htm 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." [http://hul.harvard.edu/ois/digpres/guidance.html Harvard University Library, File Formats and Guidelines] | ||
*Library of Congress considers TIFF 6.0 to be "one of the preferred formats for bitmapped images." [http://www.digitalpreservation.gov/formats/fdd/fdd000022.shtml Library of Congress Sustainability of Digital Formats: TIFF, Revision 6.0] | *Library of Congress considers TIFF 6.0 to be "one of the preferred formats for bitmapped images." [http://www.digitalpreservation.gov/formats/fdd/fdd000022.shtml 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: [http://www.collectionscanada.gc.ca/government/products-services/007002-3017-e.html Guidelines for Computer File Types, Interchange Formats and Information Standards] | *Library and Archives Canada considers TIFF to be a recommended format for still images: [http://www.collectionscanada.gc.ca/government/products-services/007002-3017-e.html 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. | *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/. | ||
__NOTOC__ | __NOTOC__ | ||
Latest revision as of 16:16, 13 February 2013
Main Page > Documentation > Format policies > Raster images
Significant characteristics of raster images[edit]
Preservation Format[edit]
Uncompressed TIFF for all but JPEG2000 and PNG, which will be retained in their original formats.
Access Format[edit]
JPEG
Normalization tool[edit]
ImageMagick
Comments[edit]
- 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[edit]
- 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/.