Digital Imaging - pulibrary/BlueMountain GitHub Wiki
Blue Mountain adheres to standards elaborated by the Federal Agencies Digitization Guidelines Initiative (FADGI)[fn:1], whose Still Image Working Group produced a document entitled Technical Guidelines for Digitizing Cultural Heritage Materials in 2010. These guidelines are available online at the following URL: http://www.digitizationguidelines.gov/guidelines/digitize-technical.html.
Archival images are captured in 24-bit RGB and digitally rendered at varying resolutions to produce a uniform long dimension of 7,200 pixels, then stored as uncompressed TIFF files with a large, non-proprietary color profile (Pro Photo RGB). The homogenization of the archival files to a long dimension of 7,200 pixels allows us to produce uniform derivative images rapidly and estimate our storage needs more accurately.
Most of the materials are photographed in Princeton University Library’s Digital Photography Studio (a detailed description of this facility, its equipment, and practices can be found in Appendix Y). When original materials are owned by an extramural institution reluctant to send materials offsite, Princeton’s head digital photographer works closely with photographers there to insure Blue Mountain’s standards are followed.
[fn:1] FADGI maintains a website at http://www.digitizationguidelines.gov/.