View the Digitization Specifications and Guidelines used for this project.
The group of negatives scanned for this project (the majority appearing on glass plate substrates) were captured with the software Epson Scan v. 3.01A, using the Epson Perfection V750 Pro flatbed scanner. The black and white negatives were captured in 16-bit grayscale .tif files at an archival size equivalent to those recommended in the National Archives and Records Administration's manual, Technical Guidelines for Digitizing Archival Materials for Electronic Access: Creation of Production Master Files – Raster Images
All archival images were cropped to leave film borders and glass plate edges intact. The scans were corrected to make visible as much of the information from the original negatives as possible. Manual dust and scratch removal was carried out when this noise interfered with image viewing. After the tone and texture correction, all images were converted to 8-bit Grayscale and saved as .tif files.
Our database consists of a MySQL database driven by Ruby on Rails. Derivative images for web presentation are generated automatically from the master image in three web-friendly sizes. Technical metadata is captured from the master image and uploaded to the database. Images are stored on the file system with links maintained in the database.