High Speed Scanning
Overhead Reprographic Scanning – Access-level projects
Overhead Reprographic Scanning – Preservation-level projects
Book Copy System Scanning – Preservation-level capture
Electronic Facsimile (EFacs) model derivatives (JPEG images)
Our current strategy is based primarily on relative resolution. The smallest derivative, however, is sized according to pixel length along its longest dimension. The derivative creation process is controlled by an AppleScript script (sending commands to the Finder and Adobe Photoshop). File names and formats are arbitrary—they will be indicated in the metadata. There is a specified directory structure that the derivatives need to be placed into (stored within a folder named with the Size ID). There is no indicator of the derivative size in the file names.
|Derivative Size||Size ID||Longest dimension||Resolution|
|Extra Large||XL||—||200 dpi|
Multimedia (MmBib) model derivatives (JPEG images)
Derivatives are sized based on a specific number of pixels on the longest dimension of the image. The derivative creation process is controlled by an AppleScript script (sending commands to the Finder and Adobe Photoshop). File names are consistently generated according to the media information in the project’s database and our local standard for size naming. That is, the media ID (plus sequence number, if any) is followed by the one-letter size code, followed by the file extension (usually “.jpg”).
|Derivative Size||Size Code||Longest pixel dimension|