RBDigital Magazines moving to OverDrive/Libby
On January 29, 2021 all magazines on RBDigital are moving to OverDrive and Libby.
- Unlimited access to all magazines, including the Economist.
- Up to three years of back issues for each title.
- You can still access Acorn and Great Courses through RBDigital.
Publish Date:
Tuesday, January 19, 2021 - 3:30pm
Image Digitization Standards

Staff digitizing images

Staff digitizing images
Master Image
- Tonal depth: 24-bit colour
- Format: TIFF
- Compression: Uncompressed
- Spatial Resolution: 1200 dpi
- Represents as closely as possible the information contained in the original
- Serves as long term source for derivative files
- Can serve as surrogate for the original
- High quality
- Used for creating high quality print reproductions
- Remains in a controlled environment, with limited use
Web Access Image
- Tonal depth: 24-bit colour
- Format: JPEG
- Compression: Compressed for speed of access
- Spatial Resolution:
- Resize images to 640 pixels in their longest dimension (either width or height)
- 96 dpi
- Used in place of master image for general web access
- Generally fits within viewing area of average monitor
- Reasonable file size for fast download time; does not require a fast network connection
- Acceptable quality for general research
Thumbnail Image
- Format: JPEG
- Compression: Compressed for speed of access
- Spatial Resolution:
- Resize originals to 150 pixels in their longest dimension (either width or height)
- 72 dpi
- Designed to display quickly online; allows users to determine whether they want to view Access Image
- Serves as a long term source for derivative files
Equipment Used for PreVIEW
- Scannx Book Scanner 6167 [Book Scanner and Document Capture]
- Epson Perfection V750 Pro [Flatbed Scanner]
- Kodak Perfect Page [Document Scanner]
- Plustek Optic Film 120 [Film Scanner – 35mm negatives, mounted slides, & 120mm medium format film]
- Colortrac Smart tlf Gxt T42 [Large Format Map Scanner]
- Digital Asset Management System – Canto Cumulus 8 Web Publisher Pro
- Storage Array Network (SAN): Dell EMC RAID storage System with Fibre
- Channel host interfaces and Fibre Channel disk drives
- Dell Graphic Workstations with 20” LCD Monitor