Victoria Day Closure
All HPL branches are closed on Sunday, May 19, and Victoria Day, Monday, May 20. Bookmobile, Extended Access, and Study Hall services are unavailable. Regular service hours resume on Tuesday, May 21.
Publish Date:
Wednesday, May 8, 2024 - 10:00am
Image Digitization Standards
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