The Digitization Centre uses recognized file imaging standards to ensure a consistent level of quality for our digitized content. These standards are specific to the material being digitized, and to the scanning equipment used.
Imaging Standards
Post-processing file standards
- Save master files as TIFF with no compression.
- Save at 600 or 300 ppi, depending on the project and method of image capture. For the majority of cases we use 600 ppi.
- Save images as 1 bit bitonal, 8 bit grayscale, or 24 bit colour depending on the project. For the majority of cases we use 24 bit colour.
ATIZ workstations and Canon digital cameras
- Capture RAW images in the CR2 format.
- Derive master TIFFs from RAW files using the appropriate software (e.g. Adobe Photoshop) using 300 ppi, 24 bit colour, and the highest pixel dimensions available.
- Save the master TIFFs with no compression.
- If future access to the material may be restricted, or if the colour profile of the image is of special importance, save the RAW images as well.
- Be sure to keep the RAW viewing/manipulation software up to date.
TTI workstation
- Capture RAW images in the DNG format.
- Derive master TIFFs from RAW files using the appropriate software (e.g. Adobe Photoshop) using 600 ppi, 24 bit colour, and the highest pixel dimensions available.
- Save the master TIFFs with no compression.
- If future access to the material may be restricted, or if the color profile of the image is of special importance, save the RAW images as well.
- Be sure to keep the RAW viewing/manipulation software up to date.
Epson scanners and Fujitsu scanners
- Scan as a TIFF and save with no compression. For most cases, scan at 600 ppi and 24 bit colour.
- For scans of small photographs, upscale the image to 6000 pixels on the long edge.
nextScan FlexScan microform scanner
- Capture as Ribbon file in nextScan software.
- Output images as TIF Grayscale (uncompressed, 8-bit format) with a Sharpen filter set to 5×5:10.
Audio Standards
Post-processing file standards
Master files
WAVE or BWF, spoken language @ 44.1 kHz, music and ambient sounds @ 96 kHz, 24 bit
Access files
MP3, 44.1 KHz, 16 bit
Video Standards
Post-processing files standards
Master files
File wrapper: AVI or MOV
Encoding: Uncompressed 4:2:2 10 bit UYVY
Access files
File wrapper: MOV or MP4
Encoding: H.264, 640 x 360