The following table contains the standards for resolution and bit depth that LAC typically uses in digitization projects. The material is organized by type of source material being digitized. These standards are guidelines rather than rules; the actual settings used in a specific project may vary depending on the condition of the material and the intended use of the digital images. In every case, the objective is to have a master image which is a faithful reproduction of the original document, and an access version in which all the essential informational value of the original is readable.
| Master Copy | Access Copy | |
|---|---|---|
| Books | 300 dpi 8-bit colour (sometimes bitonal or greyscale) JPG |
300 dpi bitonal (with some elements in greyscale or colour) PDF with OCR |
| Serials | 300 dpi 24-bit Adobe RGB (1998) TIFF |
72 dpi colour or greyscale JPG or PDF with OCR |
| Government publications and reports | 300 dpi 24-bit Adobe RGB (1998) TIFF |
72 dpi colour or greyscale JPG or PDF with OCR (when possible) |
| Newspapers (microfilm) | 150 dpi 8-bit greyscale TIFF |
150 dpi greyscale JPG or PDF with OCR |
| Theses (microfiche) | 150 dpi 8-bit greyscale TIFF |
150 dpi greyscale JPG or PDF with OCR |
| Music recordings | 96 kHz 24-bit BWF |
MP3 |
| Spoken word recordings | 96 kHz 24-bit BWF |
MP3 |
| Film | Not yet defined | H.264 |
| Video and TV broadcast | NTSC encoding, Motion JPEG2000 at 50Mbs employing lossless reversible compression 4 audio channels, 8 or 10 bits video resolution |
H.264 |
| Maps | 6000 to 8000 pixels (longside) 24-bit Adobe RGB (1998) TIFF |
600-1000 pixels (longside) 72 dpi JPG, PDF or JPG 2000 |
| Documentary art, photography, portraiture | Varies depending on format and scanner, ranges 6000 to 8000 pixels (longside), between 300 dpi to 4000 dpi 24-bit Adobe RGB (1998) TIFF |
600-1000 pixels (longside) 72 dpi or 150 dpi colour or greyscale JPG |