Difference between revisions of "SUNScholar/Digitisation"
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==Objectives== | ==Objectives== | ||
| − | #The objective is to | + | # The next objective is to create the '''best possible copy of the original media in a digital format''', be it print or old digital storage containers, using digital conversion equipment. |
| − | |||
The resultant digital object must adhere to the following: | The resultant digital object must adhere to the following: | ||
Revision as of 17:32, 11 July 2011
Contents
Objectives
- The next objective is to create the best possible copy of the original media in a digital format, be it print or old digital storage containers, using digital conversion equipment.
The resultant digital object must adhere to the following:
- Use an uncompressed bitstream for storage.
- Use open digital formats with no patent liability and which have open published standards.
For more information, see: http://en.wikipedia.org/wiki/Digitizing
Library Policy re Digitization
Unfortunately the library does not have sufficient capacity at this stage to provide digitization services. Digitization conducted by the library is mainly to address internal needs. We can - however - provide advice, some basic training or share best practices when required.
Please go ahead as follows:
- Dept. purchases its own scanner equipment and the necessary software, and appoint someone to do the scanning if volume requires such a person.
- The dept. approach an external institution to assist. Please see below.
Digitisation Equipment and Services
Digital Formats
Digitisation Guidelines
| Media type | Resolution | Bit depth | Enhancements Allowed |
|---|---|---|---|
| Printed text | 300 dpi | Bitonal | Sharpening, descreening, cropping, deskewing, despeckling |
| Rare/ damaged printed text | 400 dpi | 8-gray or 24 colour | Contrast stretching; Minimal adjustments for tone and colour |
| Book illustrations | 400 - 600 dpi with enhancement | 8-gray or 24 colour; Bitonal | Contrast stretching; Minimal adjustments for tone and colour; Descreen/ rescreen, sharpen |
| Manuscripts | 300 - 500 dpi with enhancement | 8-gray or 24 colour | Contrast stretching; Minimal adjustments for tone and colour |
| Maps and other oversized items | 300 - 400 dpi | 8-gray or 24 colour | Contrast stretching; Minimal adjustments for tone and colour |
| Graphic Art | 400 - 600 dpi | 8-bit/ channel internal reduction | Contrast stretching; Minimal adjustments for tone and colour |
- Please note
- All archival material to be digitised in tiff format
- Tiff copy together with derivated png or any additional copies to be submitted to SUNScholar
- Document provenance metadata:
- dc.description.provenance e.g. Original scanned in at 600 dpi, 100% DigiBook 10000 RGB colour, downsized to 840 pixels in width, resolution 250. Web version done automatically by PhotoShop 7 software. Downloading time approx. 26 seconds. Date done March - April 2007.
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