SUNScholar/Digitisation

Objectives

The 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:

1. Use an uncompressed bitstream for storage.
2. Use open digital formats with no patent liability and which have open published standards.

For more information, see: http://en.wikipedia.org/wiki/Digitizing

Guidelines for scanners

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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