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Still Image
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Formats
| Content | Preference | Format | Format Use | Notes | |
|---|---|---|---|---|---|
| Preservation | Delivery | ||||
| Still Image | Preferred (in order of preference) | TIFF uncompressed in any color space supported by TIFF | X | TIFF has been commonly used at Harvard for digital master images, and is considered an archival format suitable for long-term preservation. For more information about the TIFF format see Adobe's TIFF resources | |
| JPEG 2000 JP2 profile with lossless compression | X | X | Some projects depositing content into the DRS have chosen to use JPEG 2000 for digital master images instead of TIFF. JPEG 2000 can offer storage savings - file sizes tend to be smaller and there is an opportunity to use the same file as the preservation and use copy. While JPEG 2000 is becoming more acceptable in the library community as a preservation format, there are still advantages to TIFF over JPEG 2000 for preservation. TIFF uncompressed is a simpler format internally and has more general tool support. For more information about JPEG 2000 see the JPEG 2000 website; rendered by Image Delivery Service (IDS) | ||
| TIFF with CCITT T.6 (Group 4) compression | X | ||||
| JPEG 2000 JP2 profile with lossy compression | X | X | Rendered by Image Delivery Service (IDS) | ||
| JPEG JFIF; TIFF with associated alpha component; TIFF with PackBits (lossless), LZW (lossless), Modified Huffman or Group 3 Fax compression | X | X | Rendered by Image Delivery Service (IDS) | ||
| GIF | X | X | Rendered by Image Delivery Service (IDS) | ||
| Accepted | JPEG (non-JFIF) | X | X | (suggested alternative: TIFF uncompressed or JPEG 2000 JP2 profile with lossless compression); rendered by Image Delivery Service (IDS) | |
| TIFF with JPEG (lossy) compression | X | (suggested alternative: TIFF uncompressed or JPEG 2000 JP2 profile with lossless compression) | |||
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Video
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Formats
Harvard Library Media Preservation Services will provide reformatting services to produce these formats.*
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