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PNG
From JISC Standards Catalogue
- Entry
- PNG
- Area
- Image Standards
- Standard
- The PNG format offers lossless compression and support for colour depths up to 16 bits per channel. this format can also support transparency and additional alpha channels.
- Standardisation
- Information on ownership of standard.
- Versions
- 1.2
- Maturity
- This format is widely supported by image optimisation software but PNG transparency has only recently been recognised by Internet Explorer v6.
- Risk Assessment
- PNG was developed in part as a solution to the patent issue over LZW compression used in TIFF and GIF files. This patent has now expired and so the licence free advantage of PNG no longer exists.
- Take-up Elsewhere
- TIFF is still the dominant file format for image archives though PNG is growing in popularity. The Florida Centre for Library Automation (FCLA) and Libraries and Archives Canada both recommend PNG as an image format.
- Further Information
- Author
- Nigel Goldsmith, TASI
- Contributors
- Names of people who have contributed to the intellectual content of this page.
- Date Created
- 11 October 2006
- Version
- v1
