DjVu
Encyclopedia : D : DJ : DJV : DjVu
DjVu (pronounced deja-vu) is a proprietary computer file format designed primarily to store scanned images. It features advanced technologies such as image layer separation, progressive loading, arithmetic coding, and lossy compression for bitonal images, allowing for high quality, readable images to be stored in a minimum of space.
Progressive loading makes the format ideal for images served over the internet. DjVu has been promoted as an alternative to PDF, actually outperforming PDF on most scanned documents. This has led to its widespread use in distributing math books on file sharing networks. Like PDF, DjVu can contain an OCRed text layer, making it easy to perform cut and paste operations.
The DjVu technology was originally developed by Yann Le Cun, Léon Bottou, Patrick Haffner, and Paul G. Howard at AT&T Laboratories in 1996. DjVu is a free file format. The file format specification is published as well as source code for the reference library. The ownership rights to the commercial development of the encoding software have been transferred to different companies over the years, including AT&T and LizardTech. The original authors maintain a GPLed implementation named "[DjVuLibre]".
In 2002 the DjVu file format was chosen by the Internet archive as the format in which its [Million Book Project] provides scanned public domain books online (along with TIFF and PDF).
DjVu format will be used by the One Laptop per Child project in order to easily supply existing paper books in an eBook format. The advantage of DjVu is that it is highly compressed and it does not require any font support. [link]
External links
- [ATT patent 6058214] (1999)
- [DjVuZone.org], non-commercial resource about DjVu
- [Creating DjVu from almost any format online]
- [DjVuLibre], open source DjVu viewer, browser plug-in, and tools
- [LizardTech, DjVu Browser Plug-in], free, proprietary viewer
- [LizardTech, Technical papers on DjVu]
- [High Quality Document Image Compression with DjVu] (434KB), ([ps.gz], 1.9MB)
- :[Bottou98 citations] (Journal of Electronic Imaging, vol. 7, no. 3)
- [MIME image/vnd.djvu] (IANA registration, 2002)
- [WinDjView & MacDjView] (open source)
- [Evince] open source Linux viewer for DjVu, PDF, PS, TIFF and DVI.
- [DjView for Qtopia] (open source, for Zaurus)
- [Facsimile Books & other digitally enhanced Works from: THE UNIVERSITY OF GEORGIA LIBRARIES] (searchable DjVu format)
- [DjVu vs PDF] comparison / challenge published by [Planet DjVu]
- [List of DjVu resources]
- [DjVu on Wiki*edia]
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