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DjVuLibre |
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Features |
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Doc***entation |
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License |
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Credits |
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Links |
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DjView4 |
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GSDjVu |
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Download the Latest Version DjVuLibre includes a standalone viewer, a browser plug-in (for Mozilla, Firefox, Konqueror, Netscape, Galeon, and Opera), and command line tools (decoders, encoders, utilities). DjVuLibre works under Unix with X11. Native plugins for MSWindows and MacOSX are freely available from LizardTech Inc.. The new portable viewer djview4 is available as a separate package. Latest Release: version 3.5.27 released 2015-02-12. Check out the full download page for previous versions. SourcePackages SourceTAR.GZdjvulibre-3.5.27.tar.gz Binary Packages Fedora/RedhatAvailable from Fedora. SuseAvailable from OpenSuse. DebianAvailable from Debian (apt-get!) UbuntuAvailable from Ubuntu (apt-get!) OS/2(x86)Available on Hobbes Windows(x86)Available on Sourceforge MacOS(x86,ppc)Available on Sourceforge Related Projects DjView4 An improved DjVu viewer for (unix, windows, mac). JavaDjVu A Java cla*** for viewing DjVu files without plugin. DjvuDigital A Ghostscript based tool for converting PS or PDF files into DjVu files. See DjVu.org for more DjVu software. What is DjVu? DjVu (pronounced "déjà vu") a set of compression technologies, a file format, and a software platform for the delivery over the Web of digital doc***ents, scanned doc***ents, and high resolution images. DjVu doc***ents download and display extremely quickly, and look exactly the same on all platforms with no compatibility problems due to fonts, colors, etc. DjVu can be seen as a superior alternative to PDF and PostScript for digital doc***ents, to TIFF (and PDF) for scanned bitonal doc***ents, to JPEG and JPEG2000 for photographs and pictures, and to GIF for large palettized images. DjVu is the only Web format that is practical for distributing high-resolution scanned doc***ents in color. No other format comes close. Typical DjVu file sizes are as follows: bitonal scanned doc***ents: 5 to 30KB per page at 300dpi (3 to 10 times smaller than PDF or TIFF) color scanned doc***ents: 30 to 100KB per page at 300dpi (5 to 10 times smaller than JPEG). photos: 2 times smaller than JPEG, about the same as JPEG-2000, but the decoder/renderer is progressive and has minimal memory requirements. palettized images: 2 times smaller than GIF (up to 10 times if it's mostly text). digital (non scanned) doc***ents: between 1 and 3 times smaller than PDF or gzipped PS (depending on the amount of pictures), but rendering, page flipping, zooming, panning are incomparably faster, and the image quality on screen desplays is much better (antialiased text, etc). More importantly, all DjVu images render very quickly and can be smoothly zoomed and panned. Pages of a doc***ent can be turned instantly, with no annoying delay. DjVu is used by hundreds of academic, commercial, governmental, and non-commercial web sites around the world to distribute scanned doc***ents, digital doc***ents, and high-resolution photos. A short technical description of DjVu is available here. Demos, and general information about DjVu can be found at DjVuZone.org, or at LizardTech.com. DjVu was originally developped at AT&T Labs-Research. In March 2000, AT&T sold DjVu to LizardTech Inc. who now distributes Windows/CE/Mac plug-ins, and commercial encoders. DjVuLibre is an open source implementation of DjVu. See the credits/history page for more details. What's inside DjVu? A short technical description of DjVu is available here. In short, DjVu is a multipage doc***ent format that can use a number of different coder/decoders (codecs) to compress the individual chunks that compose an images or a page. In fact, DjVu is really four compression techniques wrapped into one format: DjVuPhoto (aka IW44): A progressive, wavelet-based lossy compression format for continuous-tone images (i.e. photos and pictures). DjVuBitonal (aka JB2): A lossless or lossy compression technique for bitonal (black & white) or palettized images that is particularly effective on images with repeated shapes (such as doc***ents images where the same character appears many times in the doc***ent). DjVuDoc***ent: A technique for scanned color doc***ent that separates images into a foreground layer that contains the text and line drawings, and a background layer that contains the pictures and background textures. The foreground is encoded with DjVuBitonal and the Background with DjVuPhoto. BZZ: A general-purpose data compression technique similar to bzip2. Bzz is used to compress searchable text layers and other metadata in DjVu doc***ents. DjVu can be seen as nicely complementing PNG and MNG (which, unlike DjVu are lossless formats) in the areas of doc***ent image compression and lossy photo compression. DjVuPhoto is a bit older, but similar in spirit to JPEG-2000. It is on a par with JPEG-2000 in terms of image quality and file size, but it compares favorably in terms of rendering time and memory requirements. DjVuBitonal is better than MMR/GroupIV (used by PDF, TIFF, and most fax machines) by about a factor of 3 to 10. It is also better than the emerging standard JBIG2 by about 20%. What is DjVuLibre? In an effort to promote DjVu as a Web standard, LizardTech's management was enlightened enough to release the reference implementation of DjVu under the GNU GPL in October 2000. DjVuLibre (pronounced like the French "déjà vu libre", which means free DjVu), is an enhanced version of that code maintained by the original inventors of DjVu. It is compatible with version 3.5 of LizardTech's DjVu software suite. DjVuLibre includes: A standalone DjVu viewer for Unix under X11 (based on the Qt library). A browser plugin that works with most Unix browsers, including: Netscape-4.x, Netscape-6.x, Mozilla, Galeon, Konqueror, and Opera. A full-fledged wavelet-based compressor for pictures. A simple compressor for bitonal (black and white) scanned pages. A very simple compressor for scanned color pages. A compressor for palettized images (a la GIF/PNG). A full set of utilities to manip****te and a***emble DjVu images and doc***ents. A set of decoders to convert DjVu to a number of other formats. An up-to-date version of the C++ DjVu Reference Library Windows and Mac versions of the viewer/plug-in, free Windows compressors, and high-end commercial compressors and OCR engines are available from LizardTech Inc.. The compressors provided here are slower, produce larger files (sometimes with lower image quality) than the commercial compressors, but they do the job. For those who like quick solutions without having to install software, a variety of free web-based conversion services are also available, including Any2DjVu and Bib2Web. |
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djview4 |
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separate package |
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DjView4 |
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DjvuDigital |
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What is DjVu? DjVu (pronounced "déjà vu") a set of compression technologies, a file format, and a software platform for the delivery over the Web of digital doc***ents, scanned doc***ents, and high resolution images. DjVu doc***ents download and display extremely quickly, and look exactly the same on all platforms with no compatibility problems due to fonts, colors, etc. DjVu can be seen as a superior alternative to PDF and PostScript for digital doc***ents, to TIFF (and PDF) for scanned bitonal doc***ents, to JPEG and JPEG2000 for photographs and pictures, and to GIF for large palettized images. DjVu is the only Web format that is practical for distributing high-resolution scanned doc***ents in color. No other format comes close. Typical DjVu file sizes are as follows: bitonal scanned doc***ents: 5 to 30KB per page at 300dpi (3 to 10 times smaller than PDF or TIFF) color scanned doc***ents: 30 to 100KB per page at 300dpi (5 to 10 times smaller than JPEG). photos: 2 times smaller than JPEG, about the same as JPEG-2000, but the decoder/renderer is progressive and has minimal memory requirements. palettized images: 2 times smaller than GIF (up to 10 times if it's mostly text). digital (non scanned) doc***ents: between 1 and 3 times smaller than PDF or gzipped PS (depending on the amount of pictures), but rendering, page flipping, zooming, panning are incomparably faster, and the image quality on screen desplays is much better (antialiased text, etc). More importantly, all DjVu images render very quickly and can be smoothly zoomed and panned. Pages of a doc***ent can be turned instantly, with no annoying delay. DjVu is used by hundreds of academic, commercial, governmental, and non-commercial web sites around the world to distribute scanned doc***ents, digital doc***ents, and high-resolution photos. A short technical description of DjVu is available here. Demos, and general information about DjVu can be found at DjVuZone.org, or at LizardTech.com. DjVu was originally developped at AT&T Labs-Research. In March 2000, AT&T sold DjVu to LizardTech Inc. who now distributes Windows/CE/Mac plug-ins, and commercial encoders. DjVuLibre is an open source implementation of DjVu. See the credits/history page for more details. What's inside DjVu? A short technical description of DjVu is available here. In short, DjVu is a multipage doc***ent format that can use a number of different coder/decoders (codecs) to compress the individual chunks that compose an images or a page. In fact, DjVu is really four compression techniques wrapped into one format: DjVuPhoto (aka IW44): A progressive, wavelet-based lossy compression format for continuous-tone images (i.e. photos and pictures). DjVuBitonal (aka JB2): A lossless or lossy compression technique for bitonal (black & white) or palettized images that is particularly effective on images with repeated shapes (such as doc***ents images where the same character appears many times in the doc***ent). DjVuDoc***ent: A technique for scanned color doc***ent that separates images into a foreground layer that contains the text and line drawings, and a background layer that contains the pictures and background textures. The foreground is encoded with DjVuBitonal and the Background with DjVuPhoto. BZZ: A general-purpose data compression technique similar to bzip2. Bzz is used to compress searchable text layers and other metadata in DjVu doc***ents. DjVu can be seen as nicely complementing PNG and MNG (which, unlike DjVu are lossless formats) in the areas of doc***ent image compression and lossy photo compression. DjVuPhoto is a bit older, but similar in spirit to JPEG-2000. It is on a par with JPEG-2000 in terms of image quality and file size, but it compares favorably in terms of rendering time and memory requirements. DjVuBitonal is better than MMR/GroupIV (used by PDF, TIFF, and most fax machines) by about a factor of 3 to 10. It is also better than the emerging standard JBIG2 by about 20%. What is DjVuLibre? In an effort to promote DjVu as a Web standard, LizardTech's management was enlightened enough to release the reference implementation of DjVu under the GNU GPL in October 2000. DjVuLibre (pronounced like the French "déjà vu libre", which means free DjVu), is an enhanced version of that code maintained by the original inventors of DjVu. It is compatible with version 3.5 of LizardTech's DjVu software suite. DjVuLibre includes: A standalone DjVu viewer for Unix under X11 (based on the Qt library). A browser plugin that works with most Unix browsers, including: Netscape-4.x, Netscape-6.x, Mozilla, Galeon, Konqueror, and Opera. A full-fledged wavelet-based compressor for pictures. A simple compressor for bitonal (black and white) scanned pages. A very simple compressor for scanned color pages. A compressor for palettized images (a la GIF/PNG). A full set of utilities to manip****te and a***emble DjVu images and doc***ents. A set of decoders to convert DjVu to a number of other formats. An up-to-date version of the C++ DjVu Reference Library Windows and Mac versions of the viewer/plug-in, free Windows compressors, and high-end commercial compressors and OCR engines are available from LizardTech Inc.. The compressors provided here are slower, produce larger files (sometimes with lower image quality) than the commercial compressors, but they do the job. For those who like quick solutions without having to install software, a variety of free web-based conversion services are also available, including Any2DjVu and Bib2Web. |
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technical description of DjVu is available here |
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credits/history |
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What's inside DjVu? A short technical description of DjVu is available here. In short, DjVu is a multipage doc***ent format that can use a number of different coder/decoders (codecs) to compress the individual chunks that compose an images or a page. In fact, DjVu is really four compression techniques wrapped into one format: DjVuPhoto (aka IW44): A progressive, wavelet-based lossy compression format for continuous-tone images (i.e. photos and pictures). DjVuBitonal (aka JB2): A lossless or lossy compression technique for bitonal (black & white) or palettized images that is particularly effective on images with repeated shapes (such as doc***ents images where the same character appears many times in the doc***ent). DjVuDoc***ent: A technique for scanned color doc***ent that separates images into a foreground layer that contains the text and line drawings, and a background layer that contains the pictures and background textures. The foreground is encoded with DjVuBitonal and the Background with DjVuPhoto. BZZ: A general-purpose data compression technique similar to bzip2. Bzz is used to compress searchable text layers and other metadata in DjVu doc***ents. DjVu can be seen as nicely complementing PNG and MNG (which, unlike DjVu are lossless formats) in the areas of doc***ent image compression and lossy photo compression. DjVuPhoto is a bit older, but similar in spirit to JPEG-2000. It is on a par with JPEG-2000 in terms of image quality and file size, but it compares favorably in terms of rendering time and memory requirements. DjVuBitonal is better than MMR/GroupIV (used by PDF, TIFF, and most fax machines) by about a factor of 3 to 10. It is also better than the emerging standard JBIG2 by about 20%. What is DjVuLibre? In an effort to promote DjVu as a Web standard, LizardTech's management was enlightened enough to release the reference implementation of DjVu under the GNU GPL in October 2000. DjVuLibre (pronounced like the French "déjà vu libre", which means free DjVu), is an enhanced version of that code maintained by the original inventors of DjVu. It is compatible with version 3.5 of LizardTech's DjVu software suite. DjVuLibre includes: A standalone DjVu viewer for Unix under X11 (based on the Qt library). A browser plugin that works with most Unix browsers, including: Netscape-4.x, Netscape-6.x, Mozilla, Galeon, Konqueror, and Opera. A full-fledged wavelet-based compressor for pictures. A simple compressor for bitonal (black and white) scanned pages. A very simple compressor for scanned color pages. A compressor for palettized images (a la GIF/PNG). A full set of utilities to manip****te and a***emble DjVu images and doc***ents. A set of decoders to convert DjVu to a number of other formats. An up-to-date version of the C++ DjVu Reference Library Windows and Mac versions of the viewer/plug-in, free Windows compressors, and high-end commercial compressors and OCR engines are available from LizardTech Inc.. The compressors provided here are slower, produce larger files (sometimes with lower image quality) than the commercial compressors, but they do the job. For those who like quick solutions without having to install software, a variety of free web-based conversion services are also available, including Any2DjVu and Bib2Web. |
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technical description of DjVu is available here |
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What is DjVuLibre? In an effort to promote DjVu as a Web standard, LizardTech's management was enlightened enough to release the reference implementation of DjVu under the GNU GPL in October 2000. DjVuLibre (pronounced like the French "déjà vu libre", which means free DjVu), is an enhanced version of that code maintained by the original inventors of DjVu. It is compatible with version 3.5 of LizardTech's DjVu software suite. DjVuLibre includes: A standalone DjVu viewer for Unix under X11 (based on the Qt library). A browser plugin that works with most Unix browsers, including: Netscape-4.x, Netscape-6.x, Mozilla, Galeon, Konqueror, and Opera. A full-fledged wavelet-based compressor for pictures. A simple compressor for bitonal (black and white) scanned pages. A very simple compressor for scanned color pages. A compressor for palettized images (a la GIF/PNG). A full set of utilities to manip****te and a***emble DjVu images and doc***ents. A set of decoders to convert DjVu to a number of other formats. An up-to-date version of the C++ DjVu Reference Library Windows and Mac versions of the viewer/plug-in, free Windows compressors, and high-end commercial compressors and OCR engines are available from LizardTech Inc.. The compressors provided here are slower, produce larger files (sometimes with lower image quality) than the commercial compressors, but they do the job. For those who like quick solutions without having to install software, a variety of free web-based conversion services are also available, including Any2DjVu and Bib2Web. |
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Djvu.sourceforge.net
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