Downloads & Resources Software Downloads Djvu Browser Plug-ins and Desktop Viewers. Cuminas Official DjVu Browser Plug-in (Free - Win/Mac) DjVuLibre DjView (Free - Unix/Linux/Win/Mac). DjVu - image format optimized for storing scanned documents.In particular, it is ideal for creating electronic books. There are two common ways to store scanned books: enthusiast this recognition (OCR), followed by preparation of the full text of an electronic document, the less patient people spread directly 'scans' - the scanned images are often collected in a pdf document.In the first case. DjVu was initially developed by Yann LeCun, L on Bottou, Patrick Haffner, and Paul G. Howard at AT&T Labs from 1996 to 2001. It promises smaller files sizes than standard PDF's and is therefore perceived to be superior to PDF's primarily due to it's higher compression ratio.

DjVu is a web-centric format and software platform for distributing documents and images.DjVu can advantageously replace PDF, PS, TIFF, JPEG, and GIF fordistributing scanned documents, digital documents, or high-resolutionpictures. DjVu content downloads faster, displays and renders faster, looks nicer on a screen, and consume less client resources than competing formats. DjVu images display instantly and can be smoothly zoomed and panned with no lengthy re-rendering.DjVu is used by hundreds of academic,commercial, governmental, and non-commercial web sites around the world.

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DjVuLibre is an open source (GPL'ed) implementation of DjVu, including viewers, browser plugins, decoders, simple encoders, and utilities.

Native plugins for MS Windowsand Mac OS X are freely available from LizardTech Inc.The new portable viewer djview4is available as a separate package.

Latest Release: version 3.5.28 released 2020-11-20. Check out the full download page for previous versions.

Source Packages Source TAR.GZ djvulibre-3.5.28.tar.gz Binary Packages Fedora/Redhat Available from Fedora. Suse Available from OpenSuse. Debian Available from Debian (apt-get!) Ubuntu Available 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 class 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.

DjVu (pronounced 'déjà vu') a set of compression technologies,a file format, and a software platform for the delivery over the Web of digital documents, scanned documents, and high resolution images.

DjVu documents download and display extremely quickly, and look exactlythe same on all platforms with no compatibility problems due to fonts,colors, etc. DjVu can be seen as a superior alternative toPDF and PostScript for digital documents, to TIFF (and PDF) for scannedbitonal documents, 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 documents in color. No other format comes close.

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Typical DjVu file sizes are as follows:

• bitonal scanned documents: 5 to 30KB per page at 300dpi (3 to 10 times smaller than PDF or TIFF)
• color scanned documents: 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) documents: 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 document 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 documents, digital documents, 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. whonow distributes Windows/CE/Mac plug-ins, and commercial encoders.

DjVuLibre is an open source implementation of DjVu. See the credits/history page for moredetails.

A short technical description of DjVu is available here.In short, DjVu is a multipage document format that can use a number of differentcoder/decoders (codecs) to compress the individual chunks that compose animages or a page. In fact, DjVu is really four compression techniques wrapped into one format:

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• 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 documents images where the same character appears many times in the document).
• DjVuDocument: A technique for scanned color document 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 documents.

DjVu can be seen as nicely complementing PNGand MNG (which, unlike DjVu are lossless formats) in the areas of documentimage compression and lossy photo compression. DjVuPhoto is a bit older, butsimilar in spirit to JPEG-2000. It is on a par with JPEG-2000 in terms ofimage quality and file size, but it compares favorably in terms of renderingtime and memory requirements. DjVuBitonal is better than MMR/GroupIV (used byPDF, TIFF, and most fax machines) by about a factor of 3 to 10. It is alsobetter than the emerging standard JBIG2 by about 20%.

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 (sometimeswith lower image quality) than the commercial compressors, but they do the job.

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For those who like quick solutions without having to install software, a variety of free web-based conversion services are also available, including Any2DjVu andBib2Web.

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