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Calibre calibre is a free DjVu to EPUB converter software for Windows, Linux, and Mac. Using it, you cannot only convert one but multiple DjVu eBooks to EPUB format at once. It provides a dedicated batch eBook converter tool for doing so. Download WinDjView for free. A fast, compact, and powerful DjVu viewer. WinDjView is a fast, compact and powerful DjVu viewer for Windows with tabbed interface, continuous scrolling and advanced printing options, based on free DjVuLibre library. MacDjView is a simple DjVu viewer for Mac OS X, also with continuous scrolling.
Calibre Djvu Files
This page explains how to create a DjVu file. The format can be used in galleries or categories like any supported image format, and reduces the size and number of the files that need to be copied.
If you have difficulties, you can ask for help at the Commons:Help desk.
Example: [[File:Alice in Wonderland.djvu|thumb|Alice in Wonderland, page 9|page=9]].
Introduction[edit]
The aim is to create a DjVu file from bitmap versions (jpg, tif, etc.) found on Internet or scanned. This is favorable because:
- all pages of a book are available on a single file
- all pages can be seen from the file page of the DjVu file
- every page can be used in the 'page' space
- DjVu files are small
- only one single file needs to be copied, compared to hundreds of pages in bitmap format.
- creating a DjVu file is quicker than uploading hundreds of bitmap files.
Drawbacks:
- The numbering of the pages does not seem to be freely configurable
- Loss of quality can occur
Within MediaWiki projects[edit]
Pages of DjVu files can be navigated in Mediawiki installations that have the ProofreadPage extension plugin installed. This is the case on all language versions of Wikisource.
Once a is uploaded to Commons, an index page needs to be created. Navigation is done by using the name of the file prefixed by 'page:' and followed by '/X', with 'X' is the page number.
Page numbering[edit]
The DjVu format created a default page numbering which is displayed in a drop-down menu (see Image:Wind in the Willows.djvu). It is advisable to have the page numbering match that of the original book, for easier use. This can be problematic when some pages (like in introductions) are numbered in Roman numbers. In this case, one solution is to create a second DjVu file for these pages.
Converting a PDF file[edit]
Please see page Help:Converting PDF to DjVu
Other formats[edit]
Tiff files from Gallica can be opened in FineReader (even after the evaluation period is over). By exporting the pages into tiff (same format), it is possible to crop the margins with XnView, and to load the pages into DjVu Solo. Page numbering is automatic.
MS Windows[edit]
Conversion through DjVu Solo[edit]
DjVu Solo. It is also possible to use LizardTech Virtual Printer, which is available for no charge and can convert documents through a printing process. Procedure is more or less the same for all conversion programmes: load the bitmap files into the programme, check their order and launch the conversion process.
By default, DjVu Solo is set to convert pages with a 300 dpi resolution. This is usually a good value.
Conversion through DjVuLibre[edit]
DjVuLibre doesn't have a GUI for converting files, but with an appropriate script you can do it automatically with next to no user input. See the scripts to create a single, collated DjVu file.
On Mac OS[edit]
Using MacPorts, one can install a number of DjVu programs for use on Macintosh computers:
On Linux, FreeBSD, etc.[edit]
You need the DjVuLibre software, a collection of command-line tools for creating, modifying, and viewing DjVu files. You will probably also need the ImageMagick or GraphicsMagick software if you need to convert page scans from bitmap formats.
Converting page scans[edit]
The tool cjb2 is used to creating a DjVu file from a PBM or TIFF file. Therefore you need to convert your scans if they are not already in one of these formats. (The examples below use the convert tool from ImageMagick, but they will also work with GraphicsMagick's gm convert command.)
- Conversion from PNG format to PBM format with convert:
Calibre Djvu To Epub
- Depending on the quality of the original scans, you may find it useful to process them with the unpaper utility, which deletes black borders around the pages and aligns the scanned text squarely on the page. Unpaper is also capable of extracting two separate page images where facing pages of a book have been scanned into a single image.
- Creation of a DjVu file from a PBM file
- Adding the DjVu file to the final document
You need to repeat these steps with a script for each page of the book. Example:
Alternatively, you may use a makefile, and run parallel processes with 'make -j'
Converting PostScript files (PDF, PS, EPS)[edit]
DjvuLibre includes djvudigital, a tool that uses Ghostscript to directly convert PDF and other PostScript files to DjVu format. However, it requires rebuilding Ghostscript from source code to include a special driver needed by djvudigital (it's part of the DjvuLibre distribution, but because of conflicting open-source licenses, it cannot be distributed legally as a binary). Once built, though, it is a very convenient tool to use; it can even convert PDF files from Google Books without any extra work. It's as easy as:
Ubuntu Djvu
The --words option should be included to copy any searchable text that exists in the PDF file over to the final DjVu file. This also allows words to be highlighted in searches. (To eke out a little savings in file size, you could use --lines instead of --words, which would record the position of each line instead of each individual word; text could still be searched by word, but entire lines would be highlighted in search results instead of the individual words. This probably won't matter in maps, illustrations, etc. where words are scattered all over the page.)
See also[edit]
External links[edit]
Calibre Djvu To Mobi
Software[edit]
- DjVuLibre package: open source, for Mozilla, Firefox, Konqueror, Netscape, Galeon, and Opera, Linux/Unix.
- Lizardtech DjVu Browser Plug-in: for Win/Mac
- WinDjView and MacDjView Desktop Viewers: open source, for Win/Mac
- DjVuOutline: DjVu outline (contents, bookmarks) editor, open source, Windows only
- STDU Viewer: for Windows
- DjVu Viewer: for Windows
- DjVu Solo 3.1, DjVuVersion Command Line Utility, DjVu ActiveX Control for Microsoft Office 2000 (exe, 1.5 Mb): can be found at djvu.org
- PDF2DJVU command line utility to convert Adobe PDF to DjVu files, for Windows, Mac, and *NIX/Linux
- PDF to DjVu GUI, a graphical interface for PDF2DJVU command line utility, for Windows
- Djvu-Spec Pdf 2 Djvu Converter, for Windows
- [1], Spacemacs djvu-layer for Linux/Mac (should be possible to get it work on Windows also).
Websites[edit]
Calibre Djvu To Pdf
- Downloads & Resources at djvu.org
- Any2DjVu: online DjVu compression server
- MiniDjVu: open source DjVu compressor for Linux/Unix and Windows.
- DjVu file extension File-Extensions.org Library