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authortoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
committertoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
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Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.
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+
+1- WHAT IS DJVU.
+================
+
+DjVu (pronounced "d�j� 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 exactly the
+same on all platforms. DjVu can be seen as superior alternative to PDF and
+Postscript for digital documents, to TIFF (and PDF) for scanned documents, to
+JPEG 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.
+
+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.
+
+- Palettized images:
+ 2 times smaller than GIF,
+ up to 10 times if there is text.
+
+DjVu is used by hundreds of commercial, governmental, and non-commercial web
+sites around the world to distribute scanned documents, digital documents, and
+high-resolution photos.
+
+Demos, and general information about DjVu can be found at
+http://www.djvuzone.org, or at http://www.lizardtech.com.
+
+DjVu was originally developed at AT&T Labs-Research. AT&T sold DjVu to
+LizardTech Inc. in March 2000.
+
+
+
+2- 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 "d�j� vu
+libre"), is an enhanced version of that code maintained by the original
+inventors of DjVu. It is compatible with LizardTech's DjVu software v3.5.
+
+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 compressor for palettized images (a la GIF).
+
+- A full set of utilities to manipulate and assemble DjVu images and documents.
+
+- 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, as well as commercial versions
+of the compressors and OCR engines are available from LizardTech Inc.. The
+compressors provided here are slower, produce larger files, and sometimes
+lower quality images than the commercial compressors, but they do the job.
+
+A variety of free web-based conversion services are also available, including
+any2djvu.djvuzone.org, bib2web.djvuzone.org, and openlib.djvuzone.org.
+
+
+
+