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The DjVu Reference Library 3.5 was released by Lizardtech under the GNU General Public License version 2. DjVuLibre-3.5 was developed by Leon Bottou and others as a "Derived Work" of the DjVu Reference Library 3.5. As such, it is also subject to the GNU General Public License version 2.
Several patents apply to two very specific aspects of DjVu and DjVuLibre. The patents cover a particular aspect of the ZP-coder (the arithmetic coder used in DjVu and implemented in libdjvu/ZPCodec.cpp) and the background masking technique used in the IW44 wavelet encoder (implemented in libdjvu/IW44EncodeCodec.cpp).
Most patents are owned by AT&T. LizardTech has very broad rights to them and grants free and permanent licenses to them for the purpose of building GPL software with the DjVu Reference Library. The grant is materialized by two paragraphs in the headers of the DjVu Reference Library source files. Lizardtech also published an official statement about the open source.
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License
GNU General Public License version 2.0 (GPLv2)Follow DjVuPlus
User Reviews
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Windows 7 Professional SP1 x64 Installed, same splash screen error on running as for the similar application DjVuppWin-v1beta.exe DjVu++ instal ends with splash screen: "How do I get set up? *add jar folder from Lib Folder *Run DjVuStart.java Contribution guidelines :- DjVu Team ++ Code review DR: Ahmed sallam contact us :- DjVu Team ++ Code review DR: Ahmed sallam *sallam.ah@gmail.com" No help really to the neophyte, may be after some research perhaps.
