Comments on: DejaVu http://www.tangentspace.net/cz/archives/2006/12/dejavu/ somewhere near the beginning. Mon, 01 Dec 2008 20:15:21 +0000 http://wordpress.org/?v=2.5 By: Russell http://www.tangentspace.net/cz/archives/2006/12/dejavu/#comment-78769 Russell Tue, 26 Dec 2006 12:36:32 +0000 http://www.tangentspace.net/cz/archives/2006/12/dejavu#comment-78769 Here is a link that I use a lot :) http://ebooksclub.org/ they have a very nice collection of "free" books! Here is a link that I use a lot :)

http://ebooksclub.org/ they have a very nice collection of “free” books!

]]> By: RJIH http://www.tangentspace.net/cz/archives/2006/12/dejavu/#comment-78654 RJIH Tue, 26 Dec 2006 01:42:28 +0000 http://www.tangentspace.net/cz/archives/2006/12/dejavu#comment-78654 http://lib.org.by/ http://lib.org.by/

]]> By: Alex http://www.tangentspace.net/cz/archives/2006/12/dejavu/#comment-78569 Alex Mon, 25 Dec 2006 23:22:37 +0000 http://www.tangentspace.net/cz/archives/2006/12/dejavu#comment-78569 Point taken about PDF vs. DjVu, but my pirate library (nice term) is just for me, so I'll take them however they come. Point taken about PDF vs. DjVu, but my pirate library (nice term) is just for me, so I’ll take them however they come.

]]> By: AnonEcon http://www.tangentspace.net/cz/archives/2006/12/dejavu/#comment-78428 AnonEcon Mon, 25 Dec 2006 03:02:14 +0000 http://www.tangentspace.net/cz/archives/2006/12/dejavu#comment-78428 If copyright issues don't bother you, then you can find lot of math books in DjVU format on P2P networks like Bittorrent and EDonkey2K. The clients I like to use for these networks are <a href="http://www.utorrent.com/" rel="nofollow">µTorrent</a> and <a href="http://www.emule-project.net" rel="nofollow">eMule</a> respectively. However, at least for scanned black-and-white books, the superiority of DjVU over PDF is dramatic only when the PDF file uses older compression algorithms. DjVU at best gives only a marginal improvement over PDF files compressed with the newer JBIG2 codec (<a href="http://www.searchpdf.com/scanned_clippings.htm" rel="nofollow">here</a> is one comparison. Unfortunately, there aren't any mature, free, JBIG2 encoders yet. But once they arrive, DjVU is unlikely to survive. So, I would be wary of building up my pirate library in that format (though at the moment there are tools which will convert DjVU files to PDF). If copyright issues don’t bother you, then you can find lot of math books in DjVU format on P2P networks like Bittorrent and EDonkey2K. The clients I like to use for these networks are µTorrent and eMule respectively.

However, at least for scanned black-and-white books, the superiority of DjVU over PDF is dramatic only when the PDF file uses older compression algorithms. DjVU at best gives only a marginal improvement over PDF files compressed with the newer JBIG2 codec (here is one comparison. Unfortunately, there aren’t any mature, free, JBIG2 encoders yet. But once they arrive, DjVU is unlikely to survive. So, I would be wary of building up my pirate library in that format (though at the moment there are tools which will convert DjVU files to PDF).

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