http://www.computer-vision-software.com/blog/2009/11/faq-opencv-haartraining/

http://alereimondo.no-ip.org/OpenCV/34

http://ipr10.wikidot.com/blob-detection

http://stackoverflow.com/questions/2188646/how-can-i-detect-and-track-people-using-opencv

[pdf opensource reader]

http://live.gnome.org/Evince

http://forums.fofou.org/sumatrapdf/

http://serverfault.com/questions/21727/open-source-pdf-reader-for-windows-as-an-alternative-to-adobe-reader

[twitter]

http://www.ibm.com/developerworks/cn/xml/x-twitterREST/?S_TACT=105AGX52&S_CMP=tec-csdn

http://www.coreseek.cn/opensource/mmseg/

http://www.cppblog.com/whncpp/archive/2008/09/21/62378.html

http://blog.csdn.net/dongle2001/article/details/1472235

http://www.piaoyi.org/php/php-similar_text.html

http://www.cnblogs.com/bogan/articles/1517113.html

http://www.yzmsb.com/art_7.htm

http://stackoverflow.com/questions/5159390/open-source-tools-for-text-clustering-and-auto-summarization

http://www.summarization.com/

http://stackoverflow.com/questions/402440/about-automatic-text-summarizer-lingustic-based

http://sourceforge.net/apps/mediawiki/opennlp/index.php?title=Main_Page

Automatic summarization

sudo apt-cache search perl Text::Iconv