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