Install OpenCV2.1 http://d.hatena.ne.jp/niitsuma/20080209/1269351137 then sample codes installed /usr/local/share/sample c sample /usr/local/share/sample/c Add CMakeLists.txt in /usr/local/share/sample/c/ as INCLUDE_DIRECTORIES(/usr/local/include/opencv) SET(OpenCV_INCLUDE_DIRS /usr/local/include/opencv) LINK_DIRECTORIES("/usr/local/lib") SET(OpenCV_LIB_DIR "/usr/local/lib") #example for contours.