安装
测试环境为centos
安装依赖
yum install cmake gcc gcc-c++ gtk2-devel gimp-develgimp-devel-tools gimp-help-browser zlib-devel libtiff-devel libjpeg-devellibpng-devel gstreamer-devel libavc1394-devel libraw1394-devel libdc1394-develjasper-devel jasper-utils swig python libtool nasm
下载opencv
http://sourceforge.net/projects/opencvlibrary/files/opencv-unix/2.4.9/opencv-2.4.9.zip/download，拷贝到/usr/local/路径之下 。
命令：“unzip opencv-2.4.9.zip”解压出opencv的源码
命令：“cd opencv-2.4.9”进入源码文件夹
命令：“cmake CMakeLists.txt”，生成build文件
命令：”make”，完成opencv的编译
命令：“make install”，完成opencv的安装
安装完成后 Opencv的头文件在“/usr/local/include”目录下
Opencv的库文件在“/usr/local/lib”目录下
命令：“cd /etc/ld.so.conf.d/”，进入库文件环境变量配置文件夹，命令“ls”，可以查看当前文件夹下已有的库文件配置。
命令:“vim opencv.conf”，按下“i”，输入opencv的库文件目录“/usr/local/lib”，保存退出(:wq)
命令:"ldconfig" 加载库文件配置
环境变量配置
vim /etc/bashrc
添加：PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig
export PKG_CONFIG_PATH
保存之后执行
source /etc/bashrc
测试安装是否成功
cd /usr/local/opencv-2.4.9/samples/c
命令：./build_all.sh
编译结束之后执行:
./facedetect cascade=“/usr/local/share/OpenCV/haarcascades/haarcascade_frontalface_alt.xml”--scale=1.5 lena.jpg
如果安装成功的话，lena脸上会有一个蓝色的圈:
卸载
sudo rm -r /usr/local/include/opencv2 /usr/local/include/opencv /usr/include/opencv /usr/include/opencv2 /usr/local/share/opencv /usr/local/share/OpenCV /usr/share/opencv /usr/share/OpenCV /usr/local/bin/opencv* /usr/local/lib/libopencv*