一、OpenCV的安装

申明：此方法在Fedora22上安装成功

1、安装编译环境
        sudo dnf install gcc gcc-c++ ncurses-devel cmake cmake-qt-gui

2、安装GTK+2.x
        sudo dnf install gtk2 gtk2-devel gtk2-devel-docs
        sudo dnf install libgnome-devel gnome-devel-docs
        sudo dnf install zlib glib atk pango gdk-pixbuf2 gdk-pixbuf2-devel

3、安装依赖包
        sudo dnf install gtk+ gtk2-devel pkgconfig python-devel python-numpydoc
        sudo dnf install libavc1394 libavc1394-devel libdc1394 libdc1394-devel jasper-devel
        sudo dnf install ffmpeg ffmpeg-devel openjpeg-devel libjpeg-devel libpng-devel libtiff-devel

4、解压opencv-3.0.0.zip，并且mkdir release

5、打开cmake-qt-gui
        source code一栏写源码的路径
        dst一栏写那个release路径
        点击configure然后点generate
        若显示ICV: Downloading ippicv_linux_20141027.tgz...
        那么可以把之前下载好的ippicv_linux_20141027.tgz文件放到路径~/opencv-3.0.0/3rdparty/ippicv/downloads/linux-8b449a536a2157bcad08a2b9f266828b下

6、去指定安装的路径下执行
        make
        sudo make install

7、默认的安装路径在/usr/local下，有/usr/local/include，/usr/local/lib等路径

8、添加opencv.conf文件
        sudo vim /etc/ld.so.conf.d/opencv.conf
        添加内容：/usr/local/lib

10、查询包是否安装成功
        输入：pkg-config --cflags opencv
        显示：-I/usr/local/include/opencv -I/usr/local/include

        输入：pkg-config --libs opencv
        显示：-L/usr/local/lib -lopencv_shape -lopencv_stitching -lopencv_objdetect -lopencv_superres -lopencv_videostab -lopencv_calib3d
             -lopencv_features2d -lopencv_highgui -lopencv_videoio -lopencv_imgcodecs -lopencv_video -lopencv_photo -lopencv_ml
             -lopencv_imgproc -lopencv_flann -lopencv_core -lopencv_hal

11、测试
        输入：pkg-config --modversion gtk+-2.0
        显示：2.24.28

12、编译程序
         g++ test.cpp -o test `pkg-config --cflags opencv` `pkg-config --libs opencv`

13、若觉得12的步骤太麻烦，那么可以用C语言写个程序如下：

    #include 
    #include 
    #include 

     char cmd[100] ="g++ `pkg-config --cflags opencv` `pkg-config --libs opencv` ";

    int main(int argc, char **argv)
    {
        if(argc != 2)
        {
            printf("Usage:opencv showImage.cpp\n");
            printf("This cmd is used to compile opencv\n");

            return -1;
        }

        strcat(cmd, argv[1]);

        system(cmd);

        return 0;
    }