ubuntu opencv使用

1. 创建工作目录
   mkdir ~/opencv-lena
   cd ~/opencv-lena
   gedit DisplayImage.cpp

2. 编辑如下代码
   #include
   #include

using namespace cv;

int main(int argc, char** argv )
{
if ( argc != 2 )
{
printf(“usage: DisplayImage.out \n”);
return -1;
}
Mat image;
image = imread( argv[1], 1 );
if ( !image.data )
{
printf(“No image data \n”);
return -1;
}
namedWindow(“Display Image”, WINDOW_AUTOSIZE );
imshow(“Display Image”, image);
waitKey(0);
return 0;
}

3. 创建CMake编译文件
   gedit CMakeLists.txt
   写入如下内容：
   cmake_minimum_required(VERSION 2.8)
   project( DisplayImage )
   find_package( OpenCV REQUIRED )
   add_executable( DisplayImage DisplayImage.cpp )
   target_link_libraries( DisplayImage ${OpenCV_LIBS} )
4. 编译
   cd ~/opencv-lena
   cmake .
   make
5. 执行
   此时opencv-lena文件夹中已经产生了可执行文件DisplayImage，下载lena.jpg放在opencv-lena下，运行

./DisplayImage lena.jpg