Ubuntu 12.04安装OpenCV

1. 先从sourceforge上下载OpenCV的源码

2. 解压到任意目录

1. tar xvfj OpenCV-2.4.3.tar.bz2  

3. 进入源码目录，创建release目录

1. cd OpenCV-2.4.3  
2. mkdir release  

4. 可以看到在OpenCV目录下，有个CMakeLists.txt文件，需要事先安装一些软件

1. sudo apt-get install build-essential cmake libgtk2.0-dev pkg-config python-dev python-numpy libavcodec-dev libavformat-dev libswscale-dev  

5.  进入release目录，安装OpenCV是所有的文件都会被放到这个release目录下

1. cd release  

6. cmake编译OpenCV源码，安装所有的lib文件都会被安装到/usr/local目录下

1. cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local ..  

7. 安装

1. sudo make install  

8. 测试，在某个目录下建立一个DisplayImage.cpp文件

#include
#include

using namespace cv;

int main(int argc, char* argv[])
{
    Mat image;
    image = imread(argv[1], 1);

    if (argc != 2 || !image.data)
    {
        printf("No image data\n");
        return -1;
    }

    namedWindow("Display Image", CV_WINDOW_AUTOSIZE);
    imshow("Display Image", image);
    waitKey(0);
    return 0;
}

9. 从网上下那个著名的lena.jpg放在cpp目录下

10. 写一个cmake的makefile，也叫CMakeLists.txt

1. project(DisplayImage)  
2. find_package(OpenCV REQUIRED)  
3. add_executable(DisplayImage DisplayImage)  
4. target_link_libraries(DisplayImage ${OpenCV_LIBS})  
5. cmake_minimum_required(VERSION 2.8)  

11. 编译+运行

1. cmake .  
2. make  
3. ./DisplayImage lena.jpg  

12. 完成




1，ERROR：I wrote a CMakeLists.txt for a project in C++, which uses OpenCV libraries. When I try to create the project using cmake, I get the next configuration problem:

CMake Error at CMakeLists.txt:15 (find_package):
  Could not find module FindOpenCV.cmake or a configuration file for package
  OpenCV.

  Adjust CMAKE_MODULE_PATH to find FindOpenCV.cmake or set OpenCV_DIR to the
  directory containing a CMake configuration file for OpenCV.  The file will
  have one of the following names:

    OpenCVConfig.cmake
    opencv-config.cmake 

The fact is that I have an environment variable for the path which I use in Visual Studio with no problems. If I don't include OpenCV, then I can configure and generate with no problem, but I need to solve the problem. I don't understand why cmake cannot find the OpenCV path or how to fix it.

I also used the recommendations mentioned in this link:

Does anybody had this problem too?

解决：

export OpenCV_DIR=