ubuntu14.04中安装opencv2.4.13

FROM:http://www.cnblogs.com/MnsterLu/p/5858557.html

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1. 先下载OpenCV的源码

2. 解压到任意目录

unzip opencv-2.4.13.zip

3. 进入源码目录，创建release目录

cd opencv-2.4.13
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

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

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

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

7. 安装

sudo make install

8. 测试，在某个目录下建立一个test.cpp文件

#include <cv.h>
#include <highgui.h>

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. 写一个cmake的makefile，也叫CMakeLists.txt

project(test)
find_package(OpenCV REQUIRED)
add_executable(test test)
target_link_libraries(test ${OpenCV_LIBS})
cmake_minimum_required(VERSION 2.8)

10. 编译+运行

cmake .
make
得到可执行文件test

11. 随便弄个jpg图片做个测试，注意要和上面那个可执行文件放在同一目录下面,我这里名字取的是test.jpg。
12. ./test test.jpg 如果能看到照片，那就表示成功了。

Part 2 -----------------------------------------------------------------------------------------------------------------------------------------------

CMakeLists.txt

转载至http://blog.csdn.net/u012816621/article/details/51732932

# cmake needs this line
cmake_minimum_required(VERSION 2.8)

# Define project name
project(opencvTest)

# Find OpenCV, you may need to set OpenCV_DIR variable
# to the absolute path to the directory containing OpenCVConfig.cmake file
# via the command line or GUI
find_package(OpenCV REQUIRED)

# If the package has been found, several variables will
# be set, you can find the full list with descriptions
# in the OpenCVConfig.cmake file.
# Print some message showing some of them
message(STATUS "OpenCV library status:")
message(STATUS "    version: ${OpenCV_VERSION}")
message(STATUS "    libraries: ${OpenCV_LIBS}")
message(STATUS "    include path: ${OpenCV_INCLUDE_DIRS}")

# Add OpenCV headers location to your include paths
include_directories(${OpenCV_INCLUDE_DIRS})

# Declare the executable target built from your sources
add_executable(main main.cpp)

# Link your application with OpenCV libraries
target_link_libraries(main ${OpenCV_LIBS})

1、find_package(OpenCV REQUIRED)中的opencv一定要遵循该大小写。
　　因为该句话是根据OpenCV作为前缀自动去/usr/local/share/OpenCV（如果你的opencv安装时，默认前缀设置为：/usr/local时）文件夹中去找OpenCVConfig.cmake，OpenCV-config.cmake 两个文件，进而确定你要引入的opencv头文件和库函数在哪里。

2、自定义引入相应opencv版本
　　如果你有很多的opencv版本，尤其是一个是opencv2.x.x一个是opencv3.x.x，因为2和3在数据结构上有相对较大的变化，所以如果引入错误的版本可能导致程序的无法运行。因为find_package找默认路径下的OpenCV，但是很多时候安装多个版本的库的时候都会make install在opt目录下。、
　　安装在opt的文件中会有share文件夹，这里面就有咱们需要的ＯｐenCV文件夹，所以如果要自己有选择的控制版本，则在find_package这句话前面去设置opencv的ＯpenCV文件夹在哪里，添加set(OpenCV_DIR /opt/opencv-2.4.11/share/OpenCV)这句话。因为我的opencv2.4.11版本install在/opt/opencv-2.4.11文件夹下。这个可以根据你install的位置去变化。

ubuntu14.04中安装opencv2.4.13

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