Ubuntu14.04 install opencv3.1.0

opencv安装

• 前提条件是已经正确安装ubuntu环境
• 安装必要的依赖环境：

apt-get install build-essential
apt-get install cmake git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev
apt-get install python-dev python-numpy libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev libdc1394-22-dev

• 下载opencv3.1.0安装包：这里从opencv官网下载源码包
• 解压安装包 unzip opencv-3.1.0.zip
• 创建编译目录进行编译

cd opencv-3.1.0
mkdir release
cd release
cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local ..
make
make install

• 记住要创建opencv的搜索路径：在/etc/ld.so.conf.d/opencv.conf文件写入/usr/local/lib内容
• 执行配置更新操作ldconfig
• 在/etc/bash.bashrc文件加入如下命令，确保让pkg-config可以找到opencv库

PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig
export PKG_CONFIG_PATH

测试环境

• 在/workspace/Display_image目录下创建display_image.cpp的文件

#include <stdio.h>
#include <opencv2/opencv.hpp>
#include <opencv2/highgui/highgui_c.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;
}

• 在同目录下创建CMakeLists.txt文件

cmake_minimum_required(VERSION 2.8)
project( DisplayImage )
find_package( OpenCV required )
add_executable( DisplayImage display_image.cpp )
target_link_libraries( DisplayImage ${OpenCV_LIBS} )
````
* 创建的文件如下：




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```shell cd workspace/Display_image ls display_image.cpp lena.png CMakelists.txt * 编译运行 ```shell
cmake .
make




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• 这时会在编译目录看到有DisplayImage的可执行文件
• 测试结果

./DisplayImage lena.png

* 这时会在编译目录看到有**DisplayImage**的可执行文件
* 测试结果
```shell
./DisplayImage lena.png