OpenCV学习笔记（1）-----OpenCV 3.1.0环境安装

    本文记录了基于Ubuntu Desktop 16.04 安装opencv 3.1.0的过程。

1 按照OpwnCV官网介绍，按照在Ubuntu环境按照你黄OpenCV需要如下一些安装包：

• GCC 4.4.x or later
• CMake 2.6 or higher
• Git
• GTK+2.x or higher, including headers (libgtk2.0-dev)
• pkg-config
• Python 2.6 or later and Numpy 1.5 or later with developer packages (python-dev, python-numpy)
• ffmpeg or libav development packages: libavcodec-dev, libavformat-dev, libswscale-dev
• [optional] libtbb2 libtbb-dev
• [optional] libdc1394 2.x
• [optional] libjpeg-dev, libpng-dev, libtiff-dev, libjasper-dev, libdc1394-22-dev

2 安装opencv依赖的package

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

3 下载opencv源码包并编译安装

3.1 下载地址

3.2 编译和安装OpenCV

    1）解压下载的opencv源码包opencv-3.1.0.zip

unzip opencv-3.1.0.zip 

    2)创建release目录

在opencv-3.1.0目录下创建release目录（mkdir release） 

   3）编译opencv

在opencv-3.1.0目录下创建release目录（mkdir release）

   4）配置opencv

    在release目录下执行如下命令：

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

    5）编译

    在release目录下执行如下命令：

make

    6）安装

    在release目录下执行如下命令：

sudo make install

4 验证安装环境

    简单读取一张图片并显示：

1）主程序

#include <opencv2/highgui.hpp>
#include <opencv2/imgproc.hpp>

using namespace cv;

int main( int argc, char** argv )
{
    
    if( argc != 2 )
    {
        printf( "command error\n " );
        return -1;
    }
    char* imagefile = argv[1];

    Mat image;
    image = imread( imagefile, 1 );

    if(  !image.data)
    {
        printf( "No image found\n " );
        return -1;
    }

    namedWindow( imagefile, CV_WINDOW_AUTOSIZE );
    imshow( imagefile, image );

    waitKey(0);

    return 0;
}

2）CMakeLists.txt

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

3)运行并显示结果

./test ../../test.JPG