【opencv】Linux下安装opencv3.4.3

安装opencv3.4.3

进入官网
https://opencv.org/releases.html
选择如下图所示

下载解压，并进入opencv3.4.3文件夹内

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

之后需要等一段时间，一直在编译，等到１００％则完成

检查opencv是否安装成功

１．

mkdir ~/opencv-demo
cd ~/opencv-demo/

２．

gedit DisplayImage.cpp
gedit CMakeLists.txt

DisplayImage.cpp代码如下

#include 
#include 
using namespace cv;

int main(int argc, char** argv)
{
    Mat image;
    image = imread(argv[1], 1);
    if (!image.data)
    {
        printf("No image data\n");
        return -1;
    }
    namedWindow("display", WINDOW_AUTOSIZE);
    imshow("display", image);
    waitKey(0);
    return 0;
}

CMakeList.txt代码如下：

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

３．

cmake .
make

４．生成可执行文件进行执行程序

./DisplayImage ouwen.jpeg

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