Ubuntu18.04+Opencv

1、下载解压

OpenCV：http://opencv.org/

2、编译配置环境

$ cd ~/opencv
$mkdir release
$cd release
$cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local ..
$make
$sudo make install
$sudo gedit/etc/ld.so.conf.d/opencv.conf   //末尾加入/usr/local/lib
$sudo ldconfig
$sudo gedit/etc /bash.bashrc   加入：
$PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/local/lib/pkgconfig
$export PKG_CONFIG_PATH

2、测试

$ gedit test.cpp

#include <iostream>
#include <opencv2/opencv.hpp>

using namespace std;
using namespace cv;

int main (void)
{
	Mat image = imread("test.jpg");
	imshow("image",image);
	waitKey(5000);
	return(0);
}

$ gedit CMakeLists.txt

cmake_minimum_required(VERSION 2.8)
project(test)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

add_executable(${PROJECT_NAME} test.cpp)
target_link_libraries(${PROJECT_NAME} opencv_core opencv_highgui opencv_imgcodecs)

$ mkdir build && cd build
$ cmake ..
$ make 
$ ./test