main.cpp:1:10: 致命错误: opencv2/highgui.hpp: 没有那个文件或目录 [英] main.cpp:1:10: fatal error: opencv2/highgui.hpp: No such file or directory

问题描述

我已经在 ubuntu 18.04 中安装了 opencv 并且安装成功，我试过这个命令:$ pkg-config --modversion opencv其输出为:4.0.1-dev在此之后，我尝试朗姆酒 C++ 代码:

I have install opencv in ubuntu 18.04 and it was installed successfully, I have tried this command: $ pkg-config --modversion opencv and its output is: 4.0.1-dev after this i have tried to rum c++ code:

#include <opencv2/highgui.hpp>
#include <iostream>
using namespace std;

int main( int argc, char** argv ) {

  cv::Mat image;
  image = cv::imread("sample.jpeg" , CV_LOAD_IMAGE_COLOR);

  if(! image.data ) {
      std::cout <<  "Could not open or find the image" << std::endl ;
      return -1;
    }

  cv::namedWindow( "Display window", cv::WINDOW_AUTOSIZE );
  cv::imshow( "Display window", image );

  cv::waitKey(0);
  return 0;
}

使用这个命令::~/cpp_test$ g++ main.cpp -o output pkg-config --cflags --libs opencv但它抛出了一个致命错误:

with this command: :~/cpp_test$ g++ main.cpp -o output pkg-config --cflags --libs opencv but it throws a fatal error:

main.cpp:1:10: fatal error: opencv2/highgui.hpp: No such file or directory
 #include <opencv2/highgui.hpp>
          ^~~~~~~~~~~~~~~~~~~~~
compilation terminated.

我已经复习了一些类似的问题，但我没有找到答案，我认为这是因为环境变量的原因，我不知道我必须设置哪些变量.

I have reviewed some similar questions but i did not find my answer, i think this is because of environment variables and i do not know which variables i have to set.

推荐答案

在编译命令中，在opencv"旁边添加一个4"(或者你的 OpenCV 版本号):

In the compiling command add a "4" next to "opencv" (or the number of your version of OpenCV):

$ g++ main.cpp -o output \`pkg-config --cflags --libs opencv4\`

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