基本c ++程序上的UBUNTU LTS错误中的Opencv答案

【问题标题】：Opencv in UBUNTU LTS error on basic c++ program基本c ++程序上的UBUNTU LTS错误中的Opencv
【发布时间】：2020-07-06 01:57:27
【问题描述】：

我在 UBUNTU 18.04 上为 C++ 安装了 opencv。我在 github 源代码上使用了 cmake，并在 opencv/release 中构建。但即使是写一个 hello world 程序包含 ''' ＃包括 ''' 导致使用 g++ 编译时出错。错误报告是：

`
In file included from /usr/include/opencv2/highgui.hpp:51,
                 from main.cpp:1:
/usr/include/opencv2/videoio.hpp:928:83: error: invalid use of incomplete type ‘struct cv::DefaultDeleter<CvCapture>’
 template<> CV_EXPORTS void DefaultDeleter<CvCapture>::operator ()(CvCapture* obj) const;
                                                                                   ^~~~~
In file included from /usr/local/include/opencv2/core/cvstd.hpp:81,
                 from /usr/local/include/opencv2/core/base.hpp:58,
                 from /usr/local/include/opencv2/core.hpp:54,
                 from /usr/include/opencv2/highgui.hpp:46,
                 from main.cpp:1:
/usr/local/include/opencv2/core/cvstd_wrapper.hpp:32:29: note: declaration of ‘struct cv::DefaultDeleter<CvCapture>’
 template<typename Y> struct DefaultDeleter;
                             ^~~~~~~~~~~~~~
In file included from /usr/include/opencv2/highgui.hpp:51,
                 from main.cpp:1:
/usr/include/opencv2/videoio.hpp:929:91: error: invalid use of incomplete type ‘struct cv::DefaultDeleter<CvVideoWriter>’
 template<> CV_EXPORTS void DefaultDeleter<CvVideoWriter>::operator ()(CvVideoWriter* obj) const;
                                                                                           ^~~~~
In file included from /usr/local/include/opencv2/core/cvstd.hpp:81,
                 from /usr/local/include/opencv2/core/base.hpp:58,
                 from /usr/local/include/opencv2/core.hpp:54,
                 from /usr/include/opencv2/highgui.hpp:46,
                 from main.cpp:1:
/usr/local/include/opencv2/core/cvstd_wrapper.hpp:32:29: note: declaration of ‘struct cv::DefaultDeleter<CvVideoWriter>’
 template<typename Y> struct DefaultDeleter;
`

编辑：相同的输出

g++ main.cpp `pkg-config --cflags --libs opencv` -o out

我的代码main.cpp是：

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

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;
}

的 bash 输出

pkg-config --cflags --libs opencv

是：

-I/usr/include/opencv -lopencv_shape -lopencv_stitching -lopencv_superres -lopencv_videostab -lopencv_aruco -lopencv_bgsegm -lopencv_bioinspired -lopencv_ccalib -lopencv_datasets -lopencv_dpm -lopencv_face -lopencv_freetype -lopencv_fuzzy -lopencv_hdf -lopencv_line_descriptor -lopencv_optflow -lopencv_video -lopencv_plot -lopencv_reg -lopencv_saliency -lopencv_stereo -lopencv_structured_light -lopencv_phase_unwrapping -lopencv_rgbd -lopencv_viz -lopencv_surface_matching -lopencv_text -lopencv_ximgproc -lopencv_calib3d -lopencv_features2d -lopencv_flann -lopencv_xobjdetect -lopencv_objdetect -lopencv_ml -lopencv_xphoto -lopencv_highgui -lopencv_videoio -lopencv_imgcodecs -lopencv_photo -lopencv_imgproc -lopencv_core

bash output

系统配置：

opencv：3.2.0

编译器：g++

操作系统：ubuntu

【问题讨论】：

由于这是一个 OpenCV 问题，请使用适当的标签而不是 machine-learning（已编辑）。
@desertnaut 好的。谢谢
OpenCV 版本？
3.2.0：opencv 版本。虽然我尝试使用来自 github 的最新源代码，但同样的错误。

标签： c++ opencv g++ static-libraries static-linking

【解决方案1】：

您需要将OpneCV 与您的程序相关联。

尝试以下方法： g++ main.cpp pkg-config --cflags --libs opencv -o out

pkg-config --cflags --libs opencv 将添加include_dirs 和link_directories。

更多解释here.

【讨论】：

我用过：g++ main.cpp pkg-config --cflags --libs opencv` -o out` ，注意` please 和同样的错误，完全一样，所以我我没有重现错误。不过谢谢你的回复。
试试g++ `pkg-config --cflags --libs opencv` main.cpp -o out。
兄弟，完全相同的错误。什么是 DefaultDeleter 错误？和这两行一样，这是唯一的错误！
我已经包含了 main.cpp 问题
你make install你的opencv了吗？