Opencv4.3库编译好了，cmake install 完成，在"**install**目录"下结构是这样的
D:\opencv\newbuild\install\include\opencv2\imgproc...
D:\opencv\newbuild\install\x64\mingw\lib\libopencv_world430.dll.a
D:\opencv\newbuild\install\x64\mingw\bin\libopencv_world430.dll
QT中采用**minGW**方式调用opencv //.pro
INCLUDEPATH += D:\opencv\newbuild\install\include
D:\opencv\newbuild\install\include\opencv2
LIBS += D:\opencv\newbuild\install\x64\mingw\bin\libopencv_world430.dll
#这个dll 60M大小，没有生成debug版本word430d.dll...
//main.cpp
#include <opencv2/opencv.hpp>
#include <opencv2/highgui.hpp>
#include <opencv2/imgproc.hpp>
#include <opencv2/imgcodecs.hpp>//没毛病的几个包含
using namespace cv;
。。。
string inputName = "D:\\1.jpg";
Mat img = imread(inputName);
imshow("img", img);
特别注意的是，imread点击**可以跳转到定义页面**
@param filename Name of file to be loaded.
@param flags Flag that can take values of cv::ImreadModes
*/
CV_EXPORTS_W Mat imread( const String& filename, int flags = IMREAD_COLOR );
但是运行，就提示错误
error: undefined reference to `cv::imread(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int)'
编译后要求的参数类型有偏差了？
冒似有点眉目了，可能是GCC C++11标准改变问题，造成与库不一致，这可咋整哦，晕~
