可以直接从这里下载别人构建好的
https://github.com/huihut/OpenCV-MinGW-Build
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1、下载并安装QT5.12或更高版本,勾选MingW x64
2、把qt bin目录加入PATH:
C:QtQt5.12.15.12.1mingw73_64in
C:QtQt5.12.1Toolsmingw730_64in
3、下载opencv4.0或更高版本,解压为 D:softwareopencvsources
4、下载CMake3.14或更高版本,安装时选择把bin目录加入PATH
5、安装python2.7.16,安装时选择把bin目录加入PATH
6、安装JDK1.8
7、启动CMake,输入源代码和构建目录:
源代码目录:D:softwareopencvsources
构建目录:D:softwareopencvuild
点击左下角的Configuration按钮,选择构建模式为MingGW makefiles,选择 Native Compiler,选择C和C++编辑器的位置:
C:QtQt5.12.1Toolsmingw730_64ingcc.exe
C:QtQt5.12.1Toolsmingw730_64ing++.exe
然后等待配置。
8、配置完成后,勾选WITH_OPENGL和WITH_QT两项,选择CMAKE_BUILD_TYPE为Release,再次configure。
9、正式开始构建
cd D:softwareopencvuild
mingw32-make -j 8
mingw32-make install
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新建一个QT项目,修改.pro文件,加入:
INCLUDEPATH += D:softwareOpenCV-MinGW-Build-OpenCV-4.0.1-x64include
LIBS += D:softwareOpenCV-MinGW-Build-OpenCV-4.0.1-x64x64mingwinlibopencv_core401.dll
LIBS += D:softwareOpenCV-MinGW-Build-OpenCV-4.0.1-x64x64mingwinlibopencv_highgui401.dll
LIBS += D:softwareOpenCV-MinGW-Build-OpenCV-4.0.1-x64x64mingwinlibopencv_imgproc401.dll
LIBS += D:softwareOpenCV-MinGW-Build-OpenCV-4.0.1-x64x64mingwinlibopencv_calib3d401.dll
LIBS += D:softwareOpenCV-MinGW-Build-OpenCV-4.0.1-x64x64mingwinlibopencv_imgcodecs401.dll
LIBS += D:softwareOpenCV-MinGW-Build-OpenCV-4.0.1-x64x64mingwinlibopencv_videoio401.dll
修改main.cpp,如下:
#include "widget.h" #include <QApplication> #include <opencv2/core/core.hpp> #include <opencv2/highgui/highgui.hpp> using namespace cv; using namespace std; int main(int argc, char *argv[]) { Mat image = imread("C:\Users\Administrator\Desktop\1.bmp", 0); namedWindow("image"); imshow("image", image); Mat contours; Canny(image, //灰度图 contours, //输出轮廓 125, //低阈值 350); //高阈值 //因为正常情况下轮廓是用非零像素表示 我们反转黑白值 Mat contoursInv; //反转后的图像 threshold(contours, contoursInv, 128, //低于该值的像素 255, //将变成255 THRESH_BINARY_INV); namedWindow("contoursInv"); imshow("contoursInv", contoursInv); waitKey(0); return 0; }