配置QT Mingw & opencv

卡卡西村長發表於2019-03-10
QTOpenCV

可以直接從這裡下載別人構建好的

https://github.com/huihut/OpenCV-MinGW-Build

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1、下載並安裝QT5.12或更高版本，勾選MingW x64

2、把qt bin目錄加入PATH：

C:\Qt\Qt5.12.1\5.12.1\mingw73_64\bin

C:\Qt\Qt5.12.1\Tools\mingw730_64\bin

3、下載opencv4.0或更高版本，解壓為 D:\software\opencv\sources

4、下載CMake3.14或更高版本，安裝時選擇把bin目錄加入PATH

5、安裝python2.7.16，安裝時選擇把bin目錄加入PATH

6、安裝JDK1.8

7、啟動CMake，輸入原始碼和構建目錄：

原始碼目錄：D:\software\opencv\sources

構建目錄：D:\software\opencv\build

點選左下角的Configuration按鈕，選擇構建模式為MingGW makefiles，選擇 Native Compiler，選擇C和C++編輯器的位置：

C:\Qt\Qt5.12.1\Tools\mingw730_64\bin\gcc.exe

C:\Qt\Qt5.12.1\Tools\mingw730_64\bin\g++.exe

然後等待配置。

8、配置完成後，勾選WITH_OPENGL和WITH_QT兩項，選擇CMAKE_BUILD_TYPE為Release，再次configure。

9、正式開始構建

cd D:\software\opencv\build

mingw32-make -j 8

mingw32-make install

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新建一個QT專案，修改.pro檔案，加入：

INCLUDEPATH += D:\software\OpenCV-MinGW-Build-OpenCV-4.0.1-x64\include

LIBS += D:\software\OpenCV-MinGW-Build-OpenCV-4.0.1-x64\x64\mingw\bin\libopencv_core401.dll
LIBS += D:\software\OpenCV-MinGW-Build-OpenCV-4.0.1-x64\x64\mingw\bin\libopencv_highgui401.dll
LIBS += D:\software\OpenCV-MinGW-Build-OpenCV-4.0.1-x64\x64\mingw\bin\libopencv_imgproc401.dll
LIBS += D:\software\OpenCV-MinGW-Build-OpenCV-4.0.1-x64\x64\mingw\bin\libopencv_calib3d401.dll
LIBS += D:\software\OpenCV-MinGW-Build-OpenCV-4.0.1-x64\x64\mingw\bin\libopencv_imgcodecs401.dll
LIBS += D:\software\OpenCV-MinGW-Build-OpenCV-4.0.1-x64\x64\mingw\bin\libopencv_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,    //灰度圖
        contours,   //輸出輪廓
        125,    //低閾值
        350);   //高閾值

    //因為正常情況下輪廓是用非零畫素表示 我們反轉黑白值
    Mat contoursInv;    //反轉後的影像
    threshold(contours,
        contoursInv,
        128,    //低於該值的畫素
        255,    //將變成255
        THRESH_BINARY_INV);
    namedWindow("contoursInv");
    imshow("contoursInv", contoursInv);

    waitKey(0);
    return 0;
}

 

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