Qt使用OpenCV读取图片练习

墨蓝 2023-07-09 15:26 91阅读 0赞

pro配置

QT += core
    QT -= gui
    
    CONFIG += c++11
    
    TARGET = myOpencvTest1
    CONFIG += console
    CONFIG -= app_bundle
    
    TEMPLATE = app
    
    SOURCES += main.cpp
    
    INCLUDEPATH += C:\OpenCv4.0\include  \
                   C:\OpenCv4.0\include\opencv2
    
    CONFIG(debug, debug|release): {
    LIBS += -LC:\OpenCv4.0\x64\vc14\lib \
            -lopencv_world400d
    } else:CONFIG(release, debug|release): {
    LIBS += -LC:\OpenCv4.0\x64\vc14\lib \
            -lopencv_world400
    }
    
    
    # The following define makes your compiler emit warnings if you use
    # any feature of Qt which as been marked deprecated (the exact warnings
    # depend on your compiler). Please consult the documentation of the
    # deprecated API in order to know how to port your code away from it.
    DEFINES += QT_DEPRECATED_WARNINGS
    
    # You can also make your code fail to compile if you use deprecated APIs.
    # In order to do so, uncomment the following line.
    # You can also select to disable deprecated APIs only up to a certain version of Qt.
    #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

源代码

#include <QCoreApplication>
    #include <iostream>
    #include <opencv2/opencv.hpp>
    #include <opencv2/core.hpp>
    #include <opencv2/imgcodecs.hpp>
    //#include <opencv2/highgui.hpp>
    #include <QDebug>
    #include <QDir>
    #include <QFile>
    
    using namespace std;
    using namespace cv;
    
    int main()
    {
        string strFileName;
        //! 方式1 绝对路径 单斜杠
        //strFileName = "C:/1.png";
        //! 方式2 绝对路径 双斜杠
        //strFileName = "C://1.png";
        //! 方式3 绝对路径 双斜杠
        //strFileName = "C:\\1.png";
        //! 方式4 默认路径
        qDebug()<<QDir().currentPath();
        strFileName = "/1.png";
        Mat matImg;
        matImg = imread(strFileName, IMREAD_COLOR);
        if (matImg.empty()){
            qDebug("erro");
            return 0;
        }
        qDebug()<<matImg.cols<<matImg.rows;
    
        imshow("oringin", matImg);
    
        waitKey(0);
    //    return 0;
    }