【QT使用记录】QT与Halcon、QT与OpenCV配置及使用，QT显示图片的四种方式

找了好多资料，网上关于QT与halcon和OpenCV配置资料和显示图片很复杂，我给出我的方式，亲测有效，在此分享出来，供大家参考。

一、配置.pro文件，也就是VS中包含文件和库目录

我直接贴出我的.pro文件，更改之后记得qmake一下(构建->qmake)

#-------------------------------------------------
#
# Project created by QtCreator 2019-07-16T10:19:59
#
#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = test
TEMPLATE = app

# The following define makes your compiler emit warnings if you use
# any feature of Qt which has been marked as 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


SOURCES += \
        main.cpp \
        widget.cpp

HEADERS += \
        widget.h

FORMS += \
        widget.ui


# 以下为主要部分

INCLUDEPATH += $$(HALCONROOT)/include/ \
               $$(HALCONROOT)/include/halconcpp \
               C:/opencv/build/include/ \
               C:/opencv/build/include/opencv \
               C:/opencv/build/include/opencv2



win32: LIBS += -L$$(HALCONROOT)/lib/$$(HALCONARCH)/ \
               -lhalconcpp \
               -lhalcon \
               -LC:/opencv/build/x64/vc14/lib/ \
               -lopencv_world401d

二、widget.cpp代码

#include "widget.h"
#include "ui_widget.h"
#include "HalconCpp.h"
#include <QDebug>
#include <QFileDialog>
#include <QMessageBox>
#include <opencv2/opencv.hpp>


using namespace HalconCpp;

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);
}

Widget::~Widget()
{
    delete ui;
}

void Widget::on_pushButton_clicked()
{
    // 使用halcon显示图片

    HObject himage1;
    QString str = "C:/Users/lenovo/Pictures/Saved Pictures/Lena.png";

    //读取图片
    HalconCpp::ReadImage(&himage1,HTuple(str.toStdString().c_str()));
    HImage Image(HTuple(str.toStdString().c_str()));
    Hlong width, height;
    Image.GetImageSize(&width, &height);
    HWindow w(0, 0, width, height);
    Image.DispImage(w);
    w.Click();
    w.ClearWindow();
}
void Widget::on_pB_dispImage_OpenCV_clicked()
{
    // 使用OpenCV显示图片
    cv::Mat img = cv::imread("C:/Users/lenovo/Pictures/Saved Pictures/Lena.png");
    cv::namedWindow("Lena");
    cv::imshow("Lena", img);
}

void Widget::on_pB_dispImage_clicked()
{
    // 显示图片(label)
    cv::Mat srcImage, gray_image, srcImage1;
    QString Fileadd = QFileDialog::getOpenFileName(this, "get file");
    if(Fileadd.isEmpty())
    {
        QMessageBox::information(this, "警告","没有选择文件");
        return;
    }
    srcImage = cv::imread(Fileadd.toLatin1().data());   //读取图片
    cv::cvtColor(srcImage, srcImage1, cv::COLOR_BGR2RGB);   //图像转换格式

    QImage distImage = QImage((const unsigned char*)(srcImage1.data), srcImage1.cols, srcImage1.rows, QImage::Format_RGB888);
    ui->label->setPixmap(QPixmap::fromImage(distImage).scaled(ui->label->size(), Qt::KeepAspectRatio));

}

void Widget::on_pB_dispImage_2_clicked()
{
    // 显示图片(graphicsView)

    QString fileName = QFileDialog::getOpenFileName(this, tr("Open Image"), ".", tr("Image File(*.png *.jpg *.jpeg *.bmp)"));
    if(fileName.isEmpty())
    {
        return;
    }
    cv::Mat srcImage = cv::imread(fileName.toLatin1().data());  // 读取图片数据
    cv::cvtColor(srcImage, srcImage, cv::COLOR_BGR2RGB);    // 图像格式转换
    QImage disImage = QImage((const unsigned char*)(srcImage.data), srcImage.cols, srcImage.rows, QImage::Format_RGB888);
    QGraphicsScene *scene = new QGraphicsScene;     // 图像显示
    scene->addPixmap(QPixmap::fromImage(disImage));
    ui->graphicsView->setScene(scene);
    ui->graphicsView->show();
}