Qt 使用halcon显示一张图片

1.编写halcon程序

read_image (Image, 'E:/Images/lenna.bmp')//读取图片
get_image_size (Image, Width, Height)
dev_open_window (0, 0, Width, Height, 'black', WindowHandle)//创建一个窗口
dev_display (Image)

2.将halcon导出成c++代码，下面的代码是导出后有用的代码段

// Main procedure 
void action()
{

  // Local iconic variables
  HObject  ho_Image;

  // Local control variables
  HTuple  hv_Width, hv_Height, hv_WindowHandle;

  ReadImage(&ho_Image, "E:/Images/lenna.bmp");
  GetImageSize(ho_Image, &hv_Width, &hv_Height);
  SetWindowAttr("background_color","black");
  OpenWindow(0,0,hv_Width,hv_Height,0,"visible","",&hv_WindowHandle);
  HDevWindowStack::Push(hv_WindowHandle);
  if (HDevWindowStack::IsOpen())
    DispObj(ho_Image, HDevWindowStack::GetActive());
}

3.创建一个Qt项目并配置好halcon（查找Qt如何halcon）

在wideget.h中声明变量

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <QLabel>
#include <QPushButton>
#include "halconcpp\HalconCpp.h"
using namespace HalconCpp;
#pragma execution_character_set("utf-8") //支持中文//有问题这段使用中文，不用理会


class Widget : public QWidget
{
    Q_OBJECT

public:
    Widget(QWidget *parent = nullptr);
    ~Widget();

private:
    QLabel *label;
    HObject  ho_Image;
    HTuple  hv_Width, hv_Height;
    HTuple hv_WindowHandle;
};
#endif // WIDGET_H

修改main.cpp代码，也就是改了下窗口哦标题和大小

#include "widget.h"

#include <QApplication>
#include <QPalette>
#include <QWidget>
#include <QMessageBox>
# include <stdio.h>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    w.setFixedSize(1000,600);//设置窗口的大小
    w.setWindowTitle("halcon_img");//设置窗口标题
    w.show();
    return a.exec();
}

修改widget.cpp代码为

#include "widget.h"

Widget::Widget(QWidget *parent)
    : QWidget(parent)
{
    label = new QLabel(this);
    label->setGeometry(400,10,500,500);
    //label->setText("Hello World");
    //QPixmap pixmap("F:/YiBuSheQu/learnOpenCV/learnOpenCV/lena.png");
    //label->setPixmap(pixmap);


    Hlong  MainWndID = (Hlong)this->label->winId();
    OpenWindow(0, 0, label->width(), label->height(), MainWndID, "visible", "", &hv_WindowHandle);
    ReadImage(&ho_Image, "F:/YiBuSheQu/learnOpenCV/learnOpenCV/noobcv.jpg");
    GetImageSize(ho_Image, &hv_Width, &hv_Height);
    SetPart(hv_WindowHandle, 0, 0, hv_Height, hv_Width);
    DispObj(ho_Image, hv_WindowHandle);

}

Widget::~Widget()
{
}

重新构建项目运行