Qt--拼接图像

àì夳堔傛蜴生んèń 2022-11-28 10:53 254阅读 0赞

### 拼接图像 ###

*  1、原理
 *  2、代码
 *  3、结果

# 1、原理 #

> 将两张图片重新绘制在一张空白图上（按上下位置拼接）

# 2、代码 #

mainwindow.h

#ifndef MAINWINDOW_H
    #define MAINWINDOW_H
    
    #include <QPixmap>
    #include <QPainter>
    #include <QMainWindow>
    
    namespace Ui { 
    class MainWindow;
    }
    
    class MainWindow : public QMainWindow
    { 
        Q_OBJECT
    
    public:
        explicit MainWindow(QWidget *parent = 0);
        ~MainWindow();
    
        QPixmap stitchPixmap(QPixmap srcPix1, QPixmap srcPix2); //按上下位置拼接图像
    
    private:
        Ui::MainWindow *ui;
    
        /* * 存储上面的图片 */
        QPixmap m_upPixmap;
    
        /* * 存储下面的图片 */
        QPixmap m_downPixmap;
    };
    
    #endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.h"
    #include "ui_mainwindow.h"
    
    MainWindow::MainWindow(QWidget *parent) :
        QMainWindow(parent),
        ui(new Ui::MainWindow)
    { 
        ui->setupUi(this);
    
        //load image
        m_upPixmap.load("1.jpeg");
        m_downPixmap.load("1.jpeg");
    
        //set mainwindow's size
        this->setFixedSize(m_upPixmap.width(), m_upPixmap.height() * 2);
    
        //stitch image
        QPixmap stitchPix = stitchPixmap(m_upPixmap, m_downPixmap);
    
        //show image
        ui->label->setPixmap(stitchPix);
    }
    
    MainWindow::~MainWindow()
    { 
        delete ui;
    }
    
    //拼接
    QPixmap MainWindow::stitchPixmap(QPixmap srcPix1, QPixmap srcPix2)
    { 
        QPixmap stitchPix(srcPix1.width(), srcPix1.height() + srcPix2.height());
        QPainter p(&stitchPix);
    
        //绘制两幅小图到QPixmap上
        p.drawPixmap(0, 0, srcPix1.width(), srcPix1.height(), srcPix1);
        p.drawPixmap(0, srcPix1.height(), srcPix2.width(), srcPix2.height(), srcPix2);
    
        return stitchPix;
    }

# 3、结果 #

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjcwNDA5MA_size_16_color_FFFFFF_t_70_pic_center]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjcwNDA5MA_size_16_color_FFFFFF_t_70_pic_center]: /images/20221124/aa482e30f3e84c188efe53dc403fc9b7.png