QT内label控件通过opencv显示图像

来源：互联网发布：游戏王网络编辑：程序博客网时间：2024/06/12 00:09

1.对pro进行配置，使其能够理解opencv。

INCLUDEPATH+=d:\opencv249\include\opencv\                    d:\opencv249\include\opencv2\                    d:\opencv249\includeLIBS+=d:\opencv249\lib\libopencv_calib3d249.dll.a\        d:\opencv249\lib\libopencv_contrib249.dll.a\        d:\opencv249\lib\libopencv_core249.dll.a\        d:\opencv249\lib\libopencv_features2d249.dll.a\        d:\opencv249\lib\libopencv_flann249.dll.a\        d:\opencv249\lib\libopencv_gpu249.dll.a\        d:\opencv249\lib\libopencv_highgui249.dll.a\        d:\opencv249\lib\libopencv_imgproc249.dll.a\        d:\opencv249\lib\libopencv_legacy249.dll.a\        d:\opencv249\lib\libopencv_ml249.dll.a\        d:\opencv249\lib\libopencv_objdetect249.dll.a\        d:\opencv249\lib\libopencv_video249.dll.a

2.在*.ui内创建两个命令按钮，一个标签。其界面为：

3.配置其.h文件、.cpp文件。

.h文件：

#ifndef MAINWINDOW_H#define MAINWINDOW_H#include <QMainWindow>#include <opencv2/core/core.hpp>#include <opencv2/highgui/highgui.hpp>namespace Ui {class MainWindow;}class MainWindow : public QMainWindow{    Q_OBJECTpublic:    explicit MainWindow(QWidget *parent = 0);    ~MainWindow();    cv::Mat image;      QImage img;private slots:    void on_pushButton_clicked();    void on_pushButton_2_clicked();private:    Ui::MainWindow *ui;};#endif // MAINWINDOW_H

.cpp文件

#include "mainwindow.h"#include "ui_mainwindow.h"#include "mainwindow.h"#include "ui_mainwindow.h"#include <QString>#include <QFileDialog>#include <QMessageBox>#include <opencv/cv.h>#include <QTextCodec>MainWindow::MainWindow(QWidget *parent) :    QMainWindow(parent),    ui(new Ui::MainWindow){    ui->setupUi(this);}MainWindow::~MainWindow(){    delete ui;}void MainWindow::on_pushButton_clicked(){    QString filename = QFileDialog::getOpenFileName(this,tr("Open Image"),"",tr("Image File(*.bmp *.jpg *.jpeg *.png)"));       QTextCodec *code = QTextCodec::codecForName("gb18030");       std::string name = code->fromUnicode(filename).data();       image = cv::imread(name);       if(!image.data)       {           QMessageBox msgBox;           msgBox.setText(tr("image data is null"));           msgBox.exec();       }       else       {           cv::cvtColor(image,image,CV_BGR2RGB);           img = QImage((const unsigned char*)(image.data),image.cols,image.rows, image.cols*image.channels(),  QImage::Format_RGB888);           ui->label->clear();           ui->label->setPixmap(QPixmap::fromImage(img));           //ui->processPushButton->setEnabled(true);           ui->label->resize(ui->label->pixmap()->size());       }}void MainWindow::on_pushButton_2_clicked(){    cv::flip(image,image,1);       img = QImage((const unsigned char*)(image.data),image.cols,image.rows,image.cols*image.channels(),  QImage::Format_RGB888);       ui->label->setPixmap(QPixmap::fromImage(img));}

补充：

image.cols*image.channels()

可以改为image.step.

参考资料：

1.使用Qt显示openCV矩阵图片 http://blog.csdn.net/homechao/article/details/8989641

2. Qt中用QLabel显示OpenCV中Mat图像数据出现扭曲现象的解决 http://lovelittlebean.blog.163.com/blog/static/11658218620125208212189/

2 0