Qt之一个显示小任务

//mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QtWidgets/QMainWindow>
#include "ui_mainwindow.h"
#include <OpenCV245.h>
#include <QFileDialog>
#include <QImage>

class MainWindow : public QMainWindow
{
	Q_OBJECT

public:
	MainWindow(QWidget *parent = 0);
	~MainWindow();

private slots:
	void OpenImage();
	void Process();

private:
	Ui::MainWindowClass ui;

	cv::Mat image;
};

#endif // MAINWINDOW_H


//mainwindow.cpp
#include "mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
	: QMainWindow(parent)
{
	ui.setupUi(this);
	ui.pushButton_2->setEnabled(false);
}

MainWindow::~MainWindow()
{

}

void MainWindow::OpenImage()
{
	QString fileName = QFileDialog::getOpenFileName(this, tr("Open Image"), ".",
		tr("Image Files (*.png *.jpg *.jpeg *.bmp)"));
	image = cv::imread(fileName.toLatin1().data());
	if (image.data)
	{
		ui.pushButton_2->setEnabled(true);
		cv::namedWindow("Original Image");
		cv::imshow("Original Image", image);
	}
	else
	{

	}
	
}

void MainWindow::Process()
{
	cv::flip(image, image, 1);
	cv::cvtColor(image, image, CV_BGR2RGB);
	QImage img = QImage((const unsigned char*)(image.data), image.cols, image.rows, QImage::Format_RGB888);
	ui.label->setPixmap(QPixmap::fromImage(img));
	ui.label->resize(ui.label->pixmap()->size());
	/*cv::namedWindow("Output Image");
	cv::imshow("Output Image", image);*/
}

//main.cpp
#include "mainwindow.h"
#include <QtWidgets/QApplication>

int main(int argc, char *argv[])
{
	QApplication a(argc, argv);
	MainWindow w;
	w.show();
	return a.exec();
}

实现的功能是显示一图片，并将图片反转