opencv学习之路(1)：图像的载入和转换

#include "dialog.h"
#include "ui_dialog.h"
#include "qfiledialog.h"
#include "qdebug.h"
Dialog::Dialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::Dialog)
{
    ui->setupUi(this);
}

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

void Dialog::on_pBtnLoadImage_clicked()
{
    QString file = QFileDialog::getOpenFileName(this,"Open Image",".","Image Files(*.png *.jpg *.jpeg *.bmp);;All Files(*)");
    if(!file.isNull())
    {
    qDebug()<<file;
    image = cv::imread(file.toStdString());
    cv::imshow("Original",image);
    }
}

void Dialog::on_pBtnFlip_clicked()
{
    static int flag=1;
    flag=flag>0?0:1;
    qDebug()<<"flag="<<flag;
    cv::flip(image,image,flag);
    cv::imshow("Output Image",image);
}

　　第二种界面：

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "qfiledialog.h"
#include "qdebug.h"
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
}

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

void MainWindow::on_pBtnLoadImage_clicked()
{
    QString file = QFileDialog::getOpenFileName(this,"OPen Image",".","Image file(*.jpg *.png *.bmp);;All files(*)");
    if(!file.isNull())
    {
        image = cv::imread(file.toStdString());
        cv::cvtColor(image,image,CV_BGR2RGB);
        qDebug()<<"Image"<<image.depth();
        ShowImage();
    }
}

void MainWindow::on_pBtnFlip_clicked()
{
    static int flag=1;
    cv::flip(image,image,flag);
    flag = flag>0 ? 0 : 1;
    ShowImage();
}
void MainWindow::ShowImage()
{
    QImage img=QImage(image.data,image.cols,image.rows,QImage::Format_RGB888);
    ui->lbShowImage->setPixmap(QPixmap::fromImage(img));
    ui->lbShowImage->resize(img.size());
}