上一篇文章已经实现了如何识别花色和点数，这篇文章主要是用QT给程序加一个可视化界面。

PokerClassify.cpp

由于我之前完全没有接触过QT，所以编写出来的界面很丑，QT在VS里自带一个界面设计师，类似于下图，编写个界面还是很方便的，对相关的控制直接写响应函数就可以了。

qt设计师

添加菜单和标签栏

PorkerClassify::PorkerClassify(QWidget *parent)
    : QMainWindow(parent)
{
    ui.setupUi(this);
    
    //添加子菜单
    myAc1 = new QAction(this);
    myAc1->setText(QString::fromLocal8Bit("open"));
    myAc1->setStatusTip("This is action for open a poker image.");
    myAc1->setShortcut(QKeySequence("Ctrl+8"));//设置快捷键

    myAc2 = new QAction(this);
    myAc2->setText(QString::fromLocal8Bit("classifying"));
    myAc2->setStatusTip("This is action for classfiy pokers.");
    myAc2->setShortcut(QKeySequence("Ctrl+9"));//设置快捷键

    myAc3 = new QAction(this);
    myAc3->setText(QString::fromLocal8Bit("show answer"));
    myAc3->setStatusTip("This is action for show the answer.");
    myAc3->setShortcut(QKeySequence("Ctrl+10"));//设置快捷键

    connect(myAc1, SIGNAL(triggered()), this, SLOT(openFile()));
    //创建一个文件主菜单
    fileMenu = menuBar()->addMenu(QString::fromLocal8Bit("file"));
    fileMenu->addAction(myAc1);
    fileMenu->addSeparator();

    connect(myAc2, SIGNAL(triggered()), this, SLOT(classify()));
    connect(myAc3, SIGNAL(triggered()), this, SLOT(showAnswer()));
    classfiyMenu = menuBar()->addMenu(QString::fromLocal8Bit("classify pokers"));
    classfiyMenu->addAction(myAc2);
    classfiyMenu->addSeparator();
    classfiyMenu->addAction(myAc3);
    classfiyMenu->addSeparator();
    ui.imageLabel->setFrameShape(QFrame::Box);
    ui.answerLabel->setFrameShape(QFrame::Box);

    //绘制图片
}

实现一个从本地文件选取一张要识别图片的效果

void PorkerClassify::openFile() {
    QString pathFile = QFileDialog::getOpenFileName(this,
        tr("Open Image"), " ", tr("Image Files (*.png *.jpg *.bmp)"));
    if (pathFile.isEmpty() == false)
    {
        QFile file(pathFile);
        bool isOK = file.open(QIODevice::ReadOnly);
        if (isOK == true)
        {
#if 0
            //默认只识别utf8编码
            QByteArray array = file.readAll();
            //ui->textEdit->setText(QString(array));
            ui->textEdit->setText(array);
#endif
            QByteArray array;
            while (file.atEnd() == false)
            {
                array += file.readLine();
            }
        }
        ui.imageLabel->setPixmap(QPixmap(pathFile));
        file.close();
        path = pathFile;
    }
}

对扑克牌图片进行识别，调用到前两章写到的函数

void PorkerClassify::classify() {
    string s = path.toStdString();
    Mat image = imread(s);
    Mat newImage;//最后和成的图片
    Mat models;//用来匹配的图片
    vector<string>files;
    vector<vector<Point>> squares, newSquares;
    vector<Mat> porkers, dstPorkers;
    findPorker(image, squares);
    splitCard(squares, image, porkers);
    rotatePorkers(squares, porkers);
    //drawPorker(porkers);
    concatPorker(porkers, newImage);
    findPorkerNEW(newImage, newSquares, squares);
    splitCardNEW(newSquares, newImage, dstPorkers);
    //printSquaresCoordinate(newSquares);
    identifyPorkers(dstPorkers,answer);
}

对识别结果进行显示

void PorkerClassify::showAnswer() {
    int size = answer.size() / 2;
    string s,s2 ;
    s = answer[0];
    int temp = 1;
    for (int i = 1; i < answer.size(); i++) {
        temp++;
        //s = s + " ";
        s = s + answer[i];
        QString q;
        q = QString::fromStdString(answer[i]);
        qDebug() << q;
        if (temp % 2 == 0) {
            temp = 0;
            s = s + "\n";
        }
    }
    s2 = "There are " + to_string(size) + " pokers"+"\n";
    s = s2 + s;
    QString qs;
    qs = QString::fromStdString(s);
    ui.answerLabel->setText(qs);
    QFont ft;
    ft.setPointSize(12);
    ui.answerLabel->setFont(ft);
}

最后的效果如下

识别单张梅花8

识别多张扑克牌

多张有些误差，将红桃10识别成了红桃9，梅花7识别成了黑桃7，其余正确，因为模板数量较小的问题，所以这个误差我还是可以接受的。
到这就完成了整个小程序的开发。现将程序的源码链接放在下面
//download.csdn.net/download/fyueqiao/12072016