Added cvImage to the repository.

Author: karlphillip

cvImage/cvImage.cpp

@@ -0,0 +1,142 @@
+#include "cvImage.h"
+
+#include <QDebug>
+#include <QLabel>
+#include <QPainter>
+#include <QFileDialog>
+#include <QApplication>
+#include <QStatusBar>
+
+#include <cv.h>
+
+
+cvImage::cvImage()
+: _menu(NULL), _image(NULL)
+{
+    setWindowTitle(tr("QT Image demo with OpenCV"));
+    resize(480, 240);
+
+    _menu = new QMenu("File");
+    _menu->addAction("Op3n", this, SLOT(_open()));
+    _menu->addSeparator();
+    _menu->addAction("Ex1t", this, SLOT(close()));
+    _menu_bar.addMenu(_menu);
+
+    setMenuBar(&_menu_bar);
+}
+
+cvImage::~cvImage()
+{
+    if (_menu)
+        delete _menu;
+
+    if (_image)
+        delete _image;
+}
+
+void cvImage::paintEvent(QPaintEvent* e)
+{
+    QPainter painter(this);
+
+    // When no image has been loaded, there's nothing to draw.
+    if (!_image)
+        return;
+
+    painter.drawImage(QPoint(0, 0), *_image);
+
+    QWidget::paintEvent(e);
+}
+
+void cvImage::_open()
+{
+    // Display dialog so the user can select a file
+    QString filename = QFileDialog::getOpenFileName(this,
+                                                    tr("Open Image"),
+                                                    QDir::currentPath(),
+                                                    tr("Files (*.png *.jpg *.tiff *.bmp)"));
+
+    if (filename.isEmpty()) // Do nothing if filename is empty
+        return;
+
+    cv::Mat img = cv::imread(filename.toStdString());
+    if (img.empty())
+        return;
+
+    // Since OpenCV uses BGR order, we need to convert it to RGB
+    cv::cvtColor(img, img, CV_BGR2RGB);
+
+    // _image is created according to video dimensions
+    if (_image)
+    {
+        delete _image;
+    }
+    _image = new QImage(img.size().width, img.size().height, QImage::Format_RGB888);
+
+    // Copy cv::Mat to QImage
+    qMemCopy(_image->scanLine(0), (unsigned char*)img.data, _image->width() * _image->height() * img.channels());
+
+    // Set the filename as the window title
+    setWindowTitle(filename);
+
+    // Resize the window to fit video dimensions
+    resize(img.size().width, img.size().height);
+
+    // Mouse move events will occur only when a mouse button is pressed down,
+    // unless mouse tracking has been enabled:
+    QWidget::setMouseTracking(true);
+
+    // Trigger paint event to redraw the window
+    update();
+}
+
+void cvImage::keyPressEvent(QKeyEvent* event)
+{
+    switch (event->key())
+    {
+        // ESC: exit application
+        case Qt::Key_Escape:
+        {
+            close();
+        }
+        break;
+    }
+}
+
+void cvImage::mouseMoveEvent(QMouseEvent *event)
+{
+    if (!_image)
+        return;
+
+    QPoint pos = event->pos();
+    if (pos.x() < 0 || pos.x() >= _image->width())
+        return;
+    if (pos.y() < 0 || pos.y() >= _image->height())
+        return;
+
+    QString pos_x;
+    pos_x = pos_x.setNum(pos.x());
+
+    QString pos_y;
+    pos_y = pos_y.setNum(pos.y());
+
+    QColor pixel(_image->pixel(pos));
+    int r = pixel.red();
+    int g = pixel.green();
+    int b = pixel.blue();
+
+    QString pixel_info = pos_x + "," + pos_y + " R:" + QString().setNum(r) +
+                                               " G:" + QString().setNum(g) +
+                                               " B:" + QString().setNum(b);
+
+    // TODO: set pixel info on status bar instead of window title
+    //this->statusBar()->setStatusTip(pixel_info);
+
+    setWindowTitle(pixel_info);
+
+    qDebug() << "cvImage::mouseMoveEvent " <<  pixel_info;
+}
+
+void cvImage::_close()
+{
+    emit closed();
+}

cvImage/cvImage.h

@@ -0,0 +1,36 @@
+#pragma once
+#include <QMainWindow>
+#include <QMenu>
+#include <QMenuBar>
+#include <QImage>
+#include <QKeyEvent>
+
+#include <highgui.h>
+
+
+class cvImage : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    cvImage();
+    ~cvImage();
+
+    void paintEvent(QPaintEvent* e);
+    void keyPressEvent(QKeyEvent* event);
+    void mouseMoveEvent(QMouseEvent *event);
+
+private:
+    QMenuBar _menu_bar;
+    QMenu* _menu;
+    QImage* _image;
+
+private slots:
+    void _open();
+
+protected:
+    void _close();
+
+signals:
+    void closed();
+};

cvImage/cvImage.pro

@@ -0,0 +1,35 @@
+TEMPLATE = app
+
+QT      += core gui
+
+SOURCES += \
+    main.cpp \
+    cvImage.cpp
+
+HEADERS += \
+    cvImage.h
+
+## OpenCV settings for Mac OS X
+macx {
+    INCLUDEPATH += /usr/local/include/opencv
+
+    LIBS += -L/usr/local/lib/ \
+        -lopencv_core \
+        -lopencv_highgui \
+        -lopencv_imgproc
+}
+
+## OpenCV settings for Windows and OpenCV 2.4.2
+win32 {
+    INCLUDEPATH += "C:\\opencv\\build\\include" \
+                   "C:\\opencv\\build\\include\\opencv" \
+                   "C:\\opencv\\build\\include\\opencv2"
+
+    LIBS += -L"C:\\opencv\\build\\x86\\vc10\\lib" \
+        -lopencv_core242 \
+        -lopencv_highgui242 \
+        -lopencv_imgproc242
+}
+
+# Runs this app automatically after the building has succeeded
+#QMAKE_POST_LINK=./$$TARGET

cvImage/main.cpp

@@ -0,0 +1,17 @@
+#include "cvImage.h"
+
+#include <QApplication>
+
+int main(int argc, char* argv[])
+{
+    QApplication app(argc, argv);
+
+    cvImage win;
+    win.show();
+
+    QObject::connect(&win, SIGNAL(closed()),
+                     &app, SLOT(quit()) );
+
+    return app.exec();
+}
+