added more advanced opencv-qt integration

6 files changed, 305 insertions, 0 deletions

diff --git a/opencv-qt-integration-2/ImageApp.cpp b/opencv-qt-integration-2/ImageApp.cpp
new file mode 100644
index 0000000..5833bd8
--- /dev/null
+++ b/opencv-qt-integration-2/ImageApp.cpp
@@ -0,0 +1,92 @@
+#include <opencv2/imgproc/imgproc.hpp>
+#include <opencv2/highgui/highgui.hpp>
+#include <QtWidgets>
+#include "ImageApp.h"
+
+ImageApp::ImageApp()
+{
+	originalImage = cv::imread("../assets/The_Chapter_House.jpg");
+	if (originalImage.data) {
+		cv::cvtColor(originalImage, originalImage, cv::COLOR_BGR2RGB);
+	}
+	setupUi();
+	showImage(originalImage);
+}
+
+/**
+ * Setup the widgets
+ */
+void ImageApp::setupUi()
+{
+	imageLabel = new QLabel();
+
+	originalButton = new QPushButton("Original");	
+	connect(originalButton, SIGNAL(clicked()), this, SLOT(showOriginalImage()));
+
+	blurButton = new QPushButton("Gaussian Blur");
+	connect(blurButton, SIGNAL(clicked()), this, SLOT(doGaussianBlur()));
+
+	cannyButton = new QPushButton("Canny");
+	connect(cannyButton, SIGNAL(clicked()), this, SLOT(doCanny()));
+
+	quitButton = new QPushButton("Quit");
+	connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));
+
+	buttonsLayout = new QVBoxLayout();
+	buttonsLayout->addWidget(originalButton);
+	buttonsLayout->addWidget(blurButton);
+	buttonsLayout->addWidget(cannyButton);
+	buttonsLayout->addStretch();
+	buttonsLayout->addWidget(quitButton);
+
+	mainLayout = new QHBoxLayout();
+	mainLayout->addWidget(imageLabel);
+
+	if (originalImage.data) {
+		mainLayout->addLayout(buttonsLayout);
+	}
+	setLayout(mainLayout);
+	setWindowTitle("Image Processing with Qt and OpenCV");
+}
+
+/**
+ * Redraw original image
+ */
+void ImageApp::showOriginalImage()
+{
+	showImage(originalImage);
+}
+
+/**
+ * Perform Canny edge detection on original image and display the result
+ */
+void ImageApp::doCanny()
+{
+	cv::Mat gray;
+	cv::cvtColor(originalImage, gray, cv::COLOR_RGB2GRAY);
+	cv::Canny(gray, processedImage, 150, 150);
+	cv::cvtColor(processedImage, processedImage, cv::COLOR_GRAY2RGB);
+	showImage(processedImage);
+}
+
+/**
+ * Perform Gaussian blurring on original image and display the result
+ */
+void ImageApp::doGaussianBlur()
+{
+	cv::GaussianBlur(originalImage, processedImage, cv::Size(15, 15), 0, 0);
+	showImage(processedImage);
+}
+
+/**
+ * Draw OpenCV matrix using QLabel
+ */
+void ImageApp::showImage(cv::Mat img)
+{
+	if (img.data) {
+		QImage _img(img.data, img.cols, img.rows, QImage::Format_RGB888);
+		imageLabel->setPixmap(QPixmap::fromImage(_img));
+	} else {
+		imageLabel->setText("Cannot load the input image!");
+	}
+}
diff --git a/opencv-qt-integration-2/ImageApp.h b/opencv-qt-integration-2/ImageApp.h
new file mode 100644
index 0000000..bdedb9b
--- /dev/null
+++ b/opencv-qt-integration-2/ImageApp.h
@@ -0,0 +1,39 @@
+#ifndef IMAGEAPP_H
+#define IMAGEAPP_H
+
+#include <opencv2/core/core.hpp>
+#include <QWidget>
+
+class QLabel;
+class QVBoxLayout;
+class QHBoxLayout;
+class QPushButton;
+
+class ImageApp : public QWidget
+{
+	Q_OBJECT
+
+public:
+	ImageApp();
+
+private slots:
+	void showOriginalImage();
+	void doCanny();
+	void doGaussianBlur();
+
+private:
+	void setupUi();
+	void showImage(cv::Mat);
+
+	cv::Mat originalImage;
+	cv::Mat processedImage;
+	QLabel *imageLabel;
+	QPushButton *originalButton;
+	QPushButton *blurButton;
+	QPushButton *cannyButton;
+	QPushButton *quitButton;
+	QVBoxLayout *buttonsLayout;
+	QHBoxLayout *mainLayout;
+};
+
+#endif
diff --git a/opencv-qt-integration-2/ImageApp.pro b/opencv-qt-integration-2/ImageApp.pro
new file mode 100644
index 0000000..8a9bb7d
--- /dev/null
+++ b/opencv-qt-integration-2/ImageApp.pro
@@ -0,0 +1,7 @@
+TEMPLATE = app
+TARGET = ImageApp
+QT += core widgets
+HEADERS += ImageApp.h
+SOURCES += ImageApp.cpp main.cpp
+INCLUDEPATH += . /usr/local/include
+LIBS += -L/usr/local/lib -lopencv_core -lopencv_imgproc -lopencv_highgui -lopencv_imgcodecs
diff --git a/opencv-qt-integration-2/README.md b/opencv-qt-integration-2/README.md
new file mode 100644
index 0000000..c6d222b
--- /dev/null
+++ b/opencv-qt-integration-2/README.md
@@ -0,0 +1,39 @@
+OpenCV - Qt Integration
+=======================
+
+This code sample shows you how to do basic image manipulation to an image and display the result using the `QLabel` widget. The code loads `The_Chapter_House.jpg` from the `assets/` directory and provides two buttons to perform some basic manipulation.
+
+![screenshot](http://i.imgur.com/OPCiEw8.png)
+
+To compile and run the code, you need to have Qt 5 installed on your computer. The code is successfully tested on the following environment:
+
+ - Mac OS X Mavericks
+ - Qt 5.3.0
+ - OpenCV 3.0.0
+ - Python 3.4.1
+
+Compiling
+---------
+
+Open `ImageApp.pro` and modify the variables to match with your system. For example, you might need to modify the paths for the includes and libraries especially if you're on Windows.
+
+    INCLUDEPATH += /usr/local/include
+    LIBS += -L/usr/local/lib -lopencv_core -lopencv_highgui -lopencv_imgproc -lopencv_imgcodecs
+
+Change your working directory and compile the code by typing:
+
+    qmake
+    make
+
+If everything is ok, it will produce an executable: `ImageApp` (Linux), `ImageApp.exe` (Windows), or `ImageApp.app` (Mac). Run the executable and you will see the GUI like the screenshot above.
+
+Known Issues
+------------
+
+In `ImageApp.cpp`, the code using relative path to locate the input image:
+
+    img = cv::imread("../assets/The_Chapter_House.jpg");
+
+If the program cannot display the image and shows the "Cannot load the input image!" warning, try to use absolute path instead. For example:
+
+    img = cv::imread("/full/path/to/The_Chapter_House.jpg");
diff --git a/opencv-qt-integration-2/main.cpp b/opencv-qt-integration-2/main.cpp
new file mode 100644
index 0000000..208f75c
--- /dev/null
+++ b/opencv-qt-integration-2/main.cpp
@@ -0,0 +1,10 @@
+#include <QApplication>
+#include "ImageApp.h"
+
+int main(int argc, char** argv)
+{
+	QApplication app(argc, argv);
+	ImageApp imageApp;
+	imageApp.show();
+	app.exec();
+}
diff --git a/opencv-qt-integration-2/moc_ImageApp.cpp b/opencv-qt-integration-2/moc_ImageApp.cpp
new file mode 100644
index 0000000..7ad3b6b
--- /dev/null
+++ b/opencv-qt-integration-2/moc_ImageApp.cpp
@@ -0,0 +1,118 @@
+/****************************************************************************
+** Meta object code from reading C++ file 'ImageApp.h'
+**
+** Created by: The Qt Meta Object Compiler version 67 (Qt 5.3.0)
+**
+** WARNING! All changes made in this file will be lost!
+*****************************************************************************/
+
+#include "ImageApp.h"
+#include <QtCore/qbytearray.h>
+#include <QtCore/qmetatype.h>
+#if !defined(Q_MOC_OUTPUT_REVISION)
+#error "The header file 'ImageApp.h' doesn't include <QObject>."
+#elif Q_MOC_OUTPUT_REVISION != 67
+#error "This file was generated using the moc from 5.3.0. It"
+#error "cannot be used with the include files from this version of Qt."
+#error "(The moc has changed too much.)"
+#endif
+
+QT_BEGIN_MOC_NAMESPACE
+struct qt_meta_stringdata_ImageApp_t {
+    QByteArrayData data[5];
+    char stringdata[51];
+};
+#define QT_MOC_LITERAL(idx, ofs, len) \
+    Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET(len, \
+    qptrdiff(offsetof(qt_meta_stringdata_ImageApp_t, stringdata) + ofs \
+        - idx * sizeof(QByteArrayData)) \
+    )
+static const qt_meta_stringdata_ImageApp_t qt_meta_stringdata_ImageApp = {
+    {
+QT_MOC_LITERAL(0, 0, 8),
+QT_MOC_LITERAL(1, 9, 17),
+QT_MOC_LITERAL(2, 27, 0),
+QT_MOC_LITERAL(3, 28, 7),
+QT_MOC_LITERAL(4, 36, 14)
+    },
+    "ImageApp\0showOriginalImage\0\0doCanny\0"
+    "doGaussianBlur"
+};
+#undef QT_MOC_LITERAL
+
+static const uint qt_meta_data_ImageApp[] = {
+
+ // content:
+       7,       // revision
+       0,       // classname
+       0,    0, // classinfo
+       3,   14, // methods
+       0,    0, // properties
+       0,    0, // enums/sets
+       0,    0, // constructors
+       0,       // flags
+       0,       // signalCount
+
+ // slots: name, argc, parameters, tag, flags
+       1,    0,   29,    2, 0x08 /* Private */,
+       3,    0,   30,    2, 0x08 /* Private */,
+       4,    0,   31,    2, 0x08 /* Private */,
+
+ // slots: parameters
+    QMetaType::Void,
+    QMetaType::Void,
+    QMetaType::Void,
+
+       0        // eod
+};
+
+void ImageApp::qt_static_metacall(QObject *_o, QMetaObject::Call _c, int _id, void **_a)
+{
+    if (_c == QMetaObject::InvokeMetaMethod) {
+        ImageApp *_t = static_cast<ImageApp *>(_o);
+        switch (_id) {
+        case 0: _t->showOriginalImage(); break;
+        case 1: _t->doCanny(); break;
+        case 2: _t->doGaussianBlur(); break;
+        default: ;
+        }
+    }
+    Q_UNUSED(_a);
+}
+
+const QMetaObject ImageApp::staticMetaObject = {
+    { &QWidget::staticMetaObject, qt_meta_stringdata_ImageApp.data,
+      qt_meta_data_ImageApp,  qt_static_metacall, 0, 0}
+};
+
+
+const QMetaObject *ImageApp::metaObject() const
+{
+    return QObject::d_ptr->metaObject ? QObject::d_ptr->dynamicMetaObject() : &staticMetaObject;
+}
+
+void *ImageApp::qt_metacast(const char *_clname)
+{
+    if (!_clname) return 0;
+    if (!strcmp(_clname, qt_meta_stringdata_ImageApp.stringdata))
+        return static_cast<void*>(const_cast< ImageApp*>(this));
+    return QWidget::qt_metacast(_clname);
+}
+
+int ImageApp::qt_metacall(QMetaObject::Call _c, int _id, void **_a)
+{
+    _id = QWidget::qt_metacall(_c, _id, _a);
+    if (_id < 0)
+        return _id;
+    if (_c == QMetaObject::InvokeMetaMethod) {
+        if (_id < 3)
+            qt_static_metacall(this, _c, _id, _a);
+        _id -= 3;
+    } else if (_c == QMetaObject::RegisterMethodArgumentMetaType) {
+        if (_id < 3)
+            *reinterpret_cast<int*>(_a[0]) = -1;
+        _id -= 3;
+    }
+    return _id;
+}
+QT_END_MOC_NAMESPACE