[TASK] Implement Task#2 Sub 1.
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@ -142,6 +142,78 @@ void ImageViewer::acidTrippin() {
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}
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}
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/**
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* Analyze the image, get average luminance
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* Also fill grayscale_absolute_histogramm
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* @brief ImageViewer::analyzeImage
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*/
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void ImageViewer::analyzeImage() {
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if(image!=NULL) {
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//Zero existing histogramm data first
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for(int i=0; i<256; i++) {
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grayscale_absolute_histogramm[i] = 0;
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grayscale_relative_histogramm[i] = 0;
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}
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logFile << "Analyzing image ...";
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renewLogging();
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for(int x=0; x<image->width(); x++) {
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for(int y=0; y<image->height(); y++) {
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logFile << "(" << x << "," << y << "): ";
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int r,g,b;
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QColor color = QColor::fromRgb(image->pixel(x, y));
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color.getRgb(&r,&g,&b);
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logFile << "(" << r << "," << g << "," << b << ")";
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int intensity = (int)(0.299*r+0.587*g+0.114*b);
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logFile << "(" << intensity << ")";
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grayscale_absolute_histogramm[intensity] += 1;
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logFile << std::endl;
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}
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}
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int pixels = image->width()*image->height();
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for(int i=0; i<256; i++) {
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grayscale_relative_histogramm[i] = ((1.0*grayscale_absolute_histogramm[i])/(1.0*pixels));
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}
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logFile << "done" << std::endl;
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logFile << "Average intensity: " << getAverageIntensity() << std::endl;
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logFile << "Intensity variance: " << getIntensityVariance() << std::endl;
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renewLogging();
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}
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}
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/**
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* Use histogramm to retrieve the average intensity.
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* @brief ImageViewer::getAverageIntensity
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*/
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int ImageViewer::getAverageIntensity() {
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double sumIntensity = 0;
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for(int i=0; i<256;i++) {
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sumIntensity += (i*grayscale_relative_histogramm[i]);
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}
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return (int)sumIntensity;
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}
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/**
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* Retrieve the intensity variance from the image.
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* @brief ImageViewer::getVarianceIntensity
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*/
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int ImageViewer::getIntensityVariance() {
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int average_intensity = getAverageIntensity();
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int sumDifference = 0;
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for(int x=0; x<image->width(); x++) {
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for(int y=0; y<image->height(); y++) {
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QColor color = QColor::fromRgb(image->pixel(x, y));
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int r,g,b;
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color.getRgb(&r,&g,&b);
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int intensity = (int)(0.299*r+0.587*g+0.114*b);
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int diff = std::abs(intensity - average_intensity);
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sumDifference += diff;
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}
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}
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return (int) (sumDifference/(image->width()*image->height()));
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}
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/****************************************************************************************
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*
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@ -155,21 +227,21 @@ void ImageViewer::generateControlPanels() {
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task_tab1 = new QVBoxLayout();
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task_tab_widget1->setLayout(task_tab1);
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button1 = new QPushButton();
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button1->setText("Draw a black line");
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QObject::connect(button1, SIGNAL(clicked()), this, SLOT (drawBlackLine()));
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task_tab1_button1 = new QPushButton();
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task_tab1_button1->setText("Draw a black line");
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QObject::connect(task_tab1_button1, SIGNAL(clicked()), this, SLOT (drawBlackLine()));
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button2 = new QPushButton();
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button2->setText("Draw a rainbow cross");
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QObject::connect(button2, SIGNAL(clicked()), this, SLOT (drawRainbowCross()));
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task_tab1_button2 = new QPushButton();
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task_tab1_button2->setText("Draw a rainbow cross");
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QObject::connect(task_tab1_button2, SIGNAL(clicked()), this, SLOT (drawRainbowCross()));
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button3 = new QPushButton();
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button3->setText("Start the neverending acid trip!");
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QObject::connect(button3, SIGNAL(clicked()), this, SLOT (acidTrippin()));
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task_tab1_button3 = new QPushButton();
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task_tab1_button3->setText("Start the neverending acid trip!");
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QObject::connect(task_tab1_button3, SIGNAL(clicked()), this, SLOT (acidTrippin()));
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button4 = new QPushButton();
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button4->setText("Draw a diagonal cross");
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QObject::connect(button4, SIGNAL(clicked()), this, SLOT (drawDiagonalCross()));
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task_tab1_button4 = new QPushButton();
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task_tab1_button4->setText("Draw a diagonal cross");
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QObject::connect(task_tab1_button4, SIGNAL(clicked()), this, SLOT (drawDiagonalCross()));
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lineSlider = new QSlider(Qt::Horizontal);
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lineSlider->setMinimum(1);
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@ -178,10 +250,10 @@ void ImageViewer::generateControlPanels() {
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//QObject::connect(lineSlider, SIGNAL(valueChanged(int)), this, SLOT (drawRainbowCross()));
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task_tab1->addWidget(new QLabel("Let's draw something!"));
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task_tab1->addWidget(button1);
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task_tab1->addWidget(button2);
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task_tab1->addWidget(button3);
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task_tab1->addWidget(button4);
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task_tab1->addWidget(task_tab1_button1);
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task_tab1->addWidget(task_tab1_button2);
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task_tab1->addWidget(task_tab1_button3);
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task_tab1->addWidget(task_tab1_button4);
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task_tab1->addWidget(new QLabel("This will not stop unless process is killed."));
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task_tab1->addWidget(lineSlider);
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task_tab1->addWidget(new QLabel("Sets the width of the cross."));
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@ -190,17 +262,21 @@ void ImageViewer::generateControlPanels() {
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//Tab for second task
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task_tab2_button1 = new QPushButton();
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task_tab2_button1->setText("Analyze image");
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QObject::connect(task_tab2_button1, SIGNAL(clicked()), this, SLOT (analyzeImage()));
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QLabel* task_tab2_stats = new QLabel();
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task_tab_widget2 = new QWidget();
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task_tab2 = new QVBoxLayout();
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task_tab_widget2->setLayout(task_tab2);
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spinbox1 = new QSpinBox(tabWidget);
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task_tab2->addWidget(new QLabel("Here we put some more controls later."));
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task_tab2->addWidget(spinbox1);
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task_tab2->addWidget(task_tab2_button1);
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task_tab2->addWidget(task_tab2_stats);
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tabWidget->addTab(task_tab_widget2,"Task #2");
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//tabWidget->show();
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tabWidget->show();
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}
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@ -70,10 +70,10 @@ class ImageViewer : public QMainWindow {
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QWidget* task_tab_widget1;
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QVBoxLayout* task_tab1;
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QPushButton* button1;
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QPushButton* button2;
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QPushButton* button3;
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QPushButton* button4;
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QPushButton* task_tab1_button1;
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QPushButton* task_tab1_button2;
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QPushButton* task_tab1_button3;
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QPushButton* task_tab1_button4;
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QSlider* lineSlider;
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@ -81,7 +81,12 @@ class ImageViewer : public QMainWindow {
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QWidget* task_tab_widget2;
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QVBoxLayout* task_tab2;
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QSpinBox* spinbox1;
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QPushButton* task_tab2_button1;
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QLabel* task_tab2_stats;
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// "My" space for storing data/results
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int grayscale_absolute_histogramm[256];
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double grayscale_relative_histogramm[256];
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private slots:
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@ -90,7 +95,8 @@ class ImageViewer : public QMainWindow {
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void drawRainbowCross();
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void drawDiagonalCross();
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void acidTrippin();
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void analyzeImage();
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void open();
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void print();
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void zoomIn();
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@ -110,6 +116,8 @@ class ImageViewer : public QMainWindow {
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private:
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// Custom methods
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void drawRainbowCross(int h);
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int getAverageIntensity();
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int getIntensityVariance();
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void generateControlPanels();
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void startLogging();
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