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mainwindow.cpp
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mainwindow.cpp
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#include "mainwindow.h"
#include "ui_mainwindow.h"
#include<QFileDialog>
#include<QDir>
#include<QDirIterator>
#include<QImage>
#include<QRgb>
#include<QtMath>
#include<QByteArray>
#include<QBitArray>
#include<QScrollBar>
#include<QPainter>
#include<vector>
#include<map>
#include<cmath>
#include "dialogbinarization.h"
#include "dialogotsulocal.h"
#include "dialogquantization.h"
#include "dialogbasecolorcorrection.h"
#include "dialoghistogramequalization.h"
#include "dialoggammacorrection.h"
#include "dialogpiecewiselinear.h"
#include "dialogzoom.h"
#include<QDebug>
void calcHist(QPixmap &pixmap, std::vector<int> &hist, int &maxLevel)
{
QImage image = pixmap.toImage();
const int histSize = 256;
hist.assign(histSize, 0);
maxLevel = -1;
for (int y = 0; y < image.height(); ++y)
for (int x = 0; x < image.width(); ++x)
{
QColor oldColor(image.pixel(x, y));
int gray = oldColor.value();
++hist[gray];
if (hist[gray] > maxLevel)
maxLevel = hist[gray];
}
}
void drawHist(QGraphicsPixmapItem *pixmapItem, std::vector<int> &hist, int maxLevel)
{
QGraphicsScene *scene = pixmapItem->scene();
QGraphicsView *view = scene->views()[0];
int width = view->contentsRect().width();
int height = view->contentsRect().height();
QColor black(0, 0, 0);
QColor white(255, 255, 255);
QColor red(255, 0, 0);
QImage image(width, height, QImage::Format_ARGB32);
image.fill(white);
QPainter p(&image);
double shift = (double) image.width() / hist.size();
double step = (double) image.height() / maxLevel;
for (unsigned int i = 0; i < hist.size(); ++i)
{
if (i == 0 || i == hist.size() - 1)
{
p.setPen(red);
p.setBrush(QBrush(red));
}
else if (i == 1)
{
p.setPen(black);
p.setBrush(QBrush(black));
}
if (hist[i] == 0)
continue;
int curHeight = hist[i] * step;
p.drawRect(qFloor(i * shift), qFloor(image.height() - curHeight), qFloor(shift), qFloor(curHeight));
}
pixmapItem->setPixmap(QPixmap::fromImage(image));
scene->setSceneRect(QRectF(image.rect()));
}
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
maxLevel = 0;
maxLevel_2 = 0;
this->setWindowTitle(tr("Kazaryan Paint"));
scene = new QGraphicsScene(this);
pixmapItem = scene->addPixmap(QPixmap());
ui->graphicsView->setScene(scene);
scene_2 = new QGraphicsScene(this);
pixmapItem_2 = scene_2->addPixmap(QPixmap());
ui->graphicsView_2->setScene(scene_2);
ui->graphicsView->installEventFilter(this);
ui->graphicsView_2->installEventFilter(this);
ui->graphicsView_3->installEventFilter(this);
ui->graphicsView_4->installEventFilter(this);
//
sceneHist = new QGraphicsScene(this);
pixmapItem_3 = sceneHist->addPixmap(QPixmap());
ui->graphicsView_3->setScene(sceneHist);
sceneHist_2 = new QGraphicsScene(this);
pixmapItem_4 = sceneHist_2->addPixmap(QPixmap());
ui->graphicsView_4->setScene(sceneHist_2);
mA.assign(64, std::vector<double>(64, 0));
for (int i = 0; i < 64; ++i)
for (int j = 0; j < 64; ++j)
{
QBitArray b1(8);
writeBits(i, b1, 0, 7);
QBitArray b2(8);
writeBits(j, b2, 0, 7);
int r = 0;
for (int k = 0; k < b1.size(); ++k)
r += (int) (b1[k] ^ b2[k]);
mA[i][j] = r / 8.0;
}
// Connections
connect(ui->graphicsView->horizontalScrollBar(),
SIGNAL(valueChanged(int)),
ui->graphicsView_2->horizontalScrollBar(),
SLOT(setValue(int)));
connect(ui->graphicsView_2->horizontalScrollBar(),
SIGNAL(valueChanged(int)),
ui->graphicsView->horizontalScrollBar(),
SLOT(setValue(int)));
connect(ui->graphicsView->verticalScrollBar(),
SIGNAL(valueChanged(int)),
ui->graphicsView_2->verticalScrollBar(),
SLOT(setValue(int)));
connect(ui->graphicsView_2->verticalScrollBar(),
SIGNAL(valueChanged(int)),
ui->graphicsView->verticalScrollBar(),
SLOT(setValue(int)));
}
MainWindow::~MainWindow()
{
delete sceneHist_2;
delete sceneHist;
delete scene_2;
delete scene;
delete ui;
}
bool MainWindow::eventFilter(QObject *object, QEvent *event)
{
if (ui->checkBox->isChecked() && object == ui->graphicsView && event->type() == QEvent::Paint)
ui->graphicsView->fitInView(pixmapItem, Qt::KeepAspectRatio);
if (ui->checkBox->isChecked() && object == ui->graphicsView_2 && event->type() == QEvent::Paint)
ui->graphicsView_2->fitInView(pixmapItem_2, Qt::KeepAspectRatio);
if (object == ui->graphicsView_3 && event->type() == QEvent::Paint)
drawHist(pixmapItem_3, hist, maxLevel);
if (object == ui->graphicsView_4 && event->type() == QEvent::Paint)
drawHist(pixmapItem_4, hist_2, maxLevel_2);
if (object == ui->graphicsView_2 && event->type() == QEvent::MouseButtonPress)
{
++picturesRind;
int curInd = picturesRind % picturesR.size();
pixmapItem_2->setPixmap(picturesR[curInd]);
scene_2->setSceneRect(QRectF(picturesR[curInd].rect()));
}
return false;
}
void MainWindow::on_actionLoad_triggered()
{
QString fileName = QFileDialog::getOpenFileName(this, tr("Open Image"));
QPixmap pixmap(fileName);
if ( ! pixmap.isNull() )
{
pixmapItem->setPixmap(pixmap);
scene->setSceneRect(QRectF(pixmap.rect()));
QPixmap pixmapEmpty;
pixmapItem_2->setPixmap(pixmapEmpty);
scene_2->setSceneRect(QRectF(pixmapEmpty.rect()));
calcHist(pixmap, hist, maxLevel);
drawHist(pixmapItem_3, hist, maxLevel);
hist_2.assign(256, 0);
drawHist(pixmapItem_4, hist_2, maxLevel_2);
}
else
ui->statusBar->showMessage(tr("File loading error"), 3000);
}
void MainWindow::on_actionGrayscale_triggered()
{
QPixmap pixmap = pixmapItem->pixmap().copy();
QImage image = pixmap.toImage();
for (int y = 0; y < image.height(); ++y)
for (int x = 0; x < image.width(); ++x)
{
QRgb oldColor = image.pixel(x, y);
int gray = qPow(
0.2126 * qPow(qRed(oldColor), 2.2) +
0.7152 * qPow(qGreen(oldColor), 2.2) +
0.0722 * qPow(qBlue(oldColor), 2.2),
1/2.2
);
QRgb newColor = qRgba(gray, gray, gray, qAlpha(oldColor));
image.setPixel(x, y, newColor);
}
pixmap.convertFromImage(image);
pixmapItem_2->setPixmap(pixmap);
scene_2->setSceneRect(QRectF(pixmap.rect()));
calcHist(pixmap, hist_2, maxLevel_2);
drawHist(pixmapItem_4, hist_2, maxLevel_2);
}
void MainWindow::on_actionBinarization_manual_triggered()
{
Dialogbinarization dialog;
if (dialog.exec() == QDialog::Accepted)
{
QPixmap pixmap = pixmapItem->pixmap().copy();
QRgb black = qRgb(0,0,0);
QRgb white = qRgb(255,255,255);
QImage image = pixmap.toImage();
for (int y = 0; y < image.height(); ++y)
for (int x = 0; x < image.width(); ++x)
{
QRgb oldColor = image.pixel(x, y);
int gray = qPow(
0.2126 * qPow(qRed(oldColor), 2.2) +
0.7152 * qPow(qGreen(oldColor), 2.2) +
0.0722 * qPow(qBlue(oldColor), 2.2),
1/2.2
);
QRgb newColor;
if (dialog.methodChosed() == 1)
{
int treshold = dialog.treshold1();
if ( gray < treshold )
newColor = black;
else
newColor = white;
}
else if (dialog.methodChosed() == 2)
{
int treshold = dialog.treshold1();
if ( gray > treshold )
newColor = black;
else
newColor = white;
}
else
{
int treshold1 = dialog.treshold1();
int treshold2 = dialog.treshold2();
if ( treshold1 < gray && gray <= treshold2 )
newColor = black;
else
newColor = white;
}
image.setPixel(x, y, newColor);
}
pixmap.convertFromImage(image);
pixmapItem_2->setPixmap(pixmap);
scene_2->setSceneRect(QRectF(pixmap.rect()));
calcHist(pixmap, hist_2, maxLevel_2);
drawHist(pixmapItem_4, hist_2, maxLevel_2);
}
}
int MainWindow::otsu(QImage &image, std::vector<int> &grays, int startX, int startY, int endX, int endY)
{
for (int y = startY; y < endY; ++y)
for (int x = startX; x < endX; ++x)
{
QRgb oldColor = image.pixel(x, y);
int gray = qPow(
0.2126 * qPow(qRed(oldColor), 2.2) +
0.7152 * qPow(qGreen(oldColor), 2.2) +
0.0722 * qPow(qBlue(oldColor), 2.2),
1/2.2
);
grays[x + y * (endX - startX)] = gray;
}
std::vector<int> hist(256, 0);
int graysStart = startX + startY * (endX - startX);
int graysEnd = (endX - 1) + (endY - 1) * (endX - startX) + 1;
for (int i = graysStart; i < graysEnd; ++i)
++hist[grays[i]];
int t = 0;
int t1 = 0;
for (int i = 0; i < 256; ++i)
{
t += i * hist[i];
t1 += hist[i];
}
int alpha = 0;
int beta = 0;
int threshold = 0;
double w1;
double a;
double sigma;
double maxSigma = -1;
for (int i = 0; i < 256; ++i)
{
alpha += i * hist[i];
beta += hist[i];
w1 = (double) beta / t1;
a = (double) alpha / beta - (double) (t - alpha) / (t1 - beta);
sigma = w1 * (1 - w1) * a * a;
if (sigma > maxSigma)
{
maxSigma = sigma;
threshold = i;
}
}
int finalThreshold = threshold;
return finalThreshold;
}
void MainWindow::on_actionOtsu_global_triggered()
{
QPixmap pixmap = pixmapItem->pixmap().copy();
QImage image = pixmap.toImage();
int width = image.width();
int height = image.height();
if (width == 0 || height == 0)
{
ui->statusBar->showMessage( tr("Error. Image bad size"), 3000 );
return;
}
std::vector<int> grays(width * height, 0);
int finalThreshold = otsu(image, grays, 0, 0, width, height);
QRgb black = qRgb(0,0,0);
QRgb white = qRgb(255,255,255);
QRgb newColor;
for (int y = 0; y < height; ++y)
for (int x = 0; x < width; ++x)
{
int gray = grays[x + y * width];
if ( gray < finalThreshold )
newColor = black;
else
newColor = white;
image.setPixel(x, y, newColor);
}
pixmap.convertFromImage(image);
pixmapItem_2->setPixmap(pixmap);
scene_2->setSceneRect(QRectF(pixmap.rect()));
calcHist(pixmap, hist_2, maxLevel_2);
drawHist(pixmapItem_4, hist_2, maxLevel_2);
}
void MainWindow::on_actionSave_triggered()
{
QString fileName = QFileDialog::getSaveFileName(this, tr("Save Image"));
if ( pixmapItem_2->pixmap().save(fileName) )
ui->statusBar->showMessage(tr("File saved successful!"), 3000);
else
ui->statusBar->showMessage(tr("File saving error"), 3000);
}
void MainWindow::on_actionBrightness_gradient_triggered()
{
QPixmap pixmap = pixmapItem->pixmap().copy();
QImage image = pixmap.toImage();
int width = image.width();
int height = image.height();
if (width == 0 || height == 0)
{
ui->statusBar->showMessage( tr("Error. Image bad size"), 3000 );
return;
}
std::vector< std::vector<int> > grays( width, std::vector<int>(height) );
for (int y = 0; y < height; ++y)
for (int x = 0; x < width; ++x)
{
QRgb oldColor = image.pixel(x, y);
int gray = qPow(
0.2126 * qPow(qRed(oldColor), 2.2) +
0.7152 * qPow(qGreen(oldColor), 2.2) +
0.0722 * qPow(qBlue(oldColor), 2.2),
1/2.2
);
grays[x][y] = gray;
}
int G_x;
int G_y;
int G;
unsigned long int dividend = 0;
unsigned int divisor = 0;
for (int y = 0; y < height; ++y)
for (int x = 0; x < width; ++x)
{
if (x == 0)
G_x = grays[x+1][y];
else if (x == width - 1)
G_x = grays[x-1][y];
else
G_x = grays[x+1][y] - grays[x-1][y];
if (y == 0)
G_y = grays[x][y+1];
else if (y == height - 1)
G_y = grays[x][y-1];
else
G_y = grays[x][y+1] - grays[x][y-1];
G = qMax( qAbs(G_x), qAbs(G_y) );
dividend += grays[x][y] * G;
divisor += G;
}
int threshold = dividend / divisor;
if (0 <= threshold && threshold <= 255)
{
QRgb black = qRgb(0,0,0);
QRgb white = qRgb(255,255,255);
QRgb newColor;
for (int y = 0; y < height; ++y)
for (int x = 0; x < width; ++x)
{
int gray = grays[x][y];
if ( gray < threshold )
newColor = black;
else
newColor = white;
image.setPixel(x, y, newColor);
}
}
else
ui->statusBar->showMessage(tr("Error. Invalid threshold"), 3000);
pixmap.convertFromImage(image);
pixmapItem_2->setPixmap(pixmap);
scene_2->setSceneRect(QRectF(pixmap.rect()));
calcHist(pixmap, hist_2, maxLevel_2);
drawHist(pixmapItem_4, hist_2, maxLevel_2);
}
void MainWindow::on_actionOtsu_local_triggered()
{
QPixmap pixmap = pixmapItem->pixmap().copy();
QImage image = pixmap.toImage();
int width = image.width();
int height = image.height();
if (width == 0 || height == 0)
{
ui->statusBar->showMessage( tr("Error. Image bad size"), 3000 );
return;
}
DialogOtsuLocal dialog;
dialog.setSpinBoxes(pixmapItem->pixmap().width(), pixmapItem->pixmap().height());
if (dialog.exec() == QDialog::Rejected)
return;
std::vector<int> grays(width * height, 0);
int countX = dialog.gridX();
int countY = dialog.gridY();
double shiftY = ( (double) height ) / countY;
double shiftX = ( (double) width ) / countX;
double curX = 0.0;
double curY = 0.0;
double nextX = 0.0;
double nextY = 0.0;
int cX;
int cY;
int nX;
int nY;
QRgb black = qRgb(0,0,0);
QRgb white = qRgb(255,255,255);
QRgb newColor;
for (int i = 0; i < countY; ++i)
{
nextY += shiftY;
cY = qFloor(curY);
nY = qFloor(nextY);
curX = 0.0;
nextX = 0.0;
for (int j = 0; j < countX; ++j)
{
nextX += shiftX;
cX = qFloor(curX);
nX = qFloor(nextX);
int threshold = otsu(image, grays, cX, cY, nX, nY);
for (int y = cY; y < nY; ++y)
for (int x = cX; x < nX; ++x)
{
int gray = grays[x + y * (nX - cX)];
if ( gray < threshold )
newColor = black;
else
newColor = white;
image.setPixel(x, y, newColor);
}
curX = nextX;
}
curY = nextY;
}
pixmap.convertFromImage(image);
pixmapItem_2->setPixmap(pixmap);
scene_2->setSceneRect(QRectF(pixmap.rect()));
calcHist(pixmap, hist_2, maxLevel_2);
drawHist(pixmapItem_4, hist_2, maxLevel_2);
}
void MainWindow::on_actionBrightness_quantization_triggered()
{
QPixmap pixmap = pixmapItem->pixmap().copy();
QImage image = pixmap.toImage();
int width = image.width();
int height = image.height();
if (width == 0 || height == 0)
{
ui->statusBar->showMessage( tr("Error. Image bad size"), 3000 );
return;
}
std::vector<int> grays(width * height);
for (int y = 0; y < height; ++y)
for (int x = 0; x < width; ++x)
{
QRgb oldColor = image.pixel(x, y);
int gray = qPow(
0.2126 * qPow(qRed(oldColor), 2.2) +
0.7152 * qPow(qGreen(oldColor), 2.2) +
0.0722 * qPow(qBlue(oldColor), 2.2),
1/2.2
);
grays[x + y * width] = gray;
}
std::vector<unsigned int> Rs(256, 0);
std::vector<unsigned int> Gs(256, 0);
std::vector<unsigned int> Bs(256, 0);
std::vector<int> hist(256, 0);
for (int y = 0; y < height; ++y)
for (int x = 0; x < width; ++x)
{
int num = grays[x + y * width];
Rs[num] += qRed( image.pixel(x, y) );
Gs[num] += qGreen( image.pixel(x, y) );
Bs[num] += qBlue( image.pixel(x, y) );
++hist[num];
}
int quantsCountMaximum = 0;
std::map<int, QRgb> colors;
for (int i = 0; i < 256; ++i)
{
if (hist[i] == 0)
continue;
Rs[i] /= hist[i];
Gs[i] /= hist[i];
Bs[i] /= hist[i];
colors[i] = qRgb(Rs[i], Gs[i], Bs[i]);
++quantsCountMaximum;
}
DialogQuantization dialog;
dialog.setQuantCountMaximum(quantsCountMaximum);
if (dialog.exec() == QDialog::Rejected)
return;
int quantsCount = dialog.quantsCount();
double shift = 256 / quantsCount;
double cur = 0.0;
double next = 0.0;
for (int i = 0; i < quantsCount; ++i)
{
next += shift;
int c = qFloor(cur);
int n = qFloor(next);
int minC = 256;
for (std::map<int, QRgb>::iterator it = colors.begin(); it != colors.end(); ++it)
if (c <= (it->first) && (it->first) < n)
if (it->first < minC)
minC = it->first;
QRgb newColor = colors[minC];
for (int y = 0; y < height; ++y)
for (int x = 0; x < width; ++x)
{
int num = grays[x + y * width];
if (c <= num && num < n)
image.setPixel(x, y, newColor);
else
continue;
}
cur = next;
}
pixmap.convertFromImage(image);
pixmapItem_2->setPixmap(pixmap);
scene_2->setSceneRect(QRectF(pixmap.rect()));
//ui->graphicsView_2->fitInView(scene_2->itemsBoundingRect(), Qt::KeepAspectRatio);
calcHist(pixmap, hist_2, maxLevel_2);
drawHist(pixmapItem_4, hist_2, maxLevel_2);
}
void MainWindow::on_checkBox_toggled(bool checked)
{
if (checked)
{
ui->graphicsView->fitInView(pixmapItem, Qt::KeepAspectRatio);
ui->graphicsView_2->fitInView(pixmapItem_2, Qt::KeepAspectRatio);
}
else
{
ui->graphicsView->resetTransform();
ui->graphicsView_2->resetTransform();
}
}
void MainWindow::on_actionBase_color_correction_triggered()
{
QPixmap pixmap = pixmapItem->pixmap().copy();
QImage image = pixmap.toImage();
int width = image.width();
int height = image.height();
if (width == 0 || height == 0)
{
ui->statusBar->showMessage( tr("Error. Image bad size"), 3000 );
return;
}
DialogBaseColorCorrection dialog;
dialog.setPixmap(pixmap);
if (dialog.exec() == QDialog::Rejected)
return;
for (int y = 0; y < height; ++y)
for (int x = 0; x < width; ++x)
{
QRgb oldColor = image.pixel(x, y);
double red = qRed(oldColor);
double green = qGreen(oldColor);
double blue = qBlue(oldColor);
QColor dst = dialog.destinationColor();
QColor src = dialog.sourceColor();
red *= (double) dst.red() / src.red();
green *= (double) dst.green() / src.green();
blue *= (double) dst.blue() / src.blue();
if (red < 0)
red = 0;
if (red > 255)
red = 255;
if (green < 0)
green = 0;
if (green > 255)
green = 255;
if (blue < 0)
blue = 0;
if (blue > 255)
blue = 255;
image.setPixel(x, y, qRgb(red, green, blue));
}
pixmap.convertFromImage(image);
pixmapItem_2->setPixmap(pixmap);
scene_2->setSceneRect(QRectF(pixmap.rect()));
calcHist(pixmap, hist_2, maxLevel_2);
drawHist(pixmapItem_4, hist_2, maxLevel_2);
}
void MainWindow::on_actionGray_world_triggered()
{
QPixmap pixmap = pixmapItem->pixmap().copy();
QImage image = pixmap.toImage();
int width = image.width();
int height = image.height();
if (width == 0 || height == 0)
{
ui->statusBar->showMessage( tr("Error. Image bad size"), 3000 );
return;
}
double avgRed = 0.0;
double avgGreen = 0.0;
double avgBlue = 0.0;
for (int y = 0; y < height; ++y)
for (int x = 0; x < width; ++x)
{
QRgb oldColor = image.pixel(x, y);
avgRed += qRed(oldColor);
avgGreen += qGreen(oldColor);
avgBlue += qBlue(oldColor);
}
int length = width * height;
avgRed /= length;
avgGreen /= length;
avgBlue /= length;
double avg = (avgRed + avgGreen + avgBlue) / 3;
for (int y = 0; y < height; ++y)
for (int x = 0; x < width; ++x)
{
QRgb oldColor = image.pixel(x, y);
double red = qRed(oldColor) * avg / avgRed;
double green = qGreen(oldColor) * avg / avgGreen;
double blue = qBlue(oldColor) * avg / avgBlue;
if (red < 0)
red = 0;
if (red > 255)
red = 255;
if (green < 0)
green = 0;
if (green > 255)
green = 255;
if (blue < 0)
blue = 0;
if (blue > 255)
blue = 255;
image.setPixel(x, y, qRgb(red, green, blue));
}
pixmap.convertFromImage(image);
pixmapItem_2->setPixmap(pixmap);
scene_2->setSceneRect(QRectF(pixmap.rect()));
calcHist(pixmap, hist_2, maxLevel_2);
drawHist(pixmapItem_4, hist_2, maxLevel_2);
}
void MainWindow::on_actionLinear_triggered()
{
QPixmap pixmap = pixmapItem->pixmap().copy();
QImage image = pixmap.toImage();
int width = image.width();
int height = image.height();
if (width == 0 || height == 0)
{
ui->statusBar->showMessage( tr("Error. Image bad size"), 3000 );
return;
}
int minR = 256;
int maxR = -1;
int minG = 256;
int maxG = -1;
int minB = 256;
int maxB = -1;
for (int y = 0; y < height; ++y)
for (int x = 0; x < width; ++x)
{
QRgb oldColor = image.pixel(x, y);
int red = qRed(oldColor);
int green = qGreen(oldColor);
int blue = qBlue(oldColor);
if (red < minR)
minR = red;
if (red > maxR)
maxR = red;
if (green < minG)
minG = green;
if (green > maxG)
maxG = green;
if (blue < minB)
minB = blue;
if (blue > maxB)
maxB = blue;
}
for (int y = 0; y < height; ++y)
for (int x = 0; x < width; ++x)
{
QRgb oldColor = image.pixel(x, y);
int red = ( qRed(oldColor) - minR) * 255 / (maxR - minR);
int green = ( qGreen(oldColor) - minG) * 255 / (maxG - minG);
int blue = ( qBlue(oldColor) - minB) * 255 / (maxB - minB);
if (red < 0)
red = 0;
if (red > 255)
red = 255;
if (green < 0)
green = 0;
if (green > 255)
green = 255;
if (blue < 0)
blue = 0;
if (blue > 255)
blue = 255;
image.setPixel(x, y, qRgb(red, green, blue));
}
pixmap.convertFromImage(image);
pixmapItem_2->setPixmap(pixmap);
scene_2->setSceneRect(QRectF(pixmap.rect()));
calcHist(pixmap, hist_2, maxLevel_2);
drawHist(pixmapItem_4, hist_2, maxLevel_2);
}
void MainWindow::on_actionGamma_correction_triggered()
{
QPixmap pixmap = pixmapItem->pixmap().copy();
QImage image = pixmap.toImage();
int width = image.width();
int height = image.height();
if (width == 0 || height == 0)
{
ui->statusBar->showMessage( tr("Error. Image bad size"), 3000 );
return;
}
DialogGammaCorrection dialog;
if (dialog.exec() == QDialog::Rejected)
return;
int maxR = -1;
int maxG = -1;
int maxB = -1;
for (int y = 0; y < height; ++y)
for (int x = 0; x < width; ++x)
{
QRgb oldColor = image.pixel(x, y);
int red = qRed(oldColor);
int green = qGreen(oldColor);
int blue = qBlue(oldColor);
if (red > maxR)
maxR = red;
if (green > maxG)
maxG = green;
if (blue > maxB)
maxB = blue;
}
double gamma = dialog.getGamma();
double cR = 255 / qPow(maxR, gamma);
double cG = 255 / qPow(maxG, gamma);
double cB = 255 / qPow(maxB, gamma);
for (int y = 0; y < height; ++y)
for (int x = 0; x < width; ++x)
{
QRgb oldColor = image.pixel(x, y);
int red = cR * qPow(qRed(oldColor), gamma);
int green = cG * qPow(qGreen(oldColor), gamma);
int blue = cB * qPow(qBlue(oldColor), gamma);
if (red < 0)
red = 0;
if (red > 255)
red = 255;
if (green < 0)
green = 0;
if (green > 255)
green = 255;
if (blue < 0)
blue = 0;
if (blue > 255)
blue = 255;
image.setPixel(x, y, qRgb(red, green, blue));
}
pixmap.convertFromImage(image);
pixmapItem_2->setPixmap(pixmap);
scene_2->setSceneRect(QRectF(pixmap.rect()));
calcHist(pixmap, hist_2, maxLevel_2);
drawHist(pixmapItem_4, hist_2, maxLevel_2);
}
void MainWindow::on_actionBrightness_normalization_triggered()
{
QPixmap pixmap = pixmapItem->pixmap().copy();
QImage image = pixmap.toImage();
int width = image.width();
int height = image.height();
if (width == 0 || height == 0)
{
ui->statusBar->showMessage( tr("Error. Image bad size"), 3000 );
return;
}
int minV = 256;
int maxV = -1;
for (int y = 0; y < height; ++y)
for (int x = 0; x < width; ++x)
{
QColor oldColor(image.pixel(x, y));
int v = oldColor.value();
if (v < minV)
minV = v;
if (v > maxV)
maxV = v;
}
for (int y = 0; y < height; ++y)
for (int x = 0; x < width; ++x)
{
QColor oldColor(image.pixel(x, y));
int v = ( oldColor.value() - minV) * 255 / (maxV - minV);
if (v < 0)
v = 0;
if (v > 255)
v = 255;
QColor newColor;
newColor.setHsv(oldColor.hue(), oldColor.saturation(), v);
image.setPixel(x, y, newColor.rgb());
}
pixmap.convertFromImage(image);
pixmapItem_2->setPixmap(pixmap);
scene_2->setSceneRect(QRectF(pixmap.rect()));
calcHist(pixmap, hist_2, maxLevel_2);
drawHist(pixmapItem_4, hist_2, maxLevel_2);
}
void RGB_equalization(QImage &image)
{
int width = image.width();
int height = image.height();
int histSize = 256;
std::vector<double> histR(histSize, 0.0);
std::vector<double> histG(histSize, 0.0);
std::vector<double> histB(histSize, 0.0);
for (int y = 0; y < height; ++y)
for (int x = 0; x < width; ++x)
{
QRgb oldColor = image.pixel(x, y);
int red = qRed(oldColor);
int green = qGreen(oldColor);
int blue = qBlue(oldColor);
++histR[red];
++histG[green];
++histB[blue];
}
for (int i = 1; i < histSize; ++i)
{