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#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!");
}
}
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