QT+QT creator+OpenCV图像灰度化

QT+QT creator+OpenCV图像灰度化

1）.pro文件

#-------------------------------------------------## Project created by QtCreator 2014-05-18T12:56:52##-------------------------------------------------QT += core guigreaterThan(QT_MAJOR_VERSION, 4): QT += widgetsTARGET = myQTDemoTEMPLATE = appSOURCES += main.cpp\ mainwindow.cppHEADERS += mainwindow.hFORMS += mainwindow.uiINCLUDEPATH+=d:\opencv249\include\opencv\ d:\opencv249\include\opencv2\ d:\opencv249\includeLIBS+=d:\opencv249\lib\libopencv_calib3d249.dll.a\ d:\opencv249\lib\libopencv_contrib249.dll.a\ d:\opencv249\lib\libopencv_core249.dll.a\ d:\opencv249\lib\libopencv_features2d249.dll.a\ d:\opencv249\lib\libopencv_flann249.dll.a\ d:\opencv249\lib\libopencv_gpu249.dll.a\ d:\opencv249\lib\libopencv_highgui249.dll.a\ d:\opencv249\lib\libopencv_imgproc249.dll.a\ d:\opencv249\lib\libopencv_legacy249.dll.a\ d:\opencv249\lib\libopencv_ml249.dll.a\ d:\opencv249\lib\libopencv_objdetect249.dll.a\ d:\opencv249\lib\libopencv_video249.dll.a

2）.h文件

#ifndef MAINWINDOW_H#define MAINWINDOW_H#include #include #include namespace Ui {class MainWindow;}class MainWindow : public QMainWindow{ Q_OBJECTpublic: explicit MainWindow(QWidget *parent = 0); ~MainWindow(); cv::Mat image,image2; QImage img;private slots: void on_pushButton_clicked(); void on_pushButton_2_clicked();private: Ui::MainWindow *ui;};#endif // MAINWINDOW_H

3）.cpp文件

#include "mainwindow.h"#include "ui_mainwindow.h"#include "mainwindow.h"#include "ui_mainwindow.h"#include #include #include #include #include using namespace cv;MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow){ ui->setupUi(this);}MainWindow::~MainWindow(){ delete ui;}void MainWindow::on_pushButton_clicked(){ QString filename = QFileDialog::getOpenFileName(this,tr("Open Image"),"",tr("Image File(*.bmp *.jpg *.jpeg *.png)")); QTextCodec *code = QTextCodec::codecForName("gb18030"); std::string name = code->fromUnicode(filename).data(); image = cv::imread(name); if(!image.data) { QMessageBox msgBox; msgBox.setText(tr("image data is null")); msgBox.exec(); } else { cv::cvtColor(image,image2,CV_BGR2RGB); img = QImage((const unsigned char*)(image2.data),image.cols,image.rows, image.step, QImage::Format_RGB888); ui->label->clear(); ui->label->setPixmap(QPixmap::fromImage(img)); //ui->processPushButton->setEnabled(true); ui->label->resize(ui->label->pixmap()->size()); }}void MainWindow::on_pushButton_2_clicked(){ // cv::flip(image,image,1); Mat gray; cvtColor(image,gray,CV_BGR2GRAY); // cvtColor(gray,gray,CV_bg) // imshow("li",gray); // cv::cvtColor(image,image,CV_BGR2RGB); // img = QImage((const unsigned char*)(image.data),image.cols,image.rows,image.cols*image.channels(), QImage::Format_RGB888); img = QImage((const unsigned char*)(gray.data),gray.cols,gray.rows,gray.step, QImage::Format_Indexed8); ui->label->setPixmap(QPixmap::fromImage(img));}

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