QT Creator+OpenCV实现图像灰度化的示例代码

Qt Creator是跨平台的 Qt IDE, Qt Creator 是 Qt 被 Nokia 收购后推出的一款新的轻量级集成开发环境(IDE)。此 IDE 能够跨平台运行,支持的系统包括 Linux(32 位及 64 位)、Mac OS X 以及 Windows。根据官方描述,Qt Creator 的设计目标是使开发人员能够利用 Qt 这个应用程序框架更加快速及轻易的完成开发任务。

下面是QT+QT creator+OpenCV图像灰度化源码

1).pro文件

#-------------------------------------------------
#
#
#-------------------------------------------------
 
QT += core gui
 
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
 
TARGET = myQTDemo
TEMPLATE = app
 
 
SOURCES += main.cpp\
 mainwindow.cpp
 
HEADERS += mainwindow.h
 
FORMS += mainwindow.ui
INCLUDEPATH+=d:\opencv249\include\opencv\
 d:\opencv249\include\opencv2\
 d:\opencv249\include
 
LIBS+=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 <QMainWindow>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
namespace Ui {
class MainWindow;
}
 
class MainWindow : public QMainWindow
{
 Q_OBJECT
 
public:
 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 <QString>
#include <QFileDialog>
#include <QMessageBox>
#include <opencv/cv.h>
#include <QTextCodec>
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));
}
作者:音视频开发老舅原文地址:https://blog.csdn.net/m0_60259116/article/details/128122096

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