2021-09-28vs+opencv+QT简单的图像处理工程_opencv 用qt还是vs_二两山栀子的博客-CSDN博客
【vs+opencv+Qt搭建简单的图像处理界面】https://www.bilibili.com/video/BV16T411j7XQ?vd_source=0aeb782d0b9c2e6b0e0cdea3e2121eba
调试过程一直出现这种问题，后来改DEBUG为release就可以了
mainwindow.hpp
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QLabel>
#include <QMainWindow>
#include <QFileDialog>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/opencv.hpp>
#include <opencv2/imgproc/imgproc.hpp>
using namespace cv;namespace Ui {class MainWindow;class mainwindowClass;
}class MainWindow : public QMainWindow
{Q_OBJECTpublic:explicit MainWindow(QWidget* parent = 0);~MainWindow();private slots:void on_pushButton_clicked();void on_pushButton_2_clicked();void on_pushButton_3_clicked();void on_pushButton_4_clicked();
private:QImage MatToQImage(const cv::Mat& mat); // MAT类型 转 QImage类型void display_MatInQT(QLabel* label, cv::Mat mat); // MAT对象 QT显示private:Ui::mainwindowClass* ui;Mat image;Mat mat_Gaussian;Mat gray;
};#endif // MAINWINDOW_H#pragma once
mainwindow.cpp
#include "mainwindow.hpp"
#include "ui_mainwindow.h"
#include <QMessageBox>
MainWindow::MainWindow(QWidget* parent) :QMainWindow(parent),ui(new Ui::mainwindowClass)
{ui->setupUi(this);ui->pushButton_2->setEnabled(false);ui->pushButton_3->setEnabled(false);ui->pushButton_4->setEnabled(false);
}MainWindow::~MainWindow()
{delete ui;
}void MainWindow::on_pushButton_clicked()
{//调用窗口打开文件ui->label->clear();ui->label_1->clear();QString filename = QFileDialog::getOpenFileName(this,tr("open image"),".",tr("Image file(*.png *.jpg *.bmp)"));image = imread(filename.toLocal8Bit().data());if (image.data) {ui->pushButton_2->setEnabled(true);ui->pushButton_3->setEnabled(true);ui->pushButton_4->setEnabled(true);// 通过 lable 方式显示图片display_MatInQT(ui->label, image);}else{QMessageBox::information(this, tr("提示"), tr("未成功载入图片！"), QMessageBox::Ok);}
}
void MainWindow::on_pushButton_2_clicked()
{ui->label_1->clear();if (image.data){// 高斯模糊GaussianBlur(image, mat_Gaussian, Size(29, 29), 0, 0);display_MatInQT(ui->label_1, mat_Gaussian);}else{QMessageBox::information(this, tr("提示"), tr("未成功载入图片！"), QMessageBox::Ok);}}
void MainWindow::on_pushButton_3_clicked()
{ui->label_1->clear();if (image.data){// 灰度化cvtColor(image, gray, COLOR_BGR2GRAY);display_MatInQT(ui->label_1, gray);}else{QMessageBox::information(this, tr("提示"), tr("未成功载入图片！"), QMessageBox::Ok);}}
void MainWindow::on_pushButton_4_clicked()
{ui->label_1->clear();if (image.data){// 边缘检测Canny(image, gray, 150, 100, 3);display_MatInQT(ui->label_1, gray);}else{QMessageBox::information(this, tr("提示"), tr("未成功载入图片！"), QMessageBox::Ok);}}
QImage MainWindow::MatToQImage(const cv::Mat& mat)
{// 8-bits unsigned, NO. OF CHANNELS = 1if (mat.type() == CV_8UC1){QImage image(mat.cols, mat.rows, QImage::Format_Indexed8);// Set the color table (used to translate colour indexes to qRgb values)image.setColorCount(256);for (int i = 0; i < 256; i++){image.setColor(i, qRgb(i, i, i));}// Copy input Matuchar* pSrc = mat.data;for (int row = 0; row < mat.rows; row++){uchar* pDest = image.scanLine(row);memcpy(pDest, pSrc, mat.cols);pSrc += mat.step;}return image;}// 8-bits unsigned, NO. OF CHANNELS = 3else if (mat.type() == CV_8UC3){// Copy input Matconst uchar* pSrc = (const uchar*)mat.data;// Create QImage with same dimensions as input MatQImage image(pSrc, mat.cols, mat.rows, (int)mat.step, QImage::Format_RGB888);return image.rgbSwapped();}else if (mat.type() == CV_8UC4){//qDebug() << "CV_8UC4";// Copy input Matconst uchar* pSrc = (const uchar*)mat.data;// Create QImage with same dimensions as input MatQImage image(pSrc, mat.cols, mat.rows, (int)mat.step, QImage::Format_ARGB32);return image.copy();}else{//qDebug() << "ERROR: Mat could not be converted to QImage.";return QImage();}
}
//
void MainWindow::display_MatInQT(QLabel* label, Mat mat)
{label->setPixmap(QPixmap::fromImage(MatToQImage(mat)).scaled(label->size(), Qt::KeepAspectRatio, Qt::SmoothTransformation));}
