Qt界面显示opencv图像（Qt5.8+opencv3.20+VS2015）

#include "widget.h" #include "ui_widget.h" #include <QString> #include <QFileDialog> #include <QMessageBox> #include <opencv2/opencv.hpp> #include <QTextCodec> Widget::Widget(QWidget *parent) : QWidget(parent), ui(new Ui::Widget) { ui->setupUi(this); } Widget::~Widget() { delete ui; } void Widget::on_pushButton_open_image_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,image,CV_BGR2RGB); img = QImage((const unsigned char*)(image.data),image.cols,image.rows,QImage::Format_RGB888); ui->label_show_image->clear(); ui->pushButton_image_processing->setEnabled(true); imgScaled = img.scaled(ui->label_show_image->size(),Qt::KeepAspectRatio); ui->label_show_image->setPixmap(QPixmap::fromImage(imgScaled)); ui->label_show_image->resize(ui->label_show_image->pixmap()->size()); } } void Widget::on_pushButton_image_processing_clicked() { cv::flip(image,image,1); img = QImage((const unsigned char*)(image.data),image.cols,image.rows,QImage::Format_RGB888); imgScaled = img.scaled(ui->label_show_image->size(),Qt::KeepAspectRatio); ui->label_show_image->setPixmap(QPixmap::fromImage(imgScaled)); }