十 基于opencv实现图像的均值滤波和边缘检测

1.加载图片

void MainWindow::on_btn_load_clicked() {
    QString imagePath = QFileDialog::getOpenFileName(this,
                                                     "打开图像",
                                                     "ddd/",
                                                     "(所有图像(*.jpg *.png *.bmp *.jpeg))");
    if (imagePath.isEmpty()) {
        return;
    }

    // Mat
    srcImage = imread(imagePath.toStdString());
    cvtColor(srcImage, srcImage, CV_BGR2RGB);
    QImage displayImg = QImage(srcImage.data,
                               srcImage.cols,
                               srcImage.rows,
                               srcImage.cols * srcImage.channels(),
                               QImage::Format_RGB888);
    QImage displayImage = imageCenter(displayImg, ui->lb_show);
    ui->lb_show->setPixmap(QPixmap::fromImage(displayImage));
}

2.图像居中显示

// 图片居中显示，图片大小与label大小相适配
QImage Mai