Qt OpenCV 在界面显示图片 通过Lable方式 和GraphicsView 方式

 1 void MainWindow::on_pushButton_clicked()
 2 {
 3   Mat srcImage,gray_image,srcImage1;
 4   QString Fileadd = QFileDialog::getOpenFileName(this,"get file");
 5   if(Fileadd.isEmpty())
 6   {
 7       QMessageBox::information(this,"警告","没有选择文件");
 8       return ;
 9   }
10   srcImage = imread(Fileadd.toLatin1().data());  //读取图片
11   cvtColor(srcImage,srcImage1,COLOR_BGR2RGB);         // 图像格式转换
12   QImage disImage = QImage((const unsigned char*)(srcImage1.data),srcImage1.cols,srcImage1.rows,QImage::Format_RGB888);
13   ui->label->setPixmap(QPixmap::fromImage(disImage.scaled(ui->label->size(), Qt::KeepAspectRatio)));
14 }

 1 void MainWindow::on_pushButton_2_clicked()
 2 {
 3     QString fileName = QFileDialog::getOpenFileName(this,tr("Open Image"),".",tr("Image File(*.png *.jpg *.jpeg *.bmp)"));
 4     if (fileName.isEmpty())
 5     {
 6         return;
 7     }
 8     Mat srcImage = imread(fileName.toLatin1().data());//读取图片数据
 9     cvtColor(srcImage, srcImage, COLOR_BGR2RGB);//图像格式转换
10     QImage disImage = QImage((const unsigned char*)(srcImage.data),srcImage.cols,srcImage.rows,QImage::Format_RGB888);
11  
12     QGraphicsScene *scene = new QGraphicsScene;//图像显示
13     scene->addPixmap(QPixmap::fromImage(disImage));
14     ui->graphicsView->setScene(scene);
15     ui->graphicsView->show();
16 }