You were trying to add an image in background of QGraphicsView
Try to add background image of QGraphicsView, or QGraphicsScene.

try:
Qt Code:
  1. ui->graphicsView->setBackgroundBrush(QBrush(*image));
  2. // set scene background transparent. ;)
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OR

Qt Code:
  1. ui->graphicsView->fitInView(scn->sceneRect(), Qt::KeepAspectRatio);
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ALL I CAN SE IS THE PROBLEM OF SCENE RECT.