Qt label image display always has different size from original image

[Ludicrous Gray]

I have a problem with the image size displayed on label. It seems there are a fixed maximum size for the image's height even when the displayed image should be larger (check image below). This resulted the image getting cut which I don't want. I already tried to change the size of the Qpixmap ratio but the one that change is the size of the image but not the frame of the image. Here is the code that I use to display the image

from PyQt5 import QtWidgets,QtGui,QtCore
from mainwindow import Ui_MainWindow
import numpy as np 
import sys
import cv2
import matplotlib.pyplot as plt

    class ApplicationWindow(QtWidgets.QMainWindow):
        def __init__(self):
            super(ApplicationWindow, self).__init__()

            self.ui = Ui_MainWindow()
            self.ui.setupUi(self)
            self.ui.extractLightbtn.clicked.connect(lambda:self.extractLight(self.ui.browseLine.text()))

        def extractLight(self,filePath):
            #function to do extraction using model
            if filePath != "":
               self.oriImage = QtGui.QPixmap(filePath)
               self.oriResImage = self.oriImage.scaled(256, 256, QtCore.Qt.KeepAspectRatio)
               self.ui.oriDisplay.setPixmap(self.oriResImage)

As you can see on screenshot above. The right image got cut on neck to below and What I want is to display it to the same size as the image on the left. The original image size is 178x218 and since I allocate 256x256 space it should be enough for it. I do suspect the problem is on the designer part. Maybe someone can give me guidance on how to build it, I would be grateful

[VRonin]

Try setting the scaledContents property of QLabel to true