Python 2.7 如何在Qt设计器窗体上加载图像

我正在尝试在Qt Designer窗体上加载图像。我编写的代码在加载后在新窗口中显示精细图像，但当我试图在Qt Designer中设计的窗体上显示相同的图像时，它不会在该窗体上显示图像，也不会给出任何错误。下面是Qt表单及其调用的主类的代码

主文件：

#!/usr/bin/python
""" imageProc is an application to do several simple operations in image processing"""

from PyQt4 import QtGui
import sys
#from gui1 import *
import sip
from form import *
from form1 import *
from process import *


class MyForm(QtGui.QMainWindow):
 def __init__(self,parent=None):
    super(MyForm, self).__init__()
    QtGui.QWidget.__init__(self,parent)
    self.u=U_Form()
    self.u.setupUi(self)
    self.imgProc = imagePreProcessor()
    self.label = QtGui.QLabel(self)
    QtCore.QObject.connect(self.u.pushButton, QtCore.SIGNAL('clicked()'), self.load)
 def load(self):
    filepath = QtGui.QFileDialog.getOpenFileName(
        self, 'Open File', '', 'All Files (*.*);;jpeg (*.jpeg);;jpg (*.jpg);;png (*.png);;ppm (*.ppm)')
    filename=filepath.toLocal8Bit().data()
    if filepath:
        self.open(filepath)

 def open(self, filepath):
    self.form1= Ui_DiabeticRetinopathy1()
    self.form1.setupUi(self)
    self.form1.imgPreProc.loadImage(str(filepath))
    self.form1.prnt()


if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    form=MyForm()
    form.show()
    app.exec_()

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'form1.ui'
#
# Created: Sat Aug 23 03:10:41 2014
#      by: PyQt4 UI code generator 4.11.1
#
# WARNING! All changes made in this file will be lost!

from PyQt4 import QtCore, QtGui
from PyQt4.QtGui import *
from PyQt4.QtCore import *
import Image, ImageQt
from process import imagePreProcessor
import sip

try:
    _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
    def _fromUtf8(s):
        return s

try:
    _encoding = QtGui.QApplication.UnicodeUTF8
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig)

class Ui_DiabeticRetinopathy1(QtGui.QMainWindow):
    def __init__(self):
        super(Ui_DiabeticRetinopathy1, self).__init__()
        self.imgPreProc = imagePreProcessor()
        #self.rightbottom = QtGui.QWidget(mainWidget)
        #self.label = QtGui.QLabel(self)
        #self.setupUi(self)
    def setupUi(self, DiabeticRetinopathy):
        #mainWidget = QtGui.QWidget()
        #hbox = QtGui.QVBoxLayout(mainWidget)
        #self.grid = QtGui.QGridLayout()
        #self.rightbottom = QtGui.QWidget(mainWidget)
        #self.label.setLayout(grid)
        DiabeticRetinopathy.setObjectName(_fromUtf8("DiabeticRetinopathy"))
        DiabeticRetinopathy.resize(640, 480)
        icon = QtGui.QIcon()
        icon.addPixmap(QtGui.QPixmap(_fromUtf8("../im0003.jpg")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
        DiabeticRetinopathy.setWindowIcon(icon)
        DiabeticRetinopathy.setStyleSheet(_fromUtf8("background-color: rgb(0, 86, 86);"))
        self.centralwidget = QtGui.QWidget(DiabeticRetinopathy)
        self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
        self.verticalLayoutWidget = QtGui.QWidget(self.centralwidget)
        self.verticalLayoutWidget.setGeometry(QtCore.QRect(850, 80, 181, 131))
        self.verticalLayoutWidget.setObjectName(_fromUtf8("verticalLayoutWidget"))
        self.verticalLayout = QtGui.QVBoxLayout(self.verticalLayoutWidget)
        self.verticalLayout.setMargin(0)
        self.verticalLayout.setObjectName(_fromUtf8("verticalLayout"))
        self.pushButton = QtGui.QPushButton(self.verticalLayoutWidget)
        self.pushButton.setStyleSheet(_fromUtf8("background-color: rgb(191, 191, 191);\n"
"font: 75 8pt \"Verdana\";"))
        self.pushButton.setObjectName(_fromUtf8("pushButton"))
        self.verticalLayout.addWidget(self.pushButton)
        self.pushButton_2 = QtGui.QPushButton(self.verticalLayoutWidget)
        self.pushButton_2.setStyleSheet(_fromUtf8("background-color: rgb(191, 191, 191);\n"
"font: 75 8pt \"Verdana\";"))
        self.pushButton_2.setObjectName(_fromUtf8("pushButton_2"))
        self.verticalLayout.addWidget(self.pushButton_2)
        self.pushButton_3 = QtGui.QPushButton(self.verticalLayoutWidget)
        self.pushButton_3.setStyleSheet(_fromUtf8("background-color: rgb(191, 191, 191);\n"
"font: 75 8pt \"Verdana\";"))
        self.pushButton_3.setObjectName(_fromUtf8("pushButton_3"))
        self.verticalLayout.addWidget(self.pushButton_3)
        self.pushButton_4 = QtGui.QPushButton(self.verticalLayoutWidget)
        self.pushButton_4.setStyleSheet(_fromUtf8("background-color: rgb(191, 191, 191);\n"
"font: 75 8pt \"Verdana\";"))
        self.pushButton_4.setObjectName(_fromUtf8("pushButton_4"))
        self.verticalLayout.addWidget(self.pushButton_4)
        self.verticalLayoutWidget_2 = QtGui.QWidget(self.centralwidget)
        self.verticalLayoutWidget_2.setGeometry(QtCore.QRect(850, 250, 182, 141))
        self.verticalLayoutWidget_2.setObjectName(_fromUtf8("verticalLayoutWidget_2"))
        self.verticalLayout_2 = QtGui.QVBoxLayout(self.verticalLayoutWidget_2)
        self.verticalLayout_2.setMargin(0)
        self.verticalLayout_2.setObjectName(_fromUtf8("verticalLayout_2"))
        self.pushButton_5 = QtGui.QPushButton(self.verticalLayoutWidget_2)
        self.pushButton_5.setStyleSheet(_fromUtf8("background-color: rgb(191, 191, 191);\n"
"font: 75 8pt \"Verdana\";"))
        self.pushButton_5.setObjectName(_fromUtf8("pushButton_5"))
        self.verticalLayout_2.addWidget(self.pushButton_5)
        self.pushButton_6 = QtGui.QPushButton(self.verticalLayoutWidget_2)
        self.pushButton_6.setStyleSheet(_fromUtf8("background-color: rgb(191, 191, 191);\n"
"font: 75 8pt \"Verdana\";"))
        self.pushButton_6.setObjectName(_fromUtf8("pushButton_6"))
        self.verticalLayout_2.addWidget(self.pushButton_6)
        self.pushButton_7 = QtGui.QPushButton(self.verticalLayoutWidget_2)
        self.pushButton_7.setStyleSheet(_fromUtf8("background-color: rgb(191, 191, 191);\n"
"font: 75 8pt \"Verdana\";"))
        self.pushButton_7.setObjectName(_fromUtf8("pushButton_7"))
        self.verticalLayout_2.addWidget(self.pushButton_7)
        self.pushButton_8 = QtGui.QPushButton(self.verticalLayoutWidget_2)
        self.pushButton_8.setStyleSheet(_fromUtf8("background-color: rgb(191, 191, 191);\n"
"font: 75 8pt \"Verdana\";"))
        self.pushButton_8.setObjectName(_fromUtf8("pushButton_8"))
        self.verticalLayout_2.addWidget(self.pushButton_8)
        DiabeticRetinopathy.setCentralWidget(self.centralwidget)
        self.statusbar = QtGui.QStatusBar(DiabeticRetinopathy)
        self.statusbar.setObjectName(_fromUtf8("statusbar"))
        DiabeticRetinopathy.setStatusBar(self.statusbar)

        self.retranslateUi(DiabeticRetinopathy)
        QtCore.QMetaObject.connectSlotsByName(DiabeticRetinopathy)

    def retranslateUi(self, DiabeticRetinopathy):
        DiabeticRetinopathy.setWindowTitle(_translate("DiabeticRetinopathy", "Diabetic Retinopathy Detection", None))
        self.pushButton.setText(_translate("DiabeticRetinopathy", "Grayscale", None))
        self.pushButton_2.setText(_translate("DiabeticRetinopathy", "Zero Padding", None))
        self.pushButton_3.setText(_translate("DiabeticRetinopathy", "Normalize", None))
        self.pushButton_4.setText(_translate("DiabeticRetinopathy", "Smoothing", None))
        self.pushButton_5.setText(_translate("DiabeticRetinopathy", "Detection of Micro-Aneurysms", None))
        self.pushButton_6.setText(_translate("DiabeticRetinopathy", "Detection of Hemorrhages", None))
        self.pushButton_7.setText(_translate("DiabeticRetinopathy", "Detection of Exudates", None))
        self.pushButton_8.setText(_translate("DiabeticRetinopathy", "Grading", None))
    def prnt(self):
       self.label = QtGui.QLabel(self)
       self.label.setPixmap(self.imgPreProc.pixmap)
       x, y, w, h = 10, 10, 700, 605
       self.label.setGeometry(x, y, w, h)
       self.label.resize(w, h)

class imagePreProcessor():
    def __init__(self):
        self.Qimg = None
        self.img = None
        self.image=QImage()

    def loadImage(self, imgFile):
      self.img = cv2.imread(imgFile)
      #cv2.imshow('image',self.img)
      #def toQimage(self):
      if self.img != None:
        self.pixmap = QtGui.QPixmap(imgFile)

表单文件：

#!/usr/bin/python
""" imageProc is an application to do several simple operations in image processing"""

from PyQt4 import QtGui
import sys
#from gui1 import *
import sip
from form import *
from form1 import *
from process import *


class MyForm(QtGui.QMainWindow):
 def __init__(self,parent=None):
    super(MyForm, self).__init__()
    QtGui.QWidget.__init__(self,parent)
    self.u=U_Form()
    self.u.setupUi(self)
    self.imgProc = imagePreProcessor()
    self.label = QtGui.QLabel(self)
    QtCore.QObject.connect(self.u.pushButton, QtCore.SIGNAL('clicked()'), self.load)
 def load(self):
    filepath = QtGui.QFileDialog.getOpenFileName(
        self, 'Open File', '', 'All Files (*.*);;jpeg (*.jpeg);;jpg (*.jpg);;png (*.png);;ppm (*.ppm)')
    filename=filepath.toLocal8Bit().data()
    if filepath:
        self.open(filepath)

 def open(self, filepath):
    self.form1= Ui_DiabeticRetinopathy1()
    self.form1.setupUi(self)
    self.form1.imgPreProc.loadImage(str(filepath))
    self.form1.prnt()


if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    form=MyForm()
    form.show()
    app.exec_()

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'form1.ui'
#
# Created: Sat Aug 23 03:10:41 2014
#      by: PyQt4 UI code generator 4.11.1
#
# WARNING! All changes made in this file will be lost!

from PyQt4 import QtCore, QtGui
from PyQt4.QtGui import *
from PyQt4.QtCore import *
import Image, ImageQt
from process import imagePreProcessor
import sip

try:
    _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
    def _fromUtf8(s):
        return s

try:
    _encoding = QtGui.QApplication.UnicodeUTF8
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig)

class Ui_DiabeticRetinopathy1(QtGui.QMainWindow):
    def __init__(self):
        super(Ui_DiabeticRetinopathy1, self).__init__()
        self.imgPreProc = imagePreProcessor()
        #self.rightbottom = QtGui.QWidget(mainWidget)
        #self.label = QtGui.QLabel(self)
        #self.setupUi(self)
    def setupUi(self, DiabeticRetinopathy):
        #mainWidget = QtGui.QWidget()
        #hbox = QtGui.QVBoxLayout(mainWidget)
        #self.grid = QtGui.QGridLayout()
        #self.rightbottom = QtGui.QWidget(mainWidget)
        #self.label.setLayout(grid)
        DiabeticRetinopathy.setObjectName(_fromUtf8("DiabeticRetinopathy"))
        DiabeticRetinopathy.resize(640, 480)
        icon = QtGui.QIcon()
        icon.addPixmap(QtGui.QPixmap(_fromUtf8("../im0003.jpg")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
        DiabeticRetinopathy.setWindowIcon(icon)
        DiabeticRetinopathy.setStyleSheet(_fromUtf8("background-color: rgb(0, 86, 86);"))
        self.centralwidget = QtGui.QWidget(DiabeticRetinopathy)
        self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
        self.verticalLayoutWidget = QtGui.QWidget(self.centralwidget)
        self.verticalLayoutWidget.setGeometry(QtCore.QRect(850, 80, 181, 131))
        self.verticalLayoutWidget.setObjectName(_fromUtf8("verticalLayoutWidget"))
        self.verticalLayout = QtGui.QVBoxLayout(self.verticalLayoutWidget)
        self.verticalLayout.setMargin(0)
        self.verticalLayout.setObjectName(_fromUtf8("verticalLayout"))
        self.pushButton = QtGui.QPushButton(self.verticalLayoutWidget)
        self.pushButton.setStyleSheet(_fromUtf8("background-color: rgb(191, 191, 191);\n"
"font: 75 8pt \"Verdana\";"))
        self.pushButton.setObjectName(_fromUtf8("pushButton"))
        self.verticalLayout.addWidget(self.pushButton)
        self.pushButton_2 = QtGui.QPushButton(self.verticalLayoutWidget)
        self.pushButton_2.setStyleSheet(_fromUtf8("background-color: rgb(191, 191, 191);\n"
"font: 75 8pt \"Verdana\";"))
        self.pushButton_2.setObjectName(_fromUtf8("pushButton_2"))
        self.verticalLayout.addWidget(self.pushButton_2)
        self.pushButton_3 = QtGui.QPushButton(self.verticalLayoutWidget)
        self.pushButton_3.setStyleSheet(_fromUtf8("background-color: rgb(191, 191, 191);\n"
"font: 75 8pt \"Verdana\";"))
        self.pushButton_3.setObjectName(_fromUtf8("pushButton_3"))
        self.verticalLayout.addWidget(self.pushButton_3)
        self.pushButton_4 = QtGui.QPushButton(self.verticalLayoutWidget)
        self.pushButton_4.setStyleSheet(_fromUtf8("background-color: rgb(191, 191, 191);\n"
"font: 75 8pt \"Verdana\";"))
        self.pushButton_4.setObjectName(_fromUtf8("pushButton_4"))
        self.verticalLayout.addWidget(self.pushButton_4)
        self.verticalLayoutWidget_2 = QtGui.QWidget(self.centralwidget)
        self.verticalLayoutWidget_2.setGeometry(QtCore.QRect(850, 250, 182, 141))
        self.verticalLayoutWidget_2.setObjectName(_fromUtf8("verticalLayoutWidget_2"))
        self.verticalLayout_2 = QtGui.QVBoxLayout(self.verticalLayoutWidget_2)
        self.verticalLayout_2.setMargin(0)
        self.verticalLayout_2.setObjectName(_fromUtf8("verticalLayout_2"))
        self.pushButton_5 = QtGui.QPushButton(self.verticalLayoutWidget_2)
        self.pushButton_5.setStyleSheet(_fromUtf8("background-color: rgb(191, 191, 191);\n"
"font: 75 8pt \"Verdana\";"))
        self.pushButton_5.setObjectName(_fromUtf8("pushButton_5"))
        self.verticalLayout_2.addWidget(self.pushButton_5)
        self.pushButton_6 = QtGui.QPushButton(self.verticalLayoutWidget_2)
        self.pushButton_6.setStyleSheet(_fromUtf8("background-color: rgb(191, 191, 191);\n"
"font: 75 8pt \"Verdana\";"))
        self.pushButton_6.setObjectName(_fromUtf8("pushButton_6"))
        self.verticalLayout_2.addWidget(self.pushButton_6)
        self.pushButton_7 = QtGui.QPushButton(self.verticalLayoutWidget_2)
        self.pushButton_7.setStyleSheet(_fromUtf8("background-color: rgb(191, 191, 191);\n"
"font: 75 8pt \"Verdana\";"))
        self.pushButton_7.setObjectName(_fromUtf8("pushButton_7"))
        self.verticalLayout_2.addWidget(self.pushButton_7)
        self.pushButton_8 = QtGui.QPushButton(self.verticalLayoutWidget_2)
        self.pushButton_8.setStyleSheet(_fromUtf8("background-color: rgb(191, 191, 191);\n"
"font: 75 8pt \"Verdana\";"))
        self.pushButton_8.setObjectName(_fromUtf8("pushButton_8"))
        self.verticalLayout_2.addWidget(self.pushButton_8)
        DiabeticRetinopathy.setCentralWidget(self.centralwidget)
        self.statusbar = QtGui.QStatusBar(DiabeticRetinopathy)
        self.statusbar.setObjectName(_fromUtf8("statusbar"))
        DiabeticRetinopathy.setStatusBar(self.statusbar)

        self.retranslateUi(DiabeticRetinopathy)
        QtCore.QMetaObject.connectSlotsByName(DiabeticRetinopathy)

    def retranslateUi(self, DiabeticRetinopathy):
        DiabeticRetinopathy.setWindowTitle(_translate("DiabeticRetinopathy", "Diabetic Retinopathy Detection", None))
        self.pushButton.setText(_translate("DiabeticRetinopathy", "Grayscale", None))
        self.pushButton_2.setText(_translate("DiabeticRetinopathy", "Zero Padding", None))
        self.pushButton_3.setText(_translate("DiabeticRetinopathy", "Normalize", None))
        self.pushButton_4.setText(_translate("DiabeticRetinopathy", "Smoothing", None))
        self.pushButton_5.setText(_translate("DiabeticRetinopathy", "Detection of Micro-Aneurysms", None))
        self.pushButton_6.setText(_translate("DiabeticRetinopathy", "Detection of Hemorrhages", None))
        self.pushButton_7.setText(_translate("DiabeticRetinopathy", "Detection of Exudates", None))
        self.pushButton_8.setText(_translate("DiabeticRetinopathy", "Grading", None))
    def prnt(self):
       self.label = QtGui.QLabel(self)
       self.label.setPixmap(self.imgPreProc.pixmap)
       x, y, w, h = 10, 10, 700, 605
       self.label.setGeometry(x, y, w, h)
       self.label.resize(w, h)

class imagePreProcessor():
    def __init__(self):
        self.Qimg = None
        self.img = None
        self.image=QImage()

    def loadImage(self, imgFile):
      self.img = cv2.imread(imgFile)
      #cv2.imshow('image',self.img)
      #def toQimage(self):
      if self.img != None:
        self.pixmap = QtGui.QPixmap(imgFile)

加载图像：

#!/usr/bin/python
""" imageProc is an application to do several simple operations in image processing"""

from PyQt4 import QtGui
import sys
#from gui1 import *
import sip
from form import *
from form1 import *
from process import *


class MyForm(QtGui.QMainWindow):
 def __init__(self,parent=None):
    super(MyForm, self).__init__()
    QtGui.QWidget.__init__(self,parent)
    self.u=U_Form()
    self.u.setupUi(self)
    self.imgProc = imagePreProcessor()
    self.label = QtGui.QLabel(self)
    QtCore.QObject.connect(self.u.pushButton, QtCore.SIGNAL('clicked()'), self.load)
 def load(self):
    filepath = QtGui.QFileDialog.getOpenFileName(
        self, 'Open File', '', 'All Files (*.*);;jpeg (*.jpeg);;jpg (*.jpg);;png (*.png);;ppm (*.ppm)')
    filename=filepath.toLocal8Bit().data()
    if filepath:
        self.open(filepath)

 def open(self, filepath):
    self.form1= Ui_DiabeticRetinopathy1()
    self.form1.setupUi(self)
    self.form1.imgPreProc.loadImage(str(filepath))
    self.form1.prnt()


if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    form=MyForm()
    form.show()
    app.exec_()

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'form1.ui'
#
# Created: Sat Aug 23 03:10:41 2014
#      by: PyQt4 UI code generator 4.11.1
#
# WARNING! All changes made in this file will be lost!

from PyQt4 import QtCore, QtGui
from PyQt4.QtGui import *
from PyQt4.QtCore import *
import Image, ImageQt
from process import imagePreProcessor
import sip

try:
    _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
    def _fromUtf8(s):
        return s

try:
    _encoding = QtGui.QApplication.UnicodeUTF8
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
    def _translate(context, text, disambig):
        return QtGui.QApplication.translate(context, text, disambig)

class Ui_DiabeticRetinopathy1(QtGui.QMainWindow):
    def __init__(self):
        super(Ui_DiabeticRetinopathy1, self).__init__()
        self.imgPreProc = imagePreProcessor()
        #self.rightbottom = QtGui.QWidget(mainWidget)
        #self.label = QtGui.QLabel(self)
        #self.setupUi(self)
    def setupUi(self, DiabeticRetinopathy):
        #mainWidget = QtGui.QWidget()
        #hbox = QtGui.QVBoxLayout(mainWidget)
        #self.grid = QtGui.QGridLayout()
        #self.rightbottom = QtGui.QWidget(mainWidget)
        #self.label.setLayout(grid)
        DiabeticRetinopathy.setObjectName(_fromUtf8("DiabeticRetinopathy"))
        DiabeticRetinopathy.resize(640, 480)
        icon = QtGui.QIcon()
        icon.addPixmap(QtGui.QPixmap(_fromUtf8("../im0003.jpg")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
        DiabeticRetinopathy.setWindowIcon(icon)
        DiabeticRetinopathy.setStyleSheet(_fromUtf8("background-color: rgb(0, 86, 86);"))
        self.centralwidget = QtGui.QWidget(DiabeticRetinopathy)
        self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
        self.verticalLayoutWidget = QtGui.QWidget(self.centralwidget)
        self.verticalLayoutWidget.setGeometry(QtCore.QRect(850, 80, 181, 131))
        self.verticalLayoutWidget.setObjectName(_fromUtf8("verticalLayoutWidget"))
        self.verticalLayout = QtGui.QVBoxLayout(self.verticalLayoutWidget)
        self.verticalLayout.setMargin(0)
        self.verticalLayout.setObjectName(_fromUtf8("verticalLayout"))
        self.pushButton = QtGui.QPushButton(self.verticalLayoutWidget)
        self.pushButton.setStyleSheet(_fromUtf8("background-color: rgb(191, 191, 191);\n"
"font: 75 8pt \"Verdana\";"))
        self.pushButton.setObjectName(_fromUtf8("pushButton"))
        self.verticalLayout.addWidget(self.pushButton)
        self.pushButton_2 = QtGui.QPushButton(self.verticalLayoutWidget)
        self.pushButton_2.setStyleSheet(_fromUtf8("background-color: rgb(191, 191, 191);\n"
"font: 75 8pt \"Verdana\";"))
        self.pushButton_2.setObjectName(_fromUtf8("pushButton_2"))
        self.verticalLayout.addWidget(self.pushButton_2)
        self.pushButton_3 = QtGui.QPushButton(self.verticalLayoutWidget)
        self.pushButton_3.setStyleSheet(_fromUtf8("background-color: rgb(191, 191, 191);\n"
"font: 75 8pt \"Verdana\";"))
        self.pushButton_3.setObjectName(_fromUtf8("pushButton_3"))
        self.verticalLayout.addWidget(self.pushButton_3)
        self.pushButton_4 = QtGui.QPushButton(self.verticalLayoutWidget)
        self.pushButton_4.setStyleSheet(_fromUtf8("background-color: rgb(191, 191, 191);\n"
"font: 75 8pt \"Verdana\";"))
        self.pushButton_4.setObjectName(_fromUtf8("pushButton_4"))
        self.verticalLayout.addWidget(self.pushButton_4)
        self.verticalLayoutWidget_2 = QtGui.QWidget(self.centralwidget)
        self.verticalLayoutWidget_2.setGeometry(QtCore.QRect(850, 250, 182, 141))
        self.verticalLayoutWidget_2.setObjectName(_fromUtf8("verticalLayoutWidget_2"))
        self.verticalLayout_2 = QtGui.QVBoxLayout(self.verticalLayoutWidget_2)
        self.verticalLayout_2.setMargin(0)
        self.verticalLayout_2.setObjectName(_fromUtf8("verticalLayout_2"))
        self.pushButton_5 = QtGui.QPushButton(self.verticalLayoutWidget_2)
        self.pushButton_5.setStyleSheet(_fromUtf8("background-color: rgb(191, 191, 191);\n"
"font: 75 8pt \"Verdana\";"))
        self.pushButton_5.setObjectName(_fromUtf8("pushButton_5"))
        self.verticalLayout_2.addWidget(self.pushButton_5)
        self.pushButton_6 = QtGui.QPushButton(self.verticalLayoutWidget_2)
        self.pushButton_6.setStyleSheet(_fromUtf8("background-color: rgb(191, 191, 191);\n"
"font: 75 8pt \"Verdana\";"))
        self.pushButton_6.setObjectName(_fromUtf8("pushButton_6"))
        self.verticalLayout_2.addWidget(self.pushButton_6)
        self.pushButton_7 = QtGui.QPushButton(self.verticalLayoutWidget_2)
        self.pushButton_7.setStyleSheet(_fromUtf8("background-color: rgb(191, 191, 191);\n"
"font: 75 8pt \"Verdana\";"))
        self.pushButton_7.setObjectName(_fromUtf8("pushButton_7"))
        self.verticalLayout_2.addWidget(self.pushButton_7)
        self.pushButton_8 = QtGui.QPushButton(self.verticalLayoutWidget_2)
        self.pushButton_8.setStyleSheet(_fromUtf8("background-color: rgb(191, 191, 191);\n"
"font: 75 8pt \"Verdana\";"))
        self.pushButton_8.setObjectName(_fromUtf8("pushButton_8"))
        self.verticalLayout_2.addWidget(self.pushButton_8)
        DiabeticRetinopathy.setCentralWidget(self.centralwidget)
        self.statusbar = QtGui.QStatusBar(DiabeticRetinopathy)
        self.statusbar.setObjectName(_fromUtf8("statusbar"))
        DiabeticRetinopathy.setStatusBar(self.statusbar)

        self.retranslateUi(DiabeticRetinopathy)
        QtCore.QMetaObject.connectSlotsByName(DiabeticRetinopathy)

    def retranslateUi(self, DiabeticRetinopathy):
        DiabeticRetinopathy.setWindowTitle(_translate("DiabeticRetinopathy", "Diabetic Retinopathy Detection", None))
        self.pushButton.setText(_translate("DiabeticRetinopathy", "Grayscale", None))
        self.pushButton_2.setText(_translate("DiabeticRetinopathy", "Zero Padding", None))
        self.pushButton_3.setText(_translate("DiabeticRetinopathy", "Normalize", None))
        self.pushButton_4.setText(_translate("DiabeticRetinopathy", "Smoothing", None))
        self.pushButton_5.setText(_translate("DiabeticRetinopathy", "Detection of Micro-Aneurysms", None))
        self.pushButton_6.setText(_translate("DiabeticRetinopathy", "Detection of Hemorrhages", None))
        self.pushButton_7.setText(_translate("DiabeticRetinopathy", "Detection of Exudates", None))
        self.pushButton_8.setText(_translate("DiabeticRetinopathy", "Grading", None))
    def prnt(self):
       self.label = QtGui.QLabel(self)
       self.label.setPixmap(self.imgPreProc.pixmap)
       x, y, w, h = 10, 10, 700, 605
       self.label.setGeometry(x, y, w, h)
       self.label.resize(w, h)

class imagePreProcessor():
    def __init__(self):
        self.Qimg = None
        self.img = None
        self.image=QImage()

    def loadImage(self, imgFile):
      self.img = cv2.imread(imgFile)
      #cv2.imshow('image',self.img)
      #def toQimage(self):
      if self.img != None:
        self.pixmap = QtGui.QPixmap(imgFile)

---

问题是您设置的

QLabel

image的父项是错误的。要修复它们，请设置trueparent

QWidget

def prnt(self):
    self.label = QtGui.QLabel(self.centralwidget)
    self.label.setPixmap(self.imgPreProc.pixmap)
    x, y, w, h = 10, 10, 700, 605
    self.label.setGeometry(x, y, w, h)
    self.label.resize(w, h)

---

…谢谢您的回复，但我正在开发一个应用程序，需要从计算机浏览图像。这似乎只适用于特定图像。我需要使图像路径动态化。你能告诉我怎么做吗？对不起，我弄错了你的问题。请看我上次编辑的答案。