PyQT5 中的全局变量

Question

I have two main scripts for my pyQT5 gui. First the GUI file ("MSCVgui_script") then the run file ("guiRun".py). I when I run my run file the GUI crashes when I modify the variable "self.imageFiles1" in the funciton assingPics.

What I do:

1. run "guiRun.py"
2. Select "Browse File"
3. select folder from the pop up
4. Close pop up
5. select the check mark blue on the GUI
6. Crash-> no error report The photo file paths are"C:\\Users.....\\Images\\photo_Blue.jpg" names are "photo_Blue"

runGui script below

from MSCVgui_script import Ui_MainWindow
from PyQt5 import QtCore, QtGui, QtWidgets
import sys
import glob
import cv2
import sys
from PyQt5.QtWidgets import QApplication, QWidget, QInputDialog, QLineEdit, QFileDialog
from PyQt5.QtGui import QIcon
import fileExplorer

class Main(QtWidgets.QMainWindow, Ui_MainWindow):




  def __init__(self):
    QtWidgets.QMainWindow.__init__(self)
    self.setupUi(self)
    self.setupInputs()
    #List of image types 
    self.image_Types=["photo_NIR", "photo_UV", "photo_Unfiltered", "photo_Polarized","photo_DarkRed","photo_LightRed","photo_Orange","photo_LightGreen","photo_Cyan","photo_Blue"]

    #first stack of images 
    self.imageFiles1 = {}
    #images to process 
    self.images_to_process=[]


  def setupInputs(self):
    self.File01.clicked.connect(self.openFolder)
    self.checkBox_BL.stateChanged.connect(self.imageChange)
    #self.checkBox_UV.clicked.connect(self.image1Change()
    #self.checkBox_NIR.clicked.toggle.onnect(self.image1Change(0))




  #open folder and import images into code
  def assingPics(self,folder):
    path = folder+"/*.jpg"
    image_files = glob.glob(path)
    for filepath in image_files:
      for i in self.image_Types:
        if(i in filepath):
          #self.imageFiles1[i] = filepath#HERE SEEMS TO BE THE PROBLEM 
          break
    print("done")


  #open the folder containing the images to build a stack from 
  def openFolder(self):
    folderOpener = fileExplorer.App()
    imgFiles = folderOpener.openFileNameDialog()
    folderOpener.closeTh()
    self.assingPics(imgFiles)
    return imgFiles

  #change image 1 according to check box
  def imageChange(self):
    print("CHANGE")
    if(self.checkBox_BL.isChecked()):
      print("start")
      imag = self.imageFiles1['photo_Blue']
      imag = cv2.imread(imag,0)
      imag = QtGui.QImage(imag.data, imag.shape[1], imag.shape[0], QtGui.QImage.Format_RGB888).rgbSwapped()
    if(self.checkBox_CY.isChecked()):
      print("dumb")

    if(self.checkBox_DR.isChecked()):
      print("dumb")


    if(self.checkBox_LG.isChecked()):
      print("dumb")


    if(self.checkBox_LP.isChecked()):
      print("dumb")

    if(self.checkBox_LR.isChecked()):
      print("dumb")

    if(self.checkBox_NIR.isChecked()):
      print("dumb")

    if(self.checkBox_OR.isChecked()):
      print("dumb")

    if(self.checkBox_UF.isChecked()):
      print("dumb")

    if(self.checkBox_UV.isChecked()):
      print("dumb")


if __name__ == "__main__":
    sys._excepthook = sys.excepthook 
    def exception_hook(exctype, value, traceback):
      print(exctype, value, traceback)
      sys._excepthook(exctype, value, traceback) 
      sys.exit(1) 
      sys.excepthook = exception_hook 
    # from multiprocessing import freeze_support
    # freeze_support()
    app = QtWidgets.QApplication(sys.argv)
    window = Main()
    # icon = QtGui.QIcon()
    # icon.addPixmap(QtGui.QPixmap("exe/xrt.ico"),QtGui.QIcon.Normal, QtGui.QIcon.Off)
    # window.setWindowIcon(icon)
    window.show()
    sys.exit(app.exec_())

MSCVgui_script below

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(1640, 900)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.File01 = QtWidgets.QPushButton(self.centralwidget)
        self.File01.setGeometry(QtCore.QRect(20, 5, 200, 40))
        self.File01.setObjectName("File01")
        self.Image01 = QtWidgets.QLabel(self.centralwidget)
        self.Image01.setGeometry(QtCore.QRect(30, 85, 1000, 300))
        self.Image01.setObjectName("Image01")
        self.checkBox_UV = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_UV.setGeometry(QtCore.QRect(100, 45, 87, 20))
        self.checkBox_UV.setObjectName("checkBox_UV")
        self.checkBox_NIR = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_NIR.setGeometry(QtCore.QRect(300, 45, 87, 20))
        self.checkBox_NIR.setObjectName("checkBox_NIR")
        self.checkBox_DR = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_DR.setGeometry(QtCore.QRect(500, 45, 87, 20))
        self.checkBox_DR.setObjectName("checkBox_DR")
        self.checkBox_LR = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_LR.setGeometry(QtCore.QRect(700, 45, 87, 20))
        self.checkBox_LR.setObjectName("checkBox_LR")
        self.checkBox_OR = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_OR.setGeometry(QtCore.QRect(900, 45, 87, 20))
        self.checkBox_OR.setObjectName("checkBox_OR")
        self.checkBox_LG = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_LG.setGeometry(QtCore.QRect(100, 405, 97, 20))
        self.checkBox_LG.setObjectName("checkBox_LG")
        self.checkBox_CY = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_CY.setGeometry(QtCore.QRect(300, 405, 87, 20))
        self.checkBox_CY.setObjectName("checkBox_CY")
        self.checkBox_BL = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_BL.setGeometry(QtCore.QRect(500, 405, 87, 20))
        self.checkBox_BL.setObjectName("checkBox_BL")
        self.checkBox_LP = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_LP.setGeometry(QtCore.QRect(700, 405, 87, 20))
        self.checkBox_LP.setObjectName("checkBox_LP")
        self.checkBox_UF = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_UF.setGeometry(QtCore.QRect(900, 405, 87, 20))
        self.checkBox_UF.setObjectName("checkBox_UF")
        self.File02 = QtWidgets.QPushButton(self.centralwidget)
        self.File02.setGeometry(QtCore.QRect(20, 440, 200, 40))
        self.File02.setObjectName("File02")
        self.Image02 = QtWidgets.QLabel(self.centralwidget)
        self.Image02.setGeometry(QtCore.QRect(30, 515, 1000, 300))
        self.Image02.setObjectName("Image02")
        self.checkBox_UV2 = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_UV2.setGeometry(QtCore.QRect(100, 480, 87, 20))
        self.checkBox_UV2.setObjectName("checkBox_UV2")
        self.checkBox_NIR2 = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_NIR2.setGeometry(QtCore.QRect(300, 480, 87, 20))
        self.checkBox_NIR2.setObjectName("checkBox_NIR2")
        self.checkBox_DR2 = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_DR2.setGeometry(QtCore.QRect(500, 480, 87, 20))
        self.checkBox_DR2.setObjectName("checkBox_DR2")
        self.checkBox_LR2 = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_LR2.setGeometry(QtCore.QRect(700, 480, 87, 20))
        self.checkBox_LR2.setObjectName("checkBox_LR2")
        self.checkBox_OR2 = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_OR2.setGeometry(QtCore.QRect(900, 480, 87, 20))
        self.checkBox_OR2.setObjectName("checkBox_OR2")
        self.checkBox_LG2 = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_LG2.setGeometry(QtCore.QRect(90, 830, 97, 20))
        self.checkBox_LG2.setObjectName("checkBox_LG2")
        self.checkBox_CY2 = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_CY2.setGeometry(QtCore.QRect(300, 830, 87, 20))
        self.checkBox_CY2.setObjectName("checkBox_CY2")
        self.checkBox_BL2 = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_BL2.setGeometry(QtCore.QRect(500, 830, 87, 20))
        self.checkBox_BL2.setObjectName("checkBox_BL2")
        self.checkBox_LP2 = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_LP2.setGeometry(QtCore.QRect(700, 830, 87, 20))
        self.checkBox_LP2.setObjectName("checkBox_LP2")
        self.checkBox_UF2 = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_UF2.setGeometry(QtCore.QRect(900, 830, 87, 20))
        self.checkBox_UF2.setObjectName("checkBox_UF2")
        self.line_vert = QtWidgets.QFrame(self.centralwidget)
        self.line_vert.setGeometry(QtCore.QRect(1050, 30, 20, 801))
        self.line_vert.setFrameShape(QtWidgets.QFrame.VLine)
        self.line_vert.setFrameShadow(QtWidgets.QFrame.Sunken)
        self.line_vert.setObjectName("line_vert")
        self.ImageAnalysisHeading = QtWidgets.QLabel(self.centralwidget)
        self.ImageAnalysisHeading.setGeometry(QtCore.QRect(1190, 20, 329, 22))
        font = QtGui.QFont()
        font.setPointSize(18)
        self.ImageAnalysisHeading.setFont(font)
        self.ImageAnalysisHeading.setObjectName("ImageAnalysisHeading")
        self.radioButton_ImageDif = QtWidgets.QRadioButton(self.centralwidget)
        self.radioButton_ImageDif.setGeometry(QtCore.QRect(1090, 670, 141, 20))
        self.radioButton_ImageDif.setObjectName("radioButton_ImageDif")
        self.radioButton_Otsu = QtWidgets.QRadioButton(self.centralwidget)
        self.radioButton_Otsu.setGeometry(QtCore.QRect(1090, 120, 211, 20))
        self.radioButton_Otsu.setObjectName("radioButton_Otsu")
        self.label_EdgeDetHeading = QtWidgets.QLabel(self.centralwidget)
        self.label_EdgeDetHeading.setGeometry(QtCore.QRect(1090, 180, 111, 16))
        self.label_EdgeDetHeading.setObjectName("label_EdgeDetHeading")
        self.radioButton_Canny = QtWidgets.QRadioButton(self.centralwidget)
        self.radioButton_Canny.setGeometry(QtCore.QRect(1090, 220, 161, 20))
        self.radioButton_Canny.setObjectName("radioButton_Canny")
        self.radioButton_laplacian = QtWidgets.QRadioButton(self.centralwidget)
        self.radioButton_laplacian.setGeometry(QtCore.QRect(1320, 220, 100, 20))
        self.radioButton_laplacian.setObjectName("radioButton_laplacian")
        self.radioButton_sobelx = QtWidgets.QRadioButton(self.centralwidget)
        self.radioButton_sobelx.setGeometry(QtCore.QRect(1090, 260, 100, 20))
        self.radioButton_sobelx.setObjectName("radioButton_sobelx")
        self.radioButton_sobely = QtWidgets.QRadioButton(self.centralwidget)
        self.radioButton_sobely.setGeometry(QtCore.QRect(1320, 260, 100, 20))
        self.radioButton_sobely.setObjectName("radioButton_sobely")
        self.radioButton_XRcustum = QtWidgets.QRadioButton(self.centralwidget)
        self.radioButton_XRcustum.setGeometry(QtCore.QRect(1090, 630, 100, 20))
        self.radioButton_XRcustum.setObjectName("radioButton_XRcustum")
        self.radioButton_plotH = QtWidgets.QRadioButton(self.centralwidget)
        self.radioButton_plotH.setGeometry(QtCore.QRect(1090, 710, 121, 20))
        self.radioButton_plotH.setObjectName("radioButton_plotH")
        self.radioButton_CLAHE = QtWidgets.QRadioButton(self.centralwidget)
        self.radioButton_CLAHE.setGeometry(QtCore.QRect(1530, 320, 100, 20))
        self.radioButton_CLAHE.setObjectName("radioButton_CLAHE")
        self.radioButton_Watershed = QtWidgets.QRadioButton(self.centralwidget)
        self.radioButton_Watershed.setGeometry(QtCore.QRect(1090, 320, 221, 20))
        self.radioButton_Watershed.setObjectName("radioButton_Watershed")
        self.radioButton_contours = QtWidgets.QRadioButton(self.centralwidget)
        self.radioButton_contours.setGeometry(QtCore.QRect(1320, 320, 100, 20))
        self.radioButton_contours.setObjectName("radioButton_contours")
        self.label_MorphHeading = QtWidgets.QLabel(self.centralwidget)
        self.label_MorphHeading.setGeometry(QtCore.QRect(1090, 380, 191, 16))
        self.label_MorphHeading.setObjectName("label_MorphHeading")
        self.radioButton_erosion = QtWidgets.QRadioButton(self.centralwidget)
        self.radioButton_erosion.setGeometry(QtCore.QRect(1090, 410, 100, 20))
        self.radioButton_erosion.setObjectName("radioButton_erosion")
        self.radioButton_dilation = QtWidgets.QRadioButton(self.centralwidget)
        self.radioButton_dilation.setGeometry(QtCore.QRect(1320, 410, 100, 20))
        self.radioButton_dilation.setObjectName("radioButton_dilation")
        self.radioButton_closing = QtWidgets.QRadioButton(self.centralwidget)
        self.radioButton_closing.setGeometry(QtCore.QRect(1530, 410, 100, 20))
        self.radioButton_closing.setObjectName("radioButton_closing")
        self.radioButton_opening = QtWidgets.QRadioButton(self.centralwidget)
        self.radioButton_opening.setGeometry(QtCore.QRect(1090, 450, 100, 20))
        self.radioButton_opening.setObjectName("radioButton_opening")
        self.radioButton_morphgradient = QtWidgets.QRadioButton(self.centralwidget)
        self.radioButton_morphgradient.setGeometry(QtCore.QRect(1320, 450, 171, 20))
        self.radioButton_morphgradient.setObjectName("radioButton_morphgradient")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(1200, 760, 291, 61))
        font = QtGui.QFont()
        font.setPointSize(18)
        self.pushButton.setFont(font)
        self.pushButton.setObjectName("pushButton")
        self.line = QtWidgets.QFrame(self.centralwidget)
        self.line.setGeometry(QtCore.QRect(27, 425, 1001, 20))
        self.line.setFrameShape(QtWidgets.QFrame.HLine)
        self.line.setFrameShadow(QtWidgets.QFrame.Sunken)
        self.line.setObjectName("line")
        self.pushButton_2 = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton_2.setGeometry(QtCore.QRect(1200, 510, 291, 61))
        font = QtGui.QFont()
        font.setPointSize(18)
        self.pushButton_2.setFont(font)
        self.pushButton_2.setObjectName("pushButton_2")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(1090, 80, 131, 16))
        font = QtGui.QFont()
        font.setPointSize(14)
        self.label.setFont(font)
        self.label.setObjectName("label")
        self.label_2 = QtWidgets.QLabel(self.centralwidget)
        self.label_2.setGeometry(QtCore.QRect(1090, 590, 131, 16))
        font = QtGui.QFont()
        font.setPointSize(14)
        self.label_2.setFont(font)
        self.label_2.setObjectName("label_2")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 1640, 22))
        self.menubar.setObjectName("menubar")
        self.menuMulti_Spectrum_Computer_Vision = QtWidgets.QMenu(self.menubar)
        font = QtGui.QFont()
        font.setPointSize(18)
        self.menuMulti_Spectrum_Computer_Vision.setFont(font)
        self.menuMulti_Spectrum_Computer_Vision.setObjectName("menuMulti_Spectrum_Computer_Vision")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)
        self.menubar.addAction(self.menuMulti_Spectrum_Computer_Vision.menuAction())
        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)



    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.File01.setText(_translate("MainWindow", "Browse File (Image 1)"))
        self.Image01.setText(_translate("MainWindow", "Image01"))
        self.checkBox_UV.setText(_translate("MainWindow", "UV"))
        self.checkBox_NIR.setText(_translate("MainWindow", "NIR"))
        self.checkBox_DR.setText(_translate("MainWindow", "Dark Red"))
        self.checkBox_LR.setText(_translate("MainWindow", "Light Red"))
        self.checkBox_OR.setText(_translate("MainWindow", "Orange"))
        self.checkBox_LG.setText(_translate("MainWindow", "Light Green"))
        self.checkBox_CY.setText(_translate("MainWindow", "Cyan"))
        self.checkBox_BL.setText(_translate("MainWindow", "Blue"))
        self.checkBox_LP.setText(_translate("MainWindow", "Polarized"))
        self.checkBox_UF.setText(_translate("MainWindow", "Unfiltered"))
        self.File02.setText(_translate("MainWindow", "Browse File (Image 2)"))
        self.Image02.setText(_translate("MainWindow", "Image02"))
        self.checkBox_UV2.setText(_translate("MainWindow", "UV"))
        self.checkBox_NIR2.setText(_translate("MainWindow", "NIR"))
        self.checkBox_DR2.setText(_translate("MainWindow", "Dark Red"))
        self.checkBox_LR2.setText(_translate("MainWindow", "Light Red"))
        self.checkBox_OR2.setText(_translate("MainWindow", "Orange"))
        self.checkBox_LG2.setText(_translate("MainWindow", "Light Green"))
        self.checkBox_CY2.setText(_translate("MainWindow", "Cyan"))
        self.checkBox_BL2.setText(_translate("MainWindow", "Blue"))
        self.checkBox_LP2.setText(_translate("MainWindow", "Polarized"))
        self.checkBox_UF2.setText(_translate("MainWindow", "Unfiltered"))
        self.ImageAnalysisHeading.setText(_translate("MainWindow", "SELECT IMAGE ANALYSIS TO PERFORM"))
        self.radioButton_ImageDif.setText(_translate("MainWindow", "Image Difference"))
        self.radioButton_Otsu.setText(_translate("MainWindow", "Binarization (Otsu Threshold)"))
        self.label_EdgeDetHeading.setText(_translate("MainWindow", "Edge Detection"))
        self.radioButton_Canny.setText(_translate("MainWindow", "Canny Edge Detection"))
        self.radioButton_laplacian.setText(_translate("MainWindow", "Laplacian"))
        self.radioButton_sobelx.setText(_translate("MainWindow", "Sobel X"))
        self.radioButton_sobely.setText(_translate("MainWindow", "Sobel Y"))
        self.radioButton_XRcustum.setText(_translate("MainWindow", "XR Custom"))
        self.radioButton_plotH.setText(_translate("MainWindow", "Plot Histogram"))
        self.radioButton_CLAHE.setText(_translate("MainWindow", "CLAHE"))
        self.radioButton_Watershed.setText(_translate("MainWindow", "Watershed Image Segmentation"))
        self.radioButton_contours.setText(_translate("MainWindow", "Contours"))
        self.label_MorphHeading.setText(_translate("MainWindow", "Morphological Transformations"))
        self.radioButton_erosion.setText(_translate("MainWindow", "Erosion"))
        self.radioButton_dilation.setText(_translate("MainWindow", "Dilation"))
        self.radioButton_closing.setText(_translate("MainWindow", "Closing"))
        self.radioButton_opening.setText(_translate("MainWindow", "Opening"))
        self.radioButton_morphgradient.setText(_translate("MainWindow", "Morphological Gradient"))
        self.pushButton.setText(_translate("MainWindow", "RUN & SAVE"))
        self.pushButton_2.setText(_translate("MainWindow", "SAVE OUTPUT"))
        self.label.setText(_translate("MainWindow", "PREPROCESSING"))
        self.label_2.setText(_translate("MainWindow", "IMAGE ANALYSIS"))
        self.menuMulti_Spectrum_Computer_Vision.setTitle(_translate("MainWindow", "Multi-Spectrum Computer Vision")) 

I know it is something to do with the self.imageFiles1[i] class variable and my lack of understanding of pyQT5. Can someone elaborate how to treat global variables in a pyQT5 run script?

Answer 1

imag = cv2.imread(imag, 0) returns a greyscale image so imag.data will be an ndarray containing height*width 8-bit integers instead of height*width*3 which is what is needed for QtGui.QImage(imag.data, imag.shape[1], imag.shape[0], QtGui.QImage.Format_RGB888) . To load a color image use imag = cv2.imread(imag, 1) (or simply imag = cv2.imread(imag) since flag == 1 is the default).

As an alternative you could just use the file name to initialize the QImage object instead of constructing an OpenCV image first.

imag = QtGui.QImage(self.imageFiles1['photo_Blue'])