pyqt5执行操作后窗口非正常退出

Question

最近在做数字图像可视化的实验，学着别人的代码自己写，写到一半准备先试一下读取并显示图片，但是发现选择文件后窗口自己就退出了，后来发现不管按哪个都会直接退出

代码如下：

from PyQt5 import QtWidgets
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from jiemian import Ui_mainWindow
import numpy as np
import sys
import cv2
import matplotlib.pyplot as plt

tmp_path="C:\\Users\\nobody\\Desktop\\tmp"

class Demo(QtWidgets.QMainWindow, Ui_mainWindow):
    def __init__(self):
        super(Demo, self).__init__()
        self.setupUi(self)

        # 打开文件
        self.actionopen.triggered.connect(self.read_file)
        #清空
        self.pushButton.clicked.connect(self.clear)

        #直方图均衡
        self.actionjunhenghua.triggered.connect(self.equal_func)
        #高斯噪声
        self.actiongaosi.triggered.connect(self.gaussnoi_func)
        #sobel
        self.actionsobel.triggered.connect(self.sobel)
        #lapres
        self.actionlapres.triggered.connect(self.lapres)
        '''
        #同态
        self.actiontongtai.triggered.connect(self.huidu)
        '''



    def read_file(self):
      # 打开原始图像
        filename, filetype = QFileDialog.getOpenFileName(self, "打开文件", "D:/", "All Files(*);;Text Files(*.png)")
        if filetype == '':  # 若路径无效或打开文件失败，则什么也不做，让用户回到主界面
         return

        img = cv2.imread(filename)  # 用cv库打开文件
        global imgorg
        imgorg = img
        cv2.imwrite(tmp_path, img)  # 将处理后的图像保存在临时路径中
       # 这里虽然只是打开图像而没有进行处理，但是也会拷贝一份作为缓存，供后续的图像处理函数读取
        self.label.setPixmap(tmp_path)  # 读取原始图像并显示


    def equal_func(self):
        # 直方图均衡
        img = cv2.imread(tmp_path)  # 读取临时路径中的图像
        src = img.copy()
        des = np.empty(src.shape, dtype=np.uint8)
        x = np.zeros([256])  # 8位数字图像一共有256个像素
        for i in range(src.shape[0]):
            for j in range(src.shape[1]):
                x[src[i][j]] += 1
        x = x / src.size

        sum_x = np.zeros([256])
        for i, _ in enumerate(x):
            sum_x[i] = sum(x[:i])

        for i in range(src.shape[0]):
            for j in range(src.shape[1]):
                des[i][j] = 255 * sum_x[src[i][j]]

        cv2.imwrite(tmp_path, des)  # 将处理后的图像保存在临时路径中
        self.label_2.setPixmap(QPixmap(tmp_path))  # 显示处理后的图像


    def gaussnoi_func(self):

        img = cv2.imread(tmp_path, 0)  # 读取临时路径中的图像
        src = img.copy()
        des = np.empty(src.shape, dtype=np.uint8)
        try:  # 如果输入的参数有效，则以该参数处理图像
            p1 = float(self.para1.toPlainText())
            p2 = float(self.para2.toPlainText())
            src = img.copy()
            src = np.array(src / 255, dtype=float)
            noise = np.random.normal(p1, p2 ** 0.5, src.shape)
            des = src + noise
            if des.min() < 0:
                low_clip = -1.
            else:
                low_clip = 0.
            des = np.clip(des, low_clip, 1.0)
            des = np.uint8(des * 255)
        except Exception:  # 否则，以默认的方式处理图像
            src = img.copy()
            src = np.array(src / 255, dtype=float)
            noise = np.random.normal(0, 1 ** 0.5, src.shape)
            des = src + noise
            if des.min() < 0:
                low_clip = -1.
            else:
                low_clip = 0.
            des = np.clip(des, low_clip, 1.0)
            des = np.uint8(des * 255)
        cv2.imwrite(tmp_path, des)  # 将处理后的图像保存在临时路径中
        self.label_2.setPixmap(QPixmap(tmp_path))  # 显示处理后的图像



# sobel算子
    def sobel(self):
        x = cv2.Sobel(tmp_path, cv2.CV_16S, 1, 0)
        y = cv2.Sobel(tmp_path, cv2.CV_16S, 0, 1)
        absx = cv2.convertScaleAbs(x)
        absy = cv2.convertScaleAbs(y)
        Sobel = cv2.addWeighted(absx, 0.5, absy, 0.5, 0)
        # 将图像颜色从RGB转换为RGBA
        img_cv = cv2.cvtColor(Sobel, cv2.COLOR_BGR2RGB)
        cv2.imwrite(tmp_path, img_cv)  # 将处理后的图像保存在临时路径中
        self.label_2.setPixmap(QPixmap(tmp_path))

#lapres
    def lapres(self):
        gimg=cv2.cvtColor(tmp_path,cv2.COLOR_BGR2GRAY)
        kernel=np.array([[0,-1,0],[-1,5,-1],[0,-1,0]],np,32)
        dst=cv2.filter2D(tmp_path,-1,kernel-kernel)   #调用opencv
        imgesl=np.hstack([tmp_path,dst])
        cv2.imwrite(tmp_path, imgesl)  # 将处理后的图像保存在临时路径中
        self.label_2.setPixmap(QPixmap(tmp_path))

#清空
    def clear(self):
        tmp_path=imgorg
        self.label_2.setPixmap(QPixmap(tmp_path))

#同态滤波器

if __name__ == '__main__':
    app = QApplication(sys.argv)
    demo = Demo()
    demo.show()
    sys.exit(app.exec_())

后面是ui代码：

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

# Form implementation generated from reading ui file 'jiemian.ui'
#
# Created by: PyQt5 UI code generator 5.15.4
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again.  Do not edit this file unless you know what you are doing.


from PyQt5 import QtCore, QtGui, QtWidgets


class Ui_mainWindow(object):
    def setupUi(self, mainWindow):
        mainWindow.setObjectName("mainWindow")
        mainWindow.resize(806, 620)
        self.centralwidget = QtWidgets.QWidget(mainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(280, 450, 121, 41))
        self.pushButton.setObjectName("pushButton")
        self.label_2 = QtWidgets.QLabel(self.centralwidget)
        self.label_2.setGeometry(QtCore.QRect(420, 10, 361, 371))
        self.label_2.setObjectName("label_2")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(10, 20, 361, 361))
        self.label.setObjectName("label")
        mainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(mainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 806, 22))
        self.menubar.setObjectName("menubar")
        self.menu = QtWidgets.QMenu(self.menubar)
        self.menu.setObjectName("menu")
        self.menu_2 = QtWidgets.QMenu(self.menubar)
        self.menu_2.setObjectName("menu_2")
        self.menu_3 = QtWidgets.QMenu(self.menubar)
        self.menu_3.setObjectName("menu_3")
        self.menu_4 = QtWidgets.QMenu(self.menubar)
        self.menu_4.setObjectName("menu_4")
        self.menu_5 = QtWidgets.QMenu(self.menubar)
        self.menu_5.setObjectName("menu_5")
        self.menu_6 = QtWidgets.QMenu(self.menubar)
        self.menu_6.setObjectName("menu_6")
        mainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(mainWindow)
        self.statusbar.setObjectName("statusbar")
        mainWindow.setStatusBar(self.statusbar)
        self.actionopen = QtWidgets.QAction(mainWindow)
        self.actionopen.setObjectName("actionopen")
        self.actionjiaoyan = QtWidgets.QAction(mainWindow)
        self.actionjiaoyan.setObjectName("actionjiaoyan")
        self.actiongaosi = QtWidgets.QAction(mainWindow)
        self.actiongaosi.setObjectName("actiongaosi")
        self.actionjunyun = QtWidgets.QAction(mainWindow)
        self.actionjunyun.setObjectName("actionjunyun")
        self.actionlapres = QtWidgets.QAction(mainWindow)
        self.actionlapres.setObjectName("actionlapres")
        self.actionsobel = QtWidgets.QAction(mainWindow)
        self.actionsobel.setObjectName("actionsobel")
        self.actiontongtai = QtWidgets.QAction(mainWindow)
        self.actiontongtai.setObjectName("actiontongtai")
        self.actionjunhenghua = QtWidgets.QAction(mainWindow)
        self.actionjunhenghua.setObjectName("actionjunhenghua")
        self.menu.addSeparator()
        self.menu.addAction(self.actionopen)
        self.menu_2.addSeparator()
        self.menu_2.addAction(self.actiontongtai)
        self.menu_3.addSeparator()
        self.menu_3.addAction(self.actionjunhenghua)
        self.menu_4.addAction(self.actionlapres)
        self.menu_4.addAction(self.actionsobel)
        self.menu_6.addAction(self.actionjiaoyan)
        self.menu_6.addAction(self.actiongaosi)
        self.menu_6.addAction(self.actionjunyun)
        self.menubar.addAction(self.menu.menuAction())
        self.menubar.addAction(self.menu_2.menuAction())
        self.menubar.addAction(self.menu_3.menuAction())
        self.menubar.addAction(self.menu_4.menuAction())
        self.menubar.addAction(self.menu_5.menuAction())
        self.menubar.addAction(self.menu_6.menuAction())

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

    def retranslateUi(self, mainWindow):
        _translate = QtCore.QCoreApplication.translate
        mainWindow.setWindowTitle(_translate("mainWindow", "数字图像可视化"))
        self.pushButton.setText(_translate("mainWindow", "清空"))
        self.label_2.setText(_translate("mainWindow", "处理后"))
        self.label.setText(_translate("mainWindow", "初始图"))
        self.menu.setTitle(_translate("mainWindow", "打开文件"))
        self.menu_2.setTitle(_translate("mainWindow", "同态滤波器"))
        self.menu_3.setTitle(_translate("mainWindow", "直方图处理"))
        self.menu_4.setTitle(_translate("mainWindow", "锐化"))
        self.menu_5.setTitle(_translate("mainWindow", "平滑"))
        self.menu_6.setTitle(_translate("mainWindow", "添加噪声"))
        self.actionopen.setText(_translate("mainWindow", "打开"))
        self.actionjiaoyan.setText(_translate("mainWindow", "jiaoyan"))
        self.actiongaosi.setText(_translate("mainWindow", "gaosi"))
        self.actionjunyun.setText(_translate("mainWindow", "junyun"))
        self.actionlapres.setText(_translate("mainWindow", "lapres"))
        self.actionsobel.setText(_translate("mainWindow", "sobel"))
        self.actiontongtai.setText(_translate("mainWindow", "tongtai"))
        self.actionjunhenghua.setText(_translate("mainWindow", "junhenghua"))

即使我照搬了参考的代码也还是不行，知识浅薄请各位求解，谢谢！

Answer 1

• 你可以参考下这个问题的回答, 看看是否对你有帮助, 链接: https://ask.csdn.net/questions/7692845