就是对图像处理程序的一点简单包装，两个label控件用来显示图像，通过输入的全局阈值将不同二值化的图像呈现在右侧。
首先需要安装pyqt5，然后通过pyuic5命令转化。
pip install pyqt5 pyuic5 -o dialog.py dialog.ui转换后的py文件
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'dialog.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_Dialog(object):
def setupUi(self, Dialog):
Dialog.setObjectName("Dialog")
Dialog.resize(915, 545)
self.horizontalLayoutWidget = QtWidgets.QWidget(Dialog)
self.horizontalLayoutWidget.setGeometry(QtCore.QRect(20, 20, 291, 411))
self.horizontalLayoutWidget.setObjectName("horizontalLayoutWidget")
self.horizontalLayout = QtWidgets.QHBoxLayout(self.horizontalLayoutWidget)
self.horizontalLayout.setContentsMargins(0, 0, 0, 0)
self.horizontalLayout.setObjectName("horizontalLayout")
self.lb1 = QtWidgets.QLabel(self.horizontalLayoutWidget)
self.lb1.setObjectName("lb1")
self.horizontalLayout.addWidget(self.lb1)
self.horizontalLayoutWidget_2 = QtWidgets.QWidget(Dialog)
self.horizontalLayoutWidget_2.setGeometry(QtCore.QRect(330, 20, 321, 411))
self.horizontalLayoutWidget_2.setObjectName("horizontalLayoutWidget_2")
self.horizontalLayout_2 = QtWidgets.QHBoxLayout(self.horizontalLayoutWidget_2)
self.horizontalLayout_2.setContentsMargins(0, 0, 0, 0)
self.horizontalLayout_2.setObjectName("horizontalLayout_2")
self.lb2 = QtWidgets.QLabel(self.horizontalLayoutWidget_2)
self.lb2.setObjectName("lb2")
self.horizontalLayout_2.addWidget(self.lb2)
self.open_btn = QtWidgets.QPushButton(Dialog)
self.open_btn.setGeometry(QtCore.QRect(20, 440, 93, 28))
self.open_btn.setObjectName("open_btn")
self.input_line = QtWidgets.QLineEdit(Dialog)
self.input_line.setGeometry(QtCore.QRect(130, 440, 113, 21))
self.input_line.setObjectName("input_line")
self.process_bi_btn = QtWidgets.QPushButton(Dialog)
self.process_bi_btn.setGeometry(QtCore.QRect(260, 440, 93, 28))
self.process_bi_btn.setObjectName("process_bi_btn")
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
def retranslateUi(self, Dialog):
_translate = QtCore.QCoreApplication.translate
Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
self.lb1.setText(_translate("Dialog", "TextLabel"))
self.lb2.setText(_translate("Dialog", "TextLabel"))
self.open_btn.setText(_translate("Dialog", "打开文件"))
self.input_line.setText(_translate("Dialog", "请输入阈值..."))
self.process_bi_btn.setText(_translate("Dialog", "二值化"))
在这个基础上，加上主函数就可以看到窗体了
def main():
"""
主函数，用于运行程序
:return: None
"""
app = QtWidgets.QApplication(sys.argv)
dialog = QtWidgets.QDialog()
ui = Ui_Dialog()
ui.setupUi(dialog)
dialog.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
效果
3、添加信号和槽函数
绑定信号和槽
# 绑定槽函数 self.open_btn.clicked.connect(self.open_buttonclicked) self.process_bi_btn.clicked.connect(self.process_bi_btnclicked)槽函数
def open_buttonclicked(self):
fileName, fileType = QFileDialog.getOpenFileName(self, "选取文件", os.getcwd(),"All Files(*);;Text Files(*.txt)")
# print("fileName: ",fileName)
# print("fileType: ",fileType)
save_fpath=self.scaleImg(fileName)
if save_fpath is not None:
print("文件已存在：{}".format(save_fpath))
self.ori_path=save_fpath
pix = QPixmap(save_fpath)
self.lb1.setPixmap(pix)
def process_bi_btnclicked(self):
img=cv2.imread(self.ori_path)
# 获取输入的阈值
thresh=self.input_line.text()
ret1, th1 = cv2.threshold(img, int(thresh), 255, cv2.THRESH_BINARY)
height, width, bytesPerComponent = th1.shape
bytesPerLine = 3 * width
# QImg = QImage(th1.data, width, height, bytesPerLine, QImage.Format_RGB888)
QImg = QImage(th1.data, width, height, bytesPerLine,QImage.Format_Grayscale8)
pixmap = QPixmap.fromImage(QImg)
self.lb2.setPixmap(pixmap)
完整代码
# -*- coding: utf-8 -*-
# Form implementation generated from reading ui file 'dialog.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, QtWidgets
from PyQt5.QtWidgets import (QWidget, QApplication,QLabel,QFileDialog,QPushButton,QHBoxLayout,QLineEdit)
from PyQt5.QtGui import QPixmap,QImage
import sys,os
import cv2
class Ui_Dialog(QtWidgets.QMainWindow):
def setupUi(self, Dialog):
# 原图的路径
self.ori_path=''
Dialog.setObjectName("Dialog")
Dialog.resize(1800, 1000)
self.horizontalLayoutWidget = QtWidgets.QWidget(Dialog)
self.horizontalLayoutWidget.setGeometry(QtCore.QRect(20, 20, 291, 411))
self.horizontalLayoutWidget.setObjectName("horizontalLayoutWidget")
self.horizontalLayout = QtWidgets.QHBoxLayout(self.horizontalLayoutWidget)
self.horizontalLayout.setContentsMargins(0, 0, 0, 0)
self.horizontalLayout.setObjectName("horizontalLayout")
self.lb1 = QtWidgets.QLabel(self.horizontalLayoutWidget)
self.lb1.setObjectName("lb1")
self.horizontalLayout.addWidget(self.lb1)
self.horizontalLayoutWidget_2 = QtWidgets.QWidget(Dialog)
self.horizontalLayoutWidget_2.setGeometry(QtCore.QRect(330, 20, 321, 411))
self.horizontalLayoutWidget_2.setObjectName("horizontalLayoutWidget_2")
self.horizontalLayout_2 = QtWidgets.QHBoxLayout(self.horizontalLayoutWidget_2)
self.horizontalLayout_2.setContentsMargins(0, 0, 0, 0)
self.horizontalLayout_2.setObjectName("horizontalLayout_2")
self.lb2 = QtWidgets.QLabel(self.horizontalLayoutWidget_2)
self.lb2.setObjectName("lb2")
self.horizontalLayout_2.addWidget(self.lb2)
self.open_btn = QtWidgets.QPushButton(Dialog)
self.open_btn.setGeometry(QtCore.QRect(20, 440, 93, 28))
self.open_btn.setObjectName("open_btn")
self.input_line = QtWidgets.QLineEdit(Dialog)
self.input_line.setGeometry(QtCore.QRect(130, 440, 113, 21))
self.input_line.setObjectName("input_line")
self.process_bi_btn = QtWidgets.QPushButton(Dialog)
self.process_bi_btn.setGeometry(QtCore.QRect(260, 440, 93, 28))
self.process_bi_btn.setObjectName("process_bi_btn")
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
# 绑定槽函数
self.open_btn.clicked.connect(self.open_buttonclicked)
self.process_bi_btn.clicked.connect(self.process_bi_btnclicked)
def retranslateUi(self, Dialog):
_translate = QtCore.QCoreApplication.translate
Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
self.lb1.setText(_translate("Dialog", "TextLabel"))
self.lb2.setText(_translate("Dialog", "TextLabel"))
self.open_btn.setText(_translate("Dialog", "打开文件"))
self.input_line.setText(_translate("Dialog", "请输入阈值..."))
self.process_bi_btn.setText(_translate("Dialog", "二值化"))
def open_buttonclicked(self):
fileName, fileType = QFileDialog.getOpenFileName(self, "选取文件", os.getcwd(),"All Files(*);;Text Files(*.txt)")
# print("fileName: ",fileName)
# print("fileType: ",fileType)
save_fpath=self.scaleImg(fileName)
if save_fpath is not None:
print("文件已存在：{}".format(save_fpath))
self.ori_path=save_fpath
pix = QPixmap(save_fpath)
self.lb1.setPixmap(pix)
def process_bi_btnclicked(self):
img=cv2.imread(self.ori_path)
# 获取输入的阈值
thresh=self.input_line.text()
ret1, th1 = cv2.threshold(img, int(thresh), 255, cv2.THRESH_BINARY)
height, width, bytesPerComponent = th1.shape
bytesPerLine = 3 * width
# QImg = QImage(th1.data, width, height, bytesPerLine, QImage.Format_RGB888)
QImg = QImage(th1.data, width, height, bytesPerLine,QImage.Format_Grayscale8)
pixmap = QPixmap.fromImage(QImg)
self.lb2.setPixmap(pixmap)
def scaleImg(self,fpath):
dir = os.path.dirname(fpath)
fname = fpath.split('/')[-1]
save_fpath=dir+'/cvt_'+fname
if os.path.exists(save_fpath):
return save_fpath
img=cv2.imread(fpath)
img_test2 = cv2.resize(img, (300, 200),interpolation=cv2.INTER_NEAREST)
cv2.imwrite(save_fpath,img_test2)
return save_fpath
def main():
"""
主函数，用于运行程序
:return: None
"""
app = QtWidgets.QApplication(sys.argv)
dialog = QtWidgets.QDialog()
ui = Ui_Dialog()
ui.setupUi(dialog)
dialog.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
遇到问题
- 我在getOpenFileName方法这里，遇到第一个参数必须是继承于QtWidgets对象的问题，所以修改了Ui_Dialog让其直接继承于QtWidgets.QMainWindow
fileName, fileType = QFileDialog.getOpenFileName(self, "选取文件", os.getcwd(),"All Files(*);;Text Files(*.txt)")最终效果
