軟硬體的天空: 3月 2024

Purpose:

利用QT Designer設計一個python的介面, 來練習一些影像處裡的python 程式.

Use QT Designer to design a python interface to practice some python programs in image processing.

1. 先用 Qt Designer 設計好界面，產生一個 .ui 檔
2. 進 Terminal 輸入以下指令產生可引入的 .py 檔
pyuic5 -x example.ui -o example_ui.py 主程式產生畫面用

pyuic5 -x tab.ui -o tab.py

Fundamental:

Anaconda3 install Qt Designer

pip install pyqt5

pip install pyqt5-tools

Anaconda3 install Opencv

pip install opencv-python

Python code:

Tab.py

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

# Form implementation generated from reading ui file 'tab.ui'
#
# Created by: PyQt5 UI code generator 5.15.9
#
# 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(894, 639)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.tabWidget = QtWidgets.QTabWidget(self.centralwidget)
        self.tabWidget.setGeometry(QtCore.QRect(0, 0, 600, 560))
        self.tabWidget.setObjectName("tabWidget")
        self.tab = QtWidgets.QWidget()
        self.tab.setObjectName("tab")
        self.label_2 = QtWidgets.QLabel(self.tab)
        self.label_2.setGeometry(QtCore.QRect(0, 0, 491, 531))
        self.label_2.setObjectName("label_2")
        self.pushButton = QtWidgets.QPushButton(self.tab)
        self.pushButton.setGeometry(QtCore.QRect(470, 0, 121, 31))
        self.pushButton.setObjectName("pushButton")
        self.pushButton_2 = QtWidgets.QPushButton(self.tab)
        self.pushButton_2.setGeometry(QtCore.QRect(470, 30, 121, 31))
        self.pushButton_2.setObjectName("pushButton_2")
        self.tabWidget.addTab(self.tab, "")
        self.tab_2 = QtWidgets.QWidget()
        self.tab_2.setObjectName("tab_2")
        self.label_3 = QtWidgets.QLabel(self.tab_2)
        self.label_3.setGeometry(QtCore.QRect(0, 0, 491, 531))
        self.label_3.setObjectName("label_3")
        self.pushButton_3 = QtWidgets.QPushButton(self.tab_2)
        self.pushButton_3.setGeometry(QtCore.QRect(470, 0, 121, 31))
        self.pushButton_3.setObjectName("pushButton_3")
        self.pushButton_4 = QtWidgets.QPushButton(self.tab_2)
        self.pushButton_4.setGeometry(QtCore.QRect(470, 30, 121, 31))
        self.pushButton_4.setObjectName("pushButton_4")
        self.tabWidget.addTab(self.tab_2, "")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(610, 0, 191, 560))
        self.label.setObjectName("label")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 894, 21))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        self.tabWidget.setCurrentIndex(1)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.label_2.setText(_translate("MainWindow", "TextLabel"))
        self.pushButton.setText(_translate("MainWindow", "PushButton"))
        self.pushButton_2.setText(_translate("MainWindow", "PushButton"))
        self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab), _translate("MainWindow", "Tab 1"))
        self.label_3.setText(_translate("MainWindow", "TextLabel"))
        self.pushButton_3.setText(_translate("MainWindow", "PushButton"))
        self.pushButton_4.setText(_translate("MainWindow", "PushButton"))
        self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab_2), _translate("MainWindow", "Tab 2"))
        self.label.setText(_translate("MainWindow", "TextLabel"))

'''
if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())
'''

main.py

from WebCam import Ui_MainWindow
from PyQt5.QtWidgets import QApplication, QMainWindow

if __name__ == "__main__":
    import sys
    app = QApplication(sys.argv)
    MainWindow = QMainWindow()
    ui = Ui_MainWindow(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

webcam.py

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtGui import QImage, QIcon, QPixmap, QPalette, QBrush, QColor, QFontDatabase, QFont
import sys
import cv2

class FrameGrabber(QtCore.QThread):
    def __init__(self, parent=None):
        super(FrameGrabber, self).__init__(parent)

    signal = QtCore.pyqtSignal(QtGui.QImage) # 建立信號物件

    def run(self):
        cap = cv2.VideoCapture(0)
        #cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 720)
        #cap.set(cv2.CAP_PROP_FRAME_WIDTH, 1280)
        cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 640)
        cap.set(cv2.CAP_PROP_FRAME_WIDTH, 800)
        while cap.isOpened():
            success, frame = cap.read()
            if success:
                #image = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB) # 色彩轉換
                image = QtGui.QImage(frame, frame.shape[1], frame.shape[0], QtGui.QImage.Format_BGR888)
                self.signal.emit(image)  # 發送信號

class Ui_MainWindow(QtWidgets.QMainWindow):
    def __init__(self, MainWindow):
        super().__init__()
        self.MainWindow = MainWindow
        screen = QtWidgets.QApplication.desktop()
        width = screen.width()
        height = screen.height()
        print(width, height)
        line = str(width)+'\n'
        line += str(height)
        
        self.setupUi(self.MainWindow)
        self.label.setText(line)

        data = [
            ['test', 'gui', 20],
        ]
        #-----------------------------------------------------------------------
        #self.insert_data(self.tableWidget, data)
        '''
        self.grabber = FrameGrabber()
        self.grabber.signal.connect(self.updateFrame) # 監聽信號
        self.grabber.start()
        '''
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(894, 639)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.tabWidget = QtWidgets.QTabWidget(self.centralwidget)
        self.tabWidget.setGeometry(QtCore.QRect(0, 0, 600, 560))
        self.tabWidget.setObjectName("tabWidget")
        self.tab = QtWidgets.QWidget()
        self.tab.setObjectName("tab")
        self.label_2 = QtWidgets.QLabel(self.tab)
        self.label_2.setGeometry(QtCore.QRect(0, 0, 491, 531))
        self.label_2.setObjectName("label_2")
        self.pushButton = QtWidgets.QPushButton(self.tab)
        self.pushButton.setGeometry(QtCore.QRect(470, 0, 121, 31))
        self.pushButton.setObjectName("pushButton")
        self.pushButton.clicked.connect(self.videoRun)

        self.pushButton_2 = QtWidgets.QPushButton(self.tab)
        self.pushButton_2.setGeometry(QtCore.QRect(470, 30, 121, 31))
        self.pushButton_2.setObjectName("pushButton_2")
        self.pushButton_2.clicked.connect(self.quitApp)

        self.tabWidget.addTab(self.tab, "")
        self.tab_2 = QtWidgets.QWidget()
        self.tab_2.setObjectName("tab_2")
        self.label_3 = QtWidgets.QLabel(self.tab_2)
        self.label_3.setGeometry(QtCore.QRect(0, 0, 491, 531))
        self.label_3.setObjectName("label_3")
        self.pushButton_3 = QtWidgets.QPushButton(self.tab_2)
        self.pushButton_3.setGeometry(QtCore.QRect(470, 0, 121, 31))
        self.pushButton_3.setObjectName("pushButton_3")
        self.pushButton_4 = QtWidgets.QPushButton(self.tab_2)
        self.pushButton_4.setGeometry(QtCore.QRect(470, 30, 121, 31))
        self.pushButton_4.setObjectName("pushButton_4")
        self.tabWidget.addTab(self.tab_2, "")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(610, 0, 191, 560))
        self.label.setObjectName("label")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 894, 21))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        self.tabWidget.setCurrentIndex(0)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.label_2.setText(_translate("MainWindow", "TextLabel"))
        self.pushButton.setText(_translate("MainWindow", "OpenVedio"))
        self.pushButton_2.setText(_translate("MainWindow", "Quit"))
        self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab), _translate("MainWindow", "Tab 1"))
        self.label_3.setText(_translate("MainWindow", "TextLabel"))
        self.pushButton_3.setText(_translate("MainWindow", "PushButton"))
        self.pushButton_4.setText(_translate("MainWindow", "PushButton"))
        self.tabWidget.setTabText(self.tabWidget.indexOf(self.tab_2), _translate("MainWindow", "Tab 2"))
        self.label.setText(_translate("MainWindow", "TextLabel"))

    @QtCore.pyqtSlot(QtGui.QImage)
    def updateFrame(self, image):
        self.label_2.setPixmap(QtGui.QPixmap.fromImage(image))

    def insert_data(self, tableWidget, data):
        row0 = data[0] if len(data) else []
        tableWidget.setRowCount(len(data))
        tableWidget.setColumnCount(len(row0))
        
        for r, row in enumerate(data):
            for c, item in enumerate(row):
                tableWidget.setItem(r, c, QtWidgets.QTableWidgetItem(str(item)))    

    def quitApp(self):
        QtWidgets.QApplication.quit()
        '''
        line = "line 1"+'\n'
        line += "line 2"
        self.label.setText(line) #You can't call setText() twice
        '''
        
    def videoRun(self):
        self.grabber = FrameGrabber()
        self.grabber.signal.connect(self.updateFrame) # 監聽信號
        self.grabber.start()