Python & PyQt5 : 摄像头和换屏
Python & PyQt5 : Camera and Changing Screen
我想在 Python 中使用 PyQt5 构建一个应用程序，但我遇到了一些错误，我尝试解决了很多次，但我不能。
我想先打开一个相机屏幕。在屏幕中，我们将看到我们的网络摄像头屏幕，底部有 2 个按钮（开始和捕获）。当我按下 Start 时，网络摄像头将打开，如果我按下 Capture 按钮，我想拍摄快照。
直到这里我都构建了工作代码。
按下捕获按钮并拍摄快照后，我想更改屏幕以进入第二个屏幕（或清理主屏幕），它只会在中间显示一个基本的 "Hello World" 句子，然后会有底部的按钮。
这是我的代码，我的错在哪里？你能修好吗？
import os
import cv2
import numpy as np
from PyQt5 import QtCore, QtGui, QtWidgets, uic
from PyQt5.QtWidgets import QApplication, QMainWindow, QPushButton, QWidget
class video (QtWidgets.QDialog):
def __init__(self):
super(video, self).__init__()
uic.loadUi('test2.ui',self)
self.control_bt.clicked.connect(self.start_webcam)
self.capture.clicked.connect(self.capture_image)
self.capture.clicked.connect(self.startUIWindow())
self.image_label.setScaledContents(True)
self.capture = None
self.timer = QtCore.QTimer(self, interval=5)
self.timer.timeout.connect(self.update_frame)
self._image_counter = 0
@QtCore.pyqtSlot()
def start_webcam(self):
if self.capture is None:
self.capture =cv2.VideoCapture(0)
self.capture.set(cv2.CAP_PROP_FRAME_HEIGHT, 480)
self.capture.set(cv2.CAP_PROP_FRAME_WIDTH, 640)
self.timer.start()
@QtCore.pyqtSlot()
def update_frame(self):
ret, image=self.capture.read()
simage = cv2.flip(image, 1)
self.displayImage(image, True)
@QtCore.pyqtSlot()
def capture_image(self):
flag, frame= self.capture.read()
path = r'D:\Users\ardad\PycharmProjects\testtest'
if flag:
QtWidgets.QApplication.beep()
name = "my_image.jpg"
cv2.imwrite(os.path.join(path, name), frame)
self._image_counter += 1
def displayImage(self, img, window=True):
qformat = QtGui.QImage.Format_Indexed8
if len(img.shape)==3 :
if img.shape[2]==4:
qformat = QtGui.QImage.Format_RGBA8888
else:
qformat = QtGui.QImage.Format_RGB888
outImage = QtGui.QImage(img, img.shape[1], img.shape[0], img.strides[0], qformat)
outImage = outImage.rgbSwapped()
if window:
self.image_label.setPixmap(QtGui.QPixmap.fromImage(outImage))
def startUIWindow(self):
self.Window = UIWindow(self)
self.setWindowTitle("UIWindow")
self.setCentralWidget(self.Window)
self.show()
class UIWindow(QWidget):
def __init__(self, parent=None):
super(UIWindow, self).__init__(parent)
self.ToolsBTN = QPushButton('text', self)
self.ToolsBTN.move(50, 350)
if __name__=='__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
window = video()
window.setWindowTitle('main code')
window.show()
sys.exit(app.exec_())
我正在添加从 "test2.ui"
转换而来的 .py 文件
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_Form(object):
def setupUi(self, Form):
Form.setObjectName("Form")
Form.resize(525, 386)
self.horizontalLayout = QtWidgets.QHBoxLayout(Form)
self.horizontalLayout.setObjectName("horizontalLayout")
self.verticalLayout = QtWidgets.QVBoxLayout()
self.verticalLayout.setObjectName("verticalLayout")
self.image_label = QtWidgets.QLabel(Form)
self.image_label.setText("")
self.image_label.setObjectName("image_label")
self.verticalLayout.addWidget(self.image_label)
self.control_bt = QtWidgets.QPushButton(Form)
self.control_bt.setObjectName("control_bt")
self.verticalLayout.addWidget(self.control_bt)
self.capture = QtWidgets.QPushButton(Form)
self.capture.setObjectName("capture")
self.verticalLayout.addWidget(self.capture)
self.horizontalLayout.addLayout(self.verticalLayout)
self.retranslateUi(Form)
QtCore.QMetaObject.connectSlotsByName(Form)
def retranslateUi(self, Form):
_translate = QtCore.QCoreApplication.translate
Form.setWindowTitle(_translate("Form", "Cam view"))
self.control_bt.setText(_translate("Form", "Start"))
self.capture.setText(_translate("Form", "Capture"))
当我运行这段代码时，它显示；
AttributeError: 'video' 对象没有属性 'setCentralWidget'
试一试：
main.py
import os
import cv2
import numpy as np
from PyQt5 import QtCore, QtGui, QtWidgets # uic
from PyQt5.QtWidgets import (QApplication, QMainWindow, QPushButton, QWidget,
QLabel, QVBoxLayout) # +++
from test2_ui import Ui_Form # +++
class video (QtWidgets.QDialog, Ui_Form):
def __init__(self):
super().__init__()
# uic.loadUi('test2.ui',self) # ---
self.setupUi(self) # +++
self.control_bt.clicked.connect(self.start_webcam)
self.capture.clicked.connect(self.capture_image)
self.capture.clicked.connect(self.startUIWindow) # - ()
self.image_label.setScaledContents(True)
self.cap = None # -capture <-> +cap
self.timer = QtCore.QTimer(self, interval=5)
self.timer.timeout.connect(self.update_frame)
self._image_counter = 0
@QtCore.pyqtSlot()
def start_webcam(self):
if self.cap is None:
self.cap = cv2.VideoCapture(0)
self.cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 480)
self.cap.set(cv2.CAP_PROP_FRAME_WIDTH, 640)
self.timer.start()
@QtCore.pyqtSlot()
def update_frame(self):
ret, image = self.cap.read()
simage = cv2.flip(image, 1)
self.displayImage(image, True)
@QtCore.pyqtSlot()
def capture_image(self):
flag, frame = self.cap.read()
path = r'D:\_Qt\Test\testtest' #
if flag:
QtWidgets.QApplication.beep()
name = "my_image.jpg"
cv2.imwrite(os.path.join(path, name), frame)
self._image_counter += 1
def displayImage(self, img, window=True):
qformat = QtGui.QImage.Format_Indexed8
if len(img.shape)==3 :
if img.shape[2]==4:
qformat = QtGui.QImage.Format_RGBA8888
else:
qformat = QtGui.QImage.Format_RGB888
outImage = QtGui.QImage(img, img.shape[1], img.shape[0], img.strides[0], qformat)
outImage = outImage.rgbSwapped()
if window:
self.image_label.setPixmap(QtGui.QPixmap.fromImage(outImage))
def startUIWindow(self):
self.Window = UIWindow() # - self
self.setWindowTitle("UIWindow")
# self.setCentralWidget(self.Window)
# self.show()
### +++ vvv
self.Window.ToolsBTN.clicked.connect(self.goWindow1)
self.hide()
self.Window.show()
def goWindow1(self):
self.show()
self.Window.hide()
### +++ ^^^
class UIWindow(QWidget):
def __init__(self, parent=None):
super(UIWindow, self).__init__(parent)
self.resize(300, 300)
self.label = QLabel("Hello World", alignment=QtCore.Qt.AlignCenter)
self.ToolsBTN = QPushButton('text')
# self.ToolsBTN.move(50, 350)
self.v_box = QVBoxLayout()
self.v_box.addWidget(self.label)
self.v_box.addWidget(self.ToolsBTN)
self.setLayout(self.v_box)
if __name__=='__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
window = video()
window.setWindowTitle('main code')
window.show()
sys.exit(app.exec_())
test2_ui.py
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_Form(object):
def setupUi(self, Form):
Form.setObjectName("Form")
Form.resize(525, 386)
self.horizontalLayout = QtWidgets.QHBoxLayout(Form)
self.horizontalLayout.setObjectName("horizontalLayout")
self.verticalLayout = QtWidgets.QVBoxLayout()
self.verticalLayout.setObjectName("verticalLayout")
self.image_label = QtWidgets.QLabel(Form)
self.image_label.setText("")
self.image_label.setObjectName("image_label")
self.verticalLayout.addWidget(self.image_label)
self.control_bt = QtWidgets.QPushButton(Form)
self.control_bt.setObjectName("control_bt")
self.verticalLayout.addWidget(self.control_bt)
self.capture = QtWidgets.QPushButton(Form)
self.capture.setObjectName("capture")
self.verticalLayout.addWidget(self.capture)
self.horizontalLayout.addLayout(self.verticalLayout)
self.retranslateUi(Form)
QtCore.QMetaObject.connectSlotsByName(Form)
def retranslateUi(self, Form):
_translate = QtCore.QCoreApplication.translate
Form.setWindowTitle(_translate("Form", "Cam view"))
self.control_bt.setText(_translate("Form", "Start"))
self.capture.setText(_translate("Form", "Capture"))
我想在 Python 中使用 PyQt5 构建一个应用程序，但我遇到了一些错误，我尝试解决了很多次，但我不能。
我想先打开一个相机屏幕。在屏幕中，我们将看到我们的网络摄像头屏幕，底部有 2 个按钮（开始和捕获）。当我按下 Start 时，网络摄像头将打开，如果我按下 Capture 按钮，我想拍摄快照。
直到这里我都构建了工作代码。
按下捕获按钮并拍摄快照后，我想更改屏幕以进入第二个屏幕（或清理主屏幕），它只会在中间显示一个基本的 "Hello World" 句子，然后会有底部的按钮。
这是我的代码，我的错在哪里？你能修好吗？
import os
import cv2
import numpy as np
from PyQt5 import QtCore, QtGui, QtWidgets, uic
from PyQt5.QtWidgets import QApplication, QMainWindow, QPushButton, QWidget
class video (QtWidgets.QDialog):
def __init__(self):
super(video, self).__init__()
uic.loadUi('test2.ui',self)
self.control_bt.clicked.connect(self.start_webcam)
self.capture.clicked.connect(self.capture_image)
self.capture.clicked.connect(self.startUIWindow())
self.image_label.setScaledContents(True)
self.capture = None
self.timer = QtCore.QTimer(self, interval=5)
self.timer.timeout.connect(self.update_frame)
self._image_counter = 0
@QtCore.pyqtSlot()
def start_webcam(self):
if self.capture is None:
self.capture =cv2.VideoCapture(0)
self.capture.set(cv2.CAP_PROP_FRAME_HEIGHT, 480)
self.capture.set(cv2.CAP_PROP_FRAME_WIDTH, 640)
self.timer.start()
@QtCore.pyqtSlot()
def update_frame(self):
ret, image=self.capture.read()
simage = cv2.flip(image, 1)
self.displayImage(image, True)
@QtCore.pyqtSlot()
def capture_image(self):
flag, frame= self.capture.read()
path = r'D:\Users\ardad\PycharmProjects\testtest'
if flag:
QtWidgets.QApplication.beep()
name = "my_image.jpg"
cv2.imwrite(os.path.join(path, name), frame)
self._image_counter += 1
def displayImage(self, img, window=True):
qformat = QtGui.QImage.Format_Indexed8
if len(img.shape)==3 :
if img.shape[2]==4:
qformat = QtGui.QImage.Format_RGBA8888
else:
qformat = QtGui.QImage.Format_RGB888
outImage = QtGui.QImage(img, img.shape[1], img.shape[0], img.strides[0], qformat)
outImage = outImage.rgbSwapped()
if window:
self.image_label.setPixmap(QtGui.QPixmap.fromImage(outImage))
def startUIWindow(self):
self.Window = UIWindow(self)
self.setWindowTitle("UIWindow")
self.setCentralWidget(self.Window)
self.show()
class UIWindow(QWidget):
def __init__(self, parent=None):
super(UIWindow, self).__init__(parent)
self.ToolsBTN = QPushButton('text', self)
self.ToolsBTN.move(50, 350)
if __name__=='__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
window = video()
window.setWindowTitle('main code')
window.show()
sys.exit(app.exec_())
我正在添加从 "test2.ui"
转换而来的 .py 文件from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_Form(object):
def setupUi(self, Form):
Form.setObjectName("Form")
Form.resize(525, 386)
self.horizontalLayout = QtWidgets.QHBoxLayout(Form)
self.horizontalLayout.setObjectName("horizontalLayout")
self.verticalLayout = QtWidgets.QVBoxLayout()
self.verticalLayout.setObjectName("verticalLayout")
self.image_label = QtWidgets.QLabel(Form)
self.image_label.setText("")
self.image_label.setObjectName("image_label")
self.verticalLayout.addWidget(self.image_label)
self.control_bt = QtWidgets.QPushButton(Form)
self.control_bt.setObjectName("control_bt")
self.verticalLayout.addWidget(self.control_bt)
self.capture = QtWidgets.QPushButton(Form)
self.capture.setObjectName("capture")
self.verticalLayout.addWidget(self.capture)
self.horizontalLayout.addLayout(self.verticalLayout)
self.retranslateUi(Form)
QtCore.QMetaObject.connectSlotsByName(Form)
def retranslateUi(self, Form):
_translate = QtCore.QCoreApplication.translate
Form.setWindowTitle(_translate("Form", "Cam view"))
self.control_bt.setText(_translate("Form", "Start"))
self.capture.setText(_translate("Form", "Capture"))
当我运行这段代码时，它显示；
AttributeError: 'video' 对象没有属性 'setCentralWidget'
试一试：
main.py
import os
import cv2
import numpy as np
from PyQt5 import QtCore, QtGui, QtWidgets # uic
from PyQt5.QtWidgets import (QApplication, QMainWindow, QPushButton, QWidget,
QLabel, QVBoxLayout) # +++
from test2_ui import Ui_Form # +++
class video (QtWidgets.QDialog, Ui_Form):
def __init__(self):
super().__init__()
# uic.loadUi('test2.ui',self) # ---
self.setupUi(self) # +++
self.control_bt.clicked.connect(self.start_webcam)
self.capture.clicked.connect(self.capture_image)
self.capture.clicked.connect(self.startUIWindow) # - ()
self.image_label.setScaledContents(True)
self.cap = None # -capture <-> +cap
self.timer = QtCore.QTimer(self, interval=5)
self.timer.timeout.connect(self.update_frame)
self._image_counter = 0
@QtCore.pyqtSlot()
def start_webcam(self):
if self.cap is None:
self.cap = cv2.VideoCapture(0)
self.cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 480)
self.cap.set(cv2.CAP_PROP_FRAME_WIDTH, 640)
self.timer.start()
@QtCore.pyqtSlot()
def update_frame(self):
ret, image = self.cap.read()
simage = cv2.flip(image, 1)
self.displayImage(image, True)
@QtCore.pyqtSlot()
def capture_image(self):
flag, frame = self.cap.read()
path = r'D:\_Qt\Test\testtest' #
if flag:
QtWidgets.QApplication.beep()
name = "my_image.jpg"
cv2.imwrite(os.path.join(path, name), frame)
self._image_counter += 1
def displayImage(self, img, window=True):
qformat = QtGui.QImage.Format_Indexed8
if len(img.shape)==3 :
if img.shape[2]==4:
qformat = QtGui.QImage.Format_RGBA8888
else:
qformat = QtGui.QImage.Format_RGB888
outImage = QtGui.QImage(img, img.shape[1], img.shape[0], img.strides[0], qformat)
outImage = outImage.rgbSwapped()
if window:
self.image_label.setPixmap(QtGui.QPixmap.fromImage(outImage))
def startUIWindow(self):
self.Window = UIWindow() # - self
self.setWindowTitle("UIWindow")
# self.setCentralWidget(self.Window)
# self.show()
### +++ vvv
self.Window.ToolsBTN.clicked.connect(self.goWindow1)
self.hide()
self.Window.show()
def goWindow1(self):
self.show()
self.Window.hide()
### +++ ^^^
class UIWindow(QWidget):
def __init__(self, parent=None):
super(UIWindow, self).__init__(parent)
self.resize(300, 300)
self.label = QLabel("Hello World", alignment=QtCore.Qt.AlignCenter)
self.ToolsBTN = QPushButton('text')
# self.ToolsBTN.move(50, 350)
self.v_box = QVBoxLayout()
self.v_box.addWidget(self.label)
self.v_box.addWidget(self.ToolsBTN)
self.setLayout(self.v_box)
if __name__=='__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
window = video()
window.setWindowTitle('main code')
window.show()
sys.exit(app.exec_())
test2_ui.py
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_Form(object):
def setupUi(self, Form):
Form.setObjectName("Form")
Form.resize(525, 386)
self.horizontalLayout = QtWidgets.QHBoxLayout(Form)
self.horizontalLayout.setObjectName("horizontalLayout")
self.verticalLayout = QtWidgets.QVBoxLayout()
self.verticalLayout.setObjectName("verticalLayout")
self.image_label = QtWidgets.QLabel(Form)
self.image_label.setText("")
self.image_label.setObjectName("image_label")
self.verticalLayout.addWidget(self.image_label)
self.control_bt = QtWidgets.QPushButton(Form)
self.control_bt.setObjectName("control_bt")
self.verticalLayout.addWidget(self.control_bt)
self.capture = QtWidgets.QPushButton(Form)
self.capture.setObjectName("capture")
self.verticalLayout.addWidget(self.capture)
self.horizontalLayout.addLayout(self.verticalLayout)
self.retranslateUi(Form)
QtCore.QMetaObject.connectSlotsByName(Form)
def retranslateUi(self, Form):
_translate = QtCore.QCoreApplication.translate
Form.setWindowTitle(_translate("Form", "Cam view"))
self.control_bt.setText(_translate("Form", "Start"))
self.capture.setText(_translate("Form", "Capture"))