我想将网络摄像头图像添加到我的主 GUI 窗口中，该图像将发送到电子邮件 ID。如果这是不可能的，我还想保存该图像，并且保存的图像将发送到我的电子邮件ID，并且在倒计时到3,2,1时，微笑它将通过网络摄像头单击图像。 这是我的代码：
import sys
from PyQt5 import QtCore
from PyQt5 import QtWidgets, QtGui
import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
from email.mime.base import MIMEBase
from email import encoders
import cv2, time
DURATION_INT = 5
class MyMainWindow(QtWidgets.QMainWindow):
def __init__(self):
super().__init__()
self.time_left_int = DURATION_INT
self.widget_counter_int = 0
central_widget = QtWidgets.QWidget()
self.setCentralWidget(central_widget)
vbox = QtWidgets.QVBoxLayout()
central_widget.setLayout(vbox)
self.pages_qsw = QtWidgets.QStackedWidget()
vbox.addWidget(self.pages_qsw)
self.time_passed_qll = QtWidgets.QLabel()
vbox.addWidget(self.time_passed_qll)
self.pushButton = QtWidgets.QPushButton()
self.pushButton.setText("Push to start")
self.yesbutton = QtWidgets.QToolButton()
self.yesbutton.setText("yes")
self.Nobutton = QtWidgets.QToolButton()
self.Nobutton.setText("No")
self.imageframe = QtWidgets.QLabel()
self.imageframe.setText("fghkfhh")
vbox.addWidget(self.Nobutton)
vbox.addWidget(self.yesbutton)
vbox.addWidget(self.pushButton)
vbox.addWidget(self.imageframe)
self.pushButton.clicked.connect(self.timer_start)
self.yesbutton.clicked.connect(self.capturing_image)
self.update_gui()
def gmail_alert(self):
email_user = 'user email_id'
email_send = 'receiver email_id'
subject = 'Alert system'
msg = MIMEMultipart()
msg['From'] = email_user
msg['To'] = email_send
msg['Subject'] = subject
msg.preamble = "test"
body = 'Hi there, sending this email from Python!'
msg.attach(MIMEText(body, 'plain'))
filename = 'alert.png'
attachment = open(filename, 'rb')
part = MIMEBase('application', 'octet-stream')
part.set_payload((attachment).read())
encoders.encode_base64(part)
part.add_header('Content-Disposition', "attachment;
filename= " + filename)
msg.attach(part)
text = msg.as_string()
server = smtplib.SMTP('smtp.gmail.com', 587)
server.starttls()
server.login(email_user, 'user email_id password')
server.sendmail(email_user, email_send, text)
server.quit()
def timer_start(self):
self.time_left_int = DURATION_INT
self.my_qtimer = QtCore.QTimer(self)
self.my_qtimer.timeout.connect(self.timer_timeout)
self.my_qtimer.start(1000)
self.update_gui()
def timer_timeout(self):
if self.time_left_int > 0:
self.time_left_int -= 1
else:
self.gmail_alert()
self.update_gui()
def update_gui(self):
self.time_passed_qll.setText((str(self.time_left_int) if self.time_left_int >=1 else "Smile..!"))
def capturing_image(self):
video =cv2.VideoCapture(0)
check, frame = video.read()
print(check)
print(frame)
cv2.imshow("capturing", frame)
video.release()
app = QtWidgets.QApplication(sys.argv)
main_window = MyMainWindow()
main_window.show()
sys.exit(app.exec_()
首先，您不必在 PyQt中使用cv2.imshow()，因为它会阻塞 python 事件循环，如果您想在 PyQt 中显示 opencv 的图像，您必须将其转换为 QImage 或 QPixmap，下一个类实现 opencv 的数据采集，它允许获取 QImage，但它必须在线程中执行。
OpencvQt.py
import cv2
import numpy as np
from PyQt5 import QtCore, QtGui, QtWidgets
class Capture(QtCore.QObject):
started = QtCore.pyqtSignal()
frameReady = QtCore.pyqtSignal(np.ndarray)
def __init__(self, parent=None):
super(Capture, self).__init__(parent)
self._frame = None
self.m_timer = QtCore.QBasicTimer()
self.m_videoCapture = cv2.VideoCapture()
@QtCore.pyqtSlot()
def start(self, cam=0):
if self.m_videoCapture is not None:
self.m_videoCapture.release()
self.m_videoCapture = cv2.VideoCapture(cam)
if self.m_videoCapture.isOpened():
self.m_timer.start(0, self)
self.started.emit()
@QtCore.pyqtSlot()
def stop(self):
self.m_timer.stop()
def __del__(self):
self.m_videoCapture.release()
def frame(self):
return self.m_frame
def timerEvent(self, event):
if event.timerId() != self.m_timer.timerId():
return
ret, val = self.m_videoCapture.read()
if not ret:
self.m_timer.stop()
return
self.m_frame = val
self.frameReady.emit(self.m_frame)
frame = QtCore.pyqtProperty(np.ndarray, fget=frame, notify=frameReady, user=True)
class Converter(QtCore.QObject):
imageReady = QtCore.pyqtSignal(QtGui.QImage)
def __init__(self, parent=None):
super(Converter, self).__init__(parent)
self.m_frame = np.array([])
self.m_timer = QtCore.QBasicTimer()
self.m_processAll = True
self.m_image = QtGui.QImage()
def queue(self, frame):
self.m_frame = frame
if not self.m_timer.isActive():
self.m_timer.start(0, self)
def process(self, frame):
w, h, _ = frame.shape
rgbImage = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
self.m_image = QtGui.QImage(rgbImage.data, h, w, QtGui.QImage.Format_RGB888)
self.imageReady.emit(QtGui.QImage(self.m_image))
def timerEvent(self, event):
if event.timerId() != self.m_timer.timerId():
return
self.process(self.m_frame)
self.m_timer.stop()
def processAll(self):
return self.m_processAll
def setProcessAll(self, _all):
self.m_processAll = _all
def processFrame(self, frame):
if self.m_processAll:
self.process(frame)
else:
self.queue(frame)
def image(self):
return self.m_image
image = QtCore.pyqtProperty(QtGui.QImage, fget=image, notify=imageReady, user=True)
processAll = QtCore.pyqtProperty(bool, fget=processAll, fset=setProcessAll)
有了上面，我们可以在QLabel中显示相机，另一方面，我们必须将QImage转换为字节，以便我们使用QByteArray和QBuffer。出现的另一个问题是发送电子邮件需要一段时间，因此可以阻止 GUI，因此必须在线程中执行。最后，我添加了一个QDialog，您必须在其中输入邮件数据。
main.py
import sys
import threading
from PyQt5 import QtCore, QtGui, QtWidgets
import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
from email.mime.base import MIMEBase
from email import encoders
from OpencvQt import Capture, Converter
config = {
"DURATION_INT": 5
}
def send_email(user, pwd, recipient, subject, body, image_payload):
msg = MIMEMultipart()
msg['From'] = user
msg['To'] = recipient
msg['Subject'] = subject
msg.attach(MIMEText(body, 'plain'))
part = MIMEBase('application', 'octet-stream')
part.set_payload(image_payload)
encoders.encode_base64(part)
filename = QtCore.QDateTime.currentDateTime().toString()+ '.png'
part.add_header('Content-Disposition', "attachment; filename= " + filename)
msg.attach(part)
text = msg.as_string()
server = smtplib.SMTP('smtp.gmail.com', 587)
server.starttls()
server.login(user, pwd)
server.sendmail(user, recipient, text)
server.quit()
class MainWindow(QtWidgets.QMainWindow):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
central_widget = QtWidgets.QWidget()
self.setCentralWidget(central_widget)
lay = QtWidgets.QVBoxLayout(central_widget)
self.view = QtWidgets.QLabel()
self.btn_start = QtWidgets.QPushButton("Start")
self.btn_stop = QtWidgets.QPushButton("Stop")
self.btn_send = QtWidgets.QPushButton("Send Email")
self.label_time = QtWidgets.QLabel()
lay.addWidget(self.view, alignment=QtCore.Qt.AlignCenter)
lay.addWidget(self.btn_start)
lay.addWidget(self.btn_stop)
lay.addWidget(self.btn_send)
lay.addWidget(self.label_time, alignment=QtCore.Qt.AlignCenter)
self.view.setFixedSize(640, 400)
self.show()
self.init_camera()
self.init_email()
def init_camera(self):
self.capture = Capture()
self.converter = Converter()
captureThread = QtCore.QThread(self)
converterThread = QtCore.QThread(self)
self.converter.setProcessAll(False)
captureThread.start()
converterThread.start()
self.capture.moveToThread(captureThread)
self.converter.moveToThread(converterThread)
self.capture.frameReady.connect(self.converter.processFrame)
self.converter.imageReady.connect(self.setImage)
self.capture.started.connect(lambda: print("started"))
self.btn_start.clicked.connect(self.capture.start)
self.btn_stop.clicked.connect(self.capture.stop)
@QtCore.pyqtSlot(QtGui.QImage)
def setImage(self, image):
self.view.setPixmap(QtGui.QPixmap.fromImage(image))
def init_email(self):
timeline = QtCore.QTimeLine(config["DURATION_INT"]*1000, self)
timeline.frameChanged.connect(self.onFrameChanged)
timeline.setFrameRange(0, config["DURATION_INT"])
timeline.setDirection(QtCore.QTimeLine.Backward)
self.btn_send.clicked.connect(timeline.start)
d = EmailDialog(self)
if d.exec_() == EmailDialog.Accepted:
self._info = d.get_data()
def onFrameChanged(self, frame):
if frame !=0:
self.label_time.setNum(frame)
else:
self.label_time.setText("Smile...!")
QtWidgets.QApplication.beep()
image = QtGui.QImage(self.converter.image)
ba = QtCore.QByteArray()
buff = QtCore.QBuffer(ba)
image.save(buff, "PNG")
th = threading.Thread(target=send_email, args=(*self._info, ba))
th.start()
def closeEvent(self, event):
self.capture.stop()
super(MainWindow, self).closeEvent(event)
class EmailDialog(QtWidgets.QDialog):
def __init__(self, parent=None):
super(EmailDialog, self).__init__(parent)
lay = QtWidgets.QFormLayout(self)
self.from_le = QtWidgets.QLineEdit()
self.pass_le = QtWidgets.QLineEdit(echoMode=QtWidgets.QLineEdit.Password)
self.to_le = QtWidgets.QLineEdit()
self.subject_le = QtWidgets.QLineEdit()
self.body_te = QtWidgets.QTextEdit()
self.buttonBox = QtWidgets.QDialogButtonBox()
self.buttonBox.setStandardButtons(QtWidgets.QDialogButtonBox.Cancel|QtWidgets.QDialogButtonBox.Ok)
self.buttonBox.accepted.connect(self.accept)
self.buttonBox.rejected.connect(self.reject)
lay.addRow("From: ", self.from_le)
lay.addRow("Password: ", self.pass_le)
lay.addRow("To: ", self.to_le)
lay.addRow("Subject: ", self.subject_le)
lay.addRow("Body: ", self.body_te)
lay.addRow(self.buttonBox)
self.from_le.textChanged.connect(self.enable_button)
self.pass_le.textChanged.connect(self.enable_button)
self.to_le.textChanged.connect(self.enable_button)
self.enable_button()
def enable_button(self):
disabled = self.from_le.text() == "" or self.pass_le.text() == "" or self.to_le.text() == ""
self.buttonBox.setDisabled(disabled)
def get_data(self):
return self.from_le.text(), self.pass_le.text(), self.to_le.text(), self.subject_le.text(), self.body_te.toPlainText()
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
w = MainWindow()
sys.exit(app.exec_())