我想通过使用网络摄像头将捕获的图像添加到我的PyQt gui窗口中，并且网络摄像头图像将出现在gui窗口中 [英] I wanted to add capturing image by using webcam to my PyQt gui window and webcam image will come on gui window

问题描述

我想将摄像头图像添加到我的主GUI窗口，该图像将发送到电子邮件ID.如果这不可行，我也想保存该图像，并且该保存的图像将发送到我的电子邮件ID，并在倒数3,2,1时，微笑将通过网络摄像头单击该图像. 这是我的代码:

I wanted to add the webcam image to my main GUI window and that image will send to the email id. If this is not Possible, I also want to save that image and that saved image will send to my email id and On the countdown to 3,2,1, smile it will click the image by webcam. Here, is my code:

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_()

推荐答案

首先，如果要在PyQt中显示opencv的图像，则无需在PyQt中使用cv2.imshow()，因为它会阻塞python事件循环.您必须将其转换为QImage或QPixmap，下一类实现opencv的数据获取，它允许获取QImage，但必须在线程中执行.

First of all you do not have to use cv2.imshow() inside PyQt since it blocks the python event loop, if you want to show the image of opencv in PyQt you have to convert it to QImage or QPixmap, the next class implements the data acquisition of opencv and it allows to obtain the QImage but it must be executed in a thread.

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)

通过以上内容，我们可以在QLabel中显示摄像机，另一方面，我们必须将QImage转换为字节，因为我们将QByteArray与QBuffer一起使用.出现的另一个问题是，电子邮件的发送需要花费一些时间，因此GUI可以被阻止，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.

With the above we can show the camera in a QLabel, on the other hand we must convert the QImage to bytes for it we use QByteArray with QBuffer. Another problem that arises is that the sending of email takes a while so the GUI can be blocked so it must be executed in a thread. And finally I added a QDialog where you must enter the mail data.

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_())

这篇关于我想通过使用网络摄像头将捕获的图像添加到我的PyQt gui窗口中，并且网络摄像头图像将出现在gui窗口中的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！