pyqt5 使用cv2 显示图片,摄像头的实例_Python

pyqt5 使用cv2 显示图片,摄像头的实例

2021-07-25 00:34ShellCollector Python

今天小编就为大家分享一篇pyqt5 使用cv2 显示图片,摄像头的实例，具有很好的参考价值，希望对大家有所帮助。一起跟随小编过来看看吧

如下所示：

				?

									#! /usr/bin/python3

									# coding = utf-8

									# from PyQt5 import QtGui,QtCore,Qt

									import sys

									from PyQt5.QtCore import Qt,pyqtSignal,QSize,QRect,QMetaObject, QCoreApplication, pyqtSlot,QPropertyAnimation,QThread

									from PyQt5.QtGui import QIcon, QFont, QPixmap, QPainter, QImage

									from PyQt5.QtWidgets import QMainWindow, QApplication

									import cv2

									from gevent.libev.corecext import SIGNAL, time

									from qtpy importQtCore

									class mycsms(QMainWindow):

									    def __init__(self):

									        super(mycsms, self).__init__()

									        self.setupUi(self)

									        self.image= QImage()

									        self.device= cv2.VideoCapture(0)

									        self.playTimer= Timer("updatePlay()")

									        self.connect(self.playTimer, SIGNAL("updatePlay()"), self.showCamer)

									    # 读摄像头

									    def showCamer(self):

									        if self.device.isOpened():

									            ret, frame= self.device.read()

									        else:

									            ret = False

									        # 读写磁盘方式

									        # cv2.imwrite("2.png",frame)

									        #self.image.load("2.png")

									        height, width, bytesPerComponent= frame.shape

									        bytesPerLine = bytesPerComponent* width

									        # 变换彩色空间顺序

									        cv2.cvtColor(frame, cv2.COLOR_BGR2RGB,frame)

									        # 转为QImage对象

									        self.image= QImage(frame.data, width, height, bytesPerLine, QImage.Format_RGB888)

									        self.view.setPixmap(QPixmap.fromImage(self.image))

									if __name__ == "__main__":

									    app = QApplication(sys.argv)

									    myshow = mycsms()

									    myshow.playTimer.start()

									    myshow.show()

									    sys.exit(app.exec_())

									# 线程类：

									class Timer(QtCore.QThread):

									    def __init__(self, signal="updateTime()", parent=None):

									        super(Timer, self).__init__(parent)

									        self.stoped= False

									        self.signal= signal

									        self.mutex= QtCore.QMutex()

									    def run(self):

									        with QtCore.QMutexLocker(self.mutex):

									            self.stoped= False

									        while True:

									            if self.stoped:

									                return

									            self.emit(QtCore.SIGNAL(self.signal))

									            #40毫秒发送一次信号

									            time.sleep(0.04)

									    def stop(self):

									        with QtCore.QMutexLocker(self.mutex):

									            self.stoped= True

									    def isStoped(self):

									        with QtCore.QMutexLocker(self.mutex):

									            return self.stoped