pyqt5 使用cv2 显示图片，摄像头

#! /usr/bin/python3
# coding = utf-8
# from PyQt5 import QtGui,QtCore,Qt
import sys
from PyQt5.QtCoreimport Qt,pyqtSignal,QSize,QRect,QMetaObject,QCoreApplication,pyqtSlot,QPropertyAnimation,QThread
from PyQt5.QtGuiimport QIcon,QFont, QPixmap, QPainter,QImage
from PyQt5.QtWidgetsimport QMainWindow,QApplication

import cv2
from gevent.libev.corecextimport 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