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.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

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