pyqt5 使用cv2 显示图片,摄像头的实例

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时间，渐渐带走了年少轻狂，也慢慢沉淀了冷暖自知。成功的道路上，肯定会有失败；对于失败，我们要正确地看待和对待，不怕失败者，则必成功；怕失败者，则一无是处，会更失败。

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

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