pyqt5 使用cv2 显示图片,摄像头的实例
本文向大家介绍pyqt5 使用cv2 显示图片,摄像头的实例,包括了pyqt5 使用cv2 显示图片,摄像头的实例的使用技巧和注意事项,需要的朋友参考一下
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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