Python+Opencv+Qt4编写Windows下摄像头图像采集显示程序

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file '1.ui'

#

# Created: Tue Nov 14 09:45:29 2017

#      by: PyQt4 UI code generator 4.11.3

#

# WARNING! All changes made in this file will be lost!

# -*- coding: cp936 -*-

import cv2

import numpy as np

from PyQt4 import QtCore, QtGui

from PyQt4.QtGui import *  

from PyQt4.QtCore import *

from PyQt4 import phonon

from PyQt4.QtSql import *

import sys

try:

    _fromUtf8 = QtCore.QString.fromUtf8

except AttributeError:

    def _fromUtf8(s):

        return s

try:

    _encoding = QtGui.QApplication.UnicodeUTF8

    def _translate(context, text, disambig):

        return QtGui.QApplication.translate(context, text, disambig, _encoding)

except AttributeError:

    def _translate(context, text, disambig):

        return QtGui.QApplication.translate(context, text, disambig)

class Ui_Dialog(object):

    def setupUi(self, Dialog):

        Dialog.setObjectName(_fromUtf8("Dialog"))

        Dialog.resize(760, 439)

        self.pushButton = QtGui.QPushButton(Dialog)

        self.pushButton.setGeometry(QtCore.QRect(130, 390, 75, 23))

        self.pushButton.setObjectName(_fromUtf8("打开"))

        self.pushButton_2 = QtGui.QPushButton(Dialog)

        self.pushButton_2.setGeometry(QtCore.QRect(570, 390, 75, 23))

        self.pushButton_2.setObjectName(_fromUtf8("关闭"))

        self.label = QtGui.QLabel(Dialog)

        self.label.setGeometry(QtCore.QRect(10, 31, 391, 311))

        self.label.setText(_fromUtf8(""))

        #self.label.setPixmap(QtGui.QPixmap(_fromUtf8("D:/用户目录/我的图片/15.bmp")))

        self.label.setObjectName(_fromUtf8("label"))

        self.label_2 = QtGui.QLabel(Dialog)

        self.label_2.setGeometry(QtCore.QRect(570, 170, 54, 12))

        self.label_2.setObjectName(_fromUtf8("label_2"))

        self.retranslateUi(Dialog)

        QtCore.QMetaObject.connectSlotsByName(Dialog)

    def retranslateUi(self, Dialog):

        Dialog.setWindowTitle(_translate("Dialog", "Dialog", None))

        self.pushButton.setText(_translate("Dialog", "打开", None))

        self.pushButton_2.setText(_translate("Dialog", "关闭", None))

        self.label.setText(_translate("Dialog", "视频", None))

        self.label_2.setText(_translate("Dialog", "截图", None))

        

        self.pushButton.clicked.connect(self.open_camer)

        self.pushButton_2.clicked.connect(self.take_picture)

    def open_camer(self):

        global cap,timer

        cap = cv2.VideoCapture(0)

815f

        timer.start(100)

        #fourcc = cv2.cv.CV_FOURCC(*'XVID')

        #opencv3的话用:fourcc = cv2.VideoWriter_fourcc(*'XVID')

        #out = cv2.VideoWriter('output.avi',fourcc,20.0,(640,480))#保存视频

        '''

        while True:

            ret,frame = cap.read()

            gray = cv2.cvtColor(frame,cv2.COLOR_BGR2GRAY)

            out.write(frame)#写入视频

            cv2.imshow('frame',frame)#一个窗口用以显示原视频

            cv2.imshow('gray',gray)#另一窗口显示处理视频

            if cv2.waitKey(1) &0xFF == ord('q'):

                break

        cap.release()

        out.release()

        cv2.destroyAllWindows()

        '''

    def take_picture(self):

        global timer

        timer.stop()

        

class Dialog(QtGui.QDialog):

    def __init__(self,parent=None):

        global timer

        QtGui.QWidget.__init__(self,parent)

        self.ui=Ui_Dialog()                                         # Ui_Dialog为.ui产生.py文件中窗体类名，经测试类名以Ui_为前缀，加上UI窗体对象名（此处为Dialog，见上图）

        self.ui.setupUi(self)

        timer = QTimer(self)

        self.connect(timer, SIGNAL("timeout()"), self.updtTime)

    def updtTime(self):

        global cap

        #cap = cv2.VideoCapture(0)

        ret,frame = cap.read()

        cv2.imwrite('1.jpg', frame)

        #out.write(frame)

        self.ui.label.setPixmap(QtGui.QPixmap(_fromUtf8('1.jpg')))

if __name__ == "__main__":

    

    app = QtGui.QApplication(sys.argv)

    myapp=Dialog()

    myapp.show()

    app.exec_()

    pass