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Commitac17d61

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添加拓展挑战1内容 2018年1月28日
1 parentf95b433 commitac17d61

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5 files changed

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5 files changed

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# ex2tron's blog:
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# http://ex2tron.wang
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importsys
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fromPyQt5.QtWidgetsimportQApplication,QWidget
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if__name__=='__main__':
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app=QApplication(sys.argv)
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window=QWidget()
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window.setWindowTitle('Hello World!')
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window.show()
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sys.exit(app.exec_())
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# ex2tron's blog:
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# http://ex2tron.wang
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importsys
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importcv2
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fromPyQt5importQtCore,QtGui,QtWidgets
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fromPyQt5.QtCoreimport*
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fromPyQt5.QtGuiimport*
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fromPyQt5.QtWidgetsimportQFileDialog,QMainWindow
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frommainFormimportUi_MainWindow
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classPyQtMainEntry(QMainWindow,Ui_MainWindow):
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def__init__(self):
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super().__init__()
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self.setupUi(self)
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self.camera=cv2.VideoCapture(0)
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self.is_camera_opened=False# 摄像头有没有打开标记
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# 定时器：30ms捕获一帧
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self._timer=QtCore.QTimer(self)
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self._timer.timeout.connect(self._queryFrame)
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self._timer.setInterval(30)
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defbtnOpenCamera_Clicked(self):
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'''
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打开和关闭摄像头
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'''
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self.is_camera_opened=~self.is_camera_opened
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ifself.is_camera_opened:
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self.btnOpenCamera.setText("关闭摄像头")
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self._timer.start()
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else:
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self.btnOpenCamera.setText("打开摄像头")
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self._timer.stop()
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defbtnCapture_Clicked(self):
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'''
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捕获图片
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'''
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# 摄像头未打开，不执行任何操作
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ifnotself.is_camera_opened:
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return
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self.captured=self.frame
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# 后面这几行代码几乎都一样，可以尝试封装成一个函数
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rows,cols,channels=self.captured.shape
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bytesPerLine=channels*cols
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# Qt显示图片时，需要先转换成QImgage类型
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QImg=QImage(self.captured.data,cols,rows,
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bytesPerLine,QImage.Format_RGB888)
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self.labelCapture.setPixmap(QPixmap.fromImage(QImg).scaled(
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self.labelCapture.size(),Qt.KeepAspectRatio,Qt.SmoothTransformation))
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defbtnReadImage_Clicked(self):
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'''
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从本地读取图片
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'''
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# 打开文件选取对话框
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filename,_=QFileDialog.getOpenFileName(self,'打开图片')
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iffilename:
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self.captured=cv2.imread(str(filename))
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# OpenCV图像以BGR通道存储，显示时需要从BGR转到RGB
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self.captured=cv2.cvtColor(self.captured,cv2.COLOR_BGR2RGB)
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rows,cols,channels=self.captured.shape
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bytesPerLine=channels*cols
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QImg=QImage(self.captured.data,cols,rows,
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bytesPerLine,QImage.Format_RGB888)
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self.labelCapture.setPixmap(QPixmap.fromImage(QImg).scaled(
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self.labelCapture.size(),Qt.KeepAspectRatio,Qt.SmoothTransformation))
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defbtnGray_Clicked(self):
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'''
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灰度化
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'''
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# 如果没有捕获图片，则不执行操作
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ifnothasattr(self,"captured"):
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return
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self.cpatured=cv2.cvtColor(self.captured,cv2.COLOR_RGB2GRAY)
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rows,columns=self.cpatured.shape
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bytesPerLine=columns
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# 灰度图是单通道，所以需要用Format_Indexed8
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QImg=QImage(self.cpatured.data,columns,rows,
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bytesPerLine,QImage.Format_Indexed8)
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self.labelResult.setPixmap(QPixmap.fromImage(QImg).scaled(
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self.labelResult.size(),Qt.KeepAspectRatio,Qt.SmoothTransformation))
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defbtnThreshold_Clicked(self):
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'''
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Otsu自动阈值分割
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'''
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ifnothasattr(self,"captured"):
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return
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_,self.cpatured=cv2.threshold(
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self.cpatured,0,255,cv2.THRESH_BINARY+cv2.THRESH_OTSU)
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rows,columns=self.cpatured.shape
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bytesPerLine=columns
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# 阈值分割图也是单通道，也需要用Format_Indexed8
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QImg=QImage(self.cpatured.data,columns,rows,
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bytesPerLine,QImage.Format_Indexed8)
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self.labelResult.setPixmap(QPixmap.fromImage(QImg).scaled(
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self.labelResult.size(),Qt.KeepAspectRatio,Qt.SmoothTransformation))
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@QtCore.pyqtSlot()
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def_queryFrame(self):
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'''
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循环捕获图片
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'''
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ret,self.frame=self.camera.read()
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img_rows,img_cols,channels=self.frame.shape
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bytesPerLine=channels*img_cols
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cv2.cvtColor(self.frame,cv2.COLOR_BGR2RGB,self.frame)
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QImg=QImage(self.frame.data,img_cols,img_rows,
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bytesPerLine,QImage.Format_RGB888)
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self.labelCamera.setPixmap(QPixmap.fromImage(QImg).scaled(
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self.labelCamera.size(),Qt.KeepAspectRatio,Qt.SmoothTransformation))
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if__name__=="__main__":
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app=QtWidgets.QApplication(sys.argv)
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window=PyQtMainEntry()
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window.show()
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sys.exit(app.exec_())
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# -*- coding: utf-8 -*-
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# Form implementation generated from reading ui file 'using_pyqt_create_ui.ui'
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#
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# Created by: PyQt5 UI code generator 5.11.3
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#
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# WARNING! All changes made in this file will be lost!
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fromPyQt5importQtCore,QtGui,QtWidgets
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classUi_MainWindow(object):
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defsetupUi(self,MainWindow):
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MainWindow.setObjectName("MainWindow")
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MainWindow.resize(610,292)
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self.centralwidget=QtWidgets.QWidget(MainWindow)
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self.centralwidget.setObjectName("centralwidget")
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self.btnOpenCamera=QtWidgets.QPushButton(self.centralwidget)
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self.btnOpenCamera.setGeometry(QtCore.QRect(20,220,75,23))
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self.btnOpenCamera.setObjectName("btnOpenCamera")
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self.labelCamera=QtWidgets.QLabel(self.centralwidget)
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self.labelCamera.setGeometry(QtCore.QRect(30,40,150,150))
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self.labelCamera.setObjectName("labelCamera")
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self.labelCapture=QtWidgets.QLabel(self.centralwidget)
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self.labelCapture.setGeometry(QtCore.QRect(230,40,150,150))
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self.labelCapture.setObjectName("labelCapture")
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self.labelResult=QtWidgets.QLabel(self.centralwidget)
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self.labelResult.setGeometry(QtCore.QRect(430,40,150,150))
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self.labelResult.setObjectName("labelResult")
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self.btnCapture=QtWidgets.QPushButton(self.centralwidget)
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self.btnCapture.setGeometry(QtCore.QRect(120,220,75,23))
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self.btnCapture.setObjectName("btnCapture")
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self.btnReadImage=QtWidgets.QPushButton(self.centralwidget)
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self.btnReadImage.setGeometry(QtCore.QRect(220,220,75,23))
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self.btnReadImage.setObjectName("btnReadImage")
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self.btnGray=QtWidgets.QPushButton(self.centralwidget)
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self.btnGray.setGeometry(QtCore.QRect(320,220,75,23))
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self.btnGray.setObjectName("btnGray")
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self.btnThreshold=QtWidgets.QPushButton(self.centralwidget)
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self.btnThreshold.setGeometry(QtCore.QRect(420,220,101,23))
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self.btnThreshold.setObjectName("btnThreshold")
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MainWindow.setCentralWidget(self.centralwidget)
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self.menubar=QtWidgets.QMenuBar(MainWindow)
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self.menubar.setGeometry(QtCore.QRect(0,0,610,22))
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self.menubar.setObjectName("menubar")
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MainWindow.setMenuBar(self.menubar)
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self.statusbar=QtWidgets.QStatusBar(MainWindow)
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self.statusbar.setObjectName("statusbar")
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MainWindow.setStatusBar(self.statusbar)
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self.retranslateUi(MainWindow)
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self.btnCapture.clicked.connect(MainWindow.btnCapture_Clicked)
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self.btnReadImage.clicked.connect(MainWindow.btnReadImage_Clicked)
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self.btnGray.clicked.connect(MainWindow.btnGray_Clicked)
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self.btnThreshold.clicked.connect(MainWindow.btnThreshold_Clicked)
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self.btnOpenCamera.clicked.connect(MainWindow.btnOpenCamera_Clicked)
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QtCore.QMetaObject.connectSlotsByName(MainWindow)
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defretranslateUi(self,MainWindow):
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_translate=QtCore.QCoreApplication.translate
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MainWindow.setWindowTitle(_translate("MainWindow","MainWindow"))
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self.btnOpenCamera.setText(_translate("MainWindow","打开摄像头"))
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self.labelCamera.setText(_translate("MainWindow","摄像头"))
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self.labelCapture.setText(_translate("MainWindow","捕获图"))
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self.labelResult.setText(_translate("MainWindow","结果图"))
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self.btnCapture.setText(_translate("MainWindow","捕获图片"))
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self.btnReadImage.setText(_translate("MainWindow","打开图片"))
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self.btnGray.setText(_translate("MainWindow","灰度化"))
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self.btnThreshold.setText(_translate("MainWindow","阈值分割(Otsu)"))
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