利用opencv打开摄像头,将视频画面显示到QLabel中,通过调整滑动条可以改变摄像头的参数:亮度、对比度、饱和度、曝光度、色调
main.py
import sys from PyQt5 import QtGui, QtWidgets, QtCore from PyQt5.QtCore import * from PyQt5.QtGui import * from PyQt5.QtWidgets import QMainWindow,QApplication # from PyQt5.QtWebEngineWidgets import * from Ui_untitled import Ui_MainWindow import cv2 #引入CV库 import os class MyWindow(QtWidgets.QMainWindow, Ui_MainWindow): #start = pyqtSignal() #发送代理配置 def __init__(self, parent=None): super(MyWindow, self).__init__(parent) self.setupUi(self) self.cap = cv2.VideoCapture(0) self.cap.set(6,cv2.VideoWriter.fourcc('M','J','P','G')) self.cap.set(cv2.CAP_PROP_FRAME_WIDTH,1920) # 宽度 self.cap.set(cv2.CAP_PROP_FRAME_HEIGHT,1080) # 高度 def closeEvent(self, event): self.cap.release() event.accept() # 表示同意了,结束吧 os._exit(0) # 至此,程序结束,摄像头设备也释放了,安全关闭程序 #从摄像头读视频帧 def setPic(self): fps = 30 while True: ret,frame = self.cap.read() QtImg = self.cvImgtoQtImg(frame) #将帧数据转换为PyQt图像格式 self.label_pic.setPixmap(QtGui.QPixmap.fromImage(QtImg)) #在ImgDisp显示图像 size = QtImg.size() self.label_pic.resize(size)#根据帧大小调整标签大小 self.label_pic.show() #刷新界面 cv2.waitKey(int(1000/fps)) #休眠一会,确保每秒播放fps帧 # 完成所有操作后,释放捕获器 self.cap.release() def setLD(self,value): print(value) self.cap.set(cv2.CAP_PROP_BRIGHTNESS,value) # 亮度 def setDB(self,value): print(value) self.cap.set(cv2.CAP_PROP_CONTRAST,value) # 对比度 def setBH(self,value): print(value) self.cap.set(cv2.CAP_PROP_SATURATION,value) # 饱和度 def setBG(self,value): print(value) self.cap.set(cv2.CAP_PROP_EXPOSURE,value) # 曝光 def setSD(self,value): print(value) self.cap.set(cv2.CAP_PROP_HUE,value) # 色调 def cvImgtoQtImg(self,cvImg): #定义opencv图像转PyQt图像的函数 QtImgBuf = cv2.cvtColor(cvImg, cv2.COLOR_BGR2BGRA) QtImg = QtGui.QImage(QtImgBuf.data, QtImgBuf.shape[1], QtImgBuf.shape[0], QtGui.QImage.Format_RGB32) return QtImg def __main(): app = QApplication(sys.argv) mw = MyWindow() #视图对象 mw.setStyleSheet("#MainWindow{background-color: rgb(91, 91, 91);}") #mw.setStyleSheet("#MainWindow{background-color: #BA55D3;}") mw.verticalSlider_ld.valueChanged.connect(mw.setLD) mw.verticalSlider_db.valueChanged.connect(mw.setDB) mw.verticalSlider_bh.valueChanged.connect(mw.setBH) mw.verticalSlider_bg.valueChanged.connect(mw.setBG) mw.verticalSlider_sd.valueChanged.connect(mw.setSD) mw.show() mw.setPic() sys.exit(app.exec_()) if __name__=='__main__': __main()
Ui_untitled.py
# -*- coding: utf-8 -*- # Form implementation generated from reading ui file 'd:All_workspacevscode_procvuntitled.ui' # # Created by: PyQt5 UI code generator 5.15.6 # # WARNING: Any manual changes made to this file will be lost when pyuic5 is # run again. Do not edit this file unless you know what you are doing. from PyQt5 import QtCore, QtGui, QtWidgets class Ui_MainWindow(object): def setupUi(self, MainWindow): MainWindow.setObjectName("MainWindow") MainWindow.resize(1019, 714) self.centralwidget = QtWidgets.QWidget(MainWindow) self.centralwidget.setObjectName("centralwidget") self.horizontalLayout_2 = QtWidgets.QHBoxLayout(self.centralwidget) self.horizontalLayout_2.setObjectName("horizontalLayout_2") self.label_pic = QtWidgets.QLabel(self.centralwidget) self.label_pic.setObjectName("label_pic") self.horizontalLayout_2.addWidget(self.label_pic) self.horizontalLayout = QtWidgets.QHBoxLayout() self.horizontalLayout.setObjectName("horizontalLayout") self.verticalLayout = QtWidgets.QVBoxLayout() self.verticalLayout.setObjectName("verticalLayout") self.label = QtWidgets.QLabel(self.centralwidget) font = QtGui.QFont() font.setFamily("宋体") font.setPointSize(20) self.label.setFont(font) self.label.setObjectName("label") self.verticalLayout.addWidget(self.label) self.verticalSlider_ld = QtWidgets.QSlider(self.centralwidget) self.verticalSlider_ld.setOrientation(QtCore.Qt.Vertical) self.verticalSlider_ld.setObjectName("verticalSlider_ld") self.verticalLayout.addWidget(self.verticalSlider_ld) self.horizontalLayout.addLayout(self.verticalLayout) self.verticalLayout_2 = QtWidgets.QVBoxLayout() self.verticalLayout_2.setObjectName("verticalLayout_2") self.label_2 = QtWidgets.QLabel(self.centralwidget) font = QtGui.QFont() font.setFamily("宋体") font.setPointSize(20) self.label_2.setFont(font) self.label_2.setObjectName("label_2") self.verticalLayout_2.addWidget(self.label_2) self.verticalSlider_db = QtWidgets.QSlider(self.centralwidget) self.verticalSlider_db.setOrientation(QtCore.Qt.Vertical) self.verticalSlider_db.setObjectName("verticalSlider_db") self.verticalLayout_2.addWidget(self.verticalSlider_db) self.horizontalLayout.addLayout(self.verticalLayout_2) self.verticalLayout_3 = QtWidgets.QVBoxLayout() self.verticalLayout_3.setObjectName("verticalLayout_3") self.label_3 = QtWidgets.QLabel(self.centralwidget) font = QtGui.QFont() font.setFamily("宋体") font.setPointSize(20) self.label_3.setFont(font) self.label_3.setObjectName("label_3") self.verticalLayout_3.addWidget(self.label_3) self.verticalSlider_bh = QtWidgets.QSlider(self.centralwidget) self.verticalSlider_bh.setOrientation(QtCore.Qt.Vertical) self.verticalSlider_bh.setObjectName("verticalSlider_bh") self.verticalLayout_3.addWidget(self.verticalSlider_bh) self.horizontalLayout.addLayout(self.verticalLayout_3) self.verticalLayout_4 = QtWidgets.QVBoxLayout() self.verticalLayout_4.setObjectName("verticalLayout_4") self.label_4 = QtWidgets.QLabel(self.centralwidget) font = QtGui.QFont() font.setFamily("宋体") font.setPointSize(20) self.label_4.setFont(font) self.label_4.setObjectName("label_4") self.verticalLayout_4.addWidget(self.label_4) self.verticalSlider_bg = QtWidgets.QSlider(self.centralwidget) self.verticalSlider_bg.setOrientation(QtCore.Qt.Vertical) self.verticalSlider_bg.setObjectName("verticalSlider_bg") self.verticalLayout_4.addWidget(self.verticalSlider_bg) self.horizontalLayout.addLayout(self.verticalLayout_4) self.verticalLayout_5 = QtWidgets.QVBoxLayout() self.verticalLayout_5.setObjectName("verticalLayout_5") self.label_5 = QtWidgets.QLabel(self.centralwidget) font = QtGui.QFont() font.setFamily("宋体") font.setPointSize(20) self.label_5.setFont(font) self.label_5.setObjectName("label_5") self.verticalLayout_5.addWidget(self.label_5) self.verticalSlider_sd = QtWidgets.QSlider(self.centralwidget) self.verticalSlider_sd.setOrientation(QtCore.Qt.Vertical) self.verticalSlider_sd.setObjectName("verticalSlider_sd") self.verticalLayout_5.addWidget(self.verticalSlider_sd) self.horizontalLayout.addLayout(self.verticalLayout_5) self.horizontalLayout_2.addLayout(self.horizontalLayout) self.horizontalLayout_2.setStretch(0, 7) self.horizontalLayout_2.setStretch(1, 3) MainWindow.setCentralWidget(self.centralwidget) self.menubar = QtWidgets.QMenuBar(MainWindow) self.menubar.setGeometry(QtCore.QRect(0, 0, 1019, 23)) self.menubar.setObjectName("menubar") MainWindow.setMenuBar(self.menubar) self.statusbar = QtWidgets.QStatusBar(MainWindow) self.statusbar.setObjectName("statusbar") MainWindow.setStatusBar(self.statusbar) self.retranslateUi(MainWindow) QtCore.QMetaObject.connectSlotsByName(MainWindow) def retranslateUi(self, MainWindow): _translate = QtCore.QCoreApplication.translate MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow")) self.label_pic.setText(_translate("MainWindow", "TextLabel")) self.label.setText(_translate("MainWindow", "亮度")) self.label_2.setText(_translate("MainWindow", "对比度")) self.label_3.setText(_translate("MainWindow", "饱和度")) self.label_4.setText(_translate("MainWindow", "曝光度")) self.label_5.setText(_translate("MainWindow", "色调"))