pyqt5的圆形laebl显示摄像头

from PyQt5.QtWidgets import * from PyQt5.QtGui import * from PyQt5.QtCore import * from PyQt5.QtCore import QDateTime from PyQt5 import QtWidgets, QtGui, QtCore import sys import cv2 import numpy as np from ui.raspberry import Ui_MainWindow class MyWindows(QtWidgets.QMainWindow, Ui_MainWindow): def __init__(self): super(MyWindows, self).__init__() self.setupUi(self) self.cap = cv2.VideoCapture() # 视频流 self.timer_camera = QTimer() # 定义定时器，用于控制显示视频的帧率 self.CAM_NUM = 0 # 为0时表示视频流来自笔记本内置摄像头 self.slot_init() # 初始化槽函数 self.timer1 = QTimer() self.timer1.timeout.connect(self.showTime) self.timer1.start(1000) self.set_label() self.yanmo() def showTime(self): # print(1) time = QDateTime.currentDateTime() timeDisplay = time.toString("yyyy-MM-dd hh:mm:ss") self.label_time.setText(timeDisplay) self.label_time.setFont(QFont("宋体", 16, QFont.Bold)) def set_label(self): self.label_name.setText('人脸打卡终端') self.label_name.setFont(QFont("宋体", 16, QFont.Bold)) self.label_name.setAlignment(Qt.AlignCenter) def yanmo(self): opencv = cv2.imread('./resource/1231.jpg') # todo 指定黑色范围 minGreen = np.array([-1, -1, -1]) maxGreen = np.array([10, 10, 10]) # todo 确定黑色范围 mask = cv2.inRange(opencv, minGreen, maxGreen) # todo 确定非黑色范围 self.mask_not = cv2.bitwise_not(mask) # todo 通过掩码控制的按位与运算锁定白色区域 def slot_init(self): self.timer_camera.timeout.connect(self.show_camera) self.pushButton.clicked.connect(self.slotCameraButton) def show_camera(self): ret, self.image = self.cap.read() green_not = cv2.bitwise_and(self.image, self.image, mask=self.mask_not) # todo 拆分为3通道 b, g, r = cv2.split(green_not) # todo 合成四通道 bgra = cv2.merge([b, g, r, self.mask_not]) cv2.imwrite('./resource/1.png', bgra) pix = QPixmap('./resource/1.png') self.label_video.setPixmap(pix) self.label_video.setScaledContents(True) def slotCameraButton(self): if self.timer_camera.isActive() == False: self.openCamera() else: self.closeCamera() def openCamera(self): ret = self.cap.open(self.CAM_NUM) if ret == False: msg = QMessageBox.Warning(self, u'Warning', u'请检测相机与电脑是否连接正确', buttons=QMessageBox.Ok, defaultButton=QMessageBox.Ok) else: self.timer_camera.start(10) def closeCamera(self): self.timer_camera.stop() self.label_video.clear() self.cap.release() self.pushButton.setText('信息录入') if __name__ == '__main__': app = QApplication(sys.argv) my_windows = MyWindows() # 实例化对象 # print(123123) my_windows.show() # 显示窗口 # # my_windows.showFullScreen() # 显示窗口 # sys.exit(app.exec_()) sys.exit(app.exec_())