cv2读取图片用PyQt5中的Qlabel显示图片

import cv2
import sys
from PyQt5 import QtGui
from PyQt5.QtWidgets import QApplication, QWidget, QLabel, QHBoxLayout


class QPixmapDemo(QWidget):
    def __init__(self):
        super().__init__()
        self.setUI()
        self.setImage()

    #设置ui界面
    def setUI(self):
        self.resize(800, 600)
        self.setWindowTitle('picture')
        self.imgLabel = QLabel()
        self.imgLabel.resize(300, 300) #设置label的大小,图片会适配label的大小
        self.hbox = QHBoxLayout()
        self.hbox.addWidget(self.imgLabel)
        self.setLayout(self.hbox)

    def setImage(self):
        img = cv2.imread('test.jpg') #opencv读取图片
        img2 = cv2.cvtColor(img, cv2.COLOR_BGR2RGB) #opencv读取的bgr格式图片转换成rgb格式
        _image = QtGui.QImage(img2[:], img2.shape[1], img2.shape[0], img2.shape[1] * 3, QtGui.QImage.Format_RGB888) #pyqt5转换成自己能放的图片格式
        jpg_out = QtGui.QPixmap(_image).scaled(self.imgLabel.width(), self.imgLabel.height()) #设置图片大小
        self.imgLabel.setPixmap(jpg_out) #设置图片显示


if __name__ == '__main__':
    app = QApplication(sys.argv)
    win = QPixmapDemo()
    win.show()
    sys.exit(app.exec_())