pyqt5 读取numpy arrray 显示图片

目录

1、GUI界面（QT designer设计）

2、逻辑函数（回调等）

3、显示图片在label上

1）显示彩色图

彩色图显示色调不正常——opencv（BGR）QT(RGB)需要进行转换

2）显示灰度图

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1、GUI界面（QT designer设计）

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

# Form implementation generated from reading ui file 'ImshowImgWithMatGUI.ui'
#
# Created by: PyQt5 UI code generator 5.15.1
#
# 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(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(280, 460, 201, 23))
        self.pushButton.setObjectName("pushButton")
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(210, 90, 351, 291))
        self.label.setObjectName("label")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 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.pushButton.setText(_translate("MainWindow", "通过数组显示图片"))
        self.label.setText(_translate("MainWindow", "TextLabel"))

2、逻辑函数（回调等）

import cv2 as cv
from PyQt5.QtGui import QImage,QPixmap
from PyQt5.QtWidgets import QApplication, QMainWindow
from ImshowImgWithMatGUI import Ui_MainWindow
import sys

class My_UI(QMainWindow, Ui_MainWindow):
    def __init__(self):
        QMainWindow.__init__(self)
        Ui_MainWindow.__init__(self)
        self.setupUi(self)
        self.setWindowTitle('窗口标题')
    def pushbuttonthing(self):
        # 读取彩色图片
        img_src = cv.imread(r"X:\4.jpg",)
        img_src = cv.cvtColor(img_src,cv.COLOR_BGR2RGB)
        # 读取label宽高
        label_width = self.label.width()
        label_height = self.label.height()

        # 将图片转换为QImage
        temp_imgSrc = QImage(img_src, img_src.shape[1], img_src.shape[0],img_src.shape[1]*3, QImage.Format_RGB888)
        # 将图片转换为QPixmap方便显示
        pixmap_imgSrc = QPixmap.fromImage(temp_imgSrc).scaled(label_width, label_height)

        # 使用label进行显示
        self.label.setPixmap(pixmap_imgSrc)

    def run(self):
        self.pushButton.clicked.connect(self.pushbuttonthing)
if __name__ == '__main__':
    app = QApplication(sys.argv)

    # 显示窗口
    win = My_UI()
    win.show()
    win.run()
    sys.exit(app.exec_())

3、显示图片在label上

1）显示彩色图

img_src是通过imread读取的彩色图像

QImage.Format_RGB888

# 将图片转换为QImage
        temp_imgSrc = QImage(img_src, img_src.shape[1], img_src.shape[0],img_src.shape[1]*3, QImage.Format_RGB888)
        # 将图片转换为QPixmap方便显示
        pixmap_imgSrc = QPixmap.fromImage(temp_imgSrc).scaled(label_width, label_height)

        # 使用label进行显示
        self.label.setPixmap(pixmap_imgSrc)

彩色图显示色调不正常——opencv（BGR）QT(RGB)需要进行转换

img_src = cv.cvtColor(img_src,cv.COLOR_BGR2RGB)

 

2）显示灰度图

显示灰度图像（其中灰度图像是由彩色直接通过）

QImage.Format_Format_Grayscale8

# 将图片转换为QImage
        temp_imgSrc = QImage(img_src, img_src.shape[1], img_src.shape[0], QImage.Format_Format_Grayscale8)
        # 将图片转换为QPixmap方便显示
        pixmap_imgSrc = QPixmap.fromImage(temp_imgSrc).scaled(label_width, label_height)

        # 使用label进行显示
        self.label.setPixmap(pixmap_imgSrc)