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这个图像标注版本在前面多标注框基础上图片标记，增加了标注标签的选择，同时修正了一下之前绘制最后一个标注框的显示问题，现在看起来更像一个标注软件了。

参照labelImg的样式定义了一个自定义Dialog窗口，在这个窗口中加载了标注标签列表文件，同时这个标签是要必须选择的，或者取消。

对多标注框的代码重新做了优化图片标记，一个是关于正在绘制的标注框的显示问题，如果标签取消，则不予绘制，如果选择了标签才绘制出来

图片标记-图像标注版本3-多标注框+标注标签_80楼网赚论坛|80楼网创

一、通过qt designer设计一个标签选择的自定义Dialog窗口

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

# Form implementation generated from reading ui file 'ui_labelchoose.ui'
#
# Created by: PyQt5 UI code generator 5.15.4
#
# 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_Dialog(object):
    def setupUi(self, Dialog):
        Dialog.setObjectName("Dialog")
        Dialog.resize(285, 336)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Preferred, QtWidgets.QSizePolicy.Preferred)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(Dialog.sizePolicy().hasHeightForWidth())
        Dialog.setSizePolicy(sizePolicy)
        Dialog.setMinimumSize(QtCore.QSize(285, 336))
        Dialog.setMaximumSize(QtCore.QSize(285, 336))
        self.buttonBox = QtWidgets.QDialogButtonBox(Dialog)
        self.buttonBox.setGeometry(QtCore.QRect(80, 39, 193, 28))
        self.buttonBox.setOrientation(QtCore.Qt.Horizontal)
        self.buttonBox.setStandardButtons(QtWidgets.QDialogButtonBox.Cancel|QtWidgets.QDialogButtonBox.Ok)
        self.buttonBox.setObjectName("buttonBox")
        self.leditChoosedLabel = QtWidgets.QLineEdit(Dialog)
        self.leditChoosedLabel.setGeometry(QtCore.QRect(11, 11, 261, 21))
        self.leditChoosedLabel.setObjectName("leditChoosedLabel")
        self.leditChoosedLabel.setEnabled(False)
        self.lviewLabelList = QtWidgets.QListView(Dialog)
        self.lviewLabelList.setGeometry(QtCore.QRect(10, 80, 261, 241))
        self.lviewLabelList.setEditTriggers(QtWidgets.QAbstractItemView.NoEditTriggers)
        self.lviewLabelList.setObjectName("lviewLabelList")

        self.retranslateUi(Dialog)
        QtCore.QMetaObject.connectSlotsByName(Dialog)

    def retranslateUi(self, Dialog):
        _translate = QtCore.QCoreApplication.translate
        Dialog.setWindowTitle(_translate("Dialog", "Dialog"))

二、实现自定义Dialog的相关功能

一个是初始化过程中对标签列表文件的加载

一个是QListView的点击事件

一个是Dialog的返回值

最后一个是对OK按钮事件的校验，确保已经选择了标签

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QMainWindow, QApplication,  QDialog,QMessageBox
from PyQt5.QtCore import QStringListModel

class DialogChoooseLabelWin(QDialog, Ui_Dialog):
    def __init__(self,parent=None):
        # super(DialogChoooseLabelWin, self).__init__()
        QDialog.__init__(self,parent)
        self.setupUi(self)
        self.labelList=[]
        self.initLableList()
        self.lviewLabelList.clicked.connect(self.clickedlist)
        self.buttonBox.accepted.connect(self.validate)
        self.buttonBox.rejected.connect(self.reject)

    def initLableList(self):
        with open('datalabellistbak.txt', 'r',encoding='utf-8') as f:
            self.labelList=[line.strip() for line in f]
        self.labelslm=QStringListModel()
        self.labelslm.setStringList(self.labelList)
        self.lviewLabelList.setModel(self.labelslm)

    def clickedlist(self, qModelIndex):
        self.leditChoosedLabel.setText(self.labelList[qModelIndex.row()])

    def getValue(self):
        return self.leditChoosedLabel.text()

    def validate(self):
        if self.leditChoosedLabel.text()!='':
            self.accept()

if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    Dialog=DialogChoooseLabelWin()
    print('dialogChooseLabel.exec_()=', Dialog.exec_())
    print('dialogChooseLabel.getValue()=', Dialog.getValue())
    sys.exit(app.exec_())

三、对原来的MyLabel进行重写，参见加粗字体部分

引入了一个实时坐标的概念

在鼠标移动事件中，不断根据鼠标位置进行实时绘制

在鼠标释放事件中，增加了一个对话框选择项，确认后将相关标注项加入到bboxlist中（bboxlist相对于2.0版本有所调整）

在绘制事件中，修正了对实时标注框的单独绘制

from PyQt5.QtWidgets import QWidget, QApplication, QLabel
from PyQt5.QtCore import QRect, Qt
from PyQt5.QtGui import QPixmap, QPainter, QPen
from ui_labelchoose import DialogChoooseLabelWin
import sys

# 重定义QLabel，实现绘制事件和各类鼠标事件
class MyLabel(QLabel):
    def __init__(self, parent=None):
        '''
        :param parent:
        初始化基本参数
        '''
        super(MyLabel, self).__init__(parent)
        self.x0 = 0
        self.y0 = 0
        self.x1 = 0
        self.y1 = 0
        self.x1RealTime = 0
        self.y1RealTime = 0
        self.rect = QRect()
        self.flag = False
        # 增加一个存储标注框坐标的列表
        self.bboxList=[]

    # 单击鼠标触发事件
    # 获取鼠标事件的开始位置
    def mousePressEvent(self, event):
        # 将绘制标志设置为True
        self.flag = True
        self.x0 = event.pos().x()
        self.y0 = event.pos().y()

    # 鼠标移动事件
    # 绘制鼠标行进过程中的矩形框
    def mouseMoveEvent(self, event):
        if self.flag:
            self.x1RealTime = event.pos().x()
            self.y1RealTime = event.pos().y()
            self.update()


    # 鼠标释放事件
    def mouseReleaseEvent(self, event):
        # 将绘制标志设置为False
        self.flag = False
        self.x1 = event.pos().x()
        self.y1 = event.pos().y()
        self.x1RealTime = self.x0
        self.y1RealTime = self.y0  # 这样就不用画出实时框了
        # 将标注框的四个坐标轴存储到bboxList
        dialogChooseLabel = DialogChoooseLabelWin()
        if dialogChooseLabel.exec_():
            labelname = dialogChooseLabel.getValue()
            self.saveBBbox(self.x0, self.y0, self.x1, self.y1, labelname)
        event.ignore()

    # 绘制事件
    def paintEvent(self, event):
        super().paintEvent(event)
        painter = QPainter()
        # 增加绘制开始和结束时间
        painter.begin(self)
        # 遍历之前存储的标注框坐标列表
        for point in self.bboxList:
            rect = QRect(point[0], point[1], abs(point[0]-point[2]), abs(point[1]-point[3]))
            painter.setPen(QPen(Qt.red, 2, Qt.SolidLine))
            painter.drawRect(rect)
            painter.drawText(point[0], point[1], point[4])
        # 绘制当前标注框的举行
        # 构造矩形框的起始坐标和宽度、高度
        tempx0 = min(self.x0, self.x1RealTime)
        tempy0 = min(self.y0, self.y1RealTime)
        tempx1 = max(self.x0, self.x1RealTime)
        tempy1 = max(self.y0, self.y1RealTime)
        width=tempx1-tempx0
        height=tempy1-tempy0
        currect = QRect(tempx0, tempy0, width, height)
        # 构造QPainter，进行矩形框绘制
        painter.setPen(QPen(Qt.blue, 1, Qt.SolidLine))
        painter.drawRect(currect)
        painter.end()

    # 保存到bbox列表
    def saveBBbox(self,x0,y0,x1,y1,labelname):
        tempx0 = min(x0, x1)
        tempy0 = min(y0, y1)
        tempx1 = max(x0, x1)
        tempy1 = max(y0, y1)
        bbox = (tempx0, tempy0, tempx1, tempy1,labelname)
        self.bboxList.append(bbox)

四、窗口类和main函数未做调整


# 窗口类
class LabelV1(QWidget):
    def __init__(self):
        super(LabelV1, self).__init__()
        self.initUI()

    def initUI(self):
        self.resize(960, 540)
        self.move(100, 50)
        self.setWindowTitle('Label标注框3.0版本')
        # 加载重定义的label
        self.lbl = MyLabel(self)
        # 构造QPixmap，加载待标注图片
        img = QPixmap('010.png')
        # 在自定义label中显示QImage
        self.lbl.setPixmap(img)
        self.lbl.setCursor(Qt.CrossCursor)
        self.show()


if __name__ == '__main__':
    app = QApplication(sys.argv)
    labelwin = LabelV1()
    sys.exit(app.exec())