Boundaries.py

from Operation import Operation

class BoundariesOperation(Operation):
    @staticmethod
    def Execute(inputPixmap):
        return inputPixmap

converter.bat

pyuic5 mainwindow.ui -o mainwindow.py

imager.py

import sys
# Импортируем наш интерфейс из файла
from mainwindow import *
from PyQt5 import Qt, QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QFileDialog
from Boundaries import BoundariesOperation


class MyWin(QtWidgets.QMainWindow):
    def __init__(self, parent=None):
        QtWidgets.QWidget.__init__(self, parent)
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self)

        # Здесь прописываем событие нажатия на кнопку
        self.ui.loadButton.clicked.connect(self.loadImage)
        self.ui.boundariesButton.clicked.connect(self.getBoundaries)
        self.ui.keepRatio.stateChanged.connect(self.ui.label.setKeepAspectRatioEnabled)
        self.ui.keepRatio.stateChanged.connect(self.ui.label_2.setKeepAspectRatioEnabled)
        self.ui.originalSize.stateChanged.connect(self.ui.label.setOverscaleEnabled)
        self.ui.originalSize.stateChanged.connect(self.ui.label_2.setOverscaleEnabled)

    # Пока пустая функция которая выполняется
    # при нажатии на кнопку
    def loadImage(self):
        inputImagePath = QFileDialog.getOpenFileName(self, 'Open image...', '/home')[0]
        inputPixmap = Qt.QPixmap(inputImagePath)
        self.ui.label.loadPixmapData(inputPixmap)
    
    def getBoundaries(self):
        if self.ui.label.pixmap():
            self.ui.label_2.setPixmap(BoundariesOperation.Execute(self.ui.label.pixmap()))
        

if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    myapp = MyWin()
    myapp.show()
    sys.exit(app.exec_())

mainwindow.py

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

# Form implementation generated from reading ui file 'mainwindow.ui'
#
# Created by: PyQt5 UI code generator 5.9
#
# WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(736, 397)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.verticalLayout = QtWidgets.QVBoxLayout(self.centralwidget)
        self.verticalLayout.setObjectName("verticalLayout")
        self.horizontalLayout = QtWidgets.QHBoxLayout()
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.gridLayout = QtWidgets.QGridLayout()
        self.gridLayout.setObjectName("gridLayout")
        self.label_2 = ScaledPixmap(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.label_2.sizePolicy().hasHeightForWidth())
        self.label_2.setSizePolicy(sizePolicy)
        self.label_2.setFrameShape(QtWidgets.QFrame.StyledPanel)
        self.label_2.setFrameShadow(QtWidgets.QFrame.Sunken)
        self.label_2.setLineWidth(1)
        self.label_2.setText("")
        self.label_2.setScaledContents(False)
        self.label_2.setObjectName("label_2")
        self.gridLayout.addWidget(self.label_2, 0, 1, 1, 1)
        self.groupBox = QtWidgets.QGroupBox(self.centralwidget)
        self.groupBox.setObjectName("groupBox")
        self.horizontalLayout_3 = QtWidgets.QHBoxLayout(self.groupBox)
        self.horizontalLayout_3.setObjectName("horizontalLayout_3")
        self.verticalLayout_2 = QtWidgets.QVBoxLayout()
        self.verticalLayout_2.setObjectName("verticalLayout_2")
        self.boundariesButton = QtWidgets.QPushButton(self.groupBox)
        self.boundariesButton.setObjectName("boundariesButton")
        self.verticalLayout_2.addWidget(self.boundariesButton)
        self.semanticSegmentationButton = QtWidgets.QPushButton(self.groupBox)
        self.semanticSegmentationButton.setObjectName("semanticSegmentationButton")
        self.verticalLayout_2.addWidget(self.semanticSegmentationButton)
        self.stackedWidget = QtWidgets.QStackedWidget(self.groupBox)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.stackedWidget.sizePolicy().hasHeightForWidth())
        self.stackedWidget.setSizePolicy(sizePolicy)
        self.stackedWidget.setObjectName("stackedWidget")
        self.page = QtWidgets.QWidget()
        self.page.setObjectName("page")
        self.horizontalLayout_4 = QtWidgets.QHBoxLayout(self.page)
        self.horizontalLayout_4.setContentsMargins(0, 0, 0, 0)
        self.horizontalLayout_4.setObjectName("horizontalLayout_4")
        self.groupBox_2 = QtWidgets.QGroupBox(self.page)
        self.groupBox_2.setObjectName("groupBox_2")
        self.horizontalLayout_4.addWidget(self.groupBox_2)
        self.stackedWidget.addWidget(self.page)
        self.page_2 = QtWidgets.QWidget()
        self.page_2.setObjectName("page_2")
        self.verticalLayout_3 = QtWidgets.QVBoxLayout(self.page_2)
        self.verticalLayout_3.setContentsMargins(0, 0, 0, 0)
        self.verticalLayout_3.setObjectName("verticalLayout_3")
        self.groupBox_3 = QtWidgets.QGroupBox(self.page_2)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.groupBox_3.sizePolicy().hasHeightForWidth())
        self.groupBox_3.setSizePolicy(sizePolicy)
        self.groupBox_3.setObjectName("groupBox_3")
        self.verticalLayout_3.addWidget(self.groupBox_3)
        self.stackedWidget.addWidget(self.page_2)
        self.verticalLayout_2.addWidget(self.stackedWidget)
        self.horizontalLayout_3.addLayout(self.verticalLayout_2)
        self.gridLayout.addWidget(self.groupBox, 0, 2, 1, 1)
        self.label = ScaledPixmap(self.centralwidget)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.label.sizePolicy().hasHeightForWidth())
        self.label.setSizePolicy(sizePolicy)
        self.label.setFrameShape(QtWidgets.QFrame.StyledPanel)
        self.label.setFrameShadow(QtWidgets.QFrame.Sunken)
        self.label.setLineWidth(1)
        self.label.setText("")
        self.label.setScaledContents(False)
        self.label.setObjectName("label")
        self.gridLayout.addWidget(self.label, 0, 0, 1, 1)
        self.horizontalLayout.addLayout(self.gridLayout)
        self.verticalLayout.addLayout(self.horizontalLayout)
        self.horizontalLayout_2 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_2.setObjectName("horizontalLayout_2")
        self.originalSize = QtWidgets.QCheckBox(self.centralwidget)
        self.originalSize.setObjectName("originalSize")
        self.horizontalLayout_2.addWidget(self.originalSize)
        self.keepRatio = QtWidgets.QCheckBox(self.centralwidget)
        self.keepRatio.setObjectName("keepRatio")
        self.horizontalLayout_2.addWidget(self.keepRatio)
        self.loadButton = QtWidgets.QPushButton(self.centralwidget)
        self.loadButton.setObjectName("loadButton")
        self.horizontalLayout_2.addWidget(self.loadButton)
        spacerItem = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
        self.horizontalLayout_2.addItem(spacerItem)
        self.verticalLayout.addLayout(self.horizontalLayout_2)
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 736, 26))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        self.stackedWidget.setCurrentIndex(0)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "Imager"))
        self.groupBox.setTitle(_translate("MainWindow", "Controlls"))
        self.boundariesButton.setText(_translate("MainWindow", "Boundaries"))
        self.semanticSegmentationButton.setText(_translate("MainWindow", "Semantic Segmentation"))
        self.groupBox_2.setTitle(_translate("MainWindow", "Boundaries options"))
        self.groupBox_3.setTitle(_translate("MainWindow", "Semantis segentation options"))
        self.originalSize.setText(_translate("MainWindow", "Ignore original size"))
        self.keepRatio.setText(_translate("MainWindow", "Maintain puprosions"))
        self.loadButton.setText(_translate("MainWindow", "Load"))

from ScaledPixmap import ScaledPixmap

mainwindow.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>736</width>
    <height>397</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>Imager</string>
  </property>
  <widget class="QWidget" name="centralwidget">
   <layout class="QVBoxLayout" name="verticalLayout">
    <item>
     <layout class="QHBoxLayout" name="horizontalLayout">
      <item>
       <layout class="QGridLayout" name="gridLayout">
        <item row="0" column="1">
         <widget class="ScaledPixmap" name="label_2">
          <property name="sizePolicy">
           <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
            <horstretch>0</horstretch>
            <verstretch>0</verstretch>
           </sizepolicy>
          </property>
          <property name="frameShape">
           <enum>QFrame::StyledPanel</enum>
          </property>
          <property name="frameShadow">
           <enum>QFrame::Sunken</enum>
          </property>
          <property name="lineWidth">
           <number>1</number>
          </property>
          <property name="text">
           <string/>
          </property>
          <property name="scaledContents">
           <bool>false</bool>
          </property>
         </widget>
        </item>
        <item row="0" column="2">
         <widget class="QGroupBox" name="groupBox">
          <property name="title">
           <string>Controlls</string>
          </property>
          <layout class="QHBoxLayout" name="horizontalLayout_3">
           <item>
            <layout class="QVBoxLayout" name="verticalLayout_2">
             <item>
              <widget class="QPushButton" name="boundariesButton">
               <property name="text">
                <string>Boundaries</string>
               </property>
              </widget>
             </item>
             <item>
              <widget class="QPushButton" name="semanticSegmentationButton">
               <property name="text">
                <string>Semantic Segmentation</string>
               </property>
              </widget>
             </item>
             <item>
              <widget class="QStackedWidget" name="stackedWidget">
               <property name="sizePolicy">
                <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
                 <horstretch>0</horstretch>
                 <verstretch>0</verstretch>
                </sizepolicy>
               </property>
               <property name="currentIndex">
                <number>0</number>
               </property>
               <widget class="QWidget" name="page">
                <layout class="QHBoxLayout" name="horizontalLayout_4">
                 <item>
                  <widget class="QGroupBox" name="groupBox_2">
                   <property name="title">
                    <string>Boundaries options</string>
                   </property>
                  </widget>
                 </item>
                </layout>
               </widget>
               <widget class="QWidget" name="page_2">
                <layout class="QVBoxLayout" name="verticalLayout_3">
                 <item>
                  <widget class="QGroupBox" name="groupBox_3">
                   <property name="sizePolicy">
                    <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
                     <horstretch>0</horstretch>
                     <verstretch>0</verstretch>
                    </sizepolicy>
                   </property>
                   <property name="title">
                    <string>Semantis segentation options</string>
                   </property>
                  </widget>
                 </item>
                </layout>
               </widget>
              </widget>
             </item>
            </layout>
           </item>
          </layout>
         </widget>
        </item>
        <item row="0" column="0">
         <widget class="ScaledPixmap" name="label">
          <property name="sizePolicy">
           <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
            <horstretch>0</horstretch>
            <verstretch>0</verstretch>
           </sizepolicy>
          </property>
          <property name="frameShape">
           <enum>QFrame::StyledPanel</enum>
          </property>
          <property name="frameShadow">
           <enum>QFrame::Sunken</enum>
          </property>
          <property name="lineWidth">
           <number>1</number>
          </property>
          <property name="text">
           <string/>
          </property>
          <property name="scaledContents">
           <bool>false</bool>
          </property>
         </widget>
        </item>
       </layout>
      </item>
     </layout>
    </item>
    <item>
     <layout class="QHBoxLayout" name="horizontalLayout_2">
      <item>
       <widget class="QCheckBox" name="originalSize">
        <property name="text">
         <string>Ignore original size</string>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QCheckBox" name="keepRatio">
        <property name="text">
         <string>Maintain puprosions</string>
        </property>
       </widget>
      </item>
      <item>
       <widget class="QPushButton" name="loadButton">
        <property name="text">
         <string>Load</string>
        </property>
       </widget>
      </item>
      <item>
       <spacer name="horizontalSpacer">
        <property name="orientation">
         <enum>Qt::Horizontal</enum>
        </property>
        <property name="sizeHint" stdset="0">
         <size>
          <width>40</width>
          <height>20</height>
         </size>
        </property>
       </spacer>
      </item>
     </layout>
    </item>
   </layout>
  </widget>
  <widget class="QMenuBar" name="menubar">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>736</width>
     <height>26</height>
    </rect>
   </property>
  </widget>
  <widget class="QStatusBar" name="statusbar"/>
 </widget>
 <customwidgets>
  <customwidget>
   <class>ScaledPixmap</class>
   <extends>QLabel</extends>
   <header location="global">scaledpixmap.h</header>
  </customwidget>
 </customwidgets>
 <resources/>
 <connections/>
</ui>

Operation.py

from PyQt5.Qt import QPixmap

class Operation(object):
    #QPixmap pixmap;

    @staticmethod
    def Execute(inputPixmap):
        return inputPixmap

ScaledPixmap.py

from PyQt5.QtWidgets import QLabel
from PyQt5.Qt import Qt, QSize
from PyQt5.QtGui import QPixmap, QPainter
from PyQt5 import QtCore


class ScaledPixmap(QLabel):
    workPixmap = None
    originalSize = None

    keepAspectRatio = False
    overscalingEnabled = False

    loadFinished = QtCore.pyqtSignal()

    def getPixmap(self):
        return self.workPixmap

    def overscaleEnabled(self):
        return self.overscalingEnabled

    def keepAspectRatioEnabled(self):
        return self.keepAspectRatio

    def fitsToScreen(self, screenSize):
        return (screenSize.width() >= self.originalSize.width()) and (screenSize.height() >= self.originalSize.height())

    def paintEvent(self, event):
        painter = QPainter(self)
        if self.workPixmap is not None:
            centerPoint = QtCore.QPoint(0, 0)
            scaledSize = self.size() if self.overscaleEnabled() else (self.originalSize if self.fitsToScreen(self.size()) else self.size())
            scaledPixmap = self.workPixmap.scaled(scaledSize,
                                                  Qt.KeepAspectRatio if self.keepAspectRatio else Qt.IgnoreAspectRatio)
            centerPoint.setX((self.size().width() - scaledPixmap.width()) / 2)
            centerPoint.setY((self.size().height() - scaledPixmap.height()) / 2)
            painter.drawPixmap(centerPoint, scaledPixmap)

        super().paintEvent(event)

    @QtCore.pyqtSlot(QPixmap, name='setScaledPixmap')
    def setScaledPixmap(self, pixmap):
        self.workPixmap = pixmap
        self.originalSize = pixmap.size()
        self.update()

    @QtCore.pyqtSlot(str, name='loadPixmapData')
    def loadPixmapData(self, source):
        pixmap = QPixmap(source)
        if pixmap is not None:
            self.setScaledPixmap(pixmap)

    @QtCore.pyqtSlot(QPixmap, name='loadPixmapData')
    def loadPixmapData(self, pixmap):
        if pixmap is not None:
            self.setScaledPixmap(pixmap)

    @QtCore.pyqtSlot(int, name='setOverscaleEnabled')
    def setOverscaleEnabled(self, enabled):
        self.overscalingEnabled = enabled

    @QtCore.pyqtSlot(int, name='setKeepAspectRatioEnabled')
    def setKeepAspectRatioEnabled(self, enabled):
        self.keepAspectRatio = enabled