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MaMPyGUIDemoMaxTree.py
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MaMPyGUIDemoMaxTree.py
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#!/usr/bin/python3
# -*- coding: utf-8 -*-
"""
User interface for demonstration of max-tree and area open filter.
Implementation
C. Meyer
"""
import sys
import numpy as np
import qimage2ndarray
# Qt5 includes
from PyQt5.QtWidgets import QApplication, QMainWindow, QAction, QFileDialog
from PyQt5.QtWidgets import QWidget, QLabel, QSlider, QSpinBox
from PyQt5.QtWidgets import QHBoxLayout, QVBoxLayout
from PyQt5.QtGui import QPixmap
from PyQt5 import QtCore
# MaMPy includes
# Utilities
from utils import image_read
# Max-Tree Berger
from maxtree import maxtree_union_find_level_compression, compute_attribute_area, direct_filter
class MaMPyGUIDemoMaxTree(QMainWindow):
# default size of GUI
xsize = 800
ysize = 600
# Images Attributes
imageSrc = None
imageSrcFlat = None
maxtree_p = None
maxtree_s = None
maxtree_a = None
# Initialisation of the class
def __init__(self):
super().__init__()
self.initUI()
# Initialisation of the user interface.
def initUI(self):
# Image Label Source
self.imageLabelSrc = QLabel()
self.imageLabelSrc.setAlignment(QtCore.Qt.AlignCenter)
# Image Label Result
self.imageLabelRes = QLabel()
self.imageLabelRes.setAlignment(QtCore.Qt.AlignCenter)
# Area Threshold Slider
self.areaThresholdSlider = QSlider(QtCore.Qt.Horizontal)
self.areaThresholdSlider.setRange(0, 1)
self.areaThresholdSlider.valueChanged.connect(self.areaThresholdSliderChanged)
# Area Threshold Spinbox
self.areaThresholdSpinbox = QSpinBox()
self.areaThresholdSpinbox.setRange(0, 1)
self.areaThresholdSpinbox.valueChanged.connect(self.areaThresholdSpinboxChanged)
# Layout
self.imageLabelLayout = QHBoxLayout()
self.thresholdLayout = QHBoxLayout()
self.imageLabelLayout.addWidget(self.imageLabelSrc)
self.imageLabelLayout.addWidget(self.imageLabelRes)
self.imageLabelLayoutWidget = QWidget()
self.imageLabelLayoutWidget.setLayout(self.imageLabelLayout)
self.thresholdLayout.addWidget(self.areaThresholdSlider)
self.thresholdLayout.addWidget(self.areaThresholdSpinbox)
self.thresholdLayoutWidget = QWidget()
self.thresholdLayoutWidget.setLayout(self.thresholdLayout)
self.mainLayout = QVBoxLayout()
self.mainLayout.addWidget(self.imageLabelLayoutWidget)
self.mainLayout.addWidget(self.thresholdLayoutWidget)
# Main Widget
self.window = QWidget()
self.window.setLayout(self.mainLayout)
# Set Central Widget
self.setCentralWidget(self.window)
# Actions
# Open File
openFile = QAction('Open', self)
openFile.setShortcut('Ctrl+O')
openFile.triggered.connect(self.openImageDialog)
menubar = self.menuBar()
fileMenu = menubar.addMenu('&File')
fileMenu.addAction(openFile)
# Center Window
xbase = (app.desktop().screenGeometry().width() - self.xsize) / 2
ybase = (app.desktop().screenGeometry().height() - self.ysize) / 2
# Window Property
self.setGeometry(xbase, ybase, self.xsize, self.ysize)
self.setWindowTitle('MaMPy Max-Tree demo')
self.show()
def resizeEvent(self, event):
self.xsize = event.size().width()
self.ysize = event.size().height()
self.updateImages()
QMainWindow.resizeEvent(self, event)
def areaThresholdSliderChanged(self, event):
self.areaThresholdSpinbox.setValue(self.areaThresholdSlider.value())
self.updateImages()
def areaThresholdSpinboxChanged(self, event):
self.areaThresholdSlider.setValue(self.areaThresholdSpinbox.value())
self.updateImages()
def openImageDialog(self):
filename = QFileDialog.getOpenFileName(self, "Open file", None, 'Image Files (*.png *.jpg *.bmp)')
if filename[0]:
# Read the image
self.imageSrc = image_read(filename[0])
# Compute the Max-Tree
(self.maxtree_p, self.maxtree_s) = maxtree_union_find_level_compression(self.imageSrc, connection8=True)
self.imageSrcFlat = self.imageSrc.flatten()
self.maxtree_a = compute_attribute_area(self.maxtree_s, self.maxtree_p, self.imageSrcFlat)
# Update slider and spinbox in the image resolution range
self.areaThresholdSlider.setRange(0, (self.imageSrc.shape[0] * self.imageSrc.shape[1]))
self.areaThresholdSpinbox.setRange(0, (self.imageSrc.shape[0] * self.imageSrc.shape[1]))
# Update the image label
self.updateImages()
def updateImages(self):
# Check if an image is loaded
if self.imageSrc is None:
return
# Image Source
pixmapSrc = QPixmap(qimage2ndarray.array2qimage(self.imageSrc))
pixmapSrc = pixmapSrc.scaled((self.xsize / 2) - 50, self.ysize - 50, QtCore.Qt.KeepAspectRatio)
self.imageLabelSrc.setPixmap(pixmapSrc)
# Image Result
self.imageRes = direct_filter(self.maxtree_s, self.maxtree_p, self.imageSrcFlat, self.maxtree_a, self.areaThresholdSpinbox.value())
self.imageRes = self.imageRes.reshape(self.imageSrc.shape)
pixmapRes = QPixmap(qimage2ndarray.array2qimage(self.imageRes))
pixmapRes = pixmapRes.scaled((self.xsize / 2) - 50, self.ysize - 50, QtCore.Qt.KeepAspectRatio)
self.imageLabelRes.setPixmap(pixmapRes)
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = MaMPyGUIDemoMaxTree()
sys.exit(app.exec_())