particleeditor.py 7.92 KB
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# -*- coding: utf-8 -*-
"""
Created on Wed Jan 16 12:43:00 2019

@author: brandt
"""

"""
GEPARD - Gepard-Enabled PARticle Detection
Copyright (C) 2018  Lars Bittrich and Josef Brandt, Leibniz-Institut für 
Polymerforschung Dresden e. V. <bittrich-lars@ipfdd.de>    

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program, see COPYING.  
If not, see <https://www.gnu.org/licenses/>.
"""
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import numpy as np
import cv2
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from PyQt5 import QtWidgets, QtCore
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class ParticleContextMenu(QtWidgets.QMenu):
    combineParticlesSignal = QtCore.pyqtSignal(list, str)
    reassignParticlesSignal = QtCore.pyqtSignal(list, str)
    def __init__(self, sampleView):
        super(ParticleContextMenu, self).__init__()
        self.sampleView = sampleView
        self.selectedParticleIndices = self.sampleView.selectedParticleIndices
        self.particleContainer = self.sampleView.dataset.particleContainer
        
    def executeAtScreenPos(self, screenPos):
        self.combineActs = []
        self.combineMenu = QtWidgets.QMenu("Combine Particles into")
        assignments = []

        for particleIndex in self.selectedParticleIndices:
            assignment = self.particleContainer.getParticleAssignmentByIndex(particleIndex)
            assignments.append(assignment)
        
        for assignment in np.unique(assignments):
            self.combineActs.append(self.combineMenu.addAction(assignment))
        self.combineActs.append(self.combineMenu.addAction("other"))
        
        self.reassignActs = []
        self.reassignMenu = QtWidgets.QMenu("Reassign particle(s) into")
        for polymType in self.particleContainer.getUniquePolymers():
            self.reassignActs.append(self.reassignMenu.addAction(polymType))
        self.reassignActs.append(self.reassignMenu.addAction("other"))
        
        numParticles = len(self.selectedParticleIndices)
        if numParticles == 0:
            self.reassignMenu.setDisabled(True)
            self.combineMenu.setDisabled(True)
        elif numParticles == 1:
            self.combineMenu.setDisabled(True)
            
        self.addMenu(self.combineMenu)        
        self.addMenu(self.reassignMenu)
        
        action = self.exec_(screenPos)

        if action in self.combineActs:
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            newAssignment = self.validifyAssignment(action.text())
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            self.combineParticlesSignal.emit(self.selectedParticleIndices, newAssignment)
        elif action in self.reassignActs:
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            newAssignment = self.validifyAssignment(action.text())
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            self.reassignParticlesSignal.emit(self.selectedParticleIndices, newAssignment)
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    def validifyAssignment(self, assignment):
        if assignment == "other":
            assignment = self.getNewEntry()
        return assignment
    
    def getNewEntry(self):
        text, okClicked = QtWidgets.QInputDialog.getText(QtWidgets.QWidget(), "Custom assignment", "Enter new assignment")
        if okClicked and text != '':
            return text
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class ParticleEditor(QtCore.QObject):
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    particleEditProcessStarted = QtCore.pyqtSignal()
    particlesEdited = QtCore.pyqtSignal()
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    def __init__(self, sampleView, particleContainer):
        super(ParticleEditor, self).__init__()
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        self.particleContainer = particleContainer
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        self.sampleView = sampleView    #the assigned analysis widget
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        self.backupFreq = 3     #save a backup every n actions
        self.neverBackedUp = True
        self.actionCounter = 0
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    def connectToSignals(self, contextMenu):
        contextMenu.combineParticlesSignal.connect(self.combineParticles)
        contextMenu.reassignParticlesSignal.connect(self.reassignParticles)
        
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    def createSafetyBackup(self):
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        self.actionCounter += 1
        if self.actionCounter == self.backupFreq-1 or self.neverBackedUp:            
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            backupname = self.sampleView.dataset.saveBackup()
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            print('backing up as', backupname)
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            self.neverBackedUp = False
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            self.actionCounter = 0        
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    @QtCore.pyqtSlot(list, str)
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    def combineParticles(self, contourIndices, newAssignment):     
        self.particleEditProcessStarted.emit()
        self.createSafetyBackup()
        print(f'Combining particles {contourIndices} into {newAssignment}')
        contours = self.particleContainer.getParticleContoursByIndex(contourIndices)
        newContour = self.mergeContours(contours.copy())        
        stats = self.characterizeParticle(newContour)

        self.particleContainer.mergeParticles(contourIndices, newContour, stats, newAssignment=newAssignment)
        self.particlesEdited.emit()

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#        #save data
#        minHQI = self.parent.hqiSpinBox.value()
#        compHQI = self.parent.compHqiSpinBox.value()
#        if not self.datastats.saveAnalysisResults(minHQI, compHQI):
#            QtWidgets.QMessageBox.warning(self.parent, 'Error!',
#                    'Data inconsistency after saving!', QtWidgets.QMessageBox.Ok, 
#                    QtWidgets.QMessageBox.Ok)
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    @QtCore.pyqtSlot(list, str)
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    def reassignParticles(self, contourindices, newAssignment):
        self.particleEditProcessStarted.emit()
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        self.createSafetyBackup()
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        print(f'reassigning indices {contourindices} into {newAssignment}')
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        for partIndex in contourindices:
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            self.particleContainer.reassignParticleToAssignment(partIndex, newAssignment)
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        self.particlesEdited.emit()
    
    def mergeContours(self, contours):
        cnt = np.vstack(tuple(contours))  #combine contous
        #draw contours
        xmin, xmax = cnt[:,0,:][:, 0].min(), cnt[:,0,:][:, 0].max()
        ymin, ymax = cnt[:,0,:][:, 1].min(), cnt[:,0,:][:, 1].max()        
        padding = 2    #pixel in each direction
        rangex = int(np.round((xmax-xmin)+2*padding))
        rangey = int(np.round((ymax-ymin)+2*padding))

        img = np.zeros((rangey, rangex))
        for curCnt in contours:
            for i in range(len(curCnt)):
                curCnt[i][0][0] -= xmin-padding
                curCnt[i][0][1] -= ymin-padding
                
            cv2.drawContours(img, [curCnt], -1, 1, -1)
            cv2.drawContours(img, [curCnt], -1, 1, 1)
        
        img = np.uint8(cv2.morphologyEx(img, cv2.MORPH_CLOSE, np.ones((3, 3))))
        
        if cv2.__version__ > '3.5':
            contours, hierarchy = cv2.findContours(img, cv2.RETR_CCOMP, cv2.CHAIN_APPROX_NONE)
        else:
            temp, contours, hierarchy = cv2.findContours(img, cv2.RETR_CCOMP, cv2.CHAIN_APPROX_NONE)

        if len(contours)>1:
            QtWidgets.QMessageBox.critical(self.parent, 'ERROR!', 
                                           'Particle contours are not connected and cannot be combined!')
            return
        
        newContour = contours[0]
        for i in range(len(newContour)):
            newContour[i][0][0] += xmin-padding
            newContour[i][0][1] += ymin-padding
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        return newContour
        
        
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    def characterizeParticle(self, contours):
        ##characterize particle
        longellipse, shortellipse = np.nan, np.nan
        
        cnt = contours
        
        if cnt.shape[0] >= 5:       ##at least 5 points required for ellipse fitting...
            ellipse = cv2.fitEllipse(cnt)
            shortellipse, longellipse = ellipse[1]

        rect = cv2.minAreaRect(cnt)
        long, short = rect[1]
        if short>long:
            long, short = short, long
    
        return long, short, longellipse, shortellipse, cv2.contourArea(cnt)
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