Source code for tomo.protocols.protocol_extract_coordinates

# -*- coding: utf-8 -*-
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# * Authors:     David Herreros Calero (
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# * Unidad de  Bioinformatica of Centro Nacional de Biotecnologia , CSIC
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import numpy as np

from pyworkflow import BETA
import pyworkflow.protocol.params as params
import pyworkflow.utils as pwutils

from .protocol_base import ProtTomoPicking

import tomo.constants as const
from ..objects import Coordinate3D

[docs]class ProtTomoExtractCoords(ProtTomoPicking): """ Extract the coordinates information from a set of subtomograms. This protocol is useful when we want to re-extract the subtomograms (maybe resulting from classification) with the original dimensions. It can be also handy to visualize the resulting subtomograms in their location on the tomograms. """ _label = 'extract 3D coordinates' _devStatus = BETA # --------------------------- DEFINE param functions ---------------------- def _defineParams(self, form): form.addSection(label='Input') form.addParam('inputSubTomos', params.PointerParam, pointerClass='SetOfSubTomograms', label='Subtomograms', important=True, help='Select the subtomograms from which you want\n' 'to extract the coordinates. The coordinate belonging to ' 'each subtomogram should be already associated to an initial ' 'tomogram.') form.addParam('inputTomos', params.PointerParam, pointerClass='SetOfTomograms', label='Tomograms', important=True, help='Select the tomograms to which you want to\n' 'associate the coordinates from the subtomograms.') form.addParam('boxSize', params.IntParam, allowsNull=True, expertLevel=params.LEVEL_ADVANCED, label='Box Size', help='Determine the box size of the extracted coordinates. By default, ' 'the program assigns the box size directly from the coordinates ' 'associated to the subtomograms.') form.addParallelSection(threads=0, mpi=0) # --------------------------- INSERT steps functions ---------------------- def _insertAllSteps(self): self._insertFunctionStep('extractCoordinatesStep') self._insertFunctionStep('createOutputStep')
[docs] def extractCoordinatesStep(self): inTomos = self.getInputTomos() inSubTomos = self.getInputSubTomos() scale = inSubTomos.getSamplingRate() / inTomos.getSamplingRate() print("Scaling coordinates by a factor *%0.2f*" % scale) filesTomo = [pwutils.removeBaseExt(tomo.getFileName()) for tomo in inTomos.iterItems()] suffix = '' self.outputCoords = self._createSetOfCoordinates3D(inTomos, suffix=suffix) self.outputCoords.setSamplingRate(inTomos.getSamplingRate()) def appendCoordFromSubTomo(subTomo, boxSize): coord = subTomo.getCoordinate3D() tomoKey = coord.getVolId() tomo = inTomos[tomoKey] if tomo is None: print("Key %s not found, trying to associate tomogram using filename" % tomoKey) try: idx = filesTomo.index(pwutils.removeBaseExt(subTomo.getVolName())) except: idx = None if idx is not None: if len(filesTomo) == 1: newCoord.setVolume(inTomos.getFirstItem()) coord.setVolume(inTomos.getFirstItem()) else: newCoord.setVolume(inTomos[idx+1]) coord.setVolume(inTomos[idx+1]) x, y, z = coord.getPosition(const.SCIPION) newCoord.copyObjId(subTomo) newCoord.setPosition(x * scale, y * scale, z * scale, const.SCIPION) newCoord.setBoxSize(boxSize) newCoord.setMatrix(checkMatrix(subTomo, coord)) if coord.hasGroupId(): newCoord.setGroupId(coord.getGroupId()) self.outputCoords.append(newCoord) else: coord.setVolume(tomo) newCoord.copyObjId(subTomo) x, y, z = coord.getPosition(const.SCIPION) newCoord.setVolume(tomo) newCoord.setPosition(x * scale, y * scale, z * scale, const.SCIPION) newCoord.setBoxSize(boxSize) newCoord.setMatrix(checkMatrix(subTomo, coord)) self.outputCoords.append(newCoord) def checkMatrix(subTomo, coord): transform_subTomo = subTomo.getTransform().getMatrix() transform_coordinate = coord.getMatrix() if not np.allclose(transform_coordinate, np.eye(transform_coordinate.shape[0])): return transform_coordinate elif not np.allclose(transform_subTomo, np.eye(transform_subTomo.shape[0])): return transform_subTomo else: return np.eye(transform_subTomo.shape[0]) newCoord = Coordinate3D() if self.boxSize.get() is None: boxSize = inSubTomos.getXDim() * scale else: boxSize = self.boxSize.get() for subTomo in inSubTomos: appendCoordFromSubTomo(subTomo, boxSize) self.outputCoords.setBoxSize(boxSize)
[docs] def createOutputStep(self): if self.outputCoords.getSize() > 0: self._defineOutputs(outputCoordinates3D=self.outputCoords) self._defineSourceRelation(self.inputSubTomos, self.outputCoords) self._defineSourceRelation(self.inputTomos, self.outputCoords) else: raise Exception("No coordinates were extracted from the input subtomograms probably " "due to an issue during the association with the new tomograms. In case " "the association was done by the filename, please, check that the tomograms where " "subtomograms were extracted and new tomograms have the same file names " "and try again.")
# ------------- UTILS functions ----------------
[docs] def getSuffix(self, suffix): return "_tmp%s" % suffix
[docs] def getTmpOutputPath(self, suffix): return self._getPath("coordinates%s.sqlite" % self.getSuffix(suffix))
[docs] def getInputTomos(self): return self.inputTomos.get()
[docs] def getInputSubTomos(self): return self.inputSubTomos.get()
# --------------------------- INFO functions ------------------------------ def _summary(self): summary = [] ps1 = self.getInputSubTomos().getSamplingRate() ps2 = self.getInputTomos().getSamplingRate() summary.append(u'Input subtomograms pixel size: *%0.3f* (Å/px)' % ps1) summary.append(u'Input tomograms pixel size: *%0.3f* (Å/px)' % ps2) summary.append('Scaling coordinates by a factor of *%0.3f*' % (ps1 / ps2)) if hasattr(self, 'outputCoordinates3D'): summary.append('Output coordinates: *%d*' % self.outputCoordinates3D.getSize()) return summary def _methods(self): return self._summary() def _validate(self): """ The function of this hook is to add some validation before the protocol is launched to be executed. It should return a list of errors. """ errors = [] inputSubTomos = self.getInputSubTomos() first = inputSubTomos.getFirstItem() if first.getCoordinate3D() is None: errors.append('The input particles do not have coordinates!!!') return errors