Source code for localrec.protocols.protocol_localized_stitch

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# *
# * Authors:         Vahid Abrishami (
# *                  Juha Huiskonen (
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# * Laboratory of Structural Biology,
# * Helsinki Institute of Life Science HiLIFE
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from pwem.emlib import DT_DOUBLE
from pyworkflow.protocol.params import (EnumParam, IntParam, StringParam, BooleanParam,
                                        NumericRangeParam, PathParam, Positive, MultiPointerParam)
from pwem.convert.transformations import euler_from_matrix
from pwem.emlib.image import ImageHandler
from pwem.protocols import ProtPreprocessVolumes
from import *
from pyworkflow.protocol.constants import STEPS_PARALLEL
import pyworkflow.utils.path as putils

from pwem import emlib

from localrec.constants import CMM, LINEAR, symDict
from localrec.utils import load_vectors

[docs]class ProtLocalizedStich(ProtPreprocessVolumes): """ Generate a full volume from a sub-volume applying a point group symmetry operation. An example of usage is to generate the adenovirus capsid from its asymmetric unit. """ _label = 'stitch subvolumes' LINEAR = 0 BSPLINE = 1 def __init__(self, **kwargs): ProtPreprocessVolumes.__init__(self, **kwargs) self.stepsExecutionMode = STEPS_PARALLEL #--------------------------- DEFINE param functions ------------------------ def _defineParams(self, form): form.addSection(label='Input') form.addParam('useHalMaps', BooleanParam, label="Use two half maps?", default=False, help='Stitch half-maps separately') form.addParam('inputSubVolumes', MultiPointerParam, pointerClass='Volume', condition="not useHalMaps", label="Input sub-volumes ", allowsNull=True, help='Select input sub-volume for stitching') form.addParam('inputSubVolumesHalf1', MultiPointerParam, pointerClass='Volume', condition="useHalMaps", label="Input sub-volume for half-map 1", allowsNull=True, help='Select the input sub-volume for half-map 1') form.addParam('inputSubVolumesHalf2', MultiPointerParam, pointerClass='Volume', condition="useHalMaps", label="Input sub_volumes for half-map 2", allowsNull=True, help='Select the input sub-volume for half-map 2') form.addParam('symMasks', MultiPointerParam, pointerClass='VolumeMask', label='Masks', allowsNull=True, help='Mask to normalize final volume. By default a sphere' ' is used as the mask') form.addParam('interpMethod', EnumParam, choices=['linear', 'bspline'], default=LINEAR, label='Method for interpolation') form.addParam('outDim', IntParam, label='Output volume size', validators=[Positive], help='This is size of the output volume after symmetrization') form.addParam('usePreRun', BooleanParam, label="Use previous localrec run(s)", default=False) form.addParam('preRuns', MultiPointerParam, pointerClass='ProtLocalizedRecons', label='Localrec previous runs', allowsNull=True, condition="usePreRun", help="Previous Localrec runs used to extract the parameters") form.addParam('symmetryGroup', StringParam, default='I1', label="Symmetry", condition="not usePreRun", help='There are multiple possibilities for ' 'icosahedral symmetry: \n' '* I1: No-Crowther 222 (standard in Heymann, ' 'Chagoyen & Belnap, JSB, 151 (2005) 196-207)\n' '* I2: Crowther 222 \n' '* I3: 52-setting (as used in SPIDER?) \n' '* I4: A different 52 setting \n') form.addParam('alignSubParticles', BooleanParam, label="Sub-volumes are aligned?", condition="not usePreRun", default=False, help='Set to Yes if you aligned the sub-particles with the z-axis ' 'earlier. Note that the you can mix sub-particles with and ' 'without this additional alignment. ') group = form.addGroup('Vectors', condition="not usePreRun") group.addParam('defineVector', EnumParam, default=CMM, label='Is vector defined by?', choices=['cmm file', 'string'], display=EnumParam.DISPLAY_HLIST) group.addParam('vector', NumericRangeParam, default='0,0,1', label='Location vectors', condition="defineVector==1", help='Vector defining the location of the ' 'sub-particles. The vector is defined by 3 ' 'values x,y,z separated by comma. \n' 'More than one vector can be specified separated by a ' 'semicolon. For example: \n' '0,0,1 # Defines only one vector.\n' '0,0,1; 1,0,0; # Defines two vectors.' ) group.addParam('vectorFile', PathParam, default='', condition="defineVector==0", label='file obtained by Chimera: ', help='CMM file defining the location(s) of the ' 'sub-particle(s). Use instead of a vector. ') group.addParam('length', StringParam, default=-1, label='Alternative length of the vector (A)', help='Use to adjust the sub-particle center. If it ' 'is <= 0, the length of the given vector is used. ' 'Multiple values must be separated by commas.') form.addParallelSection(threads=4, mpi=1) #--------------------------- INSERT steps functions ------------------------ def _insertAllSteps(self): inputStepId = self._insertFunctionStep('convertInputStep') depsSymVolHalf1 = [] depsSymVolHalf2 = [] depsSymVol = [] depsSymMask = [] if self.usePreRun: localRecProt = self.preRuns[0].get() localRecSymGrp = localRecProt.symGrp.get() localRecSymOrd = localRecProt.symmetryOrder.get() if localRecSymGrp == 0 or localRecSymGrp == 1: localRecSym = "%s%d" % (symDict[localRecSymGrp], localRecSymOrd) else: localRecSym = symDict[localRecSymGrp] doAlign = localRecProt.alignSubParticles else: localRecSym = self.symmetryGroup.get() doAlign = self.alignSubParticles if self.useHalMaps: for i, (vol, vol2) in enumerate(zip(self.inputSubVolumesHalf1, self.inputSubVolumesHalf2)): # Check if we have a mask for this volume maskFn = None volFn = vol.get().getFileName() volFn2 = vol2.get().getFileName() if len(self.symMasks) >= i+1: maskFn = self.symMasks[i].get().getFileName() maskVolumeHalf1Id = self._insertFunctionStep('maskVolume', volFn, maskFn,i, 'half1', prerequisites=[inputStepId]) maskVolumeHalf2Id = self._insertFunctionStep('maskVolume', volFn2, maskFn, i, 'half2', prerequisites=[inputStepId]) maskPreprationId = self._insertFunctionStep('prepareMask', i, doAlign, prerequisites=[maskVolumeHalf1Id, maskVolumeHalf2Id]) volPreparationHalf1Id = self._insertFunctionStep('prepareVol', i, 'half1', doAlign, prerequisites=[maskVolumeHalf1Id]) volPreparationHalf2Id = self._insertFunctionStep('prepareObj', i, 'half2', doAlign, 'volume', prerequisites=[maskVolumeHalf2Id]) depsSymVolHalf1.append(volPreparationHalf1Id) depsSymVolHalf2.append(volPreparationHalf2Id) depsSymMask.append(maskPreprationId) genAsymUnitHalf1Id = self._insertFunctionStep('genAsymUnit','half1', prerequisites=depsSymVolHalf1 + depsSymMask) genAsymUnitHalf2Id = self._insertFunctionStep('genAsymUnit','half2', prerequisites=depsSymVolHalf2 + depsSymMask) symMaskStepId = self._insertFunctionStep('symmetrizeObj', localRecSym, '', 'mask', prerequisites=[genAsymUnitHalf1Id, genAsymUnitHalf2Id]) symVolHalf1StepId = self._insertFunctionStep('symmetrizeObj', localRecSym, 'half1', 'volume', prerequisites=[genAsymUnitHalf1Id]) symVolHalf2StepId = self._insertFunctionStep('symmetrizeObj', localRecSym, 'half2', 'volume', prerequisites=[genAsymUnitHalf2Id]) stitchStepHalf1Id = self._insertFunctionStep('stitchParticles', 'half1', prerequisites=[symMaskStepId, symVolHalf1StepId]) stitchStepHalf2Id = self._insertFunctionStep('stitchParticles', 'half2', prerequisites=[symMaskStepId, symVolHalf2StepId]) self._insertFunctionStep('createOutputStep', prerequisites=[stitchStepHalf1Id, stitchStepHalf2Id]) else: for i, vol in enumerate(self.inputSubVolumes): maskFn = None volFn = vol.get().getFileName() if len(self.symMasks) >= i+1: maskFn = self.symMasks[i].get().getFileName() #Generate mask and apply it to the volume maskVolumeId = self._insertFunctionStep('maskVolume', volFn, maskFn, i, '', prerequisites=[inputStepId]) maskPreprationId = self._insertFunctionStep('prepareObj', i, '', doAlign, 'mask', prerequisites=[maskVolumeId]) volPreparationId = self._insertFunctionStep('prepareObj', i, '', doAlign, 'volume', prerequisites=[maskVolumeId]) depsSymVol.append(volPreparationId) depsSymMask.append(maskPreprationId) genAsymUnitId = self._insertFunctionStep('genAsymUnit','', prerequisites=depsSymVol + depsSymMask) symMaskStepId = self._insertFunctionStep('symmetrizeObj', localRecSym, '', 'mask', prerequisites=[genAsymUnitId]) symVolStepId = self._insertFunctionStep('symmetrizeObj', localRecSym, '', 'volume', prerequisites=[genAsymUnitId]) stitchStepId = self._insertFunctionStep('stitchParticles', '', prerequisites=[symMaskStepId, symVolStepId]) self._insertFunctionStep('createOutputStep', prerequisites=[stitchStepId]) #--------------------------- STEPS functions -------------------------------
[docs] def convertInputStep(self): # Read voxel size if self.useHalMaps: self.pxSize = self.inputSubVolumesHalf1[0].get().getSamplingRate() else: self.pxSize = self.inputSubVolumes[0].get().getSamplingRate() interpMethod = self.interpMethod self.interpString = 'linear' if interpMethod.get() == LINEAR else 'spline' self.interpNum = 1 if interpMethod.get() == LINEAR else 3 self.subVolCenterVec = [] """ Compute the center of the sub-particle (the same as the vector for localized coordinate extraction)""" if self.usePreRun: for i, run in enumerate(self.preRuns): self.subVolCenterVec += self.createVector(self.preRuns[i].get()) else: self.subVolCenterVec = self.createVector()
[docs] def genAsymUnit(self, halfString): # Create objects to handle images ih = ImageHandler() sumImg = ih.createImage() img = ih.createImage() sumMask = ih.createImage() imgMask = ih.createImage() # Read first mask and volume and add it to sum maskShifted = self._getFileName('mask', 'shifted', 1) volShifted = self._getFileName('volume', 'shifted', 1, halfString) sumImg.convert2DataType(DT_DOUBLE) sumMask.convert2DataType(DT_DOUBLE) # Loop over the halfX subvolumes and sum them up (and mask) if not self.useHalMaps: listObj = self.inputSubVolumes else: listObj = self.inputSubVolumesHalf1 for i, vol in enumerate(listObj): if i==0: continue # Read current volume and mask volShifted = self._getFileName('volume', 'shifted', i+1, halfString) maskShifted = self._getFileName('mask', 'shifted', i+1) img.convert2DataType(DT_DOUBLE) imgMask.convert2DataType(DT_DOUBLE) # Add vol and mask to related sums sumImg.inplaceAdd(img) sumMask.inplaceAdd(imgMask) # Write mask and volume after sum on disk sumMask.write(self._getFileName('mask', 'sum')) sumImg.write(self._getFileName('volume', 'sum', -1, halfString))
[docs] def stitchParticles(self, halfString): # define the required file name to make a proper mask binarizedMaskFn = self._getFileName('mask', 'binarized', -1, halfString) erodedMaskFn = self._getFileName('mask', 'eroded', -1, halfString) softMaskFn = self._getFileName('mask', 'soft_edge', -1, halfString) volWithouMask = self._getFileName('volume', 'without_mask', -1, halfString) outputVol = self._getOutputFileName(halfString) # Read symmetrized volume and mask ih = ImageHandler() maskSymImg = ih.createImage() volSymImg = ih.createImage() finalMask = ih.createImage() volSymFn = self._getFileName('volume', 'symmetrized', -1, halfString) maskSymFn = self._getFileName('mask', 'symmetrized') volSymImg.convert2DataType(DT_DOUBLE) maskSymImg.convert2DataType(DT_DOUBLE) # Here we divide volume by mask maskSymData = maskSymImg.getData() sumMaskDataTmp = maskSymImg.getData() maskSymData[maskSymData<1.0] = 1.0 maskSymImg.setData(maskSymData) volSymImg.inplaceDivide(maskSymImg) volSymImg.write(volWithouMask) # This is to generate a smooth mask sumMaskDataTmp[sumMaskDataTmp < 1.0] = 0.0 sumMaskDataTmp[sumMaskDataTmp >= 1.0] = 1.0 finalMask.setData(sumMaskDataTmp) finalMask.write(binarizedMaskFn) # Apply morphology to mask to then apply softedge program = 'xmipp_transform_morphology' args = '-i %s --size 2.0 -o %s --binaryOperation erosion' % (binarizedMaskFn, erodedMaskFn) self.runJob(program, args) # Apply soft edge to the mask program = 'xmipp_transform_filter' args = '-i %s --fourier real_gaussian 2.0 -o %s' % (erodedMaskFn, softMaskFn) self.runJob(program, args) program = 'xmipp_image_operate' args = '-i %s --mult %s -o %s' % (volWithouMask, softMaskFn, outputVol) self.runJob(program,args)
[docs] def maskVolume(self, volFn, maskFn, index, halfString): ih = ImageHandler() # Check if there is a mask if not then use a spherical mask if maskFn is None: # Compute sphere radius and make a spherical mask maskFn = self._getFileName('mask', index+1) volSize = ih.getDimensions(volFn)[0] radius = volSize/2 - 1 emlib.createEmptyFile(maskFn, volSize, volSize, volSize) program = "xmipp_transform_mask" args = "-i %s --mask circular %d --create_mask %s " % (maskFn, -1 * radius, maskFn) self.runJob(program,args) else: putils.copyFile(maskFn, self._getFileName('mask', index+1)) maskFn = self._getFileName('mask', index+1) # Read the volume if it is provided if volFn.endswith(".mrc"): volFn = volFn + ":mrc" # Apply mask to the volume volMasked = self._getFileName('volume', 'masked', index+1, halfString); program = 'xmipp_image_operate' args = '-i %s --mult %s -o %s' % (volFn, maskFn, volMasked) self.runJob(program, args)
[docs] def prepareObj(self, index, halfString, doAlign, objType): shiftX, shiftY, shiftZ, rotMatrix = self.readVector(index) rot, tilt, psi = np.rad2deg(euler_from_matrix(rotMatrix.transpose(), 'szyz')) # Window the sub-volume to the output volume size objWin = self._getFileName(objType, 'windowed', index+1, halfString) if objType == 'mask': objMasked = self._getFileName('mask', index+1) else: objMasked = self._getFileName(objType, 'masked', index+1, halfString) program = 'xmipp_transform_window' args = '-i %s --size %d -o %s' % (objMasked, self.outDim, objWin) self.runJob(program,args) # If sub-particles are aligned along z if doAlign: program = 'xmipp_transform_geometry' args = '-i %s --rotate_volume euler %f %f %f -o %s' \ % (objWin, rot, tilt, psi, objWin) self.runJob(program,args) # Shift the sub-volume to its center in the volume objShifted = self._getFileName(objType, 'shifted', index+1, halfString) program = 'xmipp_transform_geometry' args = ('-i %s --shift %f %f %f -o %s --dont_wrap --interp %s' % (objWin, shiftX, shiftY, shiftZ, objShifted, self.interpString)) self.runJob(program,args)
[docs] def symmetrizeObj(self, localRecSym, halfString, objType): # Apply symmetry operation to the volume objSum = self._getFileName(objType, 'sum', -1, halfString) objSym = self._getFileName(objType, 'symmetrized', -1, halfString) program = 'xmipp_transform_symmetrize' args = '-i %s --sym %s -o %s --dont_wrap --sum --spline %d' % (objSum, localRecSym, objSym, self.interpNum) self.runJob(program,args)
[docs] def readVector(self, index): length = self.subVolCenterVec[index].get_length() [shiftX, shiftY, shiftZ] = [x * length for x in self.subVolCenterVec[index].vector] rotMatrix = self.subVolCenterVec[index].get_matrix() return shiftX, shiftY, shiftZ, rotMatrix
[docs] def createVector(self, protocolSitich=None): vector = "" cmmFn = "" if protocolSitich is None: protocolSitich = self if protocolSitich.defineVector == CMM: cmmFn = protocolSitich.vectorFile.get() else: vector = protocolSitich.vector.get() return load_vectors(cmmFn, vector, protocolSitich.length.get(), self.pxSize)
[docs] def createOutputStep(self): if self.useHalMaps: vol = self.inputSubVolumesHalf1[0] volumes = self._createSetOfVolumes() volumes.setSamplingRate(self.pxSize) for halfString in ['half1', 'half2']: outVol = Volume() outputVolFn = self._getOutputFileName(halfString) outVol.setFileName(outputVolFn) volumes.append(outVol) self._defineOutputs(outputVolumes=volumes) self._defineSourceRelation(vol, volumes) else: vol = self.inputSubVolumes[0] outVol = Volume() outputVolFn = self._getOutputFileName() outVol.setSamplingRate(self.pxSize) outVol.setFileName(outputVolFn) self._defineOutputs(outputVolume=outVol) self._defineSourceRelation(vol,outVol)
#--------------------------- INFO functions -------------------------------- def _validate(self): validateMsgs = [] if self.useHalMaps: if len(self.inputSubVolumesHalf1) != len(self.inputSubVolumesHalf2): validateMsgs.append("The number of sub-volumes for" "half1 and half2 must be equal") listObj = self.inputSubVolumesHalf1 else: listObj = self.inputSubVolumes if len(listObj)>1: pxSize = listObj[0].get().getSamplingRate() for i, vol in enumerate(listObj): if i==0: continue if pxSize != vol.get().getSamplingRate(): validateMsgs.append("The sampling rate of Volumes" " *MUST BE EQUAL*") if self.usePreRun: if len(listObj) != len(self.preRuns): validateMsgs.append("You must assign each sub-volume" " a previous run of localrec") return validateMsgs def _citations(self): return ['Ilca2015', 'Abrishami2020'] def _summary(self): listObj = self.inputSubVolumesHalf1 if not self.useHalMaps: listObj = self.inputSubVolumes summary = ["Stitch %d sub-volumes to make a full volume of size %d" % (len(listObj), self.outDim)] return summary def _methods(self): messages = [] return messages #--------------------------- UTILS functions ------------------------------- def _getFileName(self, imgType, desc='', index=-1, halfString=''): auxString = '' if halfString == '' else '_{}'.format(halfString) auxString2 = '' if index == -1 else '_{}'.format(index) auxString3 = '' if desc == '' else '_{}'.format(desc) return self._getTmpPath('output_%s%s%s%s.vol' % (imgType, auxString3, auxString2, auxString)) def _getOutputFileName(self, halfString=''): auxString = '' if halfString == '' else '_{}'.format(halfString) return self._getExtraPath('output_volume%s.vol' % auxString)