Source code for cistem.protocols.protocol_picking

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# * Authors:     Grigory Sharov ( [1]
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# * [1] MRC Laboratory of Molecular Biology, MRC-LMB
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import os

import pyworkflow.protocol.params as params
from pyworkflow.protocol import STEPS_PARALLEL
from pyworkflow.constants import PROD
import pyworkflow.utils as pwutils
from import Message
from pwem.constants import RELATION_CTF
from pwem.protocols import ProtParticlePickingAuto
from pwem import emlib

from cistem import Plugin
from ..convert import readSetOfCoordinates, writeReferences
from ..constants import *

[docs]class CistemProtFindParticles(ProtParticlePickingAuto): """ Protocol to pick particles (ab-initio or reference-based) using cisTEM. """ _label = 'find particles' _devStatus = PROD def __init__(self, **kwargs): ProtParticlePickingAuto.__init__(self, **kwargs) self.stepsExecutionMode = STEPS_PARALLEL # --------------------------- DEFINE param functions ------------------------ def _defineParams(self, form): ProtParticlePickingAuto._defineParams(self, form) form.addParam('ctfRelations', params.RelationParam, relationName=RELATION_CTF, attributeName='getInputMicrographs', label='CTF estimation', help='Choose some CTF estimation related to the ' 'input micrographs.') form.addParam('pickType', params.EnumParam, default=0, important=True, label='Picking algorithm', choices=['Ab-initio', 'Reference-based'], display=params.EnumParam.DISPLAY_HLIST) form.addParam('inputRefs', params.PointerParam, condition='pickType==1', important=True, pointerClass='SetOfClasses2D, SetOfAverages', label='Input references', help='Provide a set of 2D templates to use in ' 'the search.') form.addParam('maxradius', params.FloatParam, default=120.0, label='Max particle radius (A)', help='In Angstroms, the maximum radius of the ' 'particles to be found. This also determines ' 'the minimum distance between picks.') form.addParam('radius', params.FloatParam, default=80.0, label='Characteristic particle radius (A)', help='In Angstroms, the radius within which most ' 'of the density is enclosed. The template ' 'for picking is a soft-edge disc, where ' 'the edge is 5 pixels wide and this ' 'parameter defines the radius at which ' 'the cosine-edge template reaches 0.5.') form.addParam('threshold', params.FloatParam, default=6.0, label='Threshold peak height', help='Particle coordinates will be defined as ' 'the coordinates of any peak in the search ' 'function which exceeds this threshold. ' 'In numbers of standard deviations ' 'above expected noise variations in ' 'the scoring function. See Sigworth ' '(2004) for definition.') form.addParam('avoidHighVar', params.BooleanParam, default=False, label='Avoid high variance areas', help='Avoid areas with abnormally high local variance. ' 'This can be effective in avoiding edges ' 'of support films or contamination.') form.addParam('ptclWhite', params.BooleanParam, default=False, label='Particles are white on a dark background?') form.addSection(label='Expert options') form.addParam('highRes', params.FloatParam, default=30.0, label='Highest resolution used in picking (A)', help='The template and micrograph will be resampled ' '(by Fourier cropping) to a pixel size of half ' 'the resolution given here. Note that the ' 'information in the corners of the Fourier ' 'transforms (beyond the Nyquist frequency) ' 'remains intact, so that there is some small ' 'risk of bias beyond this resolution.') form.addParam('minDist', params.IntParam, default=0, label='Minimum distance from edges (px)', help='No particle shall be picked closer than ' 'this distance from the edges of the micrograph. ' 'In pixels.') form.addParam('useRadAvg', params.BooleanParam, default=True, condition='pickType==1', label='Use radial averages of templates', help='Say yes if the templates should be ' 'rotationally averaged') form.addParam('rotateRef', params.IntParam, default=0, condition='pickType==1 and not useRadAvg', label='Rotate each template this many times', help='If > 0, each template image will be ' 'rotated this number of times and the ' 'micrograph will be searched for the rotated ' 'template.') form.addParam('avoidLocMean', params.BooleanParam, default=True, label='Avoid areas with abnormal local mean', help='Avoid areas with abnormally low or high ' 'local mean. This can be effective to avoid ' 'picking from, e.g., contaminating ice crystals, ' 'support film.') form.addParam('bgBoxes', params.IntParam, default=30, label='Number of background boxes', help='Number of background areas to use in estimating ' 'the background spectrum. The larger the number ' 'of boxes, the more accurate the estimate should ' 'be, provided that none of the background boxes ' 'contain any particles to be picked.') form.addParam('bgAlgo', params.EnumParam, default=LOW_VARIANCE, choices=['Lowest variance', 'Variance near mode'], display=params.EnumParam.DISPLAY_COMBO, label='Algorithm to find background areas', help='Testing so far suggests that areas of lowest ' 'variance in experimental micrographs should be ' 'used to estimate the background spectrum. ' 'However, when using synthetic micrographs this ' 'can lead to bias in the spectrum estimation ' 'and the alternative (areas with local variances ' 'near the mean of the distribution of local ' 'variances) seems to perform better') self._defineStreamingParams(form) form.addParallelSection(threads=1, mpi=1) # -------------------------- INSERT steps functions ----------------------- def _insertAllSteps(self): self.inputStreaming = self.getInputMicrographs().isStreamOpen() if self.streamingBatchSize > 0 or self.inputStreaming: # If the input is in streaming, follow the base class policy # about inserting new steps and discovery new input/output self.createOutputStep = self._doNothing ProtParticlePickingAuto._insertAllSteps(self) else: # If not in streaming, then we will just insert a single step to # pick all micrographs at once since it is much faster self._insertInitialSteps() self._insertFunctionStep('_pickMicrographStep', self.getInputMicrographs(), *self._getPickArgs()) self._insertFunctionStep('createOutputStep') # Disable streaming functions: self._insertFinalSteps = self._doNothing self._stepsCheck = self._doNothing def _insertInitialSteps(self): """ Convert the input micrographs to mrc. """ inputRefs = self.getInputReferences() refsId = inputRefs.strId() if inputRefs is not None else None convertId = self._insertFunctionStep('convertInputStep', self.getInputMicrographs().strId(), refsId) return [convertId] def _doNothing(self, *args): pass # used to avoid some streaming functions def _loadInputList(self): """ This function is re-implemented in this protocol, because it has a SetOfCTF as input, so for streaming, we only want to report the micrographs for which the CTF is ready. """ micDict, micClose = self._loadMics(self.getInputMicrographs()) ctfDict, ctfClosed = self._loadCTFs(self.ctfRelations.get()) # Keep the micrographs that have CTF # and set the CTF property for those who have it readyMics = dict() for micKey, mic in micDict.items(): if micKey in ctfDict: mic.setCTF(ctfDict[micKey]) readyMics[micKey] = mic # Return the updated micDict and the closed status return readyMics, micClose and ctfClosed # --------------------------- STEPS functions -------------------------------
[docs] def convertInputStep(self, micsId, refsId): """ Match ctf information against the micrographs. """ self.ctfDict = {} if self.ctfRelations.get() is not None: for ctf in self.ctfRelations.get(): self.ctfDict[ctf.getMicrograph().getMicName()] = ctf.clone() ih = emlib.image.ImageHandler() for mic in self.getInputMicrographs(): micName = mic.getFileName() # We convert the input micrographs if they are not .mrc outMic = os.path.join(self._getTmpPath(), pwutils.replaceBaseExt(micName, 'mrc')) if micName.endswith('.mrc'): pwutils.createAbsLink(os.path.abspath(micName), outMic) else: ih.convert(micName, outMic, emlib.DT_FLOAT) if refsId is not None: writeReferences(self.getInputReferences(), self._getExtraPath('references.mrc'))
def _pickMicrograph(self, mic, *args): self._pickMicrographStep([mic], *args) def _pickMicrographList(self, micList, *args): self._pickMicrographStep(micList, *args) def _pickMicrographStep(self, mics, args): """ Main func that runs the picking job. :param mics: micrograph list :param args: programs args """ for mic in mics: micName = mic.getFileName() outMic = os.path.join(self._getTmpPath(), pwutils.replaceBaseExt(micName, 'mrc')) ctf = self.ctfDict[mic.getMicName()] args.update({'micName': outMic, 'logFn': self._getLogFn(mic), 'outStack': self._getStackFn(mic), 'phaseShift': ctf.getPhaseShift() or 0.0, 'defocusU': ctf.getDefocusU(), 'defocusV': ctf.getDefocusV(), 'defocusAngle': ctf.getDefocusAngle() }) if self.pickType == 1: args.update({ 'refsFn': self._getExtraPath('references.mrc'), 'useRadAvg': 'YES' if self.useRadAvg else 'NO', 'rotateRef': self.rotateRef.get(), }) argsStr = self._getArgsStr() cmdArgs = argsStr % args try: self.runJob(self._getProgram(), cmdArgs, env=Plugin.getEnviron()) # Move output coords from tmp to extra pltFn = pwutils.replaceExt(self._getStackFn(mic), 'plt') pwutils.moveFile(pltFn, self._getPltFn(mic)) # Clean tmp folder pwutils.cleanPath(outMic) pwutils.cleanPath(self._getLogFn(mic)) pwutils.cleanPath(self._getStackFn(mic)) except Exception as e: self.error("ERROR: Picking has failed for %s. %s" % ( outMic, self._getErrorFromPickerTxt(mic, e))) def _getErrorFromPickerTxt(self, mic, e): """ Parse output log for errors. :param mic: input mic object :return: the error string """ file = self._getLogFn(mic) with open(file, "r") as fh: for line in fh.readlines(): if line.startswith("Error"): return line.replace("Error:", "") return e
[docs] def createOutputStep(self): """ Read the coordinates and define outputs.""" micSet = self.getInputMicrographs() coordSet = self._createSetOfCoordinates(micSet) self.readCoordsFromMics(self._getExtraPath(), micSet, coordSet) self._defineOutputs(outputCoordinates=coordSet) self._defineSourceRelation(self.inputMicrographs, coordSet)
# --------------------------- INFO functions -------------------------------- def _summary(self): summary = list() summary.append("Number of input micrographs: %d" % self.getInputMicrographs().getSize()) if self.getOutputsSize() > 0: summary.append("Number of particles picked: %d" % self.getCoords().getSize()) summary.append("Particle size: %d" % self.getCoords().getBoxSize()) summary.append("Threshold: %0.2f" % self.threshold) else: summary.append(Message.TEXT_NO_OUTPUT_CO) return summary def _citations(self): return ['Sigworth2004'] def _methods(self): methodsMsgs = [] if self.getInputMicrographs() is not None: methodsMsgs.append("Input micrographs %s of size %d." % (self.getObjectTag(self.getInputMicrographs()), self.getInputMicrographs().getSize())) if self.getOutputsSize() > 0: output = self.getCoords() methodsMsgs.append('%s: User picked %d particles with a particle ' 'size of %d and threshold %0.2f.' % (self.getObjectTag(output), output.getSize(), output.getBoxSize(), self.threshold)) else: methodsMsgs.append(Message.TEXT_NO_OUTPUT_CO) return methodsMsgs # --------------------------- UTILS functions ------------------------------- def _getProgram(self): """ Return program binary. """ return Plugin.getProgram(FIND_PARTICLES_BIN) def _getPickArgs(self): """ Format arguments to call find_particles program. """ inputMics = self.getInputMicrographs() acq = inputMics.getAcquisition() sampling = inputMics.getSamplingRate() self.argsDict = {'samplingRate': sampling, 'voltage': acq.getVoltage(), 'cs': acq.getSphericalAberration(), 'ampContrast': acq.getAmplitudeContrast(), 'templates': 'NO' if self.pickType == 0 else 'YES', 'radius': self.radius.get(), 'maxradius': self.maxradius.get(), 'highRes': self.highRes.get(), 'boxSize': int(self.maxradius.get() / sampling), 'minDist': self.minDist.get(), 'threshold': self.threshold.get(), 'avoidHighVar': 'YES' if self.avoidHighVar else 'NO', 'avoidLocMean': 'YES' if self.avoidLocMean else 'NO', 'algorithm': self.bgAlgo.get(), 'bgBoxes': self.bgBoxes.get(), 'ptclWhite': 'YES' if self.ptclWhite else 'NO' } return [self.argsDict] def _getArgsStr(self): argsStr = """ << eof > %(logFn)s %(micName)s %(samplingRate)f %(voltage)f %(cs)f %(ampContrast)f %(phaseShift)f %(defocusU)f %(defocusV)f %(defocusAngle)f""" if self.pickType == 0: argsStr += """ NO %(radius)f %(maxradius)f %(highRes)f %(outStack)s %(boxSize)d %(minDist)d %(threshold)f %(avoidHighVar)s %(avoidLocMean)s %(algorithm)d %(bgBoxes)d %(ptclWhite)s eof""" else: # ref-based picking argsStr += """ YES %(refsFn)s %(useRadAvg)s""" if self.useRadAvg: argsStr += """ %(maxradius)f %(highRes)f %(outStack)s %(boxSize)d %(minDist)d %(threshold)f %(avoidHighVar)s %(avoidLocMean)s %(algorithm)d %(bgBoxes)d %(ptclWhite)s eof""" else: if self.rotateRef > 0: argsStr += """ YES %(rotateRef)d %(maxradius)f %(highRes)f %(outStack)s %(boxSize)d %(minDist)d %(threshold)f %(avoidHighVar)s %(avoidLocMean)s %(algorithm)d %(bgBoxes)d %(ptclWhite)s eof""" else: argsStr += """ NO %(maxradius)f %(highRes)f %(outStack)s %(boxSize)d %(minDist)d %(threshold)f %(avoidHighVar)s %(avoidLocMean)s %(algorithm)d %(bgBoxes)d %(ptclWhite)s eof""" return argsStr
[docs] def readCoordsFromMics(self, extraDir, micList, coordSet): """ Overwrite base class function. """ if coordSet.getBoxSize() is None: coordSet.setBoxSize(128) readSetOfCoordinates(self._getExtraPath(), micList, coordSet)
def _getMicrographDir(self, mic): """ Return an unique dir name for results of the micrograph. """ return self._getTmpPath('mic_%06d' % mic.getObjId())
[docs] def getInputMicrographs(self): return self.inputMicrographs.get()
def _getLogFn(self, mic): """ Return output log file. """ micName = mic.getFileName() return os.path.join(self._getTmpPath(), pwutils.replaceBaseExt(micName, 'log')) def _getStackFn(self, mic): return self._getTmpPath('mic_%06d.mrc' % mic.getObjId()) def _getPltFn(self, mic): """ Return output plt coords file. """ micName = mic.getFileName() return os.path.join(self._getExtraPath(), pwutils.replaceBaseExt(micName, 'plt'))
[docs] def getInputReferences(self): return self.inputRefs.get() if self.inputRefs.hasValue() else None