Source code for fsc3d.protocols.protocol_3dfsc

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# * Authors:     Grigory Sharov (
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# * MRC Laboratory of Molecular Biology (MRC-LMB)
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import os

import pyworkflow.protocol.params as params
from pwem.protocols import ProtAnalysis3D
from pwem.emlib.image import ImageHandler
from pwem.objects import Volume

from .. import Plugin

[docs]class Prot3DFSC(ProtAnalysis3D): """ Protocol to calculate 3D FSC. 3D FSC is software tool for quantifying directional resolution using 3D Fourier shell correlation volumes. Find more information at """ _label = 'estimate resolution' INPUT_HELP = """ Required input volumes for 3D FSC: 1. First half map of 3D reconstruction. Can be masked or unmasked. 2. Second half map of 3D reconstruction. Can be masked or unmasked. 3. Full map of 3D reconstruction. Can be masked or unmasked, sharpened or unsharpened. """ def __init__(self, **kwargs): ProtAnalysis3D.__init__(self, **kwargs) def _initialize(self): """ This function is mean to be called after the working dir for the protocol have been set. (maybe after recovery from mapper) """ self._createFilenameTemplates() def _createFilenameTemplates(self): """ Centralize how files are called for iterations and references. """ myDict = { 'input_volFn': self._getExtraPath('volume_full.mrc'), 'input_half1Fn': self._getExtraPath('volume_half1.mrc'), 'input_half2Fn': self._getExtraPath('volume_half2.mrc'), 'input_maskFn': self._getExtraPath('mask.mrc'), 'out_histogram': self._getExtraPath('Results_3D-FSC/histogram.png'), 'out_plot3DFSC': self._getExtraPath('Results_3D-FSC/Plots3D-FSC.jpg'), 'out_plotFT': self._getExtraPath('Results_3D-FSC/FTPlot3D-FSC.jpg'), 'out_vol3DFSC': self._getExtraPath('Results_3D-FSC/3D-FSC.mrc'), 'out_vol3DFSC-th': self._getExtraPath('Results_3D-FSC/3D-FSC_Thresholded.mrc'), 'out_vol3DFSC-thbin': self._getExtraPath('Results_3D-FSC/3D-FSC_ThresholdedBinarized.mrc'), 'out_cmdChimera': self._getExtraPath('Results_3D-FSC/Chimera/3DFSCPlot_Chimera.cxc'), 'out_globalFSC': self._getExtraPath('Results_3D-FSC/ResEM3D-FSCOutglobalFSC.csv') } self._updateFilenamesDict(myDict) # --------------------------- DEFINE param functions ---------------------- def _defineParams(self, form): form.addHidden(params.USE_GPU, params.BooleanParam, default=False, label="Use GPU?") form.addHidden(params.GPU_LIST, params.StringParam, default='0', label="Choose GPU ID", help="Each GPU has a unique ID. If you have only " "one GPU, set ID to 0. 3DFSC can use only one GPU.") form.addSection(label='Input') form.addParam('inputVolume', params.PointerParam, pointerClass='Volume', label="Input volume", important=True, help=self.INPUT_HELP) form.addParam('volumeHalf1', params.PointerParam, label="Volume half 1", important=True, pointerClass='Volume', help=self.INPUT_HELP) form.addParam('volumeHalf2', params.PointerParam, pointerClass='Volume', label="Volume half 2", important=True, help=self.INPUT_HELP) form.addParam('applyMask', params.BooleanParam, default=False, label="Mask input volume?", help='If given, it would be used to mask the half maps ' 'during 3DFSC generation and analysis.') form.addParam('maskVolume', params.PointerParam, label="Mask volume", pointerClass='VolumeMask', condition="applyMask", help='Select a volume to apply as a mask.') form.addSection(label='Extra params') form.addParam('dTheta', params.FloatParam, default=20, label='Angle of cone (deg)', help='Angle of cone to be used for 3D FSC sampling in ' 'degrees. Default is 20 degrees.') form.addParam('fscCutoff', params.FloatParam, default=0.143, label='FSC cutoff', help='FSC cutoff criterion. 0.143 is default.') form.addParam('thrSph', params.FloatParam, default=0.5, label='Sphericity threshold', help='Threshold value for 3DFSC volume for calculating ' 'sphericity. 0.5 is default.') form.addParam('hpFilter', params.FloatParam, default=200, label='High-pass filter (A)', help='High-pass filter for thresholding in Angstrom. ' 'Prevents small dips in directional FSCs at low ' 'spatial frequency due to noise from messing up ' 'the thresholding step. Decrease if you see a ' 'huge wedge missing from your thresholded 3DFSC ' 'volume. 200 Angstroms is default.') form.addParam('numThr', params.IntParam, default=1, label='Number of threshold for sphericity', help='Calculate sphericities at different threshold ' 'cutoffs to determine sphericity deviation across ' 'spatial frequencies. This can be useful to ' 'evaluate possible effects of overfitting or ' 'improperly assigned orientations.') # --------------------------- INSERT steps functions ---------------------- def _insertAllSteps(self): # Insert processing steps self._initialize() self._insertFunctionStep('convertInputStep') self._insertFunctionStep('run3DFSCStep') self._insertFunctionStep('createOutputStep') # --------------------------- STEPS functions -----------------------------
[docs] def convertInputStep(self): """ Convert input volumes to .mrc as expected by 3DFSC.""" ih = ImageHandler() ih.convert(self.volumeHalf1.get().getLocation(), self._getFileName('input_half1Fn')) ih.convert(self.volumeHalf2.get().getLocation(), self._getFileName('input_half2Fn')) ih.convert(self.inputVolume.get().getLocation(), self._getFileName('input_volFn')) if self.maskVolume.hasValue(): ih.convert(self.maskVolume.get().getLocation(), self._getFileName('input_maskFn'))
[docs] def run3DFSCStep(self): args = self._getArgs() params = ' '.join(['%s=%s' % (k, str(v)) for k, v in args.items()]) if self.useGpu: params += ' --gpu --gpu_id=%s' % self.gpuList.get() Plugin.runProgram(self, params, cwd=self._getExtraPath()) if not os.path.exists(self._getFileName('out_vol3DFSC')): raise RuntimeError('3D FSC run failed!')
[docs] def createOutputStep(self): if os.path.exists(self._getFileName('out_vol3DFSC')): inputVol = self.inputVolume.get() vol = Volume() vol.setObjLabel('3D FSC') vol.setFileName(self._getFileName('out_vol3DFSC')) vol.setSamplingRate(inputVol.getSamplingRate()) self._defineOutputs(outputVolume=vol) self._defineSourceRelation(self.inputVolume, vol)
# --------------------------- INFO functions ------------------------------ def _summary(self): summary = [] if self.getOutputsSize() > 0: logFn = self.getLogPaths()[0] sph = self.findSphericity(logFn) summary.append('Sphericity: %0.3f ' % sph) else: summary.append("Output is not ready yet.") return summary def _validate(self): errors = [] half1 = self.volumeHalf1.get() half2 = self.volumeHalf2.get() mask = self.maskVolume.get() or None if half1.getSamplingRate() != half2.getSamplingRate(): errors.append('The selected half volumes have not the same pixel ' 'size.') if half1.getXDim() != half2.getXDim(): errors.append('The selected half volumes have not the same ' 'dimensions.') if self.applyMask and (mask.getXDim() != self.inputVolume.get().getXDim()): errors.append('Input volume and the mask have different ' 'dimensions.') return errors # --------------------------- UTILS functions ----------------------------- def _getArgs(self): """ Prepare the args dictionary.""" args = {'--halfmap1': os.path.basename(self._getFileName('input_half1Fn')), '--halfmap2': os.path.basename(self._getFileName('input_half2Fn')), '--fullmap': os.path.basename(self._getFileName('input_volFn')), '--apix': self.inputVolume.get().getSamplingRate(), '--ThreeDFSC': '3D-FSC', '--dthetaInDegrees': self.dTheta.get(), '--FSCCutoff': self.fscCutoff.get(), '--ThresholdForSphericity': self.thrSph.get(), '--HighPassFilter': self.hpFilter.get(), '--numThresholdsForSphericityCalcs': self.numThr.get() } if self.applyMask and self.maskVolume: args.update({'--mask': os.path.basename(self._getFileName('input_maskFn'))}) args.update({'--histogram': os.path.basename(self._getFileName('out_histogram').replace('.png', ''))}) return args
[docs] def findSphericity(self, fn): with open(fn, 'r') as f: sph = 0. for line in f: if 'Sphericity is ' in line: sph = float(line.split()[2]) return sph