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classify_pixel.py
executable file
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classify_pixel.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# #########################################################################
# Copyright (c) 2015, UChicago Argonne, LLC. All rights reserved. #
# #
# Copyright 2015. UChicago Argonne, LLC. This software was produced #
# under U.S. Government contract DE-AC02-06CH11357 for Argonne National #
# Laboratory (ANL), which is operated by UChicago Argonne, LLC for the #
# U.S. Department of Energy. The U.S. Government has rights to use, #
# reproduce, and distribute this software. NEITHER THE GOVERNMENT NOR #
# UChicago Argonne, LLC MAKES ANY WARRANTY, EXPRESS OR IMPLIED, OR #
# ASSUMES ANY LIABILITY FOR THE USE OF THIS SOFTWARE. If software is #
# modified to produce derivative works, such modified software should #
# be clearly marked, so as not to confuse it with the version available #
# from ANL. #
# #
# Additionally, redistribution and use in source and binary forms, with #
# or without modification, are permitted provided that the following #
# conditions are met: #
# #
# * Redistributions of source code must retain the above copyright #
# notice, this list of conditions and the following disclaimer. #
# #
# * Redistributions in binary form must reproduce the above copyright #
# notice, this list of conditions and the following disclaimer in #
# the documentation and/or other materials provided with the #
# distribution. #
# #
# * Neither the name of UChicago Argonne, LLC, Argonne National #
# Laboratory, ANL, the U.S. Government, nor the names of its #
# contributors may be used to endorse or promote products derived #
# from this software without specific prior written permission. #
# #
# THIS SOFTWARE IS PROVIDED BY UChicago Argonne, LLC AND CONTRIBUTORS #
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT #
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS #
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL UChicago #
# Argonne, LLC OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, #
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# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; #
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# #########################################################################
'''
Interface module to Ilastik pixel classifier to create probability maps for a given dataset and training data.
'''
from __future__ import (absolute_import, division, print_function, unicode_literals)
import numpy as np
import six
import pdb
from collections import OrderedDict
import vigra
import os
import ilastik_main
from ilastik.applets.dataSelection import DatasetInfo
from ilastik.workflows.pixelClassification import PixelClassificationWorkflow
def classify_pixel(input_data, classifier, threads, ram):
"""
Interface function to Ilastik object classifier functions.
Runs a pre-trained ilastik classifier on a volume of data
Adapted from Stuart Berg's example here:
https://github.com/ilastik/ilastik/blob/master/examples/example_python_client.py
Arguments:
input_data: data to be classified - 3D numpy array
classifier: ilastik trained/classified file
threads: number of thread to use for classifying input data
ram: RAM to use in MB
Returns:
pixel_out: The probability maps for the classified pixels
"""
# Before we start ilastik, prepare these environment variable settings.
os.environ["LAZYFLOW_THREADS"] = str(threads)
os.environ["LAZYFLOW_TOTAL_RAM_MB"] = str(ram)
# Set the command-line arguments directly into argparse.Namespace object
# Provide your project file, and don't forget to specify headless.
args = ilastik_main.parser.parse_args([])
args.headless = True
args.project = classifier
# Instantiate the 'shell', (an instance of ilastik.shell.HeadlessShell)
# This also loads the project file into shell.projectManager
shell = ilastik_main.main(args)
assert isinstance(shell.workflow, PixelClassificationWorkflow)
# Obtain the training operator
opPixelClassification = shell.workflow.pcApplet.topLevelOperator
# Sanity checks
assert len(opPixelClassification.InputImages) > 0
assert opPixelClassification.Classifier.ready()
# In this example, we're using 3D data (extra dimension for channel).
# Tagging the data ensures that ilastik interprets the axes correctly.
input_data = vigra.taggedView(input_data, 'zyx')
# In case you're curious about which label class is which,
# let's read the label names from the project file.
label_names = opPixelClassification.LabelNames.value
label_colors = opPixelClassification.LabelColors.value
probability_colors = opPixelClassification.PmapColors.value
print("label_names, label_colors, probability_colors", label_names, label_colors, probability_colors)
# Construct an OrderedDict of role-names -> DatasetInfos
# (See PixelClassificationWorkflow.ROLE_NAMES)
role_data_dict = OrderedDict([("Raw Data",
[DatasetInfo(preloaded_array=input_data)])])
# Run the export via the BatchProcessingApplet
# Note: If you don't provide export_to_array, then the results will
# be exported to disk according to project's DataExport settings.
# In that case, run_export() returns None.
predictions = shell.workflow.batchProcessingApplet.\
run_export(role_data_dict, export_to_array=True)
print("predictions.dtype, predictions.shape", predictions[0].dtype, predictions[0].shape)
print("DONE.")
return predictions[0]