code: def volume_segmentation():
      segmentation = numpy.reshape(numpy.arange(256), (16, 16))
  
      segmentation = numpy.tile(segmentation, (3, 1))
  
      segmentation = numpy.reshape(segmentation, (3, 16, 16))
  
      return segmentation
  
imports: import numpy
  import pytest
  import scipy.sparse.coo
  import cellprofiler_core.image
  import cellprofiler_core.measurement
  import cellprofiler_core.module
  import cellprofiler.modules.convertobjectstoimage
  import cellprofiler_core.object
  import cellprofiler_core.pipeline
  import cellprofiler_core.preferences
  import cellprofiler_core.workspace
label_desc: Use image node_id 4 for calling a global function with example usage: volume_segmentation() and returns: segmentation