code: def image_segmentation():
      return numpy.reshape(numpy.arange(256), (16, 16))
  
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 3 for calling a global function with example usage: image_segmentation() and returns: numpy