code: def image_labels():
      labels = numpy.zeros((20, 20), dtype=numpy.uint8)
  
      labels[2:8, 2:8] = 1
  
      labels[0:8, 12:18] = 2
  
      labels[12:18, 0:8] = 3
  
      labels[12:20, 12:20] = 4
  
      return labels
  
imports: import numpy
  import numpy.testing
  import pytest
  import cellprofiler_core.image
  import cellprofiler_core.measurement
  from cellprofiler_core.constants.measurement import FF_CHILDREN_COUNT, FF_PARENT
  import cellprofiler.modules.resizeobjects
  import cellprofiler_core.object
label_desc: Use image node_id 1 for calling a global function with example usage: image_labels() and returns: labels