import tensorflow as tf

class InstanceSegmentUtilsTest(tf.test.TestCase):

  def get_instance_masks(self):
    mask0 = tf.constant([[0, 0, 0, 0, 0, 0, 0, 0],
                         [0, 0, 0, 0, 0, 0, 0, 0],
                         [0, 0, 0, 0, 0, 0, 0, 0],
