def build(region_similarity_calculator_config):
"""Builds region similarity calculator based on the configuration.
Builds one of [IouSimilarity, IoaSimilarity, NegSqDistSimilarity] objects. See
core/region_similarity_calculator.proto for details.
Args:
region_similarity_calculator_config: RegionSimilarityCalculator
configuration proto.
Returns:
region_similarity_calculator: RegionSimilarityCalculator object.
Raises:
ValueError: On unknown region similarity calculator.
"""
if not isinstance(
region_similarity_calculator_config,
region_similarity_calculator_pb2.RegionSimilarityCalculator):
raise ValueError(
'region_similarity_calculator_config not of type '
'region_similarity_calculator_pb2.RegionsSimilarityCalculator')
similarity_calculator = region_similarity_calculator_config.WhichOneof(
'region_similarity')
if similarity_calculator == 'iou_similarity':
return region_similarity_calculator.IouSimilarity()
if similarity_calculator == 'ioa_similarity':
return region_similarity_calculator.IoaSimilarity()
if similarity_calculator == 'neg_sq_dist_similarity':
return region_similarity_calculator.NegSqDistSimilarity()
raise ValueError('Unknown region similarity calculator.')
def test_get_correct_pairwise_similarity_based_on_ioa(self):
corners1 = tf.constant([[4.0, 3.0, 7.0, 5.0], [5.0, 6.0, 10.0, 7.0]])
corners2 = tf.constant([[3.0, 4.0, 6.0, 8.0], [14.0, 14.0, 15.0, 15.0],
[0.0, 0.0, 20.0, 20.0]])
exp_output_1 = [[2.0 / 12.0, 0, 6.0 / 400.0],
[1.0 / 12.0, 0.0, 5.0 / 400.0]]
exp_output_2 = [[2.0 / 6.0, 1.0 / 5.0], [0, 0], [6.0 / 6.0, 5.0 / 5.0]]
boxes1 = box_list.BoxList(corners1)
boxes2 = box_list.BoxList(corners2)
ioa_similarity_calculator = region_similarity_calculator.IoaSimilarity(
)
ioa_similarity_1 = ioa_similarity_calculator.compare(boxes1, boxes2)
ioa_similarity_2 = ioa_similarity_calculator.compare(boxes2, boxes1)
with self.test_session() as sess:
iou_output_1, iou_output_2 = sess.run(
[ioa_similarity_1, ioa_similarity_2])
self.assertAllClose(iou_output_1, exp_output_1)
self.assertAllClose(iou_output_2, exp_output_2)