def test_network_creation(self, input_size, filter_size_scale, block_repeats, resample_alpha, endpoints_num_filters): """Test creation of SpineNet models.""" min_level = 3 max_level = 7 tf.keras.backend.set_image_data_format('channels_last') input_specs = tf.keras.layers.InputSpec( shape=[None, input_size, input_size, 3]) model = spinenet.SpineNet( input_specs=input_specs, min_level=min_level, max_level=max_level, endpoints_num_filters=endpoints_num_filters, resample_alpha=resample_alpha, block_repeats=block_repeats, filter_size_scale=filter_size_scale, ) inputs = tf.keras.Input(shape=(input_size, input_size, 3), batch_size=1) endpoints = model(inputs) for l in range(min_level, max_level + 1): self.assertIn(str(l), endpoints.keys()) self.assertAllEqual([ 1, input_size / 2**l, input_size / 2**l, endpoints_num_filters ], endpoints[str(l)].shape.as_list())
def test_serialize_deserialize(self): # Create a network object that sets all of its config options. kwargs = dict( min_level=3, max_level=7, endpoints_num_filters=256, resample_alpha=0.5, block_repeats=1, filter_size_scale=1.0, use_sync_bn=False, activation='relu', norm_momentum=0.99, norm_epsilon=0.001, kernel_initializer='VarianceScaling', kernel_regularizer=None, bias_regularizer=None, ) network = spinenet.SpineNet(**kwargs) expected_config = dict(kwargs) self.assertEqual(network.get_config(), expected_config) # Create another network object from the first object's config. new_network = spinenet.SpineNet.from_config(network.get_config()) # Validate that the config can be forced to JSON. _ = new_network.to_json() # If the serialization was successful, the new config should match the old. self.assertAllEqual(network.get_config(), new_network.get_config())
def build_spinenet(input_size): tf.keras.backend.set_image_data_format('channels_last') input_specs = tf.keras.layers.InputSpec( shape=[None, input_size[0], input_size[1], 3]) model = spinenet.SpineNet(input_specs=input_specs, min_level=3, max_level=7, endpoints_num_filters=384, resample_alpha=1.0, block_repeats=2, filter_size_scale=0.5) return model