def test_serialize_deserialize(self):
# Create a network object that sets all of its config options.
kwargs = dict(
model_id=50,
output_stride=8,
stem_type='v0',
se_ratio=0.25,
init_stochastic_depth_rate=0.2,
use_sync_bn=False,
activation='relu',
norm_momentum=0.99,
norm_epsilon=0.001,
kernel_initializer='VarianceScaling',
kernel_regularizer=None,
bias_regularizer=None,
)
network = resnet_deeplab.DilatedResNet(**kwargs)
expected_config = dict(kwargs)
self.assertEqual(network.get_config(), expected_config)
# Create another network object from the first object's config.
new_network = resnet_deeplab.DilatedResNet.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 test_network_features(self, stem_type, se_ratio,
init_stochastic_depth_rate, resnetd_shortcut,
replace_stem_max_pool):
"""Test additional features of ResNet models."""
input_size = 128
model_id = 50
endpoint_filter_scale = 4
output_stride = 8
tf.keras.backend.set_image_data_format('channels_last')
network = resnet_deeplab.DilatedResNet(
model_id=model_id,
output_stride=output_stride,
stem_type=stem_type,
resnetd_shortcut=resnetd_shortcut,
replace_stem_max_pool=replace_stem_max_pool,
se_ratio=se_ratio,
init_stochastic_depth_rate=init_stochastic_depth_rate)
inputs = tf.keras.Input(shape=(input_size, input_size, 3),
batch_size=1)
endpoints = network(inputs)
print(endpoints)
self.assertAllEqual([
1, input_size / output_stride, input_size / output_stride,
512 * endpoint_filter_scale
], endpoints[str(int(np.math.log2(output_stride)))].shape.as_list())
def test_sync_bn_multiple_devices(self, strategy, use_sync_bn):
"""Test for sync bn on TPU and GPU devices."""
inputs = np.random.rand(64, 128, 128, 3)
tf.keras.backend.set_image_data_format('channels_last')
with strategy.scope():
network = resnet_deeplab.DilatedResNet(model_id=50,
output_stride=8,
use_sync_bn=use_sync_bn)
_ = network(inputs)
def test_input_specs(self, input_dim):
"""Test different input feature dimensions."""
tf.keras.backend.set_image_data_format('channels_last')
input_specs = tf.keras.layers.InputSpec(
shape=[None, None, None, input_dim])
network = resnet_deeplab.DilatedResNet(model_id=50,
output_stride=8,
input_specs=input_specs)
inputs = tf.keras.Input(shape=(128, 128, input_dim), batch_size=1)
_ = network(inputs)
def test_network_creation(self, input_size, model_id,
endpoint_filter_scale, output_stride):
"""Test creation of ResNet models."""
tf.keras.backend.set_image_data_format('channels_last')
network = resnet_deeplab.DilatedResNet(model_id=model_id,
output_stride=output_stride)
inputs = tf.keras.Input(shape=(input_size, input_size, 3),
batch_size=1)
endpoints = network(inputs)
print(endpoints)
self.assertAllEqual([
1, input_size / output_stride, input_size / output_stride,
512 * endpoint_filter_scale
], endpoints[str(int(np.math.log2(output_stride)))].shape.as_list())