def test_builder(self, backbone_type, input_size, has_att_heads):
num_classes = 2
input_specs = tf.keras.layers.InputSpec(
shape=[None, input_size[0], input_size[1], 3])
if has_att_heads:
attribute_heads_config = [
retinanet_cfg.AttributeHead(name='att1'),
retinanet_cfg.AttributeHead(name='att2',
type='classification',
size=2),
]
else:
attribute_heads_config = None
model_config = retinanet_cfg.RetinaNet(
num_classes=num_classes,
backbone=backbones.Backbone(type=backbone_type),
head=retinanet_cfg.RetinaNetHead(
attribute_heads=attribute_heads_config))
l2_regularizer = tf.keras.regularizers.l2(5e-5)
_ = factory.build_retinanet(input_specs=input_specs,
model_config=model_config,
l2_regularizer=l2_regularizer)
if has_att_heads:
self.assertEqual(model_config.head.attribute_heads[0].as_dict(),
dict(name='att1', type='regression', size=1))
self.assertEqual(model_config.head.attribute_heads[1].as_dict(),
dict(name='att2', type='classification', size=2))
def build_model(self):
"""Build RetinaNet model."""
input_specs = tf.keras.layers.InputSpec(
shape=[None] + self.task_config.model.input_size)
l2_weight_decay = self.task_config.losses.l2_weight_decay
# Divide weight decay by 2.0 to match the implementation of tf.nn.l2_loss.
# (https://www.tensorflow.org/api_docs/python/tf/keras/regularizers/l2)
# (https://www.tensorflow.org/api_docs/python/tf/nn/l2_loss)
l2_regularizer = (tf.keras.regularizers.l2(l2_weight_decay / 2.0)
if l2_weight_decay else None)
model = factory.build_retinanet(input_specs=input_specs,
model_config=self.task_config.model,
l2_regularizer=l2_regularizer)
return model
def _build_model(self):
if self._batch_size is None:
raise ValueError('batch_size cannot be None for detection models.')
input_specs = tf.keras.layers.InputSpec(shape=[self._batch_size] +
self._input_image_size + [3])
if isinstance(self.params.task.model, configs.maskrcnn.MaskRCNN):
model = factory.build_maskrcnn(
input_specs=input_specs, model_config=self.params.task.model)
elif isinstance(self.params.task.model, configs.retinanet.RetinaNet):
model = factory.build_retinanet(
input_specs=input_specs, model_config=self.params.task.model)
else:
raise ValueError('Detection module not implemented for {} model.'.format(
type(self.params.task.model)))
return model
def test_builder(self, backbone_type, input_size, has_attribute_heads):
num_classes = 2
input_specs = tf.keras.layers.InputSpec(
shape=[None, input_size[0], input_size[1], 3])
if has_attribute_heads:
attribute_heads_config = [
retinanet_cfg.AttributeHead(name='att1'),
retinanet_cfg.AttributeHead(name='att2',
type='classification',
size=2),
]
else:
attribute_heads_config = None
model_config = retinanet_cfg.RetinaNet(
num_classes=num_classes,
backbone=backbones.Backbone(
type=backbone_type,
spinenet_mobile=backbones.SpineNetMobile(
model_id='49',
stochastic_depth_drop_rate=0.2,
min_level=3,
max_level=7,
use_keras_upsampling_2d=True)),
head=retinanet_cfg.RetinaNetHead(
attribute_heads=attribute_heads_config))
l2_regularizer = tf.keras.regularizers.l2(5e-5)
quantization_config = common.Quantization()
model = factory.build_retinanet(input_specs=input_specs,
model_config=model_config,
l2_regularizer=l2_regularizer)
_ = qat_factory.build_qat_retinanet(model=model,
quantization=quantization_config,
model_config=model_config)
if has_attribute_heads:
self.assertEqual(model_config.head.attribute_heads[0].as_dict(),
dict(name='att1', type='regression', size=1))
self.assertEqual(model_config.head.attribute_heads[1].as_dict(),
dict(name='att2', type='classification', size=2))
def _build_model(self):
if self._batch_size is None:
# Only batched NMS is supported with dynamic batch size.
self.params.task.model.detection_generator.nms_version = 'batched'
logging.info(
'nms_version is set to `batched` because only batched NMS is '
'supported with dynamic batch size.')
input_specs = tf.keras.layers.InputSpec(shape=[self._batch_size] +
self._input_image_size + [3])
if isinstance(self.params.task.model, configs.maskrcnn.MaskRCNN):
model = factory.build_maskrcnn(input_specs=input_specs,
model_config=self.params.task.model)
elif isinstance(self.params.task.model, configs.retinanet.RetinaNet):
model = factory.build_retinanet(
input_specs=input_specs, model_config=self.params.task.model)
else:
raise ValueError(
'Detection module not implemented for {} model.'.format(
type(self.params.task.model)))
return model
def test_builder(self, backbone_type, decoder_type, input_size,
quantize_detection_head, quantize_detection_decoder):
num_classes = 2
input_specs = tf.keras.layers.InputSpec(
shape=[None, input_size[0], input_size[1], 3])
if backbone_type == 'spinenet_mobile':
backbone_config = backbones.Backbone(
type=backbone_type,
spinenet_mobile=backbones.SpineNetMobile(
model_id='49',
stochastic_depth_drop_rate=0.2,
min_level=3,
max_level=7,
use_keras_upsampling_2d=True))
elif backbone_type == 'mobilenet':
backbone_config = backbones.Backbone(type=backbone_type,
mobilenet=backbones.MobileNet(
model_id='MobileNetV2',
filter_size_scale=1.0))
else:
raise ValueError(
'backbone_type {} is not supported'.format(backbone_type))
if decoder_type == 'identity':
decoder_config = decoders.Decoder(type=decoder_type)
elif decoder_type == 'fpn':
decoder_config = decoders.Decoder(type=decoder_type,
fpn=decoders.FPN(
num_filters=128,
use_separable_conv=True,
use_keras_layer=True))
else:
raise ValueError(
'decoder_type {} is not supported'.format(decoder_type))
model_config = retinanet_cfg.RetinaNet(
num_classes=num_classes,
input_size=[input_size[0], input_size[1], 3],
backbone=backbone_config,
decoder=decoder_config,
head=retinanet_cfg.RetinaNetHead(attribute_heads=None,
use_separable_conv=True))
l2_regularizer = tf.keras.regularizers.l2(5e-5)
# Build the original float32 retinanet model.
model = factory.build_retinanet(input_specs=input_specs,
model_config=model_config,
l2_regularizer=l2_regularizer)
# Call the model with dummy input to build the head part.
dummpy_input = tf.zeros([1] + model_config.input_size)
model(dummpy_input, training=True)
# Build the QAT model from the original model with quantization config.
qat_model = qat_factory.build_qat_retinanet(
model=model,
quantization=common.Quantization(
quantize_detection_decoder=quantize_detection_decoder,
quantize_detection_head=quantize_detection_head),
model_config=model_config)
if quantize_detection_head:
# head become a RetinaNetHeadQuantized when we apply quantization.
self.assertIsInstance(
qat_model.head,
qat_dense_prediction_heads.RetinaNetHeadQuantized)
else:
# head is a RetinaNetHead if we don't apply quantization on head part.
self.assertIsInstance(qat_model.head,
dense_prediction_heads.RetinaNetHead)
self.assertNotIsInstance(
qat_model.head,
qat_dense_prediction_heads.RetinaNetHeadQuantized)
if decoder_type == 'FPN':
if quantize_detection_decoder:
# FPN decoder become a general keras functional model after applying
# quantization.
self.assertNotIsInstance(qat_model.decoder, fpn.FPN)
else:
self.assertIsInstance(qat_model.decoder, fpn.FPN)