def make_spp_depthwise_separable_last_layers(x,
num_filters,
out_filters,
block_id_str=None,
predict_filters=None,
predict_id='1'):
'''6 Conv2D_BN_Leaky layers followed by a Conv2D_linear layer'''
if not block_id_str:
block_id_str = str(K.get_uid())
x = compose(
DarknetConv2D_BN_Leaky(num_filters, (1, 1)),
Depthwise_Separable_Conv2D_BN_Leaky(filters=num_filters * 2,
kernel_size=(3, 3),
block_id_str=block_id_str + '_1'),
DarknetConv2D_BN_Leaky(num_filters, (1, 1)))(x)
x = Spp_Conv2D_BN_Leaky(x, num_filters)
x = compose(
Depthwise_Separable_Conv2D_BN_Leaky(filters=num_filters * 2,
kernel_size=(3, 3),
block_id_str=block_id_str + '_2'),
DarknetConv2D_BN_Leaky(num_filters, (1, 1)))(x)
if predict_filters is None:
predict_filters = num_filters * 2
y = compose(
Depthwise_Separable_Conv2D_BN_Leaky(filters=predict_filters,
kernel_size=(3, 3),
block_id_str=block_id_str + '_3'),
DarknetConv2D(out_filters, (1, 1),
name='predict_conv_' + predict_id))(x)
return x, y
def Depthwise_Conv2D_BN_Leaky(kernel_size=(3, 3), block_id_str=None):
"""Depthwise Convolution2D."""
if not block_id_str:
block_id_str = str(K.get_uid())
return compose(
DepthwiseConv2D(kernel_size, padding='same', name='conv_dw_' + block_id_str),
BatchNormalization(name='conv_dw_%s_bn' % block_id_str),
LeakyReLU(alpha=0.1, name='conv_dw_%s_leaky_relu' % block_id_str)
)
def __init__(self, **kwargs):
super(SwitchLayer, self).__init__(**kwargs)
self.switch = self.add_weight(
'switch_' + str(K.get_uid('switch')),
shape=(),
initializer=tf.constant_initializer(2), # we add a big initializer
# to take into account the adjacent scales by default
# but not too big because we want to have some gradient flowing
)
def __init__(self,
shape,
my_initializer='RandomNormal',
dtype=None,
name=None,
mult=1.0,
**kwargs):
# some input checking
if not name:
prefix = 'local_param'
name = prefix + '_' + str(backend.get_uid(prefix))
if not dtype:
dtype = backend.floatx()
self.shape = [1, *shape]
self.my_initializer = my_initializer
self.mult = mult
if not name:
prefix = 'param'
name = '%s_%d' % (prefix, K.get_uid(prefix))
Layer.__init__(self, name=name, **kwargs)
# Create a trainable weight variable for this layer.
with K.name_scope(self.name):
self.kernel = self.add_weight(name='kernel',
shape=shape,
initializer=self.my_initializer,
dtype=dtype,
trainable=True)
# prepare output tensor, which is essentially the kernel.
output_tensor = K.expand_dims(self.kernel, 0) * self.mult
output_tensor._keras_shape = self.shape
output_tensor._uses_learning_phase = False
output_tensor._keras_history = base_layer.KerasHistory(self, 0, 0)
output_tensor._batch_input_shape = self.shape
self.trainable = True
self.built = True
self.is_placeholder = False
# create new node
Node(self,
inbound_layers=[],
node_indices=[],
tensor_indices=[],
input_tensors=[],
output_tensors=[output_tensor],
input_masks=[],
output_masks=[None],
input_shapes=[],
output_shapes=self.shape)
def Depthwise_Separable_Conv2D_BN_Leaky(filters, kernel_size=(3, 3), block_id_str=None):
"""Depthwise Separable Convolution2D."""
if not block_id_str:
block_id_str = str(K.get_uid())
return compose(
YoloDepthwiseConv2D(kernel_size, padding='same', name='conv_dw_' + block_id_str),
CustomBatchNormalization(name='conv_dw_%s_bn' % block_id_str),
LeakyReLU(alpha=0.1, name='conv_dw_%s_leaky_relu' % block_id_str),
YoloConv2D(filters, (1,1), padding='same', use_bias=False, strides=(1, 1), name='conv_pw_%s' % block_id_str),
CustomBatchNormalization(name='conv_pw_%s_bn' % block_id_str),
LeakyReLU(alpha=0.1, name='conv_pw_%s_leaky_relu' % block_id_str))
def make_yolo_depthwise_separable_head(x, num_filters, block_id_str=None):
'''6 Conv2D_BN_Leaky layers followed by a Conv2D_linear layer'''
if not block_id_str:
block_id_str = str(K.get_uid())
x = compose(
DarknetConv2D_BN_Leaky(num_filters, (1,1)),
Depthwise_Separable_Conv2D_BN_Leaky(filters=num_filters*2, kernel_size=(3, 3), block_id_str=block_id_str+'_1'),
DarknetConv2D_BN_Leaky(num_filters, (1,1)),
Depthwise_Separable_Conv2D_BN_Leaky(filters=num_filters*2, kernel_size=(3, 3), block_id_str=block_id_str+'_2'),
DarknetConv2D_BN_Leaky(num_filters, (1,1)))(x)
return x
def __init__(
self,
input_shape=None,
batch_size=None,
dtype=None,
input_tensor=None,
sparse=False,
name=None,
**kwargs,
):
if "batch_input_shape" in kwargs:
batch_input_shape = kwargs.pop("batch_input_shape")
if input_shape and batch_input_shape:
raise ValueError(
"Only provide the input_shape OR "
"batch_input_shape argument to "
"InputLayer, not both at the same time."
)
batch_size = batch_input_shape[0]
input_shape = batch_input_shape[1:]
if kwargs:
raise ValueError("Unrecognized keyword arguments:", kwargs.keys())
if not name:
prefix = "input"
name = prefix + "_" + str(backend.get_uid(prefix))
if batch_size is None:
raise NotImplementedError()
if input_tensor is not None:
raise NotImplementedError()
if dtype is not None:
raise NotImplementedError()
if sparse:
raise NotImplementedError()
super(InputLayer, self).__init__()
self.built = True
self.batch_size = batch_size
if isinstance(input_shape, tensor_shape.TensorShape):
input_shape = tuple(input_shape.as_list())
elif isinstance(input_shape, int):
input_shape = (input_shape,)
if input_shape is not None:
self._batch_input_shape = (batch_size,) + tuple(input_shape)
else:
raise ValueError("Input shape must be defined for the first layer.")
# Create a graph placeholder to call the layer on.
self.placeholder = tfe.define_private_placeholder(self._batch_input_shape)
def Darknet_Depthwise_Separable_Conv2D_BN_Leaky(filters, kernel_size=(3, 3), block_id_str=None, **kwargs):
"""Depthwise Separable Convolution2D."""
if not block_id_str:
block_id_str = str(K.get_uid())
no_bias_kwargs = {'use_bias': False}
no_bias_kwargs.update(kwargs)
return compose(
DarknetDepthwiseConv2D(kernel_size, name='conv_dw_' + block_id_str, **no_bias_kwargs),
BatchNormalization(name='conv_dw_%s_bn' % block_id_str),
LeakyReLU(alpha=0.1, name='conv_dw_%s_leaky_relu' % block_id_str),
Conv2D(filters, (1,1), padding='same', use_bias=False, strides=(1, 1), name='conv_pw_%s' % block_id_str),
BatchNormalization(name='conv_pw_%s_bn' % block_id_str),
LeakyReLU(alpha=0.1, name='conv_pw_%s_leaky_relu' % block_id_str))
def Darknet_Depthwise_Separable_Conv2D_BN_Swish(filters, kernel_size=(3, 3), block_id_str=None, **kwargs):
"""Depthwise Separable Convolution2D."""
if not block_id_str:
block_id_str = str(K.get_uid())
no_bias_kwargs = {'use_bias': False}
no_bias_kwargs.update(kwargs)
return compose(
DarknetDepthwiseConv2D(kernel_size, name='conv_dw_' + block_id_str, **no_bias_kwargs),
CustomBatchNormalization(name='conv_dw_%s_bn' % block_id_str),
Activation(swish, name='conv_dw_%s_swish' % block_id_str),
YoloConv2D(filters, (1,1), padding='same', use_bias=False, strides=(1, 1), name='conv_pw_%s' % block_id_str),
CustomBatchNormalization(name='conv_pw_%s_bn' % block_id_str),
Activation(swish, name='conv_pw_%s_swish' % block_id_str))
def __init__(self,
input_shape=None,
batch_input_shape=None,
input_dtype=None,
sparse=False,
name=None):
self.input_spec = None
self.supports_masking = False
self.uses_learning_phase = False
self.trainable = False
self.built = True
self.inbound_nodes_list = []
self.outbound_nodes_list = []
self.trainable_weights_list = []
self.non_trainable_weights_list = []
self.constraints_dict = {}
self.sparse = sparse
if not name:
prefix = 'input'
name = prefix + '_' + str(K.get_uid(prefix))
self.name_new = name
if not batch_input_shape:
assert input_shape, 'An Input layer should be passed either a `batch_input_shape` or an `input_shape`.'
batch_input_shape = (None, ) + tuple(input_shape)
else:
batch_input_shape = tuple(batch_input_shape)
if not input_dtype:
input_dtype = K.floatx()
self.batch_input_shape = batch_input_shape
self.input_dtype = input_dtype
input_tensor = K.placeholder(shape=batch_input_shape,
dtype=input_dtype,
sparse=self.sparse,
name=self.name_new)
input_tensor._uses_learning_phase = False
input_tensor._keras_history = (self, 0, 0)
shape = input_tensor._keras_shape
def make_ultralite_last_layers(x, num_filters, out_filters, block_id_str=None, predict_filters=None):
'''3 Conv2D_BN_Leaky layers followed by a Conv2D_linear layer'''
if not block_id_str:
block_id_str = str(K.get_uid())
x = compose(
#DarknetConv2D_BN_Leaky(num_filters, (1,1)),
#Depthwise_Separable_Conv2D_BN_Leaky(filters=num_filters*2, kernel_size=(3, 3), block_id_str=block_id_str+'_1'),
#DarknetConv2D_BN_Leaky(num_filters, (1,1)),
#Depthwise_Separable_Conv2D_BN_Leaky(filters=num_filters*2, kernel_size=(3, 3), block_id_str=block_id_str+'_2'),
#DarknetConv2D_BN_Leaky(num_filters, (1,1))
Depthwise_Conv2D_BN_Leaky(kernel_size=(3, 3), block_id_str=block_id_str+'_1'),
)(x)
if predict_filters is None:
predict_filters = num_filters*2
y = compose(
#Depthwise_Separable_Conv2D_BN_Leaky(filters=predict_filters, kernel_size=(3, 3), block_id_str=block_id_str+'_3'),
Depthwise_Conv2D_BN_Leaky(kernel_size=(3, 3), block_id_str=block_id_str+'_3'),
DarknetConv2D(out_filters, (1,1)))(x)
return x, y
def __init__(self, name=None, **kwargs):
if not name:
prefix = 'optional_input_placeholder'
name = prefix + '_' + str(K.get_uid(prefix))
kwargs['batch_input_shape'] = (2, )
super(_OptionalInputPlaceHolder, self).__init__(**kwargs)
self.tensor = K.zeros(shape=(2, ))
self.tensor._keras_shape = (2, )
self.tensor._uses_learning_phase = False
self.tensor._keras_history = (self, 0, 0)
Node(self,
inbound_layers=[],
node_indices=[],
tensor_indices=[],
input_tensors=[],
output_tensors=[self.tensor],
input_masks=[None],
output_masks=[None],
input_shapes=[],
output_shapes=[(2, )])
self.build((2, ))
def make_csp_yolo_depthwise_separable_head(x, num_filters, block_id_str=None):
'''6 Conv2D_BN_Mish layers followed by a Conv2D_linear layer'''
if not block_id_str:
block_id_str = str(K.get_uid())
x = DarknetConv2D_BN_Mish(num_filters, (1, 1))(x)
res_connection = DarknetConv2D_BN_Mish(num_filters, (1, 1))(x)
x = compose(
DarknetConv2D_BN_Mish(num_filters, (1, 1)),
Depthwise_Separable_Conv2D_BN_Mish(filters=num_filters,
kernel_size=(3, 3),
block_id_str=block_id_str + '_1'),
DarknetConv2D_BN_Mish(num_filters, (1, 1)),
Depthwise_Separable_Conv2D_BN_Mish(filters=num_filters,
kernel_size=(3, 3),
block_id_str=block_id_str +
'_2'))(x)
x = Concatenate()([x, res_connection])
x = DarknetConv2D_BN_Mish(num_filters, (1, 1))(x)
return x