def _build_model(self):
with default_options(init=he_uniform(), activation=relu, bias=True):
model = Sequential([
Convolution((4, 4), 64, strides=(2, 2), name='conv1'),
Convolution((3, 3), 64, strides=(1, 1), name='conv2'),
Dense(512, name='dense1', init=he_normal(0.01)),
Dense(self._nb_actions, activation=None, init=he_normal(0.01), name='qvalues')
])
return model
def _build_model(self):
with default_options(init=he_uniform(), activation=relu, bias=True):
model = Sequential([
Convolution((8, 8), 32, strides=(4, 4)),
Convolution((4, 4), 64, strides=(2, 2)),
Convolution((3, 3), 64, strides=(1, 1)),
Dense(512, init=he_normal(0.01)),
Dense(self._nb_actions, activation=None, init=he_normal(0.01))
])
return model
def _build_model(self):
with default_options(init=he_uniform(), activation=relu, bias=True):
model = Sequential([
Convolution((8, 8), 32, strides=(4, 4)),
Convolution((4, 4), 64, strides=(2, 2)),
Convolution((3, 3), 64, strides=(1, 1)),
Dense(512, init=he_normal(0.01)),
Dense(self._nb_actions, activation=None, init=he_normal(0.01))
])
return model
def _build_model(self):
with default_options(init=he_uniform(), activation=relu, bias=True):
model = Sequential([
Convolution((4, 4), 64, strides=(2, 2), name='conv1'),
Convolution((3, 3), 64, strides=(1, 1), name='conv2'),
Dense(512, name='dense1', init=he_normal(0.01)),
Dense(self._nb_actions,
activation=None,
init=he_normal(0.01),
name='qvalues')
])
return model
def create_transfer_learning_model(input, num_classes, model_file, freeze=False):
base_model = load_model(model_file)
base_model = C.as_composite(base_model[3].owner)
# Load the pretrained classification net and find nodes
feature_node = C.logging.find_by_name(base_model, feature_node_name)
last_node = C.logging.find_by_name(base_model, last_hidden_node_name)
base_model = C.combine([last_node.owner]).clone(C.CloneMethod.freeze if freeze else C.CloneMethod.clone, {feature_node: C.placeholder(name='features')})
base_model = base_model(C.input_variable((num_channels, image_height, image_width)))
r1 = C.logging.find_by_name(base_model, "z.x.x.r")
r2_2 = C.logging.find_by_name(base_model, "z.x.x.x.x.r")
r3_2 = C.logging.find_by_name(base_model, "z.x.x.x.x.x.x.r")
r4_2 = C.logging.find_by_name(base_model, "z.x.x.x.x.x.x.x.x.r")
up_r1 = OneByOneConvAndUpSample(r1, 3, num_classes)
up_r2_2 = OneByOneConvAndUpSample(r2_2, 2, num_classes)
up_r3_2 = OneByOneConvAndUpSample(r3_2, 1, num_classes)
up_r4_2 = OneByOneConvAndUpSample(r4_2, 0, num_classes)
merged = C.splice(up_r1, up_r3_2, up_r2_2, axis=0)
resnet_fcn_out = Convolution((1, 1), num_classes, init=he_normal(), activation=sigmoid, pad=True)(merged)
z = UpSampling2DPower(resnet_fcn_out,2)
return z
def bn_inception_cifar_model(input, labelDim, bnTimeConst):
# 32 x 32 x 3
conv1a = conv_bn_relu_layer(input, 32, (3,3), (1,1), True, bnTimeConst)
# 32 x 32 x 32
conv1b = conv_bn_relu_layer(conv1a, 32, (3,3), (1,1), True, bnTimeConst)
# 32 x 32 x 32
conv2a = conv_bn_relu_layer(conv1b, 64, (3,3), (1,1), True, bnTimeConst)
# 32 x 32 x 64
conv2b = conv_bn_relu_layer(conv2a, 128, (3,3), (1,1), True, bnTimeConst)
# Inception Blocks
# 32 x 32 x 128
inception3a = inception_block_with_maxpool(conv2b, 32, 32, 32, 32, 48, 16, bnTimeConst)
# 32 x 32 x 128
inception3b = inception_block_with_maxpool(inception3a, 32, 32, 32, 32, 48, 16, bnTimeConst)
# 16 x 16 x 128
inception4a = inception_block_with_avgpool(inception3b, 96, 48, 64, 48, 64, 64, bnTimeConst)
# 16 x 16 x 288
inception4b = inception_block_with_avgpool(inception4a, 48, 64, 96, 80, 96, 64, bnTimeConst)
# 16 x 16 x 288
inception4c = inception_block_with_avgpool(inception4b, 48, 64, 96, 80, 96, 64, bnTimeConst)
# 16 x 16 x 288
inception4d = inception_block_pass_through(inception4c, 0, 128, 192, 192, 256, 0, bnTimeConst)
# 8 x 8 x 512
inception5a = inception_block_with_maxpool(inception4d, 176, 96, 160, 96, 112, 64, bnTimeConst)
# Global Average
# 8 x 8 x 512
pool1 = AveragePooling(filter_shape=(8,8))(inception5a)
# 1 x 1 x 512
z = Dense(labelDim, init=he_normal())(pool1)
return z
def conv_bn_relu(input,
filter_size,
num_filters,
strides=(1, 1),
init=he_normal()):
r = conv_bn(input, filter_size, num_filters, strides, init, 1)
return relu(r)
def bn_inception_cifar_model(input, labelDim, bnTimeConst):
# 32 x 32 x 3
conv1a = conv_bn_relu_layer(input, 32, (3,3), (1,1), True, bnTimeConst)
# 32 x 32 x 32
conv1b = conv_bn_relu_layer(conv1a, 32, (3,3), (1,1), True, bnTimeConst)
# 32 x 32 x 32
conv1c = conv_bn_relu_layer(conv1b, 32, (3,3), (1,1), True, bnTimeConst)
# 32 x 32 x 32
conv2a = conv_bn_relu_layer(conv1c, 32, (1,1), (1,1), True, bnTimeConst)
# 32 x 32 x 32
conv2b = conv_bn_relu_layer(conv2a, 64, (3,3), (1,1), True, bnTimeConst)
# Inception Blocks
# 32 x 32 x 64
inception3a = inception_block_with_avgpool(conv2b, 32, 32, 32, 32, 48, 16, bnTimeConst)
# 32 x 32 x 128
inception3b = inception_block_pass_through(inception3a, 0, 64, 80, 32, 48, 0, bnTimeConst)
# 16 x 16 x 256
inception4a = inception_block_with_avgpool(inception3b, 96, 48, 64, 48, 64, 64, bnTimeConst)
# 16 x 16 x 288
inception4b = inception_block_with_avgpool(inception4a, 48, 64, 96, 80, 96, 64, bnTimeConst)
# 16 x 16 x 288
inception4c = inception_block_pass_through(inception4b, 0, 128, 192, 192, 256, 0, bnTimeConst)
# 8 x 8 x 512
inception5a = inception_block_with_maxpool(inception4c, 176, 96, 160, 96, 112, 64, bnTimeConst)
# Global Average
# 8 x 8 x 512
pool1 = AveragePooling(filter_shape=(8,8))(inception5a)
# 1 x 1 x 512
z = Dense(labelDim, init=he_normal())(pool1)
return z
def create_model(input, num_classes):
c_map = [16, 32, 64]
num_stack_layers = 3
conv = conv_bn_relu(input, (3, 3), c_map[0])
r1 = resnet_basic_stack(conv, num_stack_layers, c_map[0])
r2_1 = resnet_basic_inc(r1, c_map[1])
r2_2 = resnet_basic_stack(r2_1, num_stack_layers - 1, c_map[1])
r3_1 = resnet_basic_inc(r2_2, c_map[2])
r3_2 = resnet_basic_stack(r3_1, num_stack_layers - 1, c_map[2])
up_r1 = OneByOneConvAndUpSample(r1, 0, num_classes)
up_r2_2 = OneByOneConvAndUpSample(r2_2, 1, num_classes)
up_r3_2 = OneByOneConvAndUpSample(r3_2, 2, num_classes)
merged = C.splice(up_r1, up_r3_2, up_r2_2, axis=0)
resnet_fcn_out = Convolution((1, 1),
num_classes,
init=he_normal(),
activation=sigmoid,
pad=True)(merged)
return resnet_fcn_out
def conv_bn_layer(input,
out_feature_map_count,
kernel_shape,
strides,
bn_time_const,
b_value=0,
sc_value=1):
num_in_channels = input.shape[0]
kernel_width = kernel_shape[0]
kernel_height = kernel_shape[1]
v_stride = strides[0]
h_stride = strides[1]
#TODO: use RandomNormal to initialize, needs to be exposed in the python api
conv_params = parameter(shape=(out_feature_map_count, num_in_channels,
kernel_height, kernel_width),
init=he_normal())
conv_func = convolution(conv_params, input,
(num_in_channels, v_stride, h_stride))
#TODO: initialize using b_value and sc_value, needs to be exposed in the python api
bias_params = parameter(shape=(out_feature_map_count), init=b_value)
scale_params = parameter(shape=(out_feature_map_count), init=sc_value)
running_mean = constant(0., (out_feature_map_count))
running_invstd = constant(0., (out_feature_map_count))
running_count = constant(0., (1))
return batch_normalization(conv_func,
scale_params,
bias_params,
running_mean,
running_invstd,
running_count=running_count,
spatial=True,
normalization_time_constant=bn_time_const,
use_cudnn_engine=True)
def convolution_bn(input, filter_size, num_filters, strides=(1,1), init=he_normal(), activation=relu):
if activation is None:
activation = lambda x: x
r = Convolution(filter_size, num_filters, strides=strides, init=init, activation=None, pad=True, bias=False)(input)
r = BatchNormalization(map_rank=1)(r)
r = activation(r)
return r
def OneByOneConvAndUpSample(x, k_power, num_channels):
x = Convolution((1, 1),
num_channels,
init=he_normal(),
activation=relu,
pad=True)(x)
x = UpSampling2DPower(x, k_power)
return x
def conv_bn(input, filter_size, num_filters, strides=(1, 1), init=he_normal()):
c = Convolution(filter_size,
num_filters,
activation=None,
init=init,
pad=True,
strides=strides,
bias=False)(input)
r = BatchNormalization(map_rank=1,
normalization_time_constant=4096,
use_cntk_engine=False)(c)
return r
def bn_inception_model(input, labelDim, bnTimeConst):
# 224 x 224 x 3
conv1 = conv_bn_relu_layer(input, 64, (7, 7), (2, 2), True, bnTimeConst)
# 112 x 112 x 64
pool1 = MaxPooling(filter_shape=(3, 3), strides=(2, 2), pad=True)(conv1)
# 56 x 56 x 64
conv2a = conv_bn_relu_layer(pool1, 64, (1, 1), (1, 1), True, bnTimeConst)
# 56 x 56 x 64
conv2b = conv_bn_relu_layer(conv2a, 192, (3, 3), (1, 1), True, bnTimeConst)
# 56 x 56 x 192
pool2 = MaxPooling(filter_shape=(3, 3), strides=(2, 2), pad=True)(conv2b)
# Inception Blocks
# 28 x 28 x 192
inception3a = inception_block_with_avgpool(pool2, 64, 64, 64, 64, 96, 32,
bnTimeConst)
# 28 x 28 x 256
inception3b = inception_block_with_avgpool(inception3a, 64, 64, 96, 64, 96,
64, bnTimeConst)
# 28 x 28 x 320
inception3c = inception_block_pass_through(inception3b, 0, 128, 160, 64,
96, 0, bnTimeConst)
# 14 x 14 x 576
inception4a = inception_block_with_avgpool(inception3c, 224, 64, 96, 96,
128, 128, bnTimeConst)
# 14 x 14 x 576
inception4b = inception_block_with_avgpool(inception4a, 192, 96, 128, 96,
128, 128, bnTimeConst)
# 14 x 14 x 576
inception4c = inception_block_with_avgpool(inception4b, 160, 128, 160, 128,
160, 128, bnTimeConst)
# 14 x 14 x 576
inception4d = inception_block_with_avgpool(inception4c, 96, 128, 192, 160,
192, 128, bnTimeConst)
# 14 x 14 x 576
inception4e = inception_block_pass_through(inception4d, 0, 128, 192, 192,
256, 0, bnTimeConst)
# 7 x 7 x 1024
inception5a = inception_block_with_avgpool(inception4e, 352, 192, 320, 160,
224, 128, bnTimeConst)
# 7 x 7 x 1024
inception5b = inception_block_with_maxpool(inception5a, 352, 192, 320, 192,
224, 128, bnTimeConst)
# Global Average
# 7 x 7 x 1024
pool3 = AveragePooling(filter_shape=(7, 7))(inception5b)
# 1 x 1 x 1024
z = Dense(labelDim, init=he_normal())(pool3)
return z
def bn_inceptionv2_cifar_model(input, labelDim, bnTimeConst):
# 32 x 32 x 3
conv1a = conv_bn_relu_layer(input, 32, (3,3), (1,1), True, bnTimeConst)
# 32 x 32 x 32
conv1b = conv_bn_relu_layer(conv1a, 32, (3,3), (1,1), True, bnTimeConst)
# 32 x 32 x 32
conv1c = conv_bn_relu_layer(conv1b, 32, (3,3), (1,1), True, bnTimeConst)
# 32 x 32 x 64
conv2a = conv_bn_relu_layer(conv1c, 64, (3,3), (1,1), True, bnTimeConst)
# 32 x 32 x 64
conv2b = conv_bn_relu_layer(conv2a, 64, (3,3), (1,1), True, bnTimeConst)
# 32 x 32 x 64
conv2c = conv_bn_relu_layer(conv2b, 64, (3,3), (1,1), True, bnTimeConst)
# Inception Blocks
# 32 x 32 x 64
inception3a = inception_block1(conv2b, 32, 32, 32, 32, 48, 16, bnTimeConst)
# 32 x 32 x 128
inception3b = inception_block1(inception3a, 0, 64, 80, 32, 48, 0, bnTimeConst)
# 32 x 32 x 128
inception3c = inception_block1(inception3b, 0, 64, 80, 32, 48, 0, bnTimeConst)
# 32 x 32 x 128
pool1 = AveragePooling(filter_shape=(3,3), strides = (2,2), pad = True)(inception3c)
# 16 x 16 x 256
inception4a = inception_block2(inception3c, 96, 48, 64, 48, 64, 64, bnTimeConst)
# 16 x 16 x 256
inception4b = inception_block2(inception4a, 96, 48, 64, 48, 64, 64, bnTimeConst)
# 16 x 16 x 256
inception4c = inception_block2(inception4b, 96, 48, 64, 48, 64, 64, bnTimeConst)
# 16 x 16 x 288
inception4d = inception_block2(inception4c, 48, 64, 96, 80, 96, 64, bnTimeConst)
# 16 x 16 x 288
inception4e = inception_block2(inception4d, 0, 128, 192, 192, 256, 0, bnTimeConst)
# 16 x 16 x 288
pool2 = AveragePooling(filter_shape=(3,3), strides = (2,2), pad = True)(inception4e)
# Inception Blocks
# 8 x 8 x 512
inception5a = inception_block1(pool2, 176, 96, 160, 96, 112, 64, bnTimeConst)
# 8 x 8 x 512
inception5b = inception_block1(inception5a, 176, 96, 160, 96, 112, 64, bnTimeConst)
# Global Average
# 8 x 8 x 512
pool3 = AveragePooling(filter_shape=(8,8))(inception5a)
# 1 x 1 x 512
z = Dense(labelDim, init=he_normal())(pool3)
return z
def conv_dw(input, fillter_size, num_filters, strides=(1, 1),
init=he_normal()):
r = Convolution(fillter_size,
num_filters,
activation=None,
init=init,
pad=True,
strides=strides,
bias=False,
groups=1)(input)
print('r.shape ', r.shape)
return relu(r)
def inceptionv1_cifar_model2(input, labelDim, bnTimeConst):
# 32 x 32 x 3
conv1 = conv_bn_relu_layer(input, 32, (3, 3), (1, 1), True, bnTimeConst)
# 32 x 32 x 32
conv2 = conv_bn_relu_layer(conv1, 32, (3, 3), (1, 1), True, bnTimeConst)
# Inception Blocks
# 32 x 32 x 64
inception3a = inception_block_with_maxpool(conv2, 32, 32, 32, 32, 48, 16,
bnTimeConst)
# 32 x 32 x 128
inception3b = inception_block_with_maxpool(inception3a, 32, 32, 32, 32, 48,
16, bnTimeConst)
maxpool1 = MaxPooling((3, 3), strides=(2, 2), pad=True)(inception3b)
# 16 x 16 x 128
inception4a = inception_block_with_maxpool(maxpool1, 96, 48, 64, 48, 64,
64, bnTimeConst)
# 16 x 16 x 288
inception4b = inception_block_with_maxpool(inception4a, 96, 48, 64, 48, 64,
64, bnTimeConst)
# 16 x 16 x 288
inception4c = inception_block_with_maxpool(inception4b, 96, 48, 64, 48, 64,
64, bnTimeConst)
# 16 x 16 x 288
inception4d = inception_block_with_maxpool(inception4c, 96, 48, 64, 48, 64,
64, bnTimeConst)
# 16 x 16 x 288
inception4e = inception_block_with_maxpool(inception4d, 96, 48, 64, 48, 64,
64, bnTimeConst)
maxpool2 = MaxPooling((3, 3), strides=(2, 2), pad=True)(inception4e)
# 8 x 8 x 288
inception5a = inception_block_with_maxpool(inception4e, 176, 96, 160, 96,
112, 64, bnTimeConst)
# 8 x 8 x 512
inception5b = inception_block_with_maxpool(inception5a, 176, 96, 160, 96,
112, 64, bnTimeConst)
# Global Average
# 8 x 8 x 512
pool1 = AveragePooling(filter_shape=(8, 8))(inception5b)
# 1 x 1 x 512
z = Dense(labelDim, init=he_normal())(pool1)
return z
def create_resnet_model(input, num_classes):
conv = convolution_bn(input, (3, 3), 16)
r1_1 = resnet_basic_stack(conv, 16, 3)
r2_1 = resnet_basic_inc(r1_1, 32)
r2_2 = resnet_basic_stack(r2_1, 32, 2)
r3_1 = resnet_basic_inc(r2_2, 64)
r3_2 = resnet_basic_stack(r3_1, 64, 2)
pool = GlobalAveragePooling()(r3_2)
net = Dense(num_classes, init=he_normal(), activation=None)(pool)
return net
def create_resnet_model(input, num_classes):
conv = convolution_bn(input, (3,3), 16)
r1_1 = resnet_basic_stack(conv, 16, 3)
r2_1 = resnet_basic_inc(r1_1, 32)
r2_2 = resnet_basic_stack(r2_1, 32, 2)
r3_1 = resnet_basic_inc(r2_2, 64)
r3_2 = resnet_basic_stack(r3_1, 64, 2)
pool = GlobalAveragePooling()(r3_2)
net = Dense(num_classes, init=he_normal(), activation=None)(pool)
return net
def create_resnet_model(input, num_classes):
conv = convolution_bn(input, (3, 3), 16)
r1_1 = resnet_basic_stack(conv, 16, 3)
r2_1 = resnet_basic_inc(r1_1, 32)
r2_2 = resnet_basic_stack(r2_1, 32, 2)
r3_1 = resnet_basic_inc(r2_2, 64)
r3_2 = resnet_basic_stack(r3_1, 64, 2)
# Global average pooling
pool = AveragePooling(filter_shape=(8, 8), strides=(1, 1))(r3_2)
net = Dense(num_classes, init=he_normal(), activation=None)(pool)
return net
def create_cifar10_model(input, num_classes):
c_map = [32, 64, 128]
conv = conv_bn_relu(input, (3, 3), c_map[0])
r1 = mobilenet_basic_stack(conv, 3, c_map[0])
r2_1 = mobilenet_basic_inc(r1, c_map[1])
r2_2 = mobilenet_basic_stack(r2_1, 3, c_map[1])
r3_1 = mobilenet_basic_inc(r2_2, c_map[2])
r3_2 = mobilenet_basic_stack(r3_1, 3, c_map[2])
# Global average pooling and output
pool = AveragePooling(filter_shape=(8, 8))(r3_2)
z = Dense(num_classes, init=he_normal())(pool)
return z
def conv_bn_relu(layer_input,
filter_size,
num_filters,
strides,
init=he_normal(),
name=''):
"""
Returns a convolutional layer followed by a batch normalization layer and then ReLU activation
"""
r = conv_bn(layer_input,
filter_size,
num_filters,
strides,
init,
name=name)
return relu(r, name='{}_relu'.format(name))
def constructCNN(self, cntk_input):
self.cntk_model = None
if self.network_type == 'idsia':
with C.layers.default_options(activation=C.relu):
self.cntk_model = C.layers.Sequential([
C.layers.Convolution((3,3), strides=(1,1), num_filters=100, pad=False,
init=he_normal(), name="cntk_conv1"),
C.layers.MaxPooling((2,2), strides=(2,2), name="cntk_pool1"),
C.layers.Convolution((4,4), strides=(1,1), num_filters=150, pad=False,
init=he_normal(), name="cntk_conv2"),
C.layers.MaxPooling((2,2), strides=(2,2), name="cntk_pool2"),
C.layers.Convolution((3,3), strides=(1,1), num_filters=250, pad=False,
init=he_normal(), name="cntk_conv3"),
C.layers.MaxPooling((2,2), strides=(2,2), name="cntk_pool3"),
C.layers.Dense(200, init=he_normal(), name="cntk_fc1"),
C.layers.Dense(self.class_num, activation=None, init=he_normal(), name="cntk_fc2") # Leave the softmax for now
])(cntk_input)
elif self.network_type == 'self':
with C.layers.default_options(activation=C.relu):
self.cntk_model = C.layers.Sequential([
C.layers.Convolution((5,5), strides=(2,2), num_filters=64, pad=True,
init=he_normal(), name="cntk_conv1"),
C.layers.MaxPooling((2,2), strides=(2,2), name="cntk_pool1"),
C.layers.Convolution((3,3), strides=(1,1), num_filters=256, pad=True,
init=he_normal(), name="cntk_conv2"),
C.layers.MaxPooling((2,2), strides=(2,2), name="cntk_pool2"),
C.layers.Dense(2048, init=he_normal(), name="cntk_fc1"),
C.layers.Dropout(0.5, name="cntk_dropout1"),
C.layers.Dense(self.class_num, activation=None, init=he_normal(), name="cntk_fc2") # Leave the softmax for now
])(cntk_input)
elif self.network_type == "resnet-56":
self.cntk_model = cntk_resnet.create_model(cntk_input, 9, self.class_num) # 6*9 + 2 = 56
elif self.network_type == "resnet-32":
self.cntk_model = cntk_resnet.create_model(cntk_input, 5, self.class_num) # 6*5 + 2 = 32
elif self.network_type == "resnet-20":
self.cntk_model = cntk_resnet.create_model(cntk_input, 3, self.class_num) # 6*3 + 2 = 20
def conv_bn_relu_layer(input,
num_filters,
filter_size,
strides=(1, 1),
pad=True,
bnTimeConst=4096,
init=he_normal()):
conv = Convolution(filter_size,
num_filters,
activation=None,
init=init,
pad=pad,
strides=strides,
bias=False)(input)
bn = BatchNormalization(map_rank=1,
normalization_time_constant=bnTimeConst,
use_cntk_engine=False)(conv)
return relu(bn)
def bn_inception_model(input, labelDim, bnTimeConst):
# 224 x 224 x 3
conv1 = conv_bn_relu_layer(input, 64, (7,7), (2,2), True, bnTimeConst)
# 112 x 112 x 64
pool1 = MaxPooling(filter_shape=(3,3), strides=(2,2), pad=True)(conv1)
# 56 x 56 x 64
conv2a = conv_bn_relu_layer(pool1, 64, (1,1), (1,1), True, bnTimeConst)
# 56 x 56 x 64
conv2b = conv_bn_relu_layer(conv2a, 192, (3,3), (1,1), True, bnTimeConst)
# 56 x 56 x 192
pool2 = MaxPooling(filter_shape=(3,3), strides=(2,2), pad=True)(conv2b)
# Inception Blocks
# 28 x 28 x 192
inception3a = inception_block_with_avgpool(pool2, 64, 64, 64, 64, 96, 32, bnTimeConst)
# 28 x 28 x 256
inception3b = inception_block_with_avgpool(inception3a, 64, 64, 96, 64, 96, 64, bnTimeConst)
# 28 x 28 x 320
inception3c = inception_block_pass_through(inception3b, 0, 128, 160, 64, 96, 0, bnTimeConst)
# 14 x 14 x 576
inception4a = inception_block_with_avgpool(inception3c, 224, 64, 96, 96, 128, 128, bnTimeConst)
# 14 x 14 x 576
inception4b = inception_block_with_avgpool(inception4a, 192, 96, 128, 96, 128, 128, bnTimeConst)
# 14 x 14 x 576
inception4c = inception_block_with_avgpool(inception4b, 160, 128, 160, 128, 160, 128, bnTimeConst)
# 14 x 14 x 576
inception4d = inception_block_with_avgpool(inception4c, 96, 128, 192, 160, 192, 128, bnTimeConst)
# 14 x 14 x 576
inception4e = inception_block_pass_through(inception4d, 0, 128, 192, 192, 256, 0, bnTimeConst)
# 7 x 7 x 1024
inception5a = inception_block_with_avgpool(inception4e, 352, 192, 320, 160, 224, 128, bnTimeConst)
# 7 x 7 x 1024
inception5b = inception_block_with_maxpool(inception5a, 352, 192, 320, 192, 224, 128, bnTimeConst)
# Global Average
# 7 x 7 x 1024
pool3 = AveragePooling(filter_shape=(7,7))(inception5b)
# 1 x 1 x 1024
z = Dense(labelDim, init=he_normal())(pool3)
return z
def conv_bn(layer_input,
filter_size,
num_filters,
strides,
init=he_normal(),
name=''):
"""
Returns a convolutional layer followed by a batch normalization layer
"""
r = Convolution(filter_size,
num_filters,
activation=None,
init=init,
pad=True,
strides=strides,
bias=True,
name=name)(layer_input)
r = BatchNormalization(map_rank=1,
normalization_time_constant=4096,
name='{}_bn'.format(name))(r)
return r
def inception_v4_model(input, labelDim, bnTimeConst):
l = pre_block(input, bnTimeConst)
# 32 x 32
A1 = Inception_A(l, 32, 32, 32, 64, 32, 64, bnTimeConst)
A2 = Inception_A(A1, 32, 32, 32, 64, 32, 64, bnTimeConst)
A3 = Inception_A(A2, 32, 32, 32, 64, 32, 64, bnTimeConst)
A4 = Inception_A(A3, 32, 32, 32, 64, 32, 64, bnTimeConst)
# 32 x 32 x 192
RA = reduction_A(A4, 32, 32, 64, 64, bnTimeConst)
# 16 x 16 x 288
B1 = Inception_B(RA, 128, 32, 32, 64, 96, 32, 64, 96, bnTimeConst)
B2 = Inception_B(B1, 128, 32, 32, 64, 96, 32, 64, 96, bnTimeConst)
B3 = Inception_B(B2, 128, 32, 32, 64, 96, 32, 64, 96, bnTimeConst)
B4 = Inception_B(B3, 128, 32, 32, 64, 96, 32, 64, 96, bnTimeConst)
B5 = Inception_B(B4, 128, 32, 32, 64, 96, 32, 64, 96, bnTimeConst)
B6 = Inception_B(B5, 128, 32, 32, 64, 96, 32, 64, 96, bnTimeConst)
B7 = Inception_B(B6, 128, 32, 32, 64, 96, 32, 64, 96, bnTimeConst)
# 16 x 16 x 352
RB = reduction_B(B7, 64, 64, 96, bnTimeConst)
# 8 x 8 x 512
C1 = Inception_C(RB, 128, 128, 96, 64, 64, 128, 160, 64, bnTimeConst)
C2 = Inception_C(C1, 128, 128, 96, 64, 64, 128, 160, 64, bnTimeConst)
C3 = Inception_C(C2, 128, 128, 96, 64, 64, 128, 160, 64, bnTimeConst)
# 8 x 8 x 512
pool1 = AveragePooling(filter_shape=(8, 8))(C3)
# 1 x 1 x 512
z = Dense(labelDim, init=he_normal())(pool1)
return z
def gaussian(scale=1):
return he_normal(scale=scale * math.sqrt(0.02))
def inception_v3_model(input, labelDim, dropRate, bnTimeConst):
# 299 x 299 x 3
conv1 = conv_bn_relu_layer(input, 32, (3, 3), (2, 2), False, bnTimeConst)
# 149 x 149 x 32
conv2 = conv_bn_relu_layer(conv1, 32, (3, 3), (1, 1), False, bnTimeConst)
# 147 x 147 x 32
conv3 = conv_bn_relu_layer(conv2, 64, (3, 3), (1, 1), True, bnTimeConst)
# 147 x 147 x 64
pool1 = MaxPooling(filter_shape=(3, 3), strides=(2, 2), pad=False)(conv3)
# 73 x 73 x 64
conv4 = conv_bn_relu_layer(pool1, 80, (1, 1), (1, 1), False, bnTimeConst)
# 73 x 73 x 80
conv5 = conv_bn_relu_layer(conv4, 192, (3, 3), (1, 1), False, bnTimeConst)
# 71 x 71 x 192
pool2 = MaxPooling(filter_shape=(3, 3), strides=(2, 2), pad=False)(conv5)
# 35 x 35 x 192
#
# Inception Blocks
#
mixed1 = inception_block_1(pool2, 64, [48, 64], [64, 96, 96], 32,
bnTimeConst)
# 35 x 35 x 256
mixed2 = inception_block_1(mixed1, 64, [48, 64], [64, 96, 96], 64,
bnTimeConst)
# 35 x 35 x 288
mixed3 = inception_block_1(mixed2, 64, [48, 64], [64, 96, 96], 64,
bnTimeConst)
# 35 x 35 x 288
mixed4 = inception_block_2(mixed3, 384, [64, 96, 96], bnTimeConst)
# 17 x 17 x 768
mixed5 = inception_block_3(mixed4, 192, [128, 128, 192],
[128, 128, 128, 128, 192], 192, bnTimeConst)
# 17 x 17 x 768
mixed6 = inception_block_3(mixed5, 192, [160, 160, 192],
[160, 160, 160, 160, 192], 192, bnTimeConst)
# 17 x 17 x 768
mixed7 = inception_block_3(mixed6, 192, [160, 160, 192],
[160, 160, 160, 160, 192], 192, bnTimeConst)
# 17 x 17 x 768
mixed8 = inception_block_3(mixed7, 192, [192, 192, 192],
[192, 192, 192, 192, 192], 192, bnTimeConst)
# 17 x 17 x 768
mixed9 = inception_block_4(mixed8, [192, 320], [192, 192, 192, 192],
bnTimeConst)
# 8 x 8 x 1280
mixed10 = inception_block_5(mixed9, 320, [384, 384, 384],
[448, 384, 384, 384], 192, bnTimeConst)
# 8 x 8 x 2048
mixed11 = inception_block_5(mixed10, 320, [384, 384, 384],
[448, 384, 384, 384], 192, bnTimeConst)
# 8 x 8 x 2048
#
# Prediction
#
pool3 = AveragePooling(filter_shape=(8, 8), pad=False)(mixed11)
# 1 x 1 x 2048
drop = Dropout(dropout_rate=dropRate)(pool3)
# 1 x 1 x 2048
z = Dense(labelDim, init=he_normal())(drop)
#
# Auxiliary
#
# 17 x 17 x 768
auxPool = AveragePooling(filter_shape=(5, 5), strides=(3, 3),
pad=False)(mixed8)
# 5 x 5 x 768
auxConv1 = conv_bn_relu_layer(auxPool, 128, (1, 1), (1, 1), True,
bnTimeConst)
# 5 x 5 x 128
auxConv2 = conv_bn_relu_layer(auxConv1, 768, (5, 5), (1, 1), False,
bnTimeConst)
# 1 x 1 x 768
aux = Dense(labelDim, init=he_normal())(auxConv2)
return {'z': z, 'aux': aux}
def inception_v3_cifar_model(input, labelDim, bnTimeConst):
# 32 x 32 x 3
conv1 = conv_bn_relu_layer(input, 32, (3, 3), (1, 1), True, bnTimeConst)
# 32 x 32 x 32
conv2 = conv_bn_relu_layer(conv1, 32, (3, 3), (1, 1), True, bnTimeConst)
# 32 x 32 x 32
conv3 = conv_bn_relu_layer(conv2, 64, (3, 3), (1, 1), True, bnTimeConst)
# 32 x 32 x 64
conv4 = conv_bn_relu_layer(conv3, 80, (1, 1), (1, 1), True, bnTimeConst)
# 32 x 32 x 80
conv5 = conv_bn_relu_layer(conv4, 128, (3, 3), (1, 1), True, bnTimeConst)
# 32 x 32 x 128
pool1 = MaxPooling(filter_shape=(3, 3), strides=(2, 2), pad=True)(conv5)
#
# Inception Blocks
# 16 x 16 x 128
mixed1 = inception_block_1(pool1, 32, [32, 48], [48, 64, 64], 32,
bnTimeConst)
# 16 x 16 x 160
mixed2 = inception_block_1(mixed1, 32, [32, 48], [48, 64, 64], 64,
bnTimeConst)
# 16 x 16 x 160
mixed3 = inception_block_1(mixed2, 32, [32, 48], [48, 64, 64], 64,
bnTimeConst)
# 16 x 16 x 160
#mixed4 = inception_block_2(mixed3, 32, [48, 64, 64], bnTimeConst)
mixed4 = inception_block_pass_through(mixed3, 0, 64, 80, 32, 48, 0,
bnTimeConst)
# 8 x 8 x 256
mixed5 = inception_block_3(mixed4, 192, [48, 64, 64],
[128, 128, 128, 128, 192], 192, bnTimeConst)
# 8 x 8 x
mixed6 = inception_block_3(mixed5, 192, [160, 160, 192],
[160, 160, 160, 160, 192], 192, bnTimeConst)
# 8 x 8 x 768
mixed7 = inception_block_3(mixed6, 192, [160, 160, 192],
[160, 160, 160, 160, 192], 192, bnTimeConst)
# 8 x 8 x 768
mixed8 = inception_block_3(mixed7, 192, [192, 192, 192],
[192, 192, 192, 192, 192], 192, bnTimeConst)
# 8 x 8 x 768
mixed9 = inception_block_3(mixed8, 192, [192, 192, 192],
[192, 192, 192, 192, 192], 192, bnTimeConst)
# 8 x 8 x 1280
mixed10 = inception_block_5(mixed9, 320, [384, 384, 384],
[448, 384, 384, 384], 192, bnTimeConst)
# 8 x 8 x 2048
mixed11 = inception_block_5(mixed10, 320, [384, 384, 384],
[448, 384, 384, 384], 192, bnTimeConst)
# 8 x 8 x 2048
#
# Prediction
#
pool3 = AveragePooling(filter_shape=(8, 8))(mixed11)
# 1 x 1 x 2048
drop = Dropout(dropout_rate=0.2)(pool3)
# 1 x 1 x 2048
z = Dense(labelDim, init=he_normal())(drop)
#
# Auxiliary
#
# 8 x 8 x 768
auxPool = AveragePooling(filter_shape=(3, 3), strides=(1, 1),
pad=True)(mixed8)
# 5 x 5 x 768
auxConv1 = conv_bn_relu_layer(auxPool, 128, (1, 1), (1, 1), True,
bnTimeConst)
# 5 x 5 x 128
auxConv2 = conv_bn_relu_layer(auxConv1, 256, (3, 3), (1, 1), True,
bnTimeConst)
# 1 x 1 x 768
aux = Dense(labelDim, init=he_normal())(auxConv2)
return {'z': z, 'aux': aux}
def conv_bn_relu_layer(input, num_filters, filter_size, strides=(1,1), pad=True, bnTimeConst=4096, init=he_normal()):
conv = Convolution(filter_size, num_filters, activation=None, init=init, pad=pad, strides=strides, bias=False)(input)
bn = BatchNormalization(map_rank=1, normalization_time_constant=bnTimeConst, use_cntk_engine=False)(conv)
return relu(bn)
def inception_v3_model(input, labelDim, dropRate, bnTimeConst):
# 299 x 299 x 3
conv1 = conv_bn_relu_layer(input, 32, (3,3), (2,2), False, bnTimeConst)
# 149 x 149 x 32
conv2 = conv_bn_relu_layer(conv1, 32, (3,3), (1,1), False, bnTimeConst)
# 147 x 147 x 32
conv3 = conv_bn_relu_layer(conv2, 64, (3,3), (1,1), True, bnTimeConst)
# 147 x 147 x 64
pool1 = MaxPooling(filter_shape=(3,3), strides=(2,2), pad=False)(conv3)
# 73 x 73 x 64
conv4 = conv_bn_relu_layer(pool1, 80, (1,1), (1,1), False, bnTimeConst)
# 73 x 73 x 80
conv5 = conv_bn_relu_layer(conv4, 192, (3,3), (1,1), False, bnTimeConst)
# 71 x 71 x 192
pool2 = MaxPooling(filter_shape=(3,3), strides=(2,2), pad=False)(conv5)
# 35 x 35 x 192
#
# Inception Blocks
#
mixed1 = inception_block_1(pool2, 64, [48, 64], [64, 96, 96], 32, bnTimeConst)
# 35 x 35 x 256
mixed2 = inception_block_1(mixed1, 64, [48, 64], [64, 96, 96], 64, bnTimeConst)
# 35 x 35 x 288
mixed3 = inception_block_1(mixed2, 64, [48, 64], [64, 96, 96], 64, bnTimeConst)
# 35 x 35 x 288
mixed4 = inception_block_2(mixed3, 384, [64, 96, 96], bnTimeConst)
# 17 x 17 x 768
mixed5 = inception_block_3(mixed4, 192, [128, 128, 192], [128, 128, 128, 128, 192], 192, bnTimeConst)
# 17 x 17 x 768
mixed6 = inception_block_3(mixed5, 192, [160, 160, 192], [160, 160, 160, 160, 192], 192, bnTimeConst)
# 17 x 17 x 768
mixed7 = inception_block_3(mixed6, 192, [160, 160, 192], [160, 160, 160, 160, 192], 192, bnTimeConst)
# 17 x 17 x 768
mixed8 = inception_block_3(mixed7, 192, [192, 192, 192], [192, 192, 192, 192, 192], 192, bnTimeConst)
# 17 x 17 x 768
mixed9 = inception_block_4(mixed8, [192, 320], [192, 192, 192, 192], bnTimeConst)
# 8 x 8 x 1280
mixed10 = inception_block_5(mixed9, 320, [384, 384, 384], [448, 384, 384, 384], 192, bnTimeConst)
# 8 x 8 x 2048
mixed11 = inception_block_5(mixed10, 320, [384, 384, 384], [448, 384, 384, 384], 192, bnTimeConst)
# 8 x 8 x 2048
#
# Prediction
#
pool3 = AveragePooling(filter_shape=(8,8), pad=False)(mixed11)
# 1 x 1 x 2048
drop = Dropout(dropout_rate=dropRate)(pool3)
# 1 x 1 x 2048
z = Dense(labelDim, init=he_normal())(drop)
#
# Auxiliary
#
# 17 x 17 x 768
auxPool = AveragePooling(filter_shape=(5,5), strides=(3,3), pad=False)(mixed8)
# 5 x 5 x 768
auxConv1 = conv_bn_relu_layer(auxPool, 128, (1,1), (1,1), True, bnTimeConst)
# 5 x 5 x 128
auxConv2 = conv_bn_relu_layer(auxConv1, 768, (5,5), (1,1), False, bnTimeConst)
# 1 x 1 x 768
aux = Dense(labelDim, init=he_normal())(auxConv2)
return {
'z': z,
'aux': aux
}
def inception_v3_cifar_model(input, labelDim, bnTimeConst):
# 32 x 32 x 3
conv1 = conv_bn_relu_layer(input, 32, (3,3), (1,1), True, bnTimeConst)
# 32 x 32 x 32
conv2 = conv_bn_relu_layer(conv1, 32, (3,3), (1,1), True, bnTimeConst)
# 32 x 32 x 32
conv3 = conv_bn_relu_layer(conv2, 64, (3,3), (1,1), True, bnTimeConst)
# 32 x 32 x 64
conv4 = conv_bn_relu_layer(conv3, 80, (1,1), (1,1), True, bnTimeConst)
# 32 x 32 x 80
conv5 = conv_bn_relu_layer(conv4, 128, (3,3), (1,1), True, bnTimeConst)
# 32 x 32 x 128
pool1 = MaxPooling(filter_shape=(3,3), strides=(2,2), pad=True)(conv5)
#
# Inception Blocks
# 16 x 16 x 128
mixed1 = inception_block_1(pool1, 32, [32, 48], [48, 64, 64], 32, bnTimeConst)
# 16 x 16 x 176
mixed2 = inception_block_1(mixed1, 32, [32, 48], [48, 64, 64], 32, bnTimeConst)
# 16 x 16 x 176
mixed3 = inception_block_1(mixed2, 32, [32, 48], [48, 64, 64], 32, bnTimeConst)
# 16 x 16 x 176
mixed4 = inception_block_pass_through(mixed3, 0, 32, 48, 32, 48, 0, bnTimeConst)
# 8 x 8 x 256
mixed5 = inception_block_3(mixed4, 64, [48, 64, 64], [48, 48, 48, 48, 64], 64, bnTimeConst)
# 8 x 8 x 256
mixed6 = inception_block_3(mixed5, 64, [48, 64, 64], [48, 48, 48, 48, 64], 64, bnTimeConst)
# 8 x 8 x 256
mixed7 = inception_block_3(mixed6, 64, [48, 64, 64], [48, 48, 48, 48, 64], 64, bnTimeConst)
# 8 x 8 x 256
mixed8 = inception_block_3(mixed7, 80, [48, 64, 64], [48, 48, 48, 48, 64], 80, bnTimeConst)
# 8 x 8 x 288
mixed9 = inception_block_3(mixed8, 128, [64, 128, 128], [64, 64, 64, 64, 128], 128, bnTimeConst)
# 8 x 8 x 512
mixed10 = inception_block_5(mixed9, 128, [64, 128, 128], [64, 64, 64, 128], 128, bnTimeConst)
# 8 x 8 x 512
mixed11 = inception_block_5(mixed10, 128, [64, 128, 128], [64, 64, 64, 128], 128, bnTimeConst)
# 8 x 8 x 512
#
# Prediction
#
pool2 = AveragePooling(filter_shape=(8,8))(mixed11)
# 1 x 1 x 512
z = Dense(labelDim, init=he_normal())(pool2)
#
# Auxiliary
#
# 8 x 8 x 288
auxPool = AveragePooling(filter_shape=(3,3), strides=(1,1), pad=True)(mixed8)
# 8 x 8 x 288
auxConv1 = conv_bn_relu_layer(auxPool, 320, (1,1), (1,1), True, bnTimeConst)
# 8 x 8 x 320
auxConv2 = conv_bn_relu_layer(auxConv1, 512, (3,3), (1,1), True, bnTimeConst)
# 8 x 8 x 512
aux = Dense(labelDim, init=he_normal())(auxConv2)
return {
'z': z,
'aux': aux
}
def conv_bn(input, filter_size, num_filters, strides=(1,1), init=he_normal()):
c = Convolution(filter_size, num_filters, activation=None, init=init, pad=True, strides=strides, bias=False)(input)
r = BatchNormalization(map_rank=1, normalization_time_constant=4096, use_cntk_engine=False)(c)
return r
def conv_bn_relu(input, filter_size, num_filters, strides=(1,1), init=he_normal()):
r = conv_bn(input, filter_size, num_filters, strides, init)
return relu(r)
def conv_bn_layer(input, out_feature_map_count, kernel_shape, strides, bn_time_const, b_value=0, sc_value=1):
num_in_channels = input.shape[0]
kernel_width = kernel_shape[0]
kernel_height = kernel_shape[1]
v_stride = strides[0]
h_stride = strides[1]
# TODO: use RandomNormal to initialize, needs to be exposed in the python api
conv_params = parameter(
shape=(out_feature_map_count, num_in_channels, kernel_height, kernel_width), init=he_normal()
)
conv_func = convolution(conv_params, input, (num_in_channels, v_stride, h_stride))
# TODO: initialize using b_value and sc_value, needs to be exposed in the python api
bias_params = parameter(shape=(out_feature_map_count), init=b_value)
scale_params = parameter(shape=(out_feature_map_count), init=sc_value)
running_mean = constant(0.0, (out_feature_map_count))
running_invstd = constant(0.0, (out_feature_map_count))
return batch_normalization(
conv_func, scale_params, bias_params, running_mean, running_invstd, True, bn_time_const, use_cudnn_engine=True
)