def vgg_block(num_convs, channels):
"""
define the basic structure of vgg
structure: n convolution with 3x3 kernel, a 2x2 pooling
mgnn.Sequential() is a structure for building net work, see: http://zh.gluon.ai/chapter_gluon-basics/index.html
:param num_convs:
:param channels:
:return:
"""
out = mgnn.Sequential()
for _ in range(channels):
out.add(
mgnn.Conv2D(channels=channels,
kernel_size=3,
padding=1,
activation='relu'))
out.add(mgnn.MaxPool2D(pool_size=2, strides=2))
return out
def __init__(self,
block,
layers,
channels,
classes=1000,
thumbnail=False,
**kwargs):
super(ResNetV2, self).__init__(channels, classes, **kwargs)
assert len(layers) == len(channels) - 1
# self.features.add(nn.BatchNorm(scale=False, center=False))
self.features.add(nn.BatchNorm(scale=False, epsilon=2e-5))
if thumbnail:
self.features.add(
nn.Conv2D(channels[0],
kernel_size=3,
strides=1,
padding=1,
in_channels=0))
else:
self.features.add(nn.Conv2D(channels[0], 7, 2, 3, use_bias=False))
# fix_gamma=False missing ?
self.features.add(nn.BatchNorm())
self.features.add(nn.Activation('relu'))
self.features.add(nn.MaxPool2D(3, 2, 1))
in_channels = channels[0]
for i, num_layer in enumerate(layers):
stride = 1 if i == 0 else 2
self.features.add(
self._make_layer(block,
num_layer,
channels[i + 1],
stride,
i + 1,
in_channels=in_channels))
in_channels = channels[i + 1]
# fix_gamma=False missing ?
self.features.add(nn.BatchNorm())
self.features.add(nn.Activation('relu'))
self.features.add(nn.GlobalAvgPool2D())
self.features.add(nn.Flatten())
def __init__(self,num_class,verbose = False,**kwargs):
super(ResNet,self).__init__(**kwargs)
self.verbose = verbose
with self.name_scope():
# block 1
b1 = nn.Conv2D(64,kernel_size=7,strides=2)
# block 2
b2 = nn.Sequential()
b2.add(
nn.MaxPool2D(pool_size=3,strides=2),
Residual(64),
Residual(64)
)
# block 3
b3 = nn.Sequential()
b3.add(
Residual(128,same_shape=False),
Residual(128)
)
# block 4
b4 = nn.Sequential()
b4.add(
Residual(256,same_shape=False),
Residual(256)
)
# block 5
b5 = nn.Sequential()
b5.add(
Residual(512,same_shape=False),
Residual(512)
)
# block 6
b6 = nn.Sequential()
b6.add(
nn.AvgPool2D(pool_size=3),
nn.Dense(num_class))
self.net = nn.Sequential()
self.net.add(b1,b2,b3,b4,b5,b6)
def __init__(self, c1, c2, c3, c4, **kwargs):
super(Inception, self).__init__(**kwargs)
# line one: 1 \to 1 convolution layer
self.p1_1 = nn.Conv2D(c1, kernel_size=1, activation='relu')
# line two: 1 \to 1 convolution layer followed by 3\ to 3 convolution layer
self.p2_1 = nn.Conv2D(c2[0], kernel_size=1, activation='relu')
self.p2_2 = nn.Conv2D(c2[1],
kernel_size=3,
padding=1,
activation='relu')
# line three: 1 \to 1 convolution layer followed by 5\ to 5 convolution layer
self.p3_1 = nn.Conv2D(c3[0], kernel_size=1, activation='relu')
self.p3_2 = nn.Conv2D(c3[1],
kernel_size=5,
padding=2,
activation='relu')
# line four: 3 \to 3 maxpooling followed by 1 \to 1 convolution layer
self.p4_1 = nn.MaxPool2D(pool_size=3, strides=1, padding=1)
self.p4_2 = nn.Conv2D(c4, kernel_size=1, activation='relu')
def __init__(self,
channels,
final_block_channels,
transpose_descriptors=True,
hybridizable=True,
batch_size=1,
in_size=(224, 224),
in_channels=1,
**kwargs):
super(SuperPointNet, self).__init__(**kwargs)
assert ((batch_size is not None) or not hybridizable)
assert ((in_size is not None) or not hybridizable)
self.batch_size = batch_size
self.in_size = in_size
with self.name_scope():
self.features = nn.HybridSequential(prefix="")
for i, channels_per_stage in enumerate(channels):
stage = nn.HybridSequential(prefix="stage{}_".format(i + 1))
for j, out_channels in enumerate(channels_per_stage):
if (j == 0) and (i != 0):
stage.add(nn.MaxPool2D(pool_size=2, strides=2))
stage.add(
vgg_conv3x3(in_channels=in_channels,
out_channels=out_channels,
use_bias=True,
use_bn=False))
in_channels = out_channels
self.features.add(stage)
self.detector = SPDetector(in_channels=in_channels,
mid_channels=final_block_channels,
hybridizable=hybridizable,
batch_size=batch_size,
in_size=in_size)
self.descriptor = SPDescriptor(
in_channels=in_channels,
mid_channels=final_block_channels,
transpose_descriptors=transpose_descriptors,
hybridizable=hybridizable,
batch_size=batch_size,
in_size=in_size)
def __init__(self, n1_1, n2_1, n2_3, n3_1, n3_5, n4_1, **kwargs):
super(Inception, self).__init__(**kwargs)
# path 1
self.p1_conv_1 = nn.Conv2D(n1_1, kernel_size=1, activation='relu')
# path 2
self.p2_conv_1 = nn.Conv2D(n2_1, kernel_size=1, activation='relu')
self.p2_conv_3 = nn.Conv2D(n2_3,
kernel_size=3,
padding=1,
activation='relu')
# path 3
self.p3_conv_1 = nn.Conv2D(n3_1, kernel_size=1, activation='relu')
self.p3_conv_5 = nn.Conv2D(n3_5,
kernel_size=5,
padding=2,
activation='relu')
# path 4
self.p4_pool_3 = nn.MaxPool2D(pool_size=3, padding=1, strides=1)
self.p4_conv_1 = nn.Conv2D(n4_1, kernel_size=1, activation='relu')
def dense_net():
net = nn.HybridSequential()
# add name_scope on the outermost Sequential
with net.name_scope():
# first block
net.add(nn.Conv2D(init_channels, kernel_size=7, strides=2, padding=3),
nn.BatchNorm(), nn.Activation('relu'),
nn.MaxPool2D(pool_size=3, strides=2, padding=1))
# dense blocks
channels = init_channels
for i, layers in enumerate(block_layers):
net.add(DenseBlock(layers, growth_rate))
channels += layers * growth_rate
if i != len(block_layers) - 1:
net.add(transition_block(channels // 2))
# last block
net.add(nn.BatchNorm(), nn.Activation('relu'),
nn.AvgPool2D(pool_size=1), nn.Flatten(), nn.Dense(num_classes))
return net
def _make_layers(self, cfg, use_bias, use_bn):
layers = []
in_channels = 3
for x in cfg:
if x == 'M':
layers += [nn.MaxPool2D(pool_size=2, strides=2)]
else:
if use_bn:
layers += [
nn.Conv2D(in_channels=in_channels,
channels=x,
kernel_size=(3, 3),
padding=(1, 1),
use_bias=False),
nn.BatchNorm(),
nn.Activation('relu')
]
elif use_bias:
layers += [
nn.Conv2D(in_channels=in_channels,
channels=x,
kernel_size=(3, 3),
padding=(1, 1),
use_bias=True),
nn.Activation('relu')
]
else:
layers += [
nn.Conv2D(in_channels=in_channels,
channels=x,
kernel_size=(3, 3),
padding=(1, 1),
use_bias=False),
nn.Activation('relu')
]
in_channels = x
with self.name_scope():
model = nn.HybridSequential(prefix='features_')
for block in layers:
model.add(block)
return model
def __init__(self, c1, c2, c3, c4, **kwargs):
super(Inception, self).__init__(**kwargs)
self.p1 = nn.Conv2D(channels=c1, kernel_size=1, activation='relu')
self.p2_1 = nn.Conv2D(channels=c2[0], kernel_size=1, activation='relu')
self.p2_2 = nn.Conv2D(channels=c2[1],
kernel_size=3,
padding=1,
activation='relu')
self.p3_1 = nn.Conv2D(channels=c3[0], kernel_size=1, activation='relu')
self.p3_2 = nn.Conv2D(channels=c3[1],
kernel_size=5,
padding=2,
activation='relu')
self.p4_1 = nn.MaxPool2D(pool_size=3, strides=1, padding=1)
self.p4_2 = nn.Conv2D(channels=c4, kernel_size=1, activation='relu')
def __init__(self,
channels,
size1=14,
scale=(1, 2, 1),
norm_layer=BatchNorm,
norm_kwargs=None,
**kwargs):
super(AttentionModule_stage3, self).__init__(**kwargs)
p, t, r = scale
with self.name_scope():
self.first_residual_blocks = nn.HybridSequential()
_add_block(self.first_residual_blocks,
ResidualBlock,
p,
channels,
norm_layer=norm_layer,
norm_kwargs=norm_kwargs)
self.trunk_branches = nn.HybridSequential()
_add_block(self.trunk_branches,
ResidualBlock,
t,
channels,
norm_layer=norm_layer,
norm_kwargs=norm_kwargs)
self.mpool1 = nn.MaxPool2D(pool_size=3, strides=2, padding=1)
self.softmax1_blocks = nn.HybridSequential()
_add_block(self.softmax1_blocks,
ResidualBlock,
2 * r,
channels,
norm_layer=norm_layer,
norm_kwargs=norm_kwargs)
self.interpolation1 = UpsamplingBilinear2d(size=size1)
self.softmax2_blocks = nn.HybridSequential()
_add_sigmoid_layer(self.softmax2_blocks, channels, norm_layer,
norm_kwargs)
self.last_blocks = ResidualBlock(channels)
def __init__(self, in_channels, out_channels, bn_use_global_stats,
avg_pool, **kwargs):
super(InceptionPoolBranch, self).__init__(**kwargs)
with self.name_scope():
if avg_pool:
self.pool = nn.AvgPool2D(pool_size=3,
strides=1,
padding=1,
ceil_mode=True,
count_include_pad=True)
else:
self.pool = nn.MaxPool2D(pool_size=3,
strides=1,
padding=1,
ceil_mode=True)
self.conv = conv1x1_block(in_channels=in_channels,
out_channels=out_channels,
use_bias=True,
bn_use_global_stats=bn_use_global_stats)
def __init__(self,
in_channels,
out_channels,
strides,
reps,
start_with_relu=True,
grow_first=True,
bn_use_global_stats=False,
**kwargs):
super(XceptionUnit, self).__init__(**kwargs)
self.resize_identity = (in_channels != out_channels) or (strides != 1)
with self.name_scope():
if self.resize_identity:
self.identity_conv = conv1x1_block(
in_channels=in_channels,
out_channels=out_channels,
strides=strides,
bn_use_global_stats=bn_use_global_stats,
activate=False)
self.body = nn.HybridSequential(prefix='')
for i in range(reps):
if (grow_first and (i == 0)) or ((not grow_first) and
(i == reps - 1)):
in_channels_i = in_channels
out_channels_i = out_channels
else:
if grow_first:
in_channels_i = out_channels
out_channels_i = out_channels
else:
in_channels_i = in_channels
out_channels_i = in_channels
activate = start_with_relu if (i == 0) else True
self.body.add(
dws_conv3x3_block(in_channels=in_channels_i,
out_channels=out_channels_i,
bn_use_global_stats=bn_use_global_stats,
activate=activate))
if strides != 1:
self.body.add(
nn.MaxPool2D(pool_size=3, strides=strides, padding=1))
def _make_branch(use_pool, norm_layer, norm_kwargs, *conv_settings):
out = nn.HybridSequential(prefix='')
if use_pool == 'avg':
out.add(nn.AvgPool2D(pool_size=3, strides=1, padding=1))
elif use_pool == 'max':
out.add(nn.MaxPool2D(pool_size=3, strides=1, padding=1))
setting_names = ['in_channels', 'channels', 'kernel_size', 'strides', 'padding']
for setting in conv_settings:
kwargs = {}
for i, value in enumerate(setting):
if value is not None:
if setting_names[i] == 'in_channels':
in_channels = value
elif setting_names[i] == 'channels':
channels = value
else:
kwargs[setting_names[i]] = value
out.add(_make_basic_conv(in_channels, channels, channels, norm_layer, norm_kwargs, **kwargs))
return out
def __init__(self,
layers,
batch_size,
width,
classes=1000,
last_gamma=False,
**kwargs):
super(DBTNet, self).__init__(**kwargs)
channels = 64
self.gconvs = nn.HybridSequential(prefix='')
with self.name_scope():
self.features = nn.HybridSequential(prefix='')
self.features1 = nn.HybridSequential(prefix='')
self.features.add(nn.BatchNorm(scale=False, center=False))
self.features.add(nn.Conv2D(channels, 7, 2, 3, use_bias=False))
self.features.add(nn.BatchNorm())
self.features.add(nn.Activation('relu'))
self.features.add(nn.MaxPool2D(3, 2, 1))
for i, num_layer in enumerate(layers):
stride = 1 if i == 0 else 2
self.features.add(
self._make_layer(channels, num_layer, stride, last_gamma,
False, i + 1, batch_size, width))
channels *= 2
gconv = GroupConv2(2048,
batch_size=batch_size,
kernel_size=1,
use_bias=False,
width=width // 32)
self.gconvs.add(gconv)
self.features.add(gconv)
self.features.add(
GB2HybridLayer(32, np.int(2048 / 32), width // 32, 'gb'))
self.features1.add(nn.GlobalAvgPool2D())
self.features1.add(nn.Flatten())
self.myoutput = nn.HybridSequential(prefix='new')
with self.myoutput.name_scope():
self.myoutput.add(
nn.Conv2D(classes, kernel_size=1, padding=0, use_bias=True))
def GetNet():
net = nn.HybridSequential()
with net.name_scope():
net.add(nn.Conv2D(channels=32, kernel_size=5, activation='relu'))
net.add(nn.MaxPool2D(pool_size=2, strides=1))
net.add(nn.Conv2D(channels=32, kernel_size=5, activation='relu'))
net.add(nn.AvgPool2D(pool_size=2, strides=1))
net.add(nn.Conv2D(channels=32, kernel_size=3, activation='relu'))
net.add(nn.AvgPool2D(pool_size=2, strides=1))
net.add(nn.Conv2D(channels=32, kernel_size=3, activation='relu'))
net.add(nn.AvgPool2D(pool_size=2, strides=1))
net.add(nn.Flatten())
net.add(nn.Dense(256))
net.add(Cont())
return net
def _make_features(self, layers, filters, strides, batch_norm):
featurizer = nn.HybridSequential(prefix='')
for i, num in enumerate(layers):
for _ in range(num):
featurizer.add(
nn.Conv2D(filters[i],
kernel_size=3,
padding=1,
weight_initializer=Xavier(rnd_type='gaussian',
factor_type='out',
magnitude=2),
bias_initializer='zeros'))
if batch_norm:
featurizer.add(
self.norm_layer(**({} if self.norm_kwargs is None else
self.norm_kwargs)))
featurizer.add(nn.Activation('relu'))
featurizer.add(nn.MaxPool2D(strides=strides[i]))
return featurizer
def __init__(self, c1, c2, c3, c4, **kwargs):
super(Inception, self).__init__(**kwargs)
# path1, 1x1 Conv
self.p1_1 = nn.Conv2D(c1, kernel_size=1, activation='relu')
# path2, 1x1 Conv & 3x3 Conv
self.p2_1 = nn.Conv2D(c2[0], kernel_size=1, activation='relu')
self.p2_2 = nn.Conv2D(c2[1],
kernel_size=3,
padding=1,
activation='relu')
# path3, 1x1 Conv & 5x5 Conv
self.p3_1 = nn.Conv2D(c3[0], kernel_size=1, activation='relu')
self.p3_2 = nn.Conv2D(c3[1],
kernel_size=5,
padding=2,
activation='relu')
# path4, 3x3 Max_pooling & 1x1 Conv
self.p4_1 = nn.MaxPool2D(pool_size=3, strides=1, padding=1)
self.p4_2 = nn.Conv2D(c4, kernel_size=1, activation='relu')
def __init__(self,
in_channels,
out_channels,
**kwargs):
super(ShuffleInitBlock, self).__init__(**kwargs)
with self.name_scope():
self.conv = nn.Conv2D(
channels=out_channels,
kernel_size=3,
strides=2,
padding=1,
use_bias=False,
in_channels=in_channels)
self.bn = nn.BatchNorm(in_channels=out_channels)
self.activ = nn.Activation('relu')
self.pool = nn.MaxPool2D(
pool_size=3,
strides=2,
padding=1)
def __init__(self, c1, c2, c3, c4, **kwargs):
super(Inception, self).__init__(**kwargs)
# 线路 1，单 1 x 1 卷积层。
self.p1_1 = nn.Conv2D(c1, kernel_size=1, activation='relu')
# 线路 2，1 x 1 卷积层后接 3 x 3 卷积层。
self.p2_1 = nn.Conv2D(c2[0], kernel_size=1, activation='relu')
self.p2_2 = nn.Conv2D(c2[1],
kernel_size=3,
padding=1,
activation='relu')
# 线路 3，1 x 1 卷积层后接 5 x 5 卷积层。
self.p3_1 = nn.Conv2D(c3[0], kernel_size=1, activation='relu')
self.p3_2 = nn.Conv2D(c3[1],
kernel_size=5,
padding=2,
activation='relu')
# 线路 4，3 x 3 最⼤池化层后接 1 x 1 卷积层。
self.p4_1 = nn.MaxPool2D(pool_size=3, strides=1, padding=1)
self.p4_2 = nn.Conv2D(c4, kernel_size=1, activation='relu')
def __init__(self,
init_channels,
growth_rate,
num_layers_list,
strides_list,
bn_size=4,
dropout=0,
num_classes=1000,
use_backbone=True,
**kwargs):
super(DenseNet, self).__init__(**kwargs)
with self.name_scope():
self.first_layer = nn.HybridSequential()
self.features = nn.HybridSequential()
self.first_layer.add(
nn.Conv2D(init_channels,
kernel_size=7,
strides=2,
padding=3,
use_bias=False))
self.first_layer.add(nn.BatchNorm())
self.first_layer.add(nn.Activation('relu'))
self.first_pool = nn.MaxPool2D((2, 2), (2, 2))
num_channels = init_channels
for i, num_layers in enumerate(num_layers_list):
self.features.add(
DenseBlock(num_layers, bn_size, growth_rate, dropout))
num_channels = num_channels + num_layers * growth_rate
if i != len(num_layers_list) - 1:
num_channels = num_channels // 2
self.features.add(Transition(num_channels,
strides_list[i]))
if not use_backbone:
self.output = nn.HybridSequential()
self.output.add(nn.BatchNorm())
self.output.add(nn.Activation('relu'))
self.output.add(nn.GlobalAvgPool2D())
self.output.add(nn.Dense(num_classes))
else:
self.output = None
def __init__(self,
backbone,
heads,
head_conv_channel=0,
scale=4.0,
topk=100,
in_channels=3,
in_size=(512, 512),
**kwargs):
super(CenterNet, self).__init__(**kwargs)
self.in_size = in_size
self.in_channels = in_channels
with self.name_scope():
self.backbone = backbone
self.heatmap_nms = nn.MaxPool2D(
pool_size=3,
strides=1,
padding=1)
self.decoder = CenterNetDecoder(
topk=topk,
scale=scale)
self.heads = nn.HybridSequential(prefix="heads")
for name, values in heads.items():
head = nn.HybridSequential(name)
num_output = values['num_output']
if head_conv_channel > 0:
head.add(nn.Conv2D(
head_conv_channel,
kernel_size=3,
padding=1,
use_bias=True))
head.add(nn.Activation('relu'))
head.add(nn.Conv2D(
num_output,
kernel_size=1,
strides=1,
padding=0,
use_bias=True))
self.heads.add(head)
def __init__(self,
num_init_features,
growth_rate,
block_config,
bn_size=4,
dropout=0,
classes=1000,
norm_layer=BatchNorm,
norm_kwargs=None,
**kwargs):
super(DenseNet, self).__init__(**kwargs)
with self.name_scope():
self.features = nn.HybridSequential(prefix='')
self.features.add(
nn.Conv2D(num_init_features,
kernel_size=7,
strides=2,
padding=3,
use_bias=False))
self.features.add(
norm_layer(**({} if norm_kwargs is None else norm_kwargs)))
self.features.add(nn.Activation('relu'))
self.features.add(nn.MaxPool2D(pool_size=3, strides=2, padding=1))
# Add dense blocks
num_features = num_init_features
for i, num_layers in enumerate(block_config):
self.features.add(
_make_dense_block(num_layers, bn_size, growth_rate,
dropout, i + 1, norm_layer, norm_kwargs))
num_features = num_features + num_layers * growth_rate
if i != len(block_config) - 1:
self.features.add(
_make_transition(num_features // 2, norm_layer,
norm_kwargs))
num_features = num_features // 2
self.features.add(
norm_layer(**({} if norm_kwargs is None else norm_kwargs)))
self.features.add(nn.Activation('relu'))
self.features.add(nn.AvgPool2D(pool_size=7))
self.features.add(nn.Flatten())
self.output = nn.Dense(classes)
def __init__(self, num_of_pts=98, **kwargs):
super(BASE, self).__init__(**kwargs)
self.pts_num = num_of_pts
self.lmks_net = mx.gluon.nn.HybridSequential()
self.lmks_net.add(
nn.Conv2D(channels=16,
kernel_size=(3, 3),
strides=(2, 2),
padding=(1, 1)), nn.BatchNorm(), nn.Activation('relu'),
nn.Conv2D(channels=32,
kernel_size=(3, 3),
strides=(1, 1),
padding=(1, 1)), nn.BatchNorm(), nn.Activation('relu'),
nn.Conv2D(channels=32,
kernel_size=(3, 3),
strides=(2, 2),
padding=(1, 1)), nn.BatchNorm(), nn.Activation('relu'),
nn.Conv2D(channels=32,
kernel_size=(3, 3),
strides=(1, 1),
padding=(1, 1)), nn.BatchNorm(), nn.Activation('relu'),
nn.Conv2D(channels=32,
kernel_size=(3, 3),
strides=(2, 2),
padding=(1, 1)), nn.BatchNorm(), nn.Activation('relu'),
nn.Conv2D(channels=64,
kernel_size=(3, 3),
strides=(1, 1),
padding=(1, 1)), nn.BatchNorm(), nn.Activation('relu'),
nn.Conv2D(channels=64,
kernel_size=(3, 3),
strides=(2, 2),
padding=(1, 1)), nn.BatchNorm(), nn.Activation('relu'),
nn.Conv2D(channels=128,
kernel_size=(3, 3),
strides=(1, 1),
padding=(1, 1)), nn.BatchNorm(), nn.Activation('relu'),
nn.MaxPool2D(pool_size=(2, 2), strides=(2, 2)),
nn.Conv2D(channels=num_of_pts * 2,
kernel_size=(3, 3),
strides=(1, 1),
padding=(0, 0)))
def __init__(self,
block,
layers,
channels,
classes=1000,
thumbnail=False,
last_gamma=False,
use_se=False,
**kwargs):
super(ResNetV2, self).__init__(**kwargs)
assert len(layers) == len(channels) - 1
with self.name_scope():
self.features = nn.HybridSequential(prefix='')
self.features.add(nn.BatchNorm(scale=False, center=False))
if thumbnail:
self.features.add(_conv3x3(channels[0], 1, 0))
else:
self.features.add(
nn.Conv2D(channels[0], 7, 2, 3, use_bias=False))
self.features.add(nn.BatchNorm())
self.features.add(nn.Activation('relu'))
self.features.add(nn.MaxPool2D(3, 2, 1))
in_channels = channels[0]
for i, num_layer in enumerate(layers):
stride = 1 if i == 0 else 2
self.features.add(
self._make_layer(block,
num_layer,
channels[i + 1],
stride,
i + 1,
in_channels=in_channels,
last_gamma=last_gamma,
use_se=use_se))
in_channels = channels[i + 1]
self.features.add(nn.BatchNorm())
self.features.add(nn.Activation('relu'))
self.features.add(nn.GlobalAvgPool2D())
self.features.add(nn.Flatten())
self.output = nn.Dense(classes, in_units=in_channels)
def __init__(self, **kwargs):
super(ResidualAttentionModel_92, self).__init__(**kwargs)
"""
input size 224
"""
with self.name_scope():
self.conv1 = nn.HybridSequential()
with self.conv1.name_scope():
self.conv1.add(
nn.Conv2D(64,
kernel_size=7,
strides=2,
padding=3,
use_bias=False))
self.conv1.add(nn.BatchNorm())
self.conv1.add(nn.Activation('relu'))
self.mpool1 = nn.MaxPool2D(pool_size=3, strides=2, padding=1)
self.residual_block1 = ResidualBlock(256, in_channels=64)
self.attention_module1 = AttentionModule_stage1(256)
self.residual_block2 = ResidualBlock(512,
in_channels=256,
stride=2)
self.attention_module2 = AttentionModule_stage2(512)
self.attention_module2_2 = AttentionModule_stage2(512)
self.residual_block3 = ResidualBlock(1024,
in_channels=512,
stride=2)
self.attention_module3 = AttentionModule_stage3(1024)
self.attention_module3_2 = AttentionModule_stage3(1024)
self.attention_module3_3 = AttentionModule_stage3(1024)
self.residual_block4 = ResidualBlock(2048,
in_channels=1024,
stride=2)
self.residual_block5 = ResidualBlock(2048)
self.residual_block6 = ResidualBlock(2048)
self.mpool2 = nn.HybridSequential()
with self.mpool2.name_scope():
self.mpool2.add(nn.BatchNorm())
self.mpool2.add(nn.Activation('relu'))
self.mpool2.add(nn.AvgPool2D(pool_size=7, strides=1))
self.fc = nn.Conv2D(10, kernel_size=1)
def __init__(self,
in_channels,
out_channels,
bn_use_global_stats=False,
**kwargs):
super(SEInitBlock, self).__init__(**kwargs)
mid_channels = out_channels // 2
with self.name_scope():
self.conv1 = conv3x3_block(in_channels=in_channels,
out_channels=mid_channels,
strides=2,
bn_use_global_stats=bn_use_global_stats)
self.conv2 = conv3x3_block(in_channels=mid_channels,
out_channels=mid_channels,
bn_use_global_stats=bn_use_global_stats)
self.conv3 = conv3x3_block(in_channels=mid_channels,
out_channels=out_channels,
bn_use_global_stats=bn_use_global_stats)
self.pool = nn.MaxPool2D(pool_size=3, strides=2, padding=1)
def __init__(self, **kwargs):
super(Network, self).__init__(**kwargs)
with self.name_scope():
self.conv = nn.Conv2D(230, kernel_size=[3, DIMENSION], padding=[2, 0], strides=1)
self.pmp = nn.MaxPool2D(pool_size=[FIXED_WORD_LENGTH, 1])
self.conv_out = nn.Sequential()
self.conv_out.add(nn.Flatten())
self.conv_out.add(nn.Activation(activation='relu'))
self.center_att = nn.Sequential()
self.center_att.add(nn.Dense(1, in_units=200, flatten=False,
activation="sigmoid"))
self.center_out = nn.Sequential()
# self.center_out.add(nn.Dense(200, activation="relu"))
self.center_out.add(nn.Activation(activation='relu'))
self.output = nn.Sequential()
self.output.add(nn.Dropout(0.5))
self.output.add(nn.Dense(128, activation="sigmoid"))
self.output.add(nn.Dense(7, activation='tanh'))
def _make_features(self, layers, filters, batch_norm):
featurizer = nn.HybridSequential(prefix='')
first = True
for i, num in enumerate(layers):
for _ in range(num):
conv_block = nn.Conv2D if first else nn.QConv2D
first = False
featurizer.add(
conv_block(filters[i],
kernel_size=3,
padding=1,
weight_initializer=Xavier(rnd_type='gaussian',
factor_type='out',
magnitude=2),
bias_initializer='zeros'))
if batch_norm:
featurizer.add(nn.BatchNorm())
featurizer.add(nn.Activation('relu'))
featurizer.add(nn.MaxPool2D(strides=2))
return featurizer
def resnet18(num_classes):
"""The ResNet-18 model."""
net = nn.Sequential()
net.add(nn.Conv2D(64, kernel_size=3, strides=1, padding=1), nn.BatchNorm(),
nn.Activation('relu'),
nn.MaxPool2D(pool_size=3, strides=2, padding=1))
def resnet_block(num_channels, num_residuals, first_block=False):
blk = nn.Sequential()
for i in range(num_residuals):
if i == 0 and not first_block:
blk.add(Residual(num_channels, use_1x1conv=True, strides=2))
else:
blk.add(Residual(num_channels))
return blk
net.add(resnet_block(64, 2, first_block=True), resnet_block(128, 2),
resnet_block(256, 2), resnet_block(512, 2))
net.add(nn.GlobalAvgPool2D(), nn.Dense(num_classes))
return net
def _make_features(self, layers, filters, batch_norm):
featurizer = nn.HybridSequential(prefix='')
for i, num in enumerate(layers):
for _ in range(num):
featurizer.add(
nn.Conv2D(
filters[i],
kernel_size=3,
padding=1,
weight_initializer=Xavier(rnd_type='gaussian',
factor_type='out',
magnitude=2),
bias_initializer='zeros',
#name = 'conv%s_%s'%(str(i+1),str(_+1))\
))
if batch_norm:
featurizer.add(nn.BatchNorm())
featurizer.add(nn.Activation('relu'))
featurizer.add(nn.MaxPool2D(strides=2))
return featurizer
