def __init__(self,
in_channels,
out_channels,
kernel_size=1,
stride=1,
padding=0,
dilation=1,
bias=False,
activate_first=True,
inplace=True):
super(SeparableConv2d, self).__init__()
self.relu0 = nn.ReLU(inplace=inplace)
self.depthwise = nn.Conv2d(in_channels,
in_channels,
kernel_size,
stride,
padding,
dilation,
groups=in_channels,
bias=bias)
self.bn1 = SynchronizedBatchNorm2d(in_channels, momentum=bn_mom)
self.relu1 = nn.ReLU(inplace=True)
self.pointwise = nn.Conv2d(in_channels,
out_channels,
1,
1,
0,
1,
1,
bias=bias)
self.bn2 = SynchronizedBatchNorm2d(out_channels, momentum=bn_mom)
self.relu2 = nn.ReLU(inplace=True)
self.activate_first = activate_first
def __init__(self, inplanes, planes, stride=1, atrous=1, downsample=None):
super(BasicBlock, self).__init__()
self.conv1 = conv3x3(inplanes, planes, stride, atrous)
#self.bn1 = nn.BatchNorm2d(planes)
self.bn1 = SynchronizedBatchNorm2d(planes, momentum=bn_mom)
self.relu = nn.ReLU(inplace=True)
self.conv2 = conv3x3(planes, planes)
#self.bn2 = nn.BatchNorm2d(planes)
self.bn2 = SynchronizedBatchNorm2d(planes, momentum=bn_mom)
self.downsample = downsample
self.stride = stride
def __init__(self, block, layers, atrous=None, os=16):
super(ResNet_Atrous, self).__init__()
stride_list = None
if os == 8:
stride_list = [2, 1, 1]
elif os == 16:
stride_list = [2, 2, 1]
else:
raise ValueError(
'resnet_atrous.py: output stride=%d is not supported.' % os)
self.inplanes = 64
self.conv1 = nn.Conv2d(3,
64,
kernel_size=7,
stride=2,
padding=3,
bias=False)
# self.conv1 = nn.Sequential(
# nn.Conv2d(3,64,kernel_size=3, stride=2, padding=1),
# nn.Conv2d(64,64,kernel_size=3, stride=1, padding=1),
# nn.Conv2d(64,64,kernel_size=3, stride=1, padding=1),
# )
self.bn1 = SynchronizedBatchNorm2d(64, momentum=bn_mom)
self.relu = nn.ReLU(inplace=True)
self.maxpool = nn.MaxPool2d(kernel_size=3, stride=2, padding=1)
self.layer1 = self._make_layer(block, 64, 64, layers[0])
self.layer2 = self._make_layer(block,
256,
128,
layers[1],
stride=stride_list[0])
self.layer3 = self._make_layer(block,
512,
256,
layers[2],
stride=stride_list[1],
atrous=16 // os)
self.layer4 = self._make_layer(
block,
1024,
512,
layers[3],
stride=stride_list[2],
atrous=[item * 16 // os for item in atrous])
#self.layer5 = self._make_layer(block, 2048, 512, layers[3], stride=1, atrous=[item*16//os for item in atrous])
#self.layer6 = self._make_layer(block, 2048, 512, layers[3], stride=1, atrous=[item*16//os for item in atrous])
#self.layer7 = self._make_layer(block, 2048, 512, layers[3], stride=1, atrous=[item*16//os for item in atrous])
self.layers = []
for m in self.modules():
if isinstance(m, nn.Conv2d):
nn.init.kaiming_normal_(m.weight,
mode='fan_out',
nonlinearity='relu')
elif isinstance(m, SynchronizedBatchNorm2d):
nn.init.constant_(m.weight, 1)
nn.init.constant_(m.bias, 0)
def __init__(self,
in_filters,
out_filters,
strides=1,
atrous=None,
grow_first=True,
activate_first=True,
inplace=True):
super(Block, self).__init__()
if atrous == None:
atrous = [1] * 3
elif isinstance(atrous, int):
atrous_list = [atrous] * 3
atrous = atrous_list
idx = 0
self.head_relu = True
if out_filters != in_filters or strides != 1:
self.skip = nn.Conv2d(in_filters,
out_filters,
1,
stride=strides,
bias=False)
self.skipbn = SynchronizedBatchNorm2d(out_filters, momentum=bn_mom)
self.head_relu = False
else:
self.skip = None
self.hook_layer = None
if grow_first:
filters = out_filters
else:
filters = in_filters
self.sepconv1 = SeparableConv2d(in_filters,
filters,
3,
stride=1,
padding=1 * atrous[0],
dilation=atrous[0],
bias=False,
activate_first=activate_first,
inplace=self.head_relu)
self.sepconv2 = SeparableConv2d(filters,
out_filters,
3,
stride=1,
padding=1 * atrous[1],
dilation=atrous[1],
bias=False,
activate_first=activate_first)
self.sepconv3 = SeparableConv2d(out_filters,
out_filters,
3,
stride=strides,
padding=1 * atrous[2],
dilation=atrous[2],
bias=False,
activate_first=activate_first,
inplace=inplace)
def __init__(self, inplanes, planes, stride=1, atrous=1, downsample=None):
super(Bottleneck, self).__init__()
self.conv1 = nn.Conv2d(inplanes, planes, kernel_size=1, bias=False)
#self.bn1 = nn.BatchNorm2d(planes)
self.bn1 = SynchronizedBatchNorm2d(planes, momentum=bn_mom)
self.conv2 = nn.Conv2d(planes,
planes,
kernel_size=3,
stride=stride,
padding=1 * atrous,
dilation=atrous,
bias=False)
#self.bn2 = nn.BatchNorm2d(planes)
self.bn2 = SynchronizedBatchNorm2d(planes, momentum=bn_mom)
self.conv3 = nn.Conv2d(planes,
planes * self.expansion,
kernel_size=1,
bias=False)
# self.bn3 = nn.BatchNorm2d(planes * self.expansion)
self.bn3 = SynchronizedBatchNorm2d(planes * self.expansion,
momentum=bn_mom)
self.relu = nn.ReLU(inplace=True)
self.downsample = downsample
self.stride = stride
def __init__(self, dim_in, dim_out, rate=1, bn_mom=0.1):
super(ASPP, self).__init__()
self.branch1 = nn.Sequential(
nn.Conv2d(dim_in,
dim_out,
1,
1,
padding=0,
dilation=rate,
bias=True),
SynchronizedBatchNorm2d(dim_out, momentum=bn_mom),
nn.ReLU(inplace=True),
)
self.branch2 = nn.Sequential(
nn.Conv2d(dim_in,
dim_out,
3,
1,
padding=6 * rate,
dilation=6 * rate,
bias=True),
SynchronizedBatchNorm2d(dim_out, momentum=bn_mom),
nn.ReLU(inplace=True),
)
self.branch3 = nn.Sequential(
nn.Conv2d(dim_in,
dim_out,
3,
1,
padding=12 * rate,
dilation=12 * rate,
bias=True),
SynchronizedBatchNorm2d(dim_out, momentum=bn_mom),
nn.ReLU(inplace=True),
)
self.branch4 = nn.Sequential(
nn.Conv2d(dim_in,
dim_out,
3,
1,
padding=18 * rate,
dilation=18 * rate,
bias=True),
SynchronizedBatchNorm2d(dim_out, momentum=bn_mom),
nn.ReLU(inplace=True),
)
self.branch5_conv = nn.Conv2d(dim_in, dim_out, 1, 1, 0, bias=True)
self.branch5_bn = SynchronizedBatchNorm2d(dim_out, momentum=bn_mom)
self.branch5_relu = nn.ReLU(inplace=True)
self.conv_cat = nn.Sequential(
nn.Conv2d(dim_out * 5, dim_out, 1, 1, padding=0, bias=True),
SynchronizedBatchNorm2d(dim_out, momentum=bn_mom),
nn.ReLU(inplace=True),
)
def _make_layer(self,
block,
inplanes,
planes,
blocks,
stride=1,
atrous=None):
downsample = None
if atrous == None:
atrous = [1] * blocks
elif isinstance(atrous, int):
atrous_list = [atrous] * blocks
atrous = atrous_list
if stride != 1 or inplanes != planes * block.expansion:
downsample = nn.Sequential(
nn.Conv2d(inplanes,
planes * block.expansion,
kernel_size=1,
stride=stride,
bias=False),
SynchronizedBatchNorm2d(planes * block.expansion,
momentum=bn_mom),
)
layers = []
layers.append(
block(inplanes,
planes,
stride=stride,
atrous=atrous[0],
downsample=downsample))
self.inplanes = planes * block.expansion
for i in range(1, blocks):
layers.append(
block(planes * block.expansion,
planes,
stride=1,
atrous=atrous[i]))
return nn.Sequential(*layers)
def __init__(self, os):
""" Constructor
Args:
num_classes: number of classes
"""
super(Xception, self).__init__()
stride_list = None
if os == 8:
stride_list = [2, 1, 1]
elif os == 16:
stride_list = [2, 2, 1]
else:
raise ValueError(
'xception.py: output stride=%d is not supported.' % os)
self.conv1 = nn.Conv2d(3, 32, 3, 2, 1, bias=False)
self.bn1 = SynchronizedBatchNorm2d(32, momentum=bn_mom)
self.relu = nn.ReLU(inplace=True)
self.conv2 = nn.Conv2d(32, 64, 3, 1, 1, bias=False)
self.bn2 = SynchronizedBatchNorm2d(64, momentum=bn_mom)
#do relu here
self.block1 = Block(64, 128, 2)
self.block2 = Block(128, 256, stride_list[0], inplace=False)
self.block3 = Block(256, 728, stride_list[1])
rate = 16 // os
self.block4 = Block(728, 728, 1, atrous=rate)
self.block5 = Block(728, 728, 1, atrous=rate)
self.block6 = Block(728, 728, 1, atrous=rate)
self.block7 = Block(728, 728, 1, atrous=rate)
self.block8 = Block(728, 728, 1, atrous=rate)
self.block9 = Block(728, 728, 1, atrous=rate)
self.block10 = Block(728, 728, 1, atrous=rate)
self.block11 = Block(728, 728, 1, atrous=rate)
self.block12 = Block(728, 728, 1, atrous=rate)
self.block13 = Block(728, 728, 1, atrous=rate)
self.block14 = Block(728, 728, 1, atrous=rate)
self.block15 = Block(728, 728, 1, atrous=rate)
self.block16 = Block(728,
728,
1,
atrous=[1 * rate, 1 * rate, 1 * rate])
self.block17 = Block(728,
728,
1,
atrous=[1 * rate, 1 * rate, 1 * rate])
self.block18 = Block(728,
728,
1,
atrous=[1 * rate, 1 * rate, 1 * rate])
self.block19 = Block(728,
728,
1,
atrous=[1 * rate, 1 * rate, 1 * rate])
self.block20 = Block(728,
1024,
stride_list[2],
atrous=rate,
grow_first=False)
#self.block12=Block(728,1024,2,2,start_with_relu=True,grow_first=False)
self.conv3 = SeparableConv2d(1024,
1536,
3,
1,
1 * rate,
dilation=rate,
activate_first=False)
# self.bn3 = SynchronizedBatchNorm2d(1536, momentum=bn_mom)
self.conv4 = SeparableConv2d(1536,
1536,
3,
1,
1 * rate,
dilation=rate,
activate_first=False)
# self.bn4 = SynchronizedBatchNorm2d(1536, momentum=bn_mom)
#do relu here
self.conv5 = SeparableConv2d(1536,
2048,
3,
1,
1 * rate,
dilation=rate,
activate_first=False)
# self.bn5 = SynchronizedBatchNorm2d(2048, momentum=bn_mom)
self.layers = []
#------- init weights --------
for m in self.modules():
if isinstance(m, nn.Conv2d):
n = m.kernel_size[0] * m.kernel_size[1] * m.out_channels
m.weight.data.normal_(0, math.sqrt(2. / n))
elif isinstance(m, SynchronizedBatchNorm2d):
m.weight.data.fill_(1)
m.bias.data.zero_()