def __init__(self,
num_classes: int,
in_channels: int = 256,
out_channels: int = 128):
super(FPNSegmentationHead, self).__init__()
self.conv1 = modules.conv3x3(in_channels, out_channels)
self.conv2 = modules.conv3x3(in_channels, out_channels)
self.conv3 = modules.conv3x3(in_channels, out_channels)
self.conv4 = modules.conv3x3(in_channels, out_channels)
self.conv3x3 = modules.conv3x3(out_channels * 4, num_classes)
def __init__(self, in_channels, out_channels, bottleneck, group, anytime):
super(AnytimeGrouppedBlock, self).__init__()
self.in_channels = in_channels
self.out_channels = out_channels
self.bottleneck = bottleneck
self.group = group
self.anytime = anytime
assert group % anytime == 0
bottleneck *= group
self.conv1 = conv1x1(in_channels, bottleneck)
self.conv2 = conv3x3(bottleneck, bottleneck, group=group)
# self.conv3 = conv1x1(bottleneck, out_channels*anytime, group=anytime)
self.conv3 = conv1x1(bottleneck, out_channels)
self.bn1 = nn.ModuleList()
for i in range(anytime):
self.bn1.append(nn.BatchNorm2d(in_channels))
self.bn2 = nn.ModuleList()
for i in range(anytime):
self.bn2.append(nn.BatchNorm2d(bottleneck * (i + 1) // anytime))
self.bn3 = nn.ModuleList()
for i in range(anytime):
self.bn3.append(nn.BatchNorm2d(bottleneck * (i + 1) // anytime))
self.relu = nn.ReLU(inplace=True)
def __init__(self,
num_blocks=3,
num_classes=10,
width=64,
bottleneck=4,
cardinality=8,
anytime=8,
init=False):
super(AnytimeResNeXt, self).__init__()
self.num_blocks = num_blocks
self.anytime = anytime
self.cardinality = cardinality
self.width = width
self.num_classes = num_classes
self.bottleneck = bottleneck
w, b, c = width, bottleneck, cardinality
self.transitions = nn.ModuleList([conv3x3(3, w)])
for i in range(2):
self.transitions.append(
nn.Sequential(nn.AvgPool2d(2), ChannelPadding(w << i)))
self.stages = nn.ModuleList()
for i in range(3):
self.stages.append(nn.ModuleList())
for j in range(num_blocks):
self.stages[i].append(
AnytimeGrouppedBlock(w << i, w << i, b << i, c, anytime))
self.output_layers = nn.ModuleList()
for i in range(anytime):
layer = nn.Sequential(nn.BatchNorm2d(w << 2),
nn.ReLU(inplace=True), nn.AvgPool2d(8),
View(-1), nn.Linear(w << 2, num_classes))
self.output_layers.append(layer)
if init:
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, nn.BatchNorm2d):
m.weight.data.fill_(1)
m.bias.data.zero_()
elif isinstance(m, nn.Linear):
m.bias.data.zero_()
def __init__(self, in_channels, out_channels, bottleneck, group):
super(GrouppedBlock, self).__init__()
self.in_channels = in_channels
self.out_channels = out_channels
self.bottleneck = bottleneck
self.group = group
bottleneck *= group
self.conv1 = conv1x1(in_channels, bottleneck)
self.conv2 = conv3x3(bottleneck, bottleneck, group=group)
self.conv3 = conv1x1(bottleneck, out_channels)
self.bn1 = nn.BatchNorm2d(in_channels)
self.bn2 = nn.BatchNorm2d(bottleneck)
self.bn3 = nn.BatchNorm2d(bottleneck)
self.relu = nn.ReLU(inplace=True)
def test_return(self):
conv: nn.Module = modules.conv3x3(2, 3)
self.assertEqual(len(conv), 3) # conv has (conv2d, bn, relu)
def __init__(self,
num_blocks=3,
num_classes=10,
width=64,
bottleneck=4,
cardinality=8,
pretrained=None,
num_copies=None):
super(ResNeXt, self).__init__()
self.num_blocks = num_blocks
self.num_classes = num_classes
self.width = width
self.bottleneck = bottleneck
self.cardinality = cardinality
w, b, c = width, bottleneck, cardinality
self.transitions = nn.ModuleList([conv3x3(3, w)])
for i in range(2):
self.transitions.append(
nn.Sequential(nn.AvgPool2d(2), ChannelPadding(w << i)))
self.stages = nn.ModuleList()
for i in range(3):
self.stages.append(nn.ModuleList())
for j in range(num_blocks):
self.stages[i].append(GrouppedBlock(w << i, w << i, b << i, c))
self.output_layer = nn.Sequential(nn.BatchNorm2d(w << 2),
nn.ReLU(inplace=True),
nn.AvgPool2d(8), View(-1),
nn.Linear(w << 2, num_classes))
if pretrained is not None:
assert num_copies > 0 and c % num_copies == 0
weights = np.concatenate([
np.random.uniform(size=(3, num_blocks, num_copies - 1)),
np.ones((3, num_blocks, 1))
],
axis=2)
weights = np.sort(weights)
for i in range(3):
for j in range(num_blocks):
for k in reversed(range(1, num_copies)):
weights[i, j, k] -= weights[i, j, k - 1]
self.weights = weights
print(weights)
c2 = c / num_copies
own_state = self.state_dict()
pretrained_state = torch.load(pretrained, map_location='cpu')
for name, param in pretrained_state.items():
if 'transitions' in name or 'output_layer' in name or 'bn1' in name:
own_state[name].copy_(param)
else:
_, i, j, _, _ = name.split('.')
i, j = int(i), int(j)
u = c2 * (b << i)
if 'conv3' not in name:
for k in range(num_copies):
own_state[name][k * u:(k + 1) * u].copy_(param)
else:
for k in range(num_copies):
own_state[name][:, k * u:(k + 1) * u].copy_(
param * weights[i, j, k])
def __init__(self, in_channels: int, out_channels: int):
super(FPNCenter, self).__init__()
self.conv = modules.conv3x3(in_channels, out_channels)
def __init__(self, in_channels, channels, out_channels):
super(Decoder, self).__init__()
self.conv1 = modules.conv3x3(in_channels, channels)
self.conv2 = modules.conv3x3(channels, out_channels)
self.s_att = attentions.sSE(out_channels)
self.c_att = attentions.cSE(out_channels, 16)
