Upload 3 files
Browse files- TCGA_CS_6667_20011105_1.png +0 -0
- unet.pt +3 -0
- unet.py +98 -0
TCGA_CS_6667_20011105_1.png
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unet.pt
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version https://git-lfs.github.com/spec/v1
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oid sha256:265778b4608a9caa5bc5e534811950602334f146a745111722c4ced36f8c53ac
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size 31107237
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unet.py
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from collections import OrderedDict
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import torch
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import torch.nn as nn
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class UNet(nn.Module):
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def __init__(self, in_channels=3, out_channels=1, init_features=32):
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super(UNet, self).__init__()
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features = init_features
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self.encoder1 = UNet._block(in_channels, features, name="enc1")
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self.pool1 = nn.MaxPool2d(kernel_size=2, stride=2)
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self.encoder2 = UNet._block(features, features * 2, name="enc2")
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self.pool2 = nn.MaxPool2d(kernel_size=2, stride=2)
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self.encoder3 = UNet._block(features * 2, features * 4, name="enc3")
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self.pool3 = nn.MaxPool2d(kernel_size=2, stride=2)
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self.encoder4 = UNet._block(features * 4, features * 8, name="enc4")
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self.pool4 = nn.MaxPool2d(kernel_size=2, stride=2)
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self.bottleneck = UNet._block(features * 8, features * 16, name="bottleneck")
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self.upconv4 = nn.ConvTranspose2d(
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features * 16, features * 8, kernel_size=2, stride=2
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)
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self.decoder4 = UNet._block((features * 8) * 2, features * 8, name="dec4")
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self.upconv3 = nn.ConvTranspose2d(
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features * 8, features * 4, kernel_size=2, stride=2
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)
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self.decoder3 = UNet._block((features * 4) * 2, features * 4, name="dec3")
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self.upconv2 = nn.ConvTranspose2d(
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features * 4, features * 2, kernel_size=2, stride=2
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)
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self.decoder2 = UNet._block((features * 2) * 2, features * 2, name="dec2")
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self.upconv1 = nn.ConvTranspose2d(
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features * 2, features, kernel_size=2, stride=2
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)
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self.decoder1 = UNet._block(features * 2, features, name="dec1")
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self.conv = nn.Conv2d(
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in_channels=features, out_channels=out_channels, kernel_size=1
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)
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def forward(self, x):
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enc1 = self.encoder1(x)
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enc2 = self.encoder2(self.pool1(enc1))
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enc3 = self.encoder3(self.pool2(enc2))
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enc4 = self.encoder4(self.pool3(enc3))
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bottleneck = self.bottleneck(self.pool4(enc4))
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dec4 = self.upconv4(bottleneck)
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dec4 = torch.cat((dec4, enc4), dim=1)
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dec4 = self.decoder4(dec4)
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dec3 = self.upconv3(dec4)
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dec3 = torch.cat((dec3, enc3), dim=1)
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dec3 = self.decoder3(dec3)
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dec2 = self.upconv2(dec3)
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dec2 = torch.cat((dec2, enc2), dim=1)
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dec2 = self.decoder2(dec2)
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dec1 = self.upconv1(dec2)
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dec1 = torch.cat((dec1, enc1), dim=1)
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dec1 = self.decoder1(dec1)
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return torch.sigmoid(self.conv(dec1))
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@staticmethod
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def _block(in_channels, features, name):
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return nn.Sequential(
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OrderedDict(
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[
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(
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name + "conv1",
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nn.Conv2d(
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in_channels=in_channels,
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out_channels=features,
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kernel_size=3,
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padding=1,
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bias=False,
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),
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),
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(name + "norm1", nn.BatchNorm2d(num_features=features)),
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(name + "relu1", nn.ReLU(inplace=True)),
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(
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name + "conv2",
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nn.Conv2d(
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in_channels=features,
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out_channels=features,
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kernel_size=3,
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padding=1,
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bias=False,
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),
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),
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(name + "norm2", nn.BatchNorm2d(num_features=features)),
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(name + "relu2", nn.ReLU(inplace=True)),
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]
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)
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)
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