266 lines
11 KiB
Python
266 lines
11 KiB
Python
import torch
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import torch.nn as nn
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import torch.nn.functional as F
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from trainer.networks import register_model
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from utils.util import checkpoint, opt_get
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import torch_intermediary as ml
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class Discriminator_VGG_128(nn.Module):
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# input_img_factor = multiplier to support images over 128x128. Only certain factors are supported.
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def __init__(self, in_nc, nf, input_img_factor=1, extra_conv=False):
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super(Discriminator_VGG_128, self).__init__()
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# [64, 128, 128]
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self.conv0_0 = nn.Conv2d(in_nc, nf, 3, 1, 1, bias=True)
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self.conv0_1 = nn.Conv2d(nf, nf, 4, 2, 1, bias=False)
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self.bn0_1 = nn.BatchNorm2d(nf, affine=True)
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# [64, 64, 64]
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self.conv1_0 = nn.Conv2d(nf, nf * 2, 3, 1, 1, bias=False)
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self.bn1_0 = nn.BatchNorm2d(nf * 2, affine=True)
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self.conv1_1 = nn.Conv2d(nf * 2, nf * 2, 4, 2, 1, bias=False)
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self.bn1_1 = nn.BatchNorm2d(nf * 2, affine=True)
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# [128, 32, 32]
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self.conv2_0 = nn.Conv2d(nf * 2, nf * 4, 3, 1, 1, bias=False)
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self.bn2_0 = nn.BatchNorm2d(nf * 4, affine=True)
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self.conv2_1 = nn.Conv2d(nf * 4, nf * 4, 4, 2, 1, bias=False)
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self.bn2_1 = nn.BatchNorm2d(nf * 4, affine=True)
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# [256, 16, 16]
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self.conv3_0 = nn.Conv2d(nf * 4, nf * 8, 3, 1, 1, bias=False)
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self.bn3_0 = nn.BatchNorm2d(nf * 8, affine=True)
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self.conv3_1 = nn.Conv2d(nf * 8, nf * 8, 4, 2, 1, bias=False)
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self.bn3_1 = nn.BatchNorm2d(nf * 8, affine=True)
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# [512, 8, 8]
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self.conv4_0 = nn.Conv2d(nf * 8, nf * 8, 3, 1, 1, bias=False)
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self.bn4_0 = nn.BatchNorm2d(nf * 8, affine=True)
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self.conv4_1 = nn.Conv2d(nf * 8, nf * 8, 4, 2, 1, bias=False)
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self.bn4_1 = nn.BatchNorm2d(nf * 8, affine=True)
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final_nf = nf * 8
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self.extra_conv = extra_conv
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if self.extra_conv:
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self.conv5_0 = nn.Conv2d(nf * 8, nf * 16, 3, 1, 1, bias=False)
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self.bn5_0 = nn.BatchNorm2d(nf * 16, affine=True)
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self.conv5_1 = nn.Conv2d(nf * 16, nf * 16, 4, 2, 1, bias=False)
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self.bn5_1 = nn.BatchNorm2d(nf * 16, affine=True)
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input_img_factor = input_img_factor // 2
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final_nf = nf * 16
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self.linear1 = ml.Linear(final_nf * 4 * input_img_factor * 4 * input_img_factor, 100)
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self.linear2 = ml.Linear(100, 1)
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# activation function
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self.lrelu = nn.LeakyReLU(negative_slope=0.2, inplace=True)
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def forward(self, x):
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fea = self.lrelu(self.conv0_0(x))
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fea = self.lrelu(self.bn0_1(self.conv0_1(fea)))
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#fea = torch.cat([fea, skip_med], dim=1)
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fea = self.lrelu(self.bn1_0(self.conv1_0(fea)))
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fea = self.lrelu(self.bn1_1(self.conv1_1(fea)))
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#fea = torch.cat([fea, skip_lo], dim=1)
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fea = self.lrelu(self.bn2_0(self.conv2_0(fea)))
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fea = self.lrelu(self.bn2_1(self.conv2_1(fea)))
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fea = self.lrelu(self.bn3_0(self.conv3_0(fea)))
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fea = self.lrelu(self.bn3_1(self.conv3_1(fea)))
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fea = self.lrelu(self.bn4_0(self.conv4_0(fea)))
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fea = self.lrelu(self.bn4_1(self.conv4_1(fea)))
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if self.extra_conv:
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fea = self.lrelu(self.bn5_0(self.conv5_0(fea)))
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fea = self.lrelu(self.bn5_1(self.conv5_1(fea)))
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fea = fea.contiguous().view(fea.size(0), -1)
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fea = self.lrelu(self.linear1(fea))
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out = self.linear2(fea)
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return out
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@register_model
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def register_discriminator_vgg_128(opt_net, opt):
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return Discriminator_VGG_128(in_nc=opt_net['in_nc'], nf=opt_net['nf'], input_img_factor=opt_net['image_size'] / 128,
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extra_conv=opt_net['extra_conv'])
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class Discriminator_VGG_128_GN(nn.Module):
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# input_img_factor = multiplier to support images over 128x128. Only certain factors are supported.
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def __init__(self, in_nc, nf, input_img_factor=1, do_checkpointing=False, extra_conv=False):
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super(Discriminator_VGG_128_GN, self).__init__()
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self.do_checkpointing = do_checkpointing
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# [64, 128, 128]
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self.conv0_0 = nn.Conv2d(in_nc, nf, 3, 1, 1, bias=True)
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self.conv0_1 = nn.Conv2d(nf, nf, 4, 2, 1, bias=False)
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self.bn0_1 = nn.GroupNorm(8, nf, affine=True)
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# [64, 64, 64]
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self.conv1_0 = nn.Conv2d(nf, nf * 2, 3, 1, 1, bias=False)
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self.bn1_0 = nn.GroupNorm(8, nf * 2, affine=True)
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self.conv1_1 = nn.Conv2d(nf * 2, nf * 2, 4, 2, 1, bias=False)
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self.bn1_1 = nn.GroupNorm(8, nf * 2, affine=True)
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# [128, 32, 32]
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self.conv2_0 = nn.Conv2d(nf * 2, nf * 4, 3, 1, 1, bias=False)
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self.bn2_0 = nn.GroupNorm(8, nf * 4, affine=True)
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self.conv2_1 = nn.Conv2d(nf * 4, nf * 4, 4, 2, 1, bias=False)
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self.bn2_1 = nn.GroupNorm(8, nf * 4, affine=True)
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# [256, 16, 16]
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self.conv3_0 = nn.Conv2d(nf * 4, nf * 8, 3, 1, 1, bias=False)
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self.bn3_0 = nn.GroupNorm(8, nf * 8, affine=True)
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self.conv3_1 = nn.Conv2d(nf * 8, nf * 8, 4, 2, 1, bias=False)
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self.bn3_1 = nn.GroupNorm(8, nf * 8, affine=True)
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# [512, 8, 8]
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self.conv4_0 = nn.Conv2d(nf * 8, nf * 8, 3, 1, 1, bias=False)
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self.bn4_0 = nn.GroupNorm(8, nf * 8, affine=True)
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self.conv4_1 = nn.Conv2d(nf * 8, nf * 8, 4, 2, 1, bias=False)
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self.bn4_1 = nn.GroupNorm(8, nf * 8, affine=True)
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self.extra_conv = extra_conv
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if extra_conv:
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self.conv5_0 = nn.Conv2d(nf * 8, nf * 8, 3, 1, 1, bias=False)
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self.bn5_0 = nn.GroupNorm(8, nf * 8, affine=True)
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self.conv5_1 = nn.Conv2d(nf * 8, nf * 8, 4, 2, 1, bias=False)
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self.bn5_1 = nn.GroupNorm(8, nf * 8, affine=True)
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input_img_factor = input_img_factor / 2
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final_nf = nf * 8
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# activation function
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self.lrelu = nn.LeakyReLU(negative_slope=0.2, inplace=True)
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self.linear1 = ml.Linear(int(final_nf * 4 * input_img_factor * 4 * input_img_factor), 100)
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self.linear2 = ml.Linear(100, 1)
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def compute_body(self, x):
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fea = self.lrelu(self.conv0_0(x))
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fea = self.lrelu(self.bn0_1(self.conv0_1(fea)))
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#fea = torch.cat([fea, skip_med], dim=1)
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fea = self.lrelu(self.bn1_0(self.conv1_0(fea)))
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fea = self.lrelu(self.bn1_1(self.conv1_1(fea)))
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#fea = torch.cat([fea, skip_lo], dim=1)
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fea = self.lrelu(self.bn2_0(self.conv2_0(fea)))
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fea = self.lrelu(self.bn2_1(self.conv2_1(fea)))
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fea = self.lrelu(self.bn3_0(self.conv3_0(fea)))
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fea = self.lrelu(self.bn3_1(self.conv3_1(fea)))
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fea = self.lrelu(self.bn4_0(self.conv4_0(fea)))
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fea = self.lrelu(self.bn4_1(self.conv4_1(fea)))
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if self.extra_conv:
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fea = self.lrelu(self.bn5_0(self.conv5_0(fea)))
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fea = self.lrelu(self.bn5_1(self.conv5_1(fea)))
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return fea
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def forward(self, x):
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if self.do_checkpointing:
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fea = checkpoint(self.compute_body, x)
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else:
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fea = self.compute_body(x)
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fea = fea.contiguous().view(fea.size(0), -1)
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fea = self.lrelu(self.linear1(fea))
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out = self.linear2(fea)
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return out
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@register_model
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def register_discriminator_vgg_128_gn(opt_net, opt):
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return Discriminator_VGG_128_GN(in_nc=opt_net['in_nc'], nf=opt_net['nf'],
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input_img_factor=opt_net['image_size'] / 128,
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extra_conv=opt_get(opt_net, ['extra_conv'], False),
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do_checkpointing=opt_get(opt_net, ['do_checkpointing'], False))
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class DiscriminatorVGG448GN(nn.Module):
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# input_img_factor = multiplier to support images over 128x128. Only certain factors are supported.
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def __init__(self, in_nc, nf, do_checkpointing=False):
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super().__init__()
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self.do_checkpointing = do_checkpointing
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# 448x448
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self.convn1_0 = nn.Conv2d(in_nc, nf // 2, 3, 1, 1, bias=True)
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self.convn1_1 = nn.Conv2d(nf // 2, nf // 2, 4, 2, 1, bias=False)
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self.bnn1_1 = nn.GroupNorm(8, nf // 2, affine=True)
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# 224x224 (new head)
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self.conv0_0_new = nn.Conv2d(nf // 2, nf, 3, 1, 1, bias=False)
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self.bn0_0 = nn.GroupNorm(8, nf, affine=True)
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# 224x224 (old head)
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self.conv0_0 = nn.Conv2d(in_nc, nf, 3, 1, 1, bias=True) # Unused.
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self.conv0_1 = nn.Conv2d(nf, nf, 4, 2, 1, bias=False)
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self.bn0_1 = nn.GroupNorm(8, nf, affine=True)
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# 112x112
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self.conv1_0 = nn.Conv2d(nf, nf * 2, 3, 1, 1, bias=False)
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self.bn1_0 = nn.GroupNorm(8, nf * 2, affine=True)
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self.conv1_1 = nn.Conv2d(nf * 2, nf * 2, 4, 2, 1, bias=False)
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self.bn1_1 = nn.GroupNorm(8, nf * 2, affine=True)
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# 56x56
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self.conv2_0 = nn.Conv2d(nf * 2, nf * 4, 3, 1, 1, bias=False)
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self.bn2_0 = nn.GroupNorm(8, nf * 4, affine=True)
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self.conv2_1 = nn.Conv2d(nf * 4, nf * 4, 4, 2, 1, bias=False)
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self.bn2_1 = nn.GroupNorm(8, nf * 4, affine=True)
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# 28x28
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self.conv3_0 = nn.Conv2d(nf * 4, nf * 8, 3, 1, 1, bias=False)
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self.bn3_0 = nn.GroupNorm(8, nf * 8, affine=True)
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self.conv3_1 = nn.Conv2d(nf * 8, nf * 8, 4, 2, 1, bias=False)
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self.bn3_1 = nn.GroupNorm(8, nf * 8, affine=True)
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# 14x14
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self.conv4_0 = nn.Conv2d(nf * 8, nf * 8, 3, 1, 1, bias=False)
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self.bn4_0 = nn.GroupNorm(8, nf * 8, affine=True)
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self.conv4_1 = nn.Conv2d(nf * 8, nf * 8, 4, 2, 1, bias=False)
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self.bn4_1 = nn.GroupNorm(8, nf * 8, affine=True)
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# out: 7x7
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# activation function
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self.lrelu = nn.LeakyReLU(negative_slope=0.2, inplace=True)
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final_nf = nf * 8
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self.linear1 = ml.Linear(int(final_nf * 7 * 7), 100)
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self.linear2 = ml.Linear(100, 1)
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# Assign all new heads to the new param group.2
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for m in [self.convn1_0, self.convn1_1, self.bnn1_1, self.conv0_0_new, self.bn0_0]:
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for p in m.parameters():
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p.PARAM_GROUP = 'new_head'
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def compute_body(self, x):
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fea = self.lrelu(self.convn1_0(x))
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fea = self.lrelu(self.bnn1_1(self.convn1_1(fea)))
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fea = self.lrelu(self.bn0_0(self.conv0_0_new(fea)))
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# fea = self.lrelu(self.conv0_0(x)) <- replaced
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fea = self.lrelu(self.bn0_1(self.conv0_1(fea)))
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fea = self.lrelu(self.bn1_0(self.conv1_0(fea)))
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fea = self.lrelu(self.bn1_1(self.conv1_1(fea)))
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fea = self.lrelu(self.bn2_0(self.conv2_0(fea)))
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fea = self.lrelu(self.bn2_1(self.conv2_1(fea)))
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fea = self.lrelu(self.bn3_0(self.conv3_0(fea)))
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fea = self.lrelu(self.bn3_1(self.conv3_1(fea)))
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fea = self.lrelu(self.bn4_0(self.conv4_0(fea)))
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fea = self.lrelu(self.bn4_1(self.conv4_1(fea)))
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return fea
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def forward(self, x):
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if self.do_checkpointing:
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fea = checkpoint(self.compute_body, x)
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else:
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fea = self.compute_body(x)
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fea = fea.contiguous().view(fea.size(0), -1)
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fea = self.lrelu(self.linear1(fea))
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out = self.linear2(fea)
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return out
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@register_model
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def register_discriminator_vgg_448(opt_net, opt):
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return DiscriminatorVGG448GN(in_nc=opt_net['in_nc'], nf=opt_net['nf'])
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