def __init__(self,
img_shape,
latent_size,
z_dist="uniform",
z_std=1,
gen_type=1,
disc_type=1):
super().__init__()
self.img_shape = img_shape
self.latent_size = latent_size
self.z_dist = z_dist
self.z_std = z_std
if gen_type == 1:
self.generator = nn.Sequential(
nn.Linear(latent_size, 3 * 3 * 128),
nn.Unflatten(1, (128, 3, 3)), nn.BatchNorm2d(128,
momentum=0.8),
_deconv2(128, 64, 3, 1, 1, upsize=(7, 7), bn=True,
act="lrelu"),
_deconv2(64, 32, 3, 1, 1, 2, bn=True, act="lrelu"),
_deconv2(32, 16, 3, 1, 1, 2, bn=False, act=None),
_conv(16, 1, 3, 1, 1, False, None), nn.Tanh())
else:
self.generator = nn.Sequential(
nn.Linear(latent_size, 3 * 3 * 128),
nn.Unflatten(1, (128, 3, 3)), nn.BatchNorm2d(128,
momentum=0.8),
_deconv(128, 64, 3, 2, 0, 0, True, "lrelu"),
_deconv(64, 32, 3, 2, 1, 1, True, "lrelu"),
_deconv(32, 16, 3, 2, 1, 1, True, "lrelu"),
_conv(16, 1, 3, 1, 1, False, None), nn.Tanh())
if disc_type == 1:
self.discriminator = nn.Sequential(
_conv(1, 16, 3, 2, 1, False, "lrelu", 0.25), # --> 14x14
_conv(16, 32, 3, 2, 1, False, "lrelu", 0.25), # --> 7x7
_conv(32, 64, 3, 2, 1, False, "lrelu", 0.25), # --> 4x4
_conv(64, 128, 3, 2, 1, False, "lrelu", 0.25), # --> 2x2
nn.Flatten(),
nn.Linear(128 * 4, 1))
elif disc_type == 2:
self.discriminator = nn.Sequential(
_conv(1, 16, 3, 2, 1, False, "lrelu", 0.25), # --> 14x14
_conv(16, 32, 3, 2, 1, False, "lrelu", 0.25), # --> 7x7
_conv(32, 64, 3, 2, 1, False, "lrelu", 0.25), # --> 4x4
_conv(64, 128, 3, 2, 1, False, "lrelu", 0.25), # --> 2x2
nn.AdaptiveMaxPool2d((1, 1)),
nn.Flatten(),
nn.Linear(128, 1))
else:
self.discriminator = nn.Sequential(
_conv(1, 16, 3, 2, 1, False, "lrelu", 0.25), # --> 14x14
_conv(16, 32, 3, 2, 1, False, "lrelu", 0.25), # --> 7x7
_conv(32, 64, 3, 2, 1, False, "lrelu", 0.25), # --> 4x4
_conv(64, 128, 3, 2, 1, False, "lrelu", 0.25), # --> 2x2
_conv(128, 1, 3, 1, 1, False, None), # --> 2x2
nn.AdaptiveAvgPool2d((1, 1)),
nn.Flatten(),
)
def __init__(self, data_shape, hidden_layers, latent_dim, n_classes):
super().__init__()
self.c = data_shape[1]
self.n = [8, 16, 32, 64, 128, 256][hidden_layers[0]:hidden_layers[1]]
self.flat_dim = self.n[-1] * (data_shape[-1] // 2 ** len(self.n)) ** 2
self.unflat_shape = (self.n[-1], data_shape[-1] // 2 ** len(self.n), data_shape[-1] // 2 ** len(self.n))
self.inflat = data_shape[2] * data_shape[3]
self.lable = nn.Sequential(
nn.Linear(n_classes, self.inflat),
nn.Unflatten(-1, (1, *data_shape[2:]))
)
self.encoder = nn.Sequential(
DownConv(self.c + 1, self.n[0]),
*[DownConv(self.n[i], self.n[i + 1]) for i in range(len(self.n) - 1)],
nn.Flatten(start_dim=1)
)
self.mu = nn.Linear(self.flat_dim, latent_dim)
self.logsig = nn.Linear(self.flat_dim, latent_dim)
self.decoder = nn.Sequential(
nn.Linear(latent_dim + self.inflat, self.flat_dim),
nn.Unflatten(-1, self.unflat_shape),
*[UpConv(self.n[i], self.n[i - 1]) for i in range(len(self.n) - 1, 0, -1)],
UpConv(self.n[0], self.c),
nn.Conv2d(in_channels=self.c, out_channels=self.c, kernel_size=3, padding=1),
nn.BatchNorm2d(self.c),
nn.Sigmoid()
)
def __init__(self, embedding_dim=1024):
super().__init__()
self.per_tile_actions = (5, 12)
self.mouse_action_size = (62, 62) + self.per_tile_actions
self.mouse_action_dim = reduce(mul, self.mouse_action_size, 1)
self.mouse_position = MapGenerator_62_62(embedding_dim)
self.sidebar_decoder = SidebarDecoder(
embedding_dim=embedding_dim, num_layers=2, out_dim=12
)
self.flatten = nn.Flatten()
self.mouse_unflatten = nn.Unflatten(-1, self.mouse_action_size)
self.sidebar_unflatten = nn.Unflatten(-1, (-1, self.sidebar_decoder.embedding_dim))
def __init__(self, channels, imsize, kern_size):
super().__init__()
impulse_size = imsize - kern_size + 1
self.softmax_impulse = nn.Sequential(
nn.Flatten(start_dim=2),
nn.Softmax(-1),
nn.Unflatten(dim=2, unflattened_size=(impulse_size, impulse_size))
)
self.softmax_feats = nn.Sequential(
nn.Flatten(start_dim=1),
nn.Softmax(dim=-1),
nn.Unflatten(1, (channels, kern_size, kern_size))
)
def build_dc_classifier():
"""
Build and return a PyTorch nn.Sequential model for the DCGAN discriminator implementing
the architecture in the notebook.
"""
model = None
############################################################################
# TODO: Implement build_dc_classifier. #
############################################################################
# Replace "pass" statement with your code
model = nn.Sequential(
nn.Unflatten(1, (1, 28, 28)),
nn.Conv2d(1, 32, 5, 1), #24
nn.LeakyReLU(),
nn.MaxPool2d(2, stride=2), #12
nn.Conv2d(32, 64, 5, 1), #8
nn.LeakyReLU(),
nn.MaxPool2d(2, 2), #4
nn.Flatten(),
nn.Linear(4 * 4 * 64, 4 * 4 * 64),
nn.LeakyReLU(),
nn.Linear(4 * 4 * 64, 1))
############################################################################
# END OF YOUR CODE #
############################################################################
return model
def build_dc_generator(noise_dim=NOISE_DIM):
"""
Build and return a PyTorch model implementing the DCGAN generator using
the architecture described above.
"""
##############################################################################
# TODO: Implement architecture #
# #
# HINT: nn.Sequential might be helpful. #
##############################################################################
# *****START OF YOUR CODE (DO NOT DELETE/MODIFY THIS LINE)*****
model = nn.Sequential(OrderedDict([
( 'a1', nn.Linear(noise_dim,1024) ),
( 'r1', nn.ReLU() ),
( 'b1', nn.BatchNorm1d(1024) ),
( 'a2', nn.Linear(1024,6272) ),
( 'r2', nn.ReLU() ),
( 'b2', nn.BatchNorm1d(6272) ),
( 'unflat', nn.Unflatten(1, (128,7,7)) ),
( 't3', nn.ConvTranspose2d(128, 64, 4, 2, 1) ),
( 'r3', nn.ReLU() ),
( 'b3', nn.BatchNorm2d(64) ),
( 't4', nn.ConvTranspose2d(64, 1, 4, 2, 1) ),
( 'tanh', nn.Tanh() ),
( 'flat', nn.Flatten(1,3) )
]))
return model
def __init__(self, encoded_space_dim, conv1_ch, conv2_ch, conv3_ch, fc_ch):
super().__init__()
### Linear section
self.decoder_lin = nn.Sequential(
# First linear layer
nn.Linear(encoded_space_dim, fc_ch),
nn.ReLU(True),
# Second linear layer
nn.Linear(fc_ch, 2 * 2 * conv3_ch),
nn.ReLU(True)
)
### Unflatten
self.unflatten = nn.Unflatten(dim=1, unflattened_size=(conv3_ch, 2, 2))
### Convolutional section
self.decoder_conv = nn.Sequential(
# First transposed convolution
nn.ConvTranspose2d(conv3_ch, conv2_ch, 3, stride=1, output_padding=0),
nn.ReLU(True),
# Second transposed convolution
nn.ConvTranspose2d(conv2_ch, conv1_ch, 3, stride=1, padding=1, output_padding=0),
nn.ReLU(True),
# Third transposed convolution
nn.ConvTranspose2d(conv1_ch, 4, 3, stride=1, padding=1, output_padding=0)
)
def __init__(self):
super().__init__()
self.latent_size = fc_layers[-1]
new_h2, new_w2 = new_h, new_w # used to determin
layers = []
if len(fc_layers) > 1:
layers.append(MLP(list(reversed(fc_layers)), nn.ReLU, nn.ReLU))
layers.append(nn.BatchNorm1d(new_h2 * new_w2 * channels[-1]))
layers.append(nn.Unflatten(1, (channels[-1], new_h2, new_w2)))
for i, (new_c, old_c, filter_size, stride,
expand_ratio) in reversed(
list(
enumerate(
zip((c, ) + channels[:-1], channels,
filter_sizes, strides, expand_ratios)))):
if stride != 1:
new_h2 = new_h2 * stride - 1
new_w2 = new_w2 * stride - 1
layers.append(
TransposedInvertedResidual(
old_c,
new_c,
stride,
expand_ratio,
filter_size,
norm_layer=nn.Identity if i == 0 else norm_layer))
layers.append(nn.Tanh())
if new_h2 != h or new_w2 != w:
layers.append(Interpolate((h, w)))
self.model = nn.Sequential(*layers)
def __init__(self):
super().__init__()
self.latent_size = fc_layers[-1]
layers = []
if len(fc_layers) > 1:
layers.append(MLP(list(reversed(fc_layers)), nn.ReLU, nn.ReLU))
layers.append(nn.BatchNorm1d(new_h * new_w * channels[-1]))
layers.append(nn.Unflatten(1, (channels[-1], new_h, new_w)))
for i, (new_c, old_c, filter_size, pool, stride) in reversed(
list(
enumerate(
zip((c, ) + channels[:-1], channels, filter_sizes,
pools, strides)))):
if pool != 1:
layers.append(
nn.Upsample(scale_factor=pool, mode="bilinear"))
layers.append(
nn.ConvTranspose2d(old_c,
new_c,
filter_size,
stride=stride))
if i != 0: # no relu and batchnorm in last layer
layers.append(nn.ReLU())
layers.append(norm_layer(new_c))
layers.append(nn.Tanh())
layers.append(Interpolate((h, w))) #
self.model = nn.Sequential(*layers)
def __init__(
self,
embedding_size: int,
n_instructions: int,
encoded_question_size: int,
):
super().__init__()
# hardcode max seq len value, all questions in (my version of) clevr are
# 41 tokens at most
self.max_seq_len = 50
self.encoded_question_size = encoded_question_size
self.encoder = nn.Sequential(
nn.Flatten(start_dim=1, end_dim=2),
nn.Linear(self.max_seq_len * embedding_size,
self.max_seq_len * embedding_size),
nn.ReLU(),
nn.Linear(self.max_seq_len * embedding_size,
encoded_question_size),
nn.ReLU(),
)
self.decoder = nn.Sequential(
nn.Linear(encoded_question_size, encoded_question_size),
nn.ReLU(),
nn.Linear(encoded_question_size, n_instructions * embedding_size),
nn.Unflatten(dim=1,
unflattened_size=(n_instructions, embedding_size)),
)
def build_dc_generator(noise_dim=NOISE_DIM):
"""
Build and return a PyTorch model implementing the DCGAN generator using
the architecture described above.
"""
model = nn.Sequential(
############################################################################
# TODO: Implement build_dc_generator. #
############################################################################
# Replace "pass" statement with your code
nn.Linear(noise_dim, 1024),
nn.ReLU(),
nn.BatchNorm1d(1024),
nn.Linear(1024, 6272), # 7*7*128 = 6272
nn.ReLU(),
nn.BatchNorm1d(
6272), # We should do BatchNorm1d(F) for an input of (N,F)
nn.Unflatten(1, (128, 7, 7)),
nn.ConvTranspose2d(128, 64, 4, stride=2,
padding=1), # output will be 14x14
nn.ReLU(),
nn.BatchNorm2d(
64), # We should do BatchNorm2d(C) for an input of (N,C,H,W)
nn.ConvTranspose2d(64, 1, 4, stride=2,
padding=1), # output will be 28x28
nn.Tanh(),
nn.Flatten()
############################################################################
# END OF YOUR CODE #
############################################################################
)
return model
def build_dc_classifier():
"""
Build and return a PyTorch model for the DCGAN discriminator implementing
the architecture above.
"""
model = nn.Sequential(
############################################################################
# TODO: Implement build_dc_classifier. #
############################################################################
# Replace "pass" statement with your code
nn.Unflatten(1, (1, 28, 28)),
nn.Conv2d(1, 32, 5),
nn.LeakyReLU(negative_slope=0.01),
nn.MaxPool2d(2, stride=2),
nn.Conv2d(32, 64, 5),
nn.LeakyReLU(negative_slope=0.01),
nn.MaxPool2d(2, stride=2),
nn.Flatten(),
nn.Linear(1024, 1024),
nn.LeakyReLU(negative_slope=0.01),
nn.Linear(1024, 1)
############################################################################
# END OF YOUR CODE #
############################################################################
)
return model
def __init__(self,
img_size: tp.Tuple,
scale: int,
mode: str,
in_channels: int,
hidden_channels: int,
out_channels: int,
groups=1):
super().__init__()
self.img_size = img_size # img_orig_shape // patch_size
if mode == "up":
interpolation_conv = nn.ConvTranspose2d
elif mode == "down":
assert img_size[0] % scale == img_size[1] % scale == 0
interpolation_conv = nn.Conv2d
else:
raise Exception("Wrong mode")
self.engine = nn.Sequential(
nn.Unflatten(2, torch.Size(img_size)),
interpolation_conv(in_channels=in_channels,
out_channels=hidden_channels,
kernel_size=(scale, scale),
stride=(scale, scale),
padding=(0, 0),
dilation=(1, 1),
bias=False), #maybe nn interpolate is better
nn.Conv2d(
hidden_channels,
out_channels,
kernel_size=(3, 3),
stride=(1, 1),
padding=(1, 1),
bias=False,
groups=groups,
))
def __init__(self, config=reassemble_config, index=3, use_bn=False):
super(Reassemble, self).__init__()
img_size, input_features, features, s, output_features = (
config["img_size"],
config["input_features"],
config["features"][index],
config["s"][index],
config["output_features"],
)
last_layer = nn.Identity()
if s < 16:
last_layer = nn.ConvTranspose2d(features,
features,
16 // s,
stride=16 // s)
elif s > 16:
last_layer = nn.Conv2d(features,
features,
3,
stride=s // 16,
padding=1)
self.conv = nn.Sequential(
Transpose(1, 2),
nn.Unflatten(2, torch.Size([img_size[0] // 16,
img_size[1] // 16])),
nn.Conv2d(input_features, features, 1, stride=1, padding=0),
nn.ReLU(inplace=False),
nn.BatchNorm2d(features) if use_bn else nn.Identity(),
last_layer,
nn.ReLU(inplace=False),
nn.BatchNorm2d(features) if use_bn else nn.Identity(),
)
self.out = nn.Conv2d(features, output_features, 3, 1, 1, bias=False)
def __init__(self, hidden_dim=128):
super(Generator, self).__init__()
self.model = nn.Sequential(
nn.Unflatten(1,
(hidden_dim, 1, 1, 1)), # 1x1x1 (поменяли 1 на 64 ())
nn.Upsample(
size=(3, 4, 3),
mode='trilinear',
), #3x4x3
nn.Conv3d(hidden_dim, hidden_dim, kernel_size=3, padding=1),
nn.LeakyReLU(0.2),
nn.BatchNorm3d(hidden_dim),
nn.Upsample(size=(7, 8, 7), mode='trilinear'), #3x4x3
nn.Conv3d(hidden_dim, hidden_dim, kernel_size=3, padding=1),
nn.LeakyReLU(0.2),
nn.BatchNorm3d(hidden_dim),
nn.Upsample(size=(14, 17, 14), mode='trilinear'), #3x4x3
nn.Conv3d(hidden_dim, hidden_dim, kernel_size=3, padding=1),
nn.LeakyReLU(0.2),
nn.BatchNorm3d(hidden_dim),
nn.Upsample(size=(29, 35, 29), mode='trilinear'), #3x4x3
nn.Conv3d(hidden_dim, hidden_dim, kernel_size=3, padding=1),
nn.LeakyReLU(0.2),
nn.BatchNorm3d(hidden_dim),
nn.Upsample(size=(58, 70, 58), mode='trilinear'), #3x4x3
nn.Conv3d(hidden_dim, hidden_dim, kernel_size=3, padding=1),
nn.LeakyReLU(0.2),
nn.BatchNorm3d(hidden_dim),
nn.Conv3d(hidden_dim, 1, kernel_size=3, padding=1),
)
def build_dc_generator(noise_dim=NOISE_DIM):
"""
Build and return a PyTorch model implementing the DCGAN generator using
the architecture described above.
"""
##############################################################################
# TODO: Implement architecture #
# #
# HINT: nn.Sequential might be helpful. #
##############################################################################
# *****START OF YOUR CODE (DO NOT DELETE/MODIFY THIS LINE)*****
model =nn.Sequential(
nn.Linear(noise_dim,1024),
nn.ReLU(),
nn.BatchNorm1d(1024),
nn.Linear(1024, 7*7*128),
nn.ReLU(),
nn.BatchNorm1d(7*7*128),
nn.Unflatten(1,(128,7,7)),
nn.ConvTranspose2d(128,64,4,stride=2,padding=1),
nn.ReLU(),
nn.BatchNorm2d(64),
nn.ConvTranspose2d(64,1,4,stride=2,padding=1),
nn.Tanh(),
nn.Flatten()
)
return model
def __init__(self):
super(ConvAutoEncoderTwo, self).__init__()
self.encoder = nn.Sequential(OrderedDict([
('conv_1', nn.Conv2d(3, 16, 4, padding=1)),
('relu_1', nn.ReLU(True)),
('pooling_1', nn.MaxPool2d(2, 2)),
('conv_2', nn.Conv2d(16, 4, 3, padding=1)),
('relu_2', nn.ReLU(True)),
('pooling_2', nn.MaxPool2d(2, 2)),
('conv_3', nn.Conv2d(4, 4, 3, padding=1)),
('relu_3', nn.ReLU(True)),
('pooling_3', nn.MaxPool2d(2, 2)),
('conv_4', nn.Conv2d(4, 4, 3, padding=1)),
('relu_4', nn.ReLU(True)),
('pooling_4', nn.MaxPool2d(2, 2)),
('flatten', nn.Flatten()),
('dense', nn.Linear(4 * 13 * 13, 10))
]))
self.decoder = nn.Sequential(
nn.Linear(10, 4 * 13 * 13),
nn.Unflatten(1, (4, 13, 13)),
nn.MaxUnpool2d(self.encoder.pooling_4.size()),
nn.Conv2d(4, 4, 3, stride=2),
nn.ReLU(True),
nn.MaxUnpool2d(self.encoder.pooling_3.size()),
nn.Conv2d(4, 4, 3, stride=2),
nn.ReLU(True),
nn.MaxUnpool2d(self.encoder.pooling_2.size()),
nn.Conv2d(16, 4, 3, padding=1),
nn.ReLU(True),
nn.MaxUnpool2d(self.encoder.pooling_1.size()),
nn.Conv2d(3, 16, 4, padding=1)
)
def __init__(self):
super().__init__()
self.latent_size = fc_layers[-1]
new_h2, new_w2 = new_h, new_w
layers = []
inv_stacks = []
if len(fc_layers) > 1: # fully connected layers
layers.append(MLP(list(reversed(fc_layers)), nn.ReLU, nn.ReLU))
layers.append(nn.BatchNorm1d(new_h2 * new_w2 * channels[-1]))
layers.append(nn.Unflatten(1, (channels[-1], new_h2, new_w2)))
for i, (new_c, old_c, filter_size, pool) in reversed(
list(
enumerate(
zip((c, ) + channels[:-1], channels, filter_sizes,
pools)))):
inv_stacks.append(len(layers))
if pool != 1:
new_h2 *= pool
new_w2 *= pool
layers.append(
nn.Upsample(scale_factor=pool, mode="bilinear"))
layers.append(nn.ConvTranspose2d(old_c, new_c, filter_size))
new_h2 += filter_size - 1
new_w2 += filter_size - 1
if i != 0: # only if not last layer
layers.append(nn.ReLU())
layers.append(nn.BatchNorm2d(new_c))
layers.append(nn.Tanh())
if new_h2 != h or new_w2 != w:
layers.append(Interpolate((h, w)))
self.stacks = []
for i in reversed(inv_stacks):
self.stacks.append(nn.Sequential(*layers[i:]))
self.model = nn.Sequential(*layers)
def __init__(self):
super(ConvAutoEncoder, self).__init__()
self.encoder = nn.Sequential(
nn.Conv2d(3, 16, 4, padding=1),
nn.ReLU(True),
nn.MaxPool2d(2, 2),
nn.Conv2d(16, 4, 3, padding=1),
nn.ReLU(True),
nn.MaxPool2d(2, 2),
nn.Conv2d(4, 4, 3, padding=1),
nn.ReLU(True),
nn.MaxPool2d(2, 2),
nn.Conv2d(4, 4, 3, padding=1),
nn.ReLU(True),
nn.MaxPool2d(2, 2),
nn.Flatten(),
nn.Linear(4 * 13 * 13, 10)
)
self.decoder = nn.Sequential(
nn.Linear(10, 4 * 13 * 13),
nn.Unflatten(1, (4, 13, 13)),
nn.ConvTranspose2d(4, 4, 3, stride=2),
nn.ReLU(True),
nn.ConvTranspose2d(4, 4, 3, stride=2),
nn.ReLU(True),
nn.ConvTranspose2d(4, 16, 3, stride=2),
nn.ReLU(True),
nn.ConvTranspose2d(16, 3, 4, stride=2),
nn.Sigmoid()
)
def __init__(self, coding_size, img_channels=3, hidden_dims=(16, 32, 16, 8, 2)):
super(AutoEncoder, self).__init__()
# encoder
self.MaxPool = nn.MaxPool2d(kernel_size=2, stride=2)
self.Conv1 = BasicConvBlock(ch_in=img_channels, ch_out=hidden_dims[0])
self.Conv2 = BasicConvBlock(ch_in=hidden_dims[0], ch_out=hidden_dims[1])
self.Conv3 = BasicConvBlock(ch_in=hidden_dims[1], ch_out=hidden_dims[2])
self.Conv4 = BasicConvBlock(ch_in=hidden_dims[2], ch_out=hidden_dims[3])
self.Conv5 = BasicConvBlock(ch_in=hidden_dims[3], ch_out=hidden_dims[4])
# decoder
self.Up5 = UpConvBlock(ch_in=hidden_dims[4], ch_out=hidden_dims[3])
self.Up4 = UpConvBlock(ch_in=hidden_dims[3], ch_out=hidden_dims[2])
self.Up3 = UpConvBlock(ch_in=hidden_dims[2], ch_out=hidden_dims[1])
self.Up2 = UpConvBlock(ch_in=hidden_dims[1], ch_out=hidden_dims[0])
self.Up1 = nn.Conv2d(hidden_dims[0], img_channels, kernel_size=1, stride=1, padding=0)
self.encoder = nn.Sequential(*[self.Conv1, self.MaxPool, self.Conv2, self.MaxPool,
self.Conv3, self.MaxPool, self.Conv4, self.MaxPool, self.Conv5, nn.Flatten(),
nn.Linear(392, coding_size)])
self.decoder = nn.Sequential(
*[nn.Linear(coding_size, 392), nn.Unflatten(1, (2, 14, 14)), self.Up5, self.Up4, self.Up3, self.Up2,
self.Up1])
init_weights(self.encoder)
init_weights(self.decoder)
def build_dc_generator(noise_dim=NOISE_DIM):
"""
Build and return a PyTorch nn.Sequential model implementing the DCGAN generator using
the architecture described in the notebook.
"""
model = None
############################################################################
# TODO: Implement build_dc_generator. #
############################################################################
# Replace "pass" statement with your code
model = torch.nn.Sequential(
nn.Linear(noise_dim, 1024),
nn.ReLU(),
nn.BatchNorm1d(1024),
nn.Linear(1024, 7 * 7 * 128),
nn.ReLU(),
nn.BatchNorm1d(7 * 7 * 128),
nn.Unflatten(-1, (128, 7, 7)),
nn.ConvTranspose2d(128, 64, (4, 4), stride=2,
padding=1), # (128, 7, 7) -> (64, 14, 14)
nn.ReLU(),
nn.BatchNorm2d(64),
nn.ConvTranspose2d(64, 1, (4, 4), stride=2,
padding=1), # (64, 14, 14) -> (1, 28, 28)
nn.Tanh(),
nn.Flatten())
############################################################################
# END OF YOUR CODE #
############################################################################
return model
def __init__(self):
super().__init__()
self.encoder = nn.Sequential(
# 28 x 28
nn.Conv2d(1, 4, kernel_size=5),
# 4 x 24 x 24
nn.ReLU(True),
nn.Conv2d(4, 8, kernel_size=5),
nn.ReLU(True),
# 8 x 20 x 20 = 3200
nn.Flatten(),
nn.Linear(3200, 10),
# 10
nn.Softmax())
self.decoder = nn.Sequential(
# 10
nn.Linear(10, 400),
# 400
nn.ReLU(True),
nn.Linear(400, 4000),
# 4000
nn.ReLU(True),
nn.Unflatten(1, (10, 20, 20)),
# 10 x 20 x 20
nn.ConvTranspose2d(10, 10, kernel_size=5),
# 24 x 24
nn.ConvTranspose2d(10, 1, kernel_size=5),
# 28 x 28
nn.Sigmoid())
def build_dc_classifier():
"""
Build and return a PyTorch nn.Sequential model for the DCGAN discriminator implementing
the architecture in the notebook.
"""
model = None
############################################################################
# TODO: Implement build_dc_classifier. #
############################################################################
# Replace "pass" statement with your code
# H' = 1 + (H + 2 * pad - HH) / stride
# W' = 1 + (W + 2 * pad - WW) / stride
model = torch.nn.Sequential(
nn.Unflatten(-1, (1, 28, 28)),
nn.Conv2d(1, 32, (5, 5), stride=1),
nn.LeakyReLU(0.1),
nn.MaxPool2d((2, 2), stride=2), # (32, 24, 24) -> (32, 12, 12)
nn.Conv2d(32, 64, (5, 5), stride=1), # (32, 12, 12) -> (64, 8, 8)
nn.LeakyReLU(0.1),
nn.MaxPool2d((2, 2), stride=2), # (32, 8, 8) -> (64, 4, 4)
nn.Flatten(),
nn.Linear(4 * 4 * 64, 4 * 4 * 64),
nn.LeakyReLU(0.1),
nn.Linear(4 * 4 * 64, 1))
############################################################################
# END OF YOUR CODE #
############################################################################
return model
def __init__(self, **config):
self.input_shape = config.get("input_shape", (10, ))
self.output_shape = config.get("output_shape", (1, 28, 28))
self.learning_rate = config.get("learning_rate", 0.01)
self.momentum = config.get("momentum", 0.5)
self.log_interval = config.get("log_interval", 10)
with self.setup(input_shape=self.input_shape,
output_shape=self.output_shape):
self.add_module("fn1", nn.Linear(self.size_of_last_layer, 400))
self.add_module("fn1_activation", nn.ReLU(True))
self.add_module("fn2", nn.Linear(self.size_of_last_layer, 4000))
self.add_module("fn2_activation", nn.ReLU(True))
conv1_shape = [
10, 20, 20
] # needs to mupltiply together to be the size of the previous layer (currently 4000)
conv2_size = 10
self.add_module("conv1_prep", nn.Unflatten(1, conv1_shape))
self.add_module(
"conv1",
nn.ConvTranspose2d(conv1_shape[0], conv2_size, kernel_size=5))
self.add_module("conv2",
nn.ConvTranspose2d(conv2_size, 1, kernel_size=5))
self.add_module("conv2_activation", nn.Sigmoid())
self.loss_function = nn.MSELoss()
self.optimizer = torch.optim.SGD(self.parameters(),
lr=self.learning_rate,
momentum=self.momentum)
def build_dc_generator(noise_dim=NOISE_DIM):
"""
Build and return a PyTorch nn.Sequential model implementing the DCGAN generator using
the architecture described in the notebook.
"""
model = None
############################################################################
# TODO: Implement build_dc_generator. #
############################################################################
# Replace "pass" statement with your code
model = nn.Sequential(
nn.Linear(in_features=noise_dim, out_features=1024),
nn.ReLU(),
nn.BatchNorm1d(1024),
nn.Linear(in_features=1024, out_features=7*7*128),
nn.ReLU(),
nn.BatchNorm1d(7*7*128),
nn.Unflatten(-1, (128, 7, 7)),
nn.ConvTranspose2d(in_channels=128, out_channels=64, kernel_size=4, stride=2, padding=1),
nn.ReLU(),
nn.BatchNorm2d(64),
nn.ConvTranspose2d(in_channels=64, out_channels=1, kernel_size=4, stride=2, padding=1),
nn.Tanh(),
nn.Flatten()
)
############################################################################
# END OF YOUR CODE #
############################################################################
return model
def build_dc_classifier():
"""
Build and return a PyTorch nn.Sequential model for the DCGAN discriminator implementing
the architecture in the notebook.
"""
model = None
############################################################################
# TODO: Implement build_dc_classifier. #
############################################################################
# Replace "pass" statement with your code
model = nn.Sequential(
nn.Unflatten(-1, (1, 28, 28)),
nn.Conv2d(in_channels=1, out_channels=32, kernel_size=5, stride=1),
nn.LeakyReLU(),
nn.MaxPool2d(kernel_size=2, stride=2),
nn.Conv2d(in_channels=32, out_channels=64, kernel_size=5, stride=1),
nn.LeakyReLU(),
nn.MaxPool2d(kernel_size=2, stride=2),
nn.Flatten(),
nn.Linear(in_features=4*4*64 , out_features=4*4*64),
nn.LeakyReLU(),
nn.Linear(in_features=4*4*64, out_features=1)
)
############################################################################
# END OF YOUR CODE #
############################################################################
return model
def __init__(
self,
hidden_dim,
image_size,
image_channels=3,
max_filters=512,
num_layers=4,
kernel_size=2,
stride=2,
padding=0,
latent_dim=128,
small_conv=False,
):
super(VAEGANDecoder, self).__init__()
if small_conv:
num_layers += 1
channel_sizes = self.calculate_channel_sizes(
image_channels, max_filters, num_layers
)
# Decoder
decoder_layers = nn.ModuleList()
# Feedforward/Dense Layer to expand our latent dimensions
decoder_layers.append(nn.Linear(latent_dim, hidden_dim))
# Unflatten to a shape of (Channels, Height, Width)
decoder_layers.append(nn.Unflatten(1, (max_filters, image_size, image_size)))
# Decoder Convolutions
for i, (out_channels, in_channels) in enumerate(channel_sizes[::-1]):
if small_conv and i == num_layers - 1:
# 1x1 Transposed Convolution
decoder_layers.append(
nn.ConvTranspose2d(
in_channels=in_channels,
out_channels=out_channels,
kernel_size=1,
stride=1,
padding=0,
)
)
else:
# Add Transposed Convolutional Layer
decoder_layers.append(
nn.ConvTranspose2d(
in_channels=in_channels,
out_channels=out_channels,
kernel_size=kernel_size,
stride=stride,
padding=padding,
bias=False,
)
)
# Batch Norm
decoder_layers.append(nn.BatchNorm2d(out_channels))
# ReLU if not final layer
if i != num_layers - 1:
decoder_layers.append(nn.ReLU())
# Sigmoid if final layer
else:
decoder_layers.append(nn.Sigmoid())
self.decoder = nn.Sequential(*decoder_layers)
def __init__(self, input_size, latent_size=15):
super(VAE, self).__init__()
self.input_size = input_size # H*W
self.latent_size = latent_size # Z
self.hidden_dim = None # H_d
self.encoder = None
self.mu_layer = None
self.logvar_layer = None
self.decoder = None
############################################################################################
# TODO: Implement the fully-connected encoder architecture described in the notebook. #
# Specifically, self.encoder should be a network that inputs a batch of input images of #
# shape (N, 1, H, W) into a batch of hidden features of shape (N, H_d). Set up #
# self.mu_layer and self.logvar_layer to be a pair of linear layers that map the hidden #
# features into estimates of the mean and log-variance of the posterior over the latent #
# vectors; the mean and log-variance estimates will both be tensors of shape (N, Z). #
############################################################################################
# Replace "pass" statement with your code
# Define the hidden dimension as shown in course's lecture example.
# Source: https://web.eecs.umich.edu/~justincj/slides/eecs498/498_FA2019_lecture20.pdf
# Slide: 12/120.
self.hidden_dim = 400
# Define the encoder: A three Linear+ReLU layers neural network.
self.encoder = nn.Sequential(
nn.Flatten(),
nn.Linear(self.input_size, self.hidden_dim),
nn.ReLU(),
nn.Linear(self.hidden_dim, self.hidden_dim),
nn.ReLU(),
nn.Linear(self.hidden_dim, self.hidden_dim),
nn.ReLU()
)
# Define the mu_layer, with input (N, H_d) and output (N, Z)
self.mu_layer = nn.Linear(self.hidden_dim, self.latent_size)
# Define the logvar_layer, with input (N, H_d) and output (N, Z)
self.logvar_layer = nn.Linear(self.hidden_dim, self.latent_size)
############################################################################################
# TODO: Implement the fully-connected decoder architecture described in the notebook. #
# Specifically, self.decoder should be a network that inputs a batch of latent vectors of #
# shape (N, Z) and outputs a tensor of estimated images of shape (N, 1, H, W). #
############################################################################################
# Replace "pass" statement with your code
self.decoder = nn.Sequential(
nn.Linear(self.latent_size, self.hidden_dim),
nn.ReLU(),
nn.Linear(self.hidden_dim, self.hidden_dim),
nn.ReLU(),
nn.Linear(self.hidden_dim, self.hidden_dim),
nn.ReLU(),
nn.Linear(self.hidden_dim, self.input_size),
nn.Sigmoid(),
nn.Unflatten(dim=1, unflattened_size=(1, 28, 28))
)
def __init__(self, input_size, num_classes=10, latent_size=15):
super(CVAE, self).__init__()
self.input_size = input_size # H*W
self.latent_size = latent_size # Z
self.num_classes = num_classes # C
self.hidden_dim = None # H_d
self.encoder = None
self.mu_layer = None
self.logvar_layer = None
self.decoder = None
############################################################################################
# TODO: Define a FC encoder as described in the notebook that transforms the image--after #
# flattening and now adding our one-hot class vector (N, H*W + C)--into a hidden_dimension # #
# (N, H_d) feature space, and a final two layers that project that feature space #
# to posterior mu and posterior log-variance estimates of the latent space (N, Z) #
############################################################################################
# Replace "pass" statement with your code
# Define the hidden dimension as shown in course's lecture example.
# Source: https://web.eecs.umich.edu/~justincj/slides/eecs498/498_FA2019_lecture20.pdf
# Slide: 12/120.
self.hidden_dim = 400
# Define the encoder: A three Linear+ReLU layers neural network.
# The encoder's input has shape of (N, H*W + C), i.e. The flattened images and their classes.
# Note that the concatenation (between images and classes) is done in the "forward" function.
self.encoder = nn.Sequential(
nn.Linear(self.input_size + self.num_classes, self.hidden_dim),
nn.ReLU(),
nn.Linear(self.hidden_dim, self.hidden_dim),
nn.ReLU(),
nn.Linear(self.hidden_dim, self.hidden_dim),
nn.ReLU()
)
# Define the mu_layer, with input (N, H_d) and output (N, Z)
self.mu_layer = nn.Linear(self.hidden_dim, self.latent_size)
# Define the logvar_layer, with input (N, H_d) and output (N, Z)
self.logvar_layer = nn.Linear(self.hidden_dim, self.latent_size)
############################################################################################
# TODO: Define a fully-connected decoder as described in the notebook that transforms the #
# latent space (N, Z + C) to the estimated images of shape (N, 1, H, W). #
############################################################################################
# Replace "pass" statement with your code
self.decoder = nn.Sequential(
nn.Linear(self.latent_size + self.num_classes, self.hidden_dim),
nn.ReLU(),
nn.Linear(self.hidden_dim, self.hidden_dim),
nn.ReLU(),
nn.Linear(self.hidden_dim, self.hidden_dim),
nn.ReLU(),
nn.Linear(self.hidden_dim, self.input_size),
nn.Sigmoid(),
nn.Unflatten(dim=1, unflattened_size=(1, 28, 28))
)
def ifft2d(n1: int,
n2: int,
normalized: bool = False,
br_first: bool = True,
with_br_perm: bool = True,
flatten=False) -> nn.Module:
""" Construct an nn.Module based on Butterfly that exactly performs the 2D iFFT.
Parameters:
n1: size of the iFFT on the last input dimension. Must be a power of 2.
n2: size of the iFFT on the second to last input dimension. Must be a power of 2.
normalized: if True, corresponds to the unitary iFFT (i.e. multiplied by 1/sqrt(n))
br_first: which decomposition of iFFT. True corresponds to decimation-in-frequency.
False corresponds to decimation-in-time.
with_br_perm: whether to return both the butterfly and the bit reversal permutation.
flatten: whether to combine the 2 butterflies into 1 with Kronecker product.
"""
b_ifft1 = ifft(n1,
normalized=normalized,
br_first=br_first,
with_br_perm=False)
b_ifft2 = ifft(n2,
normalized=normalized,
br_first=br_first,
with_br_perm=False)
b = TensorProduct(b_ifft1,
b_ifft2) if not flatten else butterfly_kronecker(
b_ifft1, b_ifft2)
if with_br_perm:
br_perm1 = FixedPermutation(
bitreversal_permutation(n1, pytorch_format=True))
br_perm2 = FixedPermutation(
bitreversal_permutation(n2, pytorch_format=True))
br_perm = (TensorProduct(br_perm1, br_perm2) if not flatten else
permutation_kronecker(br_perm1, br_perm2))
if not flatten:
return nn.Sequential(br_perm, b) if br_first else nn.Sequential(
b, br_perm)
else:
return (nn.Sequential(nn.Flatten(
start_dim=-2), br_perm, b, nn.Unflatten(-1, (n2, n1)))
if br_first else nn.Sequential(nn.Flatten(
start_dim=-2), b, br_perm, nn.Unflatten(-1, (n2, n1))))
else:
return b if not flatten else nn.Sequential(nn.Flatten(
start_dim=-2), b, nn.Unflatten(-1, (n2, n1)))