def __init__(self,
in_channels,
out_channels,
kernel_size=3,
stride=1,
groups=1):
super(ConvBNReLU, self).__init__()
padding = (kernel_size - 1) // 2
if groups == 1:
conv = layers.Conv2d(in_channels,
out_channels,
kernel_size,
stride,
pad_mode='pad',
padding=padding)
else:
conv = layers.Conv2d(in_channels,
in_channels,
kernel_size,
stride,
pad_mode='pad',
padding=padding,
group=in_channels)
self.features = layers.SequentialLayer(
[conv, layers.BatchNorm2d(out_channels),
layers.ReLU6()])
def __init__(self,
in_planes=3,
ndf=64,
n_layers=3,
alpha=0.2,
norm_mode='batch'):
super(Discriminator, self).__init__()
kernel_size = 4
layer_list = [
layers.Conv2d(in_planes,
ndf,
kernel_size,
2,
pad_mode='pad',
padding=1),
layers.LeakyReLU(alpha)
]
nf_mult = ndf
for i in range(1, n_layers):
nf_mult_prev = nf_mult
nf_mult = min(2**i, 8) * ndf
layer_list.append(
ConvNormReLU(nf_mult_prev,
nf_mult,
kernel_size,
2,
alpha,
norm_mode,
padding=1))
nf_mult_prev = nf_mult
nf_mult = min(2**n_layers, 8) * ndf
layer_list.append(
ConvNormReLU(nf_mult_prev,
nf_mult,
kernel_size,
1,
alpha,
norm_mode,
padding=1))
layer_list.append(
layers.Conv2d(nf_mult,
1,
kernel_size,
1,
pad_mode='pad',
padding=1))
self.features = layers.SequentialLayer(layer_list)
def __init__(self,
in_planes=3,
ngf=64,
n_layers=9,
alpha=0.2,
norm_mode='batch',
dropout=True,
pad_mode="CONSTANT"):
super(ResNetGenerator, self).__init__()
self.conv_in = ConvNormReLU(in_planes,
ngf,
7,
1,
alpha=alpha,
norm_mode=norm_mode,
pad_mode=pad_mode)
self.down_1 = ConvNormReLU(ngf, ngf * 2, 3, 2, alpha, norm_mode)
self.down_2 = ConvNormReLU(ngf * 2, ngf * 4, 3, 2, alpha, norm_mode)
layer_list = [
ResidualBlock(
ngf * 4, norm_mode, dropout=dropout, pad_mode=pad_mode)
] * n_layers
self.residuals = layers.SequentialLayer(layer_list)
self.up_2 = ConvTransposeNormReLU(ngf * 4, ngf * 2, 3, 2, alpha,
norm_mode)
self.up_1 = ConvTransposeNormReLU(ngf * 2, ngf, 3, 2, alpha, norm_mode)
if pad_mode == "CONSTANT":
self.conv_out = layers.Conv2d(ngf,
3,
kernel_size=7,
stride=1,
pad_mode='pad',
padding=3)
else:
pad = layers.Pad(paddings=((0, 0), (0, 0), (3, 3), (3, 3)),
mode=pad_mode)
conv = layers.Conv2d(ngf,
3,
kernel_size=7,
stride=1,
pad_mode='pad')
self.conv_out = layers.SequentialLayer([pad, conv])
self.activate = Tanh()
def _conv5x5(in_channel, out_channel, stride=1):
weight_shape = (out_channel, in_channel, 5, 5)
weight = _weight_variable(weight_shape)
return layers.Conv2d(in_channel,
out_channel,
kernel_size=5,
stride=stride,
padding=2,
pad_mode='pad',
weight_init=weight)
def _conv7x7(in_channel, out_channel, stride=1):
weight_shape = (out_channel, in_channel, 7, 7)
weight = _weight_variable(weight_shape)
return layers.Conv2d(in_channel,
out_channel,
kernel_size=7,
stride=stride,
padding=0,
pad_mode='same',
weight_init=weight)
def __init__(self,
in_planes,
out_planes,
kernel_size=4,
stride=2,
alpha=0.2,
norm_mode='batch',
pad_mode='CONSTANT',
use_relu=True,
padding=None):
super(ConvNormReLU, self).__init__()
self.norm = layers.BatchNorm2d(out_planes)
if norm_mode == 'instance':
# Use BatchNorm2d with batchsize=1, affine=False, training=True instead of InstanceNorm2d
norm = layers.BatchNorm2d(out_planes, affine=False)
has_bias = (norm_mode == 'instance')
if padding is None:
padding = (kernel_size - 1) // 2
if pad_mode == 'CONSTANT':
conv = layers.Conv2d(in_planes,
out_planes,
kernel_size,
stride,
pad_mode='pad',
has_bias=has_bias,
padding=padding)
layer_list = [conv, norm]
else:
paddings = ((0, 0), (0, 0), (padding, padding), (padding, padding))
pad = layers.Pad(paddings=paddings, mode=pad_mode)
conv = layers.Conv2d(in_planes,
out_planes,
kernel_size,
stride,
pad_mode='pad',
has_bias=has_bias)
layer_list = [pad, conv, norm]
if use_relu:
relu = layers.ReLU()
if alpha > 0:
relu = layers.LeakyReLU(alpha)
layer_list.append(relu)
self.features = layers.SequentialLayer(layer_list)
def test_sequential():
context.set_context(mode=context.GRAPH_MODE, device_target="CPU")
net = layers.SequentialLayer([
layers.Conv2d(1, 6, 5, pad_mode='valid', weight_init="ones"),
layers.ReLU(),
layers.MaxPool2d(kernel_size=2, stride=2)
])
model = Model(net)
model.compile()
z = model.predict(ts.ones((1, 1, 32, 32)))
print(z.asnumpy())
def __init__(self, outer_nc, inner_nc, in_planes=None, dropout=False,
submodule=None, outermost=False, innermost=False, alpha=0.2, norm_mode='batch'):
super(UnetSkipConnectionBlock, self).__init__()
downnorm = layers.BatchNorm2d(inner_nc)
upnorm = layers.BatchNorm2d(outer_nc)
use_bias = False
if norm_mode == 'instance':
downnorm = layers.BatchNorm2d(inner_nc, affine=False)
upnorm = layers.BatchNorm2d(outer_nc, affine=False)
use_bias = True
if in_planes is None:
in_planes = outer_nc
downconv = layers.Conv2d(in_planes, inner_nc, kernel_size=4,
stride=2, padding=1, has_bias=use_bias, pad_mode='pad')
downrelu = layers.LeakyReLU(alpha)
uprelu = layers.ReLU()
if outermost:
upconv = layers.Conv2dTranspose(inner_nc * 2, outer_nc,
kernel_size=4, stride=2,
padding=1, pad_mode='pad')
down = [downconv]
up = [uprelu, upconv, layers.Tanh()]
model = down + [submodule] + up
elif innermost:
upconv = layers.Conv2dTranspose(inner_nc, outer_nc,
kernel_size=4, stride=2,
padding=1, has_bias=use_bias, pad_mode='pad')
down = [downrelu, downconv]
up = [uprelu, upconv, upnorm]
model = down + up
else:
upconv = layers.Conv2dTranspose(inner_nc * 2, outer_nc,
kernel_size=4, stride=2,
padding=1, has_bias=use_bias, pad_mode='pad')
down = [downrelu, downconv, downnorm]
up = [uprelu, upconv, upnorm]
model = down + [submodule] + up
if dropout:
model.append(layers.Dropout(0.5))
self.model = layers.SequentialLayer(model)
self.skip_connections = not outermost
self.concat = Concat(axis=1)
def __init__(self, inp, oup, stride, expand_ratio):
super(InvertedResidual, self).__init__()
assert stride in [1, 2]
hidden_dim = int(round(inp * expand_ratio))
self.use_res_connect = stride == 1 and inp == oup
residual_layers = []
if expand_ratio != 1:
residual_layers.append(ConvBNReLU(inp, hidden_dim, kernel_size=1))
residual_layers.extend([
ConvBNReLU(hidden_dim,
hidden_dim,
stride=stride,
groups=hidden_dim),
layers.Conv2d(hidden_dim,
oup,
kernel_size=1,
stride=1,
has_bias=False),
layers.BatchNorm2d(oup),
])
self.conv = layers.SequentialLayer(residual_layers)
