def _sanity_check_model_conversion(self, svm_model, nn_model, x_val):
#use flatten layer to vectorize multi-dim array
flatten = Flatten()
flatten.to_numpy()
y_pred_svm = svm_model.decision_function(flatten.forward(x_val))
y_pred_nn = nn_model.forward(x_val)
rtol = 1e-7
if y_pred_nn.shape[1] == 2:
numpy.testing.assert_allclose(
y_pred_svm,
-y_pred_nn[:, 0],
rtol,
err_msg=
'Predictions of Trained SVM model and converted NN model are NOT equal! (2-Class-Case)'
)
numpy.testing.assert_allclose(
y_pred_svm,
y_pred_nn[:, 1],
rtol,
err_msg=
'Predictions of Trained SVM model and converted NN model are NOT equal! (2-Class-Case)'
)
else:
numpy.testing.assert_allclose(
y_pred_svm,
y_pred_nn,
rtol,
err_msg=
'Predictions of Trained SVM model and converted NN model are NOT equal!'
)
def __init__(self,
device,
image_channels=1,
h_dim=1024,
z_dim=32,
num_labels=0):
super(M2, self).__init__()
self.device = device
self.h_dim = h_dim
self.z_dim = z_dim
self.num_labels = num_labels
self.encoder = torch.nn.Sequential(
torch.nn.Conv2d(image_channels, 32, kernel_size=3, stride=2),
torch.nn.LeakyReLU(),
torch.nn.Conv2d(32, 64, kernel_size=3, stride=2),
torch.nn.LeakyReLU(), torch.nn.Dropout2d(p=.2),
torch.nn.Conv2d(64, 128, kernel_size=3, stride=1),
torch.nn.LeakyReLU(), torch.nn.Dropout2d(p=.2),
torch.nn.Conv2d(128, 256, kernel_size=3, stride=1),
torch.nn.LeakyReLU(), Flatten(), torch.nn.Linear(h_dim, h_dim),
torch.nn.LeakyReLU())
self.mu = torch.nn.Linear(h_dim + num_labels, z_dim) # mean
self.logsigma = torch.nn.Linear(h_dim + num_labels,
z_dim) # standard deviation
self.upscale_z = torch.nn.Linear(z_dim + num_labels, h_dim)
self.decoder = torch.nn.Sequential(
torch.nn.Linear(h_dim, h_dim), torch.nn.LeakyReLU(), UnFlatten(),
torch.nn.ConvTranspose2d(h_dim, 128, kernel_size=4, stride=2),
torch.nn.LeakyReLU(), torch.nn.Dropout2d(p=.2),
torch.nn.ConvTranspose2d(128, 64, kernel_size=5, stride=2),
torch.nn.LeakyReLU(), torch.nn.Dropout2d(p=.2),
torch.nn.ConvTranspose2d(64,
32,
kernel_size=4,
padding=0,
stride=2), torch.nn.LeakyReLU(),
torch.nn.ConvTranspose2d(32,
image_channels,
kernel_size=5,
stride=1), torch.nn.Sigmoid())
# simple FFNN classifier
# input: flattened vector, output: probability of each class
# TODO: implement CNN classifier
self.classifier = torch.nn.Sequential(
Flatten(),
torch.nn.Linear(784, 512),
torch.nn.ReLU(),
torch.nn.Linear(512, 256),
torch.nn.ReLU(),
torch.nn.Linear(256, self.num_labels), # 3 output layer
torch.nn.Softmax(dim=1))
def train_model(self, x_train, y_train, x_val, y_val, *args, **kwargs):
# train model using sklearn
print('training {} model'.format(self.__class__.__name__))
#use flatten layer to vectorize multi-dim array
flatten = Flatten()
flatten.to_numpy()
x_train = flatten.forward(x_train)
self.model.fit(x_train, y_train)
self.model = self._convert_to_nn(self.model, y_train, x_val)
def __init__(self, conditional=False, fc=False):
super(Discriminator, self).__init__()
self.conditional = conditional
ncond = 0
if self.conditional: # one hot encoded input for conditional model
ncond = 10
sn = th.nn.utils.spectral_norm
# sn = lambda x: x
self.fc = fc
mult = 2
if self.fc:
self.net = th.nn.Sequential(
Flatten(),
th.nn.Linear(28*28 + ncond, mult*256),
th.nn.LeakyReLU(0.2, inplace=True),
# th.nn.Linear(mult*256, mult*256, 4),
# th.nn.LeakyReLU(0.2, inplace=True),
# th.nn.Dropout(0.5),
th.nn.Linear(mult*256, mult*256, 4),
th.nn.LeakyReLU(0.2, inplace=True),
th.nn.Linear(mult*256*1*1, 1),
)
else:
self.net = th.nn.Sequential(
th.nn.Conv2d(1 + ncond, mult*64, 4, padding=0, stride=2),
th.nn.LeakyReLU(0.2, inplace=True),
# 16x16
sn(th.nn.Conv2d(mult*64, mult*128, 4, padding=0, stride=2)),
th.nn.LeakyReLU(0.2, inplace=True),
# 8x8
sn(th.nn.Conv2d(mult*128, mult*256, 4, padding=0, stride=2)),
th.nn.LeakyReLU(0.2, inplace=True),
# 4x4
Flatten(),
th.nn.Linear(mult*256*1*1, 1),
)
self._reset_weights()
def cifar_model_wide():
# cifar wide
model = nn.Sequential(nn.Conv2d(3, 16, 4, stride=2, padding=1), nn.ReLU(),
nn.Conv2d(16, 32, 4, stride=2, padding=1), nn.ReLU(),
Flatten(), nn.Linear(32 * 8 * 8, 100), nn.ReLU(),
nn.Linear(100, 10))
return model
def cifar_model():
# cifar base
model = nn.Sequential(nn.Conv2d(3, 8, 4, stride=2, padding=1), nn.ReLU(),
nn.Conv2d(8, 16, 4, stride=2, padding=1), nn.ReLU(),
Flatten(), nn.Linear(1024, 100), nn.ReLU(),
nn.Linear(100, 10))
return model
def __init__(self, f_in, h1, h2, f_out):
super(FC, self).__init__()
self.h1 = nn.Linear(f_in, h1)
self.h2 = nn.Linear(h1, h2)
self.output = nn.Linear(h2, f_out)
self.flat = Flatten()
def __init__(self,
device,
image_channels=1,
h_dim=1024,
z_dim=32,
num_labels=0):
super(VAE, self).__init__()
self.device = device
self.h_dim = h_dim
self.z_dim = z_dim
self.encoder = torch.nn.Sequential(
NNprint(),
torch.nn.Conv2d(image_channels, 32, kernel_size=3, stride=2),
NNprint(),
torch.nn.LeakyReLU(),
torch.nn.Conv2d(32, 64, kernel_size=3, stride=2),
NNprint(),
torch.nn.LeakyReLU(),
torch.nn.Conv2d(64, 128, kernel_size=3, stride=1),
NNprint(),
torch.nn.LeakyReLU(),
torch.nn.Conv2d(128, 256, kernel_size=3, stride=1),
NNprint(),
torch.nn.LeakyReLU(),
Flatten(),
NNprint(),
)
self.h_dim = h_dim
self.num_labels = num_labels
self.fc1 = torch.nn.Linear(h_dim, z_dim)
self.fc2 = torch.nn.Linear(h_dim, z_dim)
self.fc3 = torch.nn.Linear(z_dim + num_labels, h_dim)
self.decoder = torch.nn.Sequential(
NNprint(),
UnFlatten(),
NNprint(),
torch.nn.ConvTranspose2d(h_dim, 128, kernel_size=4, stride=2),
torch.nn.LeakyReLU(),
NNprint(),
torch.nn.ConvTranspose2d(128, 64, kernel_size=5, stride=2),
torch.nn.LeakyReLU(),
NNprint(),
torch.nn.ConvTranspose2d(64,
32,
kernel_size=4,
padding=0,
stride=2),
torch.nn.LeakyReLU(),
NNprint(),
torch.nn.ConvTranspose2d(32,
image_channels,
kernel_size=5,
stride=1),
torch.nn.Sigmoid(),
NNprint(),
)
def cifar_model_deep():
# cifar deep
model = nn.Sequential(nn.Conv2d(3, 8, 4, stride=2, padding=1), nn.ReLU(),
nn.Conv2d(8, 8, 3, stride=1, padding=1), nn.ReLU(),
nn.Conv2d(8, 8, 3, stride=1, padding=1), nn.ReLU(),
nn.Conv2d(8, 8, 4, stride=2, padding=1), nn.ReLU(),
Flatten(), nn.Linear(8 * 8 * 8, 100), nn.ReLU(),
nn.Linear(100, 10))
return model
def __init__(self, f_in, h1, h2, f_out):
super(FC, self).__init__()
self.h1 = nn.Linear(f_in, h1)
self.relu1 = nn.ReLU(inplace=True)
self.h2 = nn.Linear(h1, h2)
self.relu2 = nn.ReLU(inplace=True)
self.output = nn.Linear(h2, f_out)
self.flat = Flatten()
def __init__(self, f_in, h1, h2, f_out, d):
super(FC_RP, self).__init__()
self.basis_weights = nn.Parameter(torch.zeros(d, 1))
self.h1 = LinearRP(f_in, h1, d)
self.h2 = LinearRP(h1, h2, d)
self.output = LinearRP(h2, f_out, d)
self.flat = Flatten()
def mnist_cnn_4layer():
# mnist_cnn_a
return nn.Sequential(
nn.Conv2d(1, 16, (4, 4), stride=2, padding=1),
nn.ReLU(),
nn.Conv2d(16, 32, (4, 4), stride=2, padding=1),
nn.ReLU(),
Flatten(),
nn.Linear(1568, 100),
nn.ReLU(),
nn.Linear(100, 10),
)
def cnn_4layer_b():
# cifar_cnn_b
return nn.Sequential(
nn.ZeroPad2d((1, 2, 1, 2)),
nn.Conv2d(3, 32, (5, 5), stride=2, padding=0),
nn.ReLU(),
nn.Conv2d(32, 128, (4, 4), stride=2, padding=1),
nn.ReLU(),
Flatten(),
nn.Linear(8192, 250),
nn.ReLU(),
nn.Linear(250, 10),
)
def __init__(self, device, image_channels=1, h_dim=1024, z_dim=32):
super(M1, self).__init__()
self.device = device
self.h_dim = h_dim
self.z_dim = z_dim
self.encoder = torch.nn.Sequential(
torch.nn.Conv2d(image_channels, 32, kernel_size=3, stride=2),
torch.nn.LeakyReLU(),
torch.nn.Conv2d(32, 64, kernel_size=3, stride=2),
torch.nn.LeakyReLU(),
torch.nn.Dropout2d(p=.2),
torch.nn.Conv2d(64, 128, kernel_size=3, stride=1),
torch.nn.LeakyReLU(),
torch.nn.Dropout2d(p=.2),
torch.nn.Conv2d(128, 256, kernel_size=3, stride=1),
torch.nn.LeakyReLU(),
Flatten(),
torch.nn.Linear(h_dim, h_dim),
torch.nn.LeakyReLU(),
)
self.mu = torch.nn.Linear(h_dim, z_dim) # mean
self.logsigma = torch.nn.Linear(h_dim, z_dim) # standard deviation
self.upscale_z = torch.nn.Linear(z_dim, h_dim)
self.decoder = torch.nn.Sequential(
torch.nn.Linear(h_dim, h_dim), torch.nn.LeakyReLU(), UnFlatten(),
torch.nn.ConvTranspose2d(h_dim, 128, kernel_size=4, stride=2),
torch.nn.LeakyReLU(), torch.nn.Dropout2d(p=.2),
torch.nn.ConvTranspose2d(128, 64, kernel_size=5, stride=2),
torch.nn.LeakyReLU(), torch.nn.Dropout2d(p=.2),
torch.nn.ConvTranspose2d(64,
32,
kernel_size=4,
padding=0,
stride=2), torch.nn.LeakyReLU(),
torch.nn.ConvTranspose2d(32,
image_channels,
kernel_size=5,
stride=1), torch.nn.Sigmoid())
def _convert_to_nn(self, svm_model, y_train, x_val):
#convert to linear NN
print('converting {} model to linear NN'.format(
self.__class__.__name__))
W = svm_model.coef_.T
B = svm_model.intercept_
if numpy.unique(y_train).size == 2:
linear_layer = Linear(W.shape[0], 2)
linear_layer.W = numpy.concatenate([-W, W], axis=1)
linear_layer.B = numpy.concatenate([-B, B], axis=0)
else:
linear_layer = Linear(*(W.shape))
linear_layer.W = W
linear_layer.B = B
svm_model = self.model
nn_model = Sequential([Flatten(), linear_layer])
if not self.use_gpu: nn_model.to_numpy()
#sanity check model conversion
self._sanity_check_model_conversion(svm_model, nn_model, x_val)
print('model conversion sanity check passed')
return nn_model
def _read_txt_helper(path):
with open(path, 'rb') as f:
content = f.read().split('\n')
modules = []
c = 0
line = content[c]
while len(line) > 0:
if line.startswith(
Linear.__name__
): # @UndefinedVariable import error suppression for PyDev users
'''
Format of linear layer
Linear <rows_of_W> <columns_of_W>
<flattened weight matrix W>
<flattened bias vector>
'''
_, m, n = line.split()
m = int(m)
n = int(n)
layer = Linear(m, n)
layer.W = np.array([
float(weightstring)
for weightstring in content[c + 1].split()
if len(weightstring) > 0
]).reshape((m, n))
layer.B = np.array([
float(weightstring)
for weightstring in content[c + 2].split()
if len(weightstring) > 0
])
modules.append(layer)
c += 3 # the description of a linear layer spans three lines
elif line.startswith(
Convolution.__name__
): # @UndefinedVariable import error suppression for PyDev users
'''
Format of convolution layer
Convolution <rows_of_W> <columns_of_W> <depth_of_W> <number_of_filters_W> <stride_axis_0> <stride_axis_1>
<flattened filter block W>
<flattened bias vector>
'''
_, h, w, d, n, s0, s1 = line.split()
h = int(h)
w = int(w)
d = int(d)
n = int(n)
s0 = int(s0)
s1 = int(s1)
layer = Convolution(filtersize=(h, w, d, n),
stride=(s0, s1))
layer.W = np.array([
float(weightstring)
for weightstring in content[c + 1].split()
if len(weightstring) > 0
]).reshape((h, w, d, n))
layer.B = np.array([
float(weightstring)
for weightstring in content[c + 2].split()
if len(weightstring) > 0
])
modules.append(layer)
c += 3 #the description of a convolution layer spans three lines
elif line.startswith(
SumPool.__name__
): # @UndefinedVariable import error suppression for PyDev users
'''
Format of sum pooling layer
SumPool <mask_heigth> <mask_width> <stride_axis_0> <stride_axis_1>
'''
_, h, w, s0, s1 = line.split()
h = int(h)
w = int(w)
s0 = int(s0)
s1 = int(s1)
layer = SumPool(pool=(h, w), stride=(s0, s1))
modules.append(layer)
c += 1 # one line of parameterized layer description
elif line.startswith(
MaxPool.__name__
): # @UndefinedVariable import error suppression for PyDev users
'''
Format of max pooling layer
MaxPool <mask_heigth> <mask_width> <stride_axis_0> <stride_axis_1>
'''
_, h, w, s0, s1 = line.split()
h = int(h)
w = int(w)
s0 = int(s0)
s1 = int(s1)
layer = MaxPool(pool=(h, w), stride=(s0, s1))
modules.append(layer)
c += 1 # one line of parameterized layer description
elif line.startswith(
Flatten.__name__
): # @UndefinedVariable import error suppression for PyDev users
modules.append(Flatten())
c += 1 #one line of parameterless layer description
elif line.startswith(
Rect.__name__
): # @UndefinedVariable import error suppression for PyDev users
modules.append(Rect())
c += 1 #one line of parameterless layer description
elif line.startswith(
Tanh.__name__
): # @UndefinedVariable import error suppression for PyDev users
modules.append(Tanh())
c += 1 #one line of parameterless layer description
elif line.startswith(
SoftMax.__name__
): # @UndefinedVariable import error suppression for PyDev users
modules.append(SoftMax())
c += 1 #one line of parameterless layer description
else:
raise ValueError(
'Layer type identifier' +
[s for s in line.split() if len(s) > 0][0] +
' not supported for reading from plain text file')
#skip info of previous layers, read in next layer header
line = content[c]
return Sequential(modules)
def __init__(self, imsize=28, paths=4, segments=5, samples=2, zdim=128,
conditional=False, variational=True, raster=False, fc=False):
super(VectorMNISTVAE, self).__init__()
# if imsize != 28:
# raise NotImplementedError()
self.samples = samples
self.imsize = imsize
self.paths = paths
self.segments = segments
self.zdim = zdim
self.conditional = conditional
self.variational = variational
ncond = 0
if self.conditional: # one hot encoded input for conditional model
ncond = 10
self.fc = fc
mult = 1
nc = 1024
if not self.fc: # conv model
self.encoder = th.nn.Sequential(
# 32x32
th.nn.Conv2d(1 + ncond, mult*64, 4, padding=0, stride=2),
th.nn.LeakyReLU(0.2, inplace=True),
# 16x16
th.nn.Conv2d(mult*64, mult*128, 4, padding=0, stride=2),
th.nn.LeakyReLU(0.2, inplace=True),
# 8x8
th.nn.Conv2d(mult*128, mult*256, 4, padding=0, stride=2),
th.nn.LeakyReLU(0.2, inplace=True),
Flatten(),
)
else:
self.encoder = th.nn.Sequential(
# 32x32
Flatten(),
th.nn.Linear(28*28 + ncond, mult*256),
th.nn.LeakyReLU(0.2, inplace=True),
# 8x8
th.nn.Linear(mult*256, mult*256, 4),
th.nn.LeakyReLU(0.2, inplace=True),
)
self.mu_predictor = th.nn.Linear(256*1*1, zdim)
if self.variational:
self.logvar_predictor = th.nn.Linear(256*1*1, zdim)
self.decoder = th.nn.Sequential(
th.nn.Linear(zdim + ncond, nc),
th.nn.SELU(inplace=True),
th.nn.Linear(nc, nc),
th.nn.SELU(inplace=True),
)
self.raster = raster
if self.raster:
self.raster_decoder = th.nn.Sequential(
th.nn.Linear(nc, imsize*imsize),
)
else:
# 4 points bezier with n_segments -> 3*n_segments + 1 points
self.point_predictor = th.nn.Sequential(
th.nn.Linear(nc, 2*self.paths*(self.segments*3+1)),
th.nn.Tanh() # bound spatial extent
)
self.width_predictor = th.nn.Sequential(
th.nn.Linear(nc, self.paths),
th.nn.Tanh()
)
self.alpha_predictor = th.nn.Sequential(
th.nn.Linear(nc, self.paths),
th.nn.Tanh()
)
self._reset_weights()
def __init__(self):
super(StyleCNN, self).__init__()
# Initial configurations
self.content_layers = ['conv_4']
self.style_layers = ['conv_1', 'conv_2', 'conv_3', 'conv_4', 'conv_5']
self.content_weight = 5
self.style_weight = 1000
self.gram = GramMatrix()
self.use_cuda = torch.cuda.is_available()
final_linear = nn.Linear(256, 32)
torch.randn(final_linear.weight.size(),
out=final_linear.weight.data).mul_(0.01)
final_linear.bias.data.mul_(0.01)
final_linear.bias.data[:16].add_(1)
self.normalization_network = nn.Sequential(
nn.Conv2d(3, 32, 9, stride=2, padding=0),
nn.Conv2d(32, 64, 9, stride=2, padding=0),
nn.Conv2d(64, 128, 9, stride=2, padding=0), Flatten(),
nn.Linear(625, 256), final_linear)
self.transform_network = nn.Sequential(
nn.ReflectionPad2d(40),
nn.Conv2d(3, 32, 9, stride=1, padding=4),
nn.Conv2d(32, 64, 3, stride=2, padding=1),
nn.Conv2d(64, 128, 3, stride=2, padding=1),
nn.Conv2d(128, 128, 3, stride=1, padding=0),
nn.Conv2d(128, 128, 3, stride=1, padding=0),
nn.Conv2d(128, 128, 3, stride=1, padding=0),
nn.Conv2d(128, 128, 3, stride=1, padding=0),
nn.Conv2d(128, 128, 3, stride=1, padding=0),
nn.Conv2d(128, 128, 3, stride=1, padding=0),
nn.Conv2d(128, 128, 3, stride=1, padding=0),
nn.Conv2d(128, 128, 3, stride=1, padding=0),
nn.Conv2d(128, 128, 3, stride=1, padding=0),
nn.Conv2d(128, 128, 3, stride=1, padding=0),
nn.ConvTranspose2d(128,
64,
3,
stride=2,
padding=1,
output_padding=1),
nn.ConvTranspose2d(64,
32,
3,
stride=2,
padding=1,
output_padding=1),
nn.Conv2d(32, 3, 9, stride=1, padding=4),
)
try:
self.transform_network.load_state_dict(
torch.load("models/transform_net_ckpt"))
self.normalization_network.load_state_dict(
torch.load("models/normalization_net_ckpt"))
except (IOError):
pass
self.out_dims = [
32, 64, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 64,
32, 3
]
self.loss_network = models.vgg19(pretrained=True)
self.loss_layers = []
idx, layer_i = 0, 1
for layer in list(self.loss_network.features):
losses = ""
if isinstance(layer, nn.Conv2d):
name = "conv_" + str(layer_i)
if name in self.content_layers:
losses += "c"
if name in self.style_layers:
losses += "s"
if losses != "":
self.loss_layers.append((idx, losses))
if isinstance(layer, nn.ReLU):
layer_i += 1
idx += 1
self.loss = nn.MSELoss()
norm_params = torch.FloatTensor(128, 32)
torch.randn(128, 16, out=norm_params[:, :16]).mul_(0.01).add_(1)
torch.randn(128, 16, out=norm_params[:, 16:]).mul_(0.01)
self.norm_params = Parameter(norm_params)
self.normalization_optimizer = optim.Adam(
self.normalization_network.parameters(), lr=1e-3)
self.transform_optimizer = optim.Adam(
self.transform_network.parameters(), lr=1e-3)
if self.use_cuda:
self.normalization_network.cuda()
self.loss.cuda()
self.gram.cuda()
def __init__(self, **kwargs):
super(PoseNet, self).__init__("PoseNet", **kwargs)
if kwargs["only_front_camera"]:
in_channels = 3
else:
in_channels = 18
# Stem network
self.stem_network = nn.Sequential(
nn.Conv2d(in_channels=in_channels,
out_channels=64,
kernel_size=7,
stride=2),
nn.MaxPool2d(kernel_size=3, stride=2),
nn.ReLU(True),
#
nn.Conv2d(in_channels=64,
out_channels=192,
kernel_size=3,
stride=1),
nn.MaxPool2d(kernel_size=3, stride=2),
nn.ReLU(True),
)
# Side networks
self.side_network_4a = nn.Sequential(
nn.AvgPool2d(kernel_size=5, stride=3),
nn.Conv2d(in_channels=512,
out_channels=128,
kernel_size=1,
stride=1),
nn.ReLU(True),
Flatten(),
nn.Linear(3 * 3 * 128, 1024), # paper says 4 x 4 ?
nn.ReLU(True),
nn.Dropout(p=0.7),
nn.Linear(1024, 4))
self.side_network_4d = nn.Sequential(
nn.AvgPool2d(kernel_size=5, stride=3),
nn.Conv2d(in_channels=528,
out_channels=128,
kernel_size=1,
stride=1),
nn.ReLU(True),
Flatten(),
nn.Linear(3 * 3 * 128, 1024), # paper says 4 x 4 ?
nn.ReLU(True),
nn.Dropout(p=0.7),
nn.Linear(1024, 4))
# Inceptions 3
self.incep_3a = Inception(
in_channels=192,
conv1x1_out_channels=64,
conv3x3_in_channels=96,
conv3x3_out_channels=128,
conv5x5_in_channels=16,
conv5x5_out_channels=32,
maxpool3x3_out_channels=32,
)
self.incep_3b = Inception(
in_channels=256,
conv1x1_out_channels=128,
conv3x3_in_channels=128,
conv3x3_out_channels=192,
conv5x5_in_channels=32,
conv5x5_out_channels=96,
maxpool3x3_out_channels=64,
)
# Inceptions 4
self.incep_4a = Inception(in_channels=480,
conv1x1_out_channels=192,
conv3x3_in_channels=96,
conv3x3_out_channels=208,
conv5x5_in_channels=16,
conv5x5_out_channels=48,
maxpool3x3_out_channels=64)
self.incep_4b = Inception(in_channels=512,
conv1x1_out_channels=160,
conv3x3_in_channels=112,
conv3x3_out_channels=224,
conv5x5_in_channels=24,
conv5x5_out_channels=64,
maxpool3x3_out_channels=64)
self.incep_4c = Inception(in_channels=512,
conv1x1_out_channels=128,
conv3x3_in_channels=128,
conv3x3_out_channels=256,
conv5x5_in_channels=24,
conv5x5_out_channels=64,
maxpool3x3_out_channels=64)
self.incep_4d = Inception(in_channels=512,
conv1x1_out_channels=112,
conv3x3_in_channels=144,
conv3x3_out_channels=288,
conv5x5_in_channels=32,
conv5x5_out_channels=64,
maxpool3x3_out_channels=64)
self.incep_4e = Inception(in_channels=528,
conv1x1_out_channels=256,
conv3x3_in_channels=160,
conv3x3_out_channels=320,
conv5x5_in_channels=32,
conv5x5_out_channels=128,
maxpool3x3_out_channels=128)
# Inceptions 5
self.incep_5a = Inception(in_channels=832,
conv1x1_out_channels=256,
conv3x3_in_channels=160,
conv3x3_out_channels=320,
conv5x5_in_channels=32,
conv5x5_out_channels=128,
maxpool3x3_out_channels=128)
self.incep_5b = Inception(in_channels=832,
conv1x1_out_channels=384,
conv3x3_in_channels=192,
conv3x3_out_channels=384,
conv5x5_in_channels=48,
conv5x5_out_channels=128,
maxpool3x3_out_channels=128)
self.flatten = Flatten()
self.dropout = nn.Dropout(p=0.4)
self.maxpool = nn.MaxPool2d(kernel_size=3, stride=2, padding=1)
self.avgpool = nn.AvgPool2d(kernel_size=7, stride=1)
self.final_regressor = nn.Sequential(nn.Linear(1024, 2048),
nn.ReLU(True), nn.Linear(2048, 4))
self.apply(xavier_initialization)
def __init__(self, **kwargs):
super(PoseNetSimple, self).__init__("PoseNetSimple", **kwargs)
if kwargs["only_front_camera"]:
in_channels = 3
else:
in_channels = 18
# Stem network
self.stem_network = nn.Sequential(
nn.Conv2d(in_channels=in_channels,
out_channels=64,
kernel_size=7,
stride=2),
nn.MaxPool2d(kernel_size=3, stride=2),
nn.LeakyReLU(inplace=True),
#
nn.Conv2d(in_channels=64,
out_channels=192,
kernel_size=3,
stride=1),
nn.MaxPool2d(kernel_size=3, stride=2),
nn.LeakyReLU(inplace=True),
)
# Inceptions 3
self.incep_3a = Inception(
in_channels=192,
conv1x1_out_channels=64,
conv3x3_in_channels=96,
conv3x3_out_channels=128,
conv5x5_in_channels=16,
conv5x5_out_channels=32,
maxpool3x3_out_channels=32,
)
self.incep_3b = Inception(
in_channels=256,
conv1x1_out_channels=128,
conv3x3_in_channels=128,
conv3x3_out_channels=192,
conv5x5_in_channels=32,
conv5x5_out_channels=96,
maxpool3x3_out_channels=64,
)
# Inceptions 4
self.incep_4a = Inception(in_channels=480,
conv1x1_out_channels=192,
conv3x3_in_channels=96,
conv3x3_out_channels=208,
conv5x5_in_channels=16,
conv5x5_out_channels=48,
maxpool3x3_out_channels=64)
# Side networks
self.side_network_4a = nn.Sequential(
nn.AvgPool2d(kernel_size=5, stride=3),
nn.Conv2d(in_channels=512,
out_channels=128,
kernel_size=1,
stride=1),
nn.LeakyReLU(inplace=True),
Flatten(),
nn.Linear(3 * 3 * 128, 1024), # paper says 4 x 4 ?
nn.LeakyReLU(inplace=True),
nn.Dropout(p=0.5),
nn.Linear(1024, 4))
self.maxpool = nn.MaxPool2d(kernel_size=3, stride=2, padding=1)
self.apply(xavier_initialization)