def __init__(self, backbone, head='mlp', features_dim=128, L2Norm=True):
super(HypContrastiveModel, self).__init__()
self.backbone = backbone['backbone']
self.backbone_dim = backbone['dim']
self.head = head
self.L2Norm = L2Norm
if head == 'linear':
self.contrastive_head = nn.Linear(self.backbone_dim, features_dim)
elif head == 'mlp':
self.contrastive_head = nn.Sequential(
nn.Linear(self.backbone_dim, self.backbone_dim), nn.ReLU(),
nn.Linear(self.backbone_dim, features_dim))
else:
raise ValueError('Invalid head {}'.format(head))
import hyptorch.nn as hypnn
class atdict(dict):
__getattr__ = dict.__getitem__
__setattr__ = dict.__setitem__
__delattr__ = dict.__delitem__
hypargs = atdict()
hypargs.c = 1.0
hypargs.train_x = False
hypargs.train_c = False
self.tp = hypnn.ToPoincare(c=hypargs.c,
train_x=hypargs.train_x,
train_c=hypargs.train_c)
def __init__(self, embed_len, inst_num, c=0.05):
# for downloading pretrained model
super(MINet, self).__init__()
self.inst_num = inst_num
resnet18_pretn = models.resnet18(pretrained=True)
pretn_state_dict = resnet18_pretn.state_dict()
self.resnet18 = models.resnet18(num_classes=embed_len)
model_state_dict = self.resnet18.state_dict()
update_state = {
k: v
for k, v in pretn_state_dict.items()
if k not in ["fc.weight", "fc.bias"] and k in model_state_dict
}
model_state_dict.update(update_state)
self.resnet18.load_state_dict(model_state_dict)
self.c = c
self.tp = hypnn.ToPoincare(c=self.c,
train_x=True,
train_c=True,
ball_dim=embed_len)
self.att_weight = hypnn.HypLinear(embed_len, 1, c=self.c)
self.label_pred = hypnn.HyperbolicMLR(ball_dim=embed_len,
n_classes=2,
c=self.c)
def __init__(self,
block,
num_blocks,
in_channel=3,
zero_init_residual=False):
super(HypResNet, self).__init__()
self.in_planes = 64
self.conv1 = nn.Conv2d(in_channel,
64,
kernel_size=3,
stride=1,
padding=1,
bias=False)
self.bn1 = nn.BatchNorm2d(64)
self.maxpool = nn.MaxPool2d(kernel_size=2, stride=2, padding=1)
self.layer1 = self._make_layer(block, 64, num_blocks[0], stride=1)
self.layer2 = self._make_layer(block, 128, num_blocks[1], stride=2)
self.layer3 = self._make_layer(block, 256, num_blocks[2], stride=2)
self.layer4 = self._make_layer(block, 512, num_blocks[3], stride=2)
self.avgpool = nn.AvgPool2d(7, stride=1)
'''
HypTorch
'''
import hyptorch.nn as hypnn
class atdict(dict):
__getattr__ = dict.__getitem__
__setattr__ = dict.__setitem__
__delattr__ = dict.__delitem__
hypargs = atdict()
hypargs.c = 1.0
hypargs.train_x = False
hypargs.train_c = False
self.tp = hypnn.ToPoincare(c=hypargs.c,
train_x=hypargs.train_x,
train_c=hypargs.train_c)
for m in self.modules():
if isinstance(m, nn.Conv2d):
nn.init.kaiming_normal_(m.weight,
mode='fan_out',
nonlinearity='relu')
elif isinstance(m, (nn.BatchNorm2d, nn.GroupNorm)):
nn.init.constant_(m.weight, 1)
nn.init.constant_(m.bias, 0)
# Zero-initialize the last BN in each residual branch,
# so that the residual branch starts with zeros, and each residual block behaves
# like an identity. This improves the model by 0.2~0.3% according to:
# https://arxiv.org/abs/1706.02677
if zero_init_residual:
for m in self.modules():
if isinstance(m, Bottleneck):
nn.init.constant_(m.bn3.weight, 0)
elif isinstance(m, BasicBlock):
nn.init.constant_(m.bn2.weight, 0)
def __init__(self, args):
super(Netold, self).__init__()
self.conv1 = nn.Conv2d(3, 20, 5, 1)
self.conv2 = nn.Conv2d(20, 50, 5, 1)
self.fc1 = nn.Linear(4 * 4 * 50, 500)
self.fc2 = nn.Linear(500, args.dim)
self.tp = hypnn.ToPoincare(
c=args.c, train_x=args.train_x, train_c=args.train_c, ball_dim=args.dim
)
self.mlr = hypnn.HyperbolicMLR(ball_dim=args.dim, n_classes=120, c=args.c)
def __init__(self, args):
super(NetHypConv2, self).__init__()
self.tp = hypnn.ToPoincare(c=args.c,
train_x=args.train_x,
train_c=args.train_c,
ball_dim=args.dim)
self.conv1 = hypnn.HypConv2(1, 20, 5, c=args.c)
self.conv2 = hypnn.HypConv2(20, 50, 5, c=args.c)
self.fc1 = hypnn.HypLinear2(4 * 4 * 50, 500, c=args.c)
self.fc2 = hypnn.HypLinear2(500, args.dim, c=args.c)
self.mlr = hypnn.HyperbolicMLR(ball_dim=args.dim,
n_classes=10,
c=args.c)
def __init__(self, embed_len, inst_num, c=0.001):
# for downloading pretrained model
super(MINet, self).__init__()
self.inst_num = inst_num
self.lenet = LeNet(embed_len)
self.c = c
self.tp = hypnn.ToPoincare(c=self.c,
train_x=True,
train_c=False,
ball_dim=embed_len)
self.att_weight = hypnn.HypLinear(embed_len, 1, c=self.c)
self.msi_pred = hypnn.HyperbolicMLR(ball_dim=embed_len,
n_classes=2,
c=self.c)
def __init__(self, args):
super(NetHypConv, self).__init__()
self.tp = hypnn.ToPoincare(c=args.c,
train_x=args.train_x,
train_c=args.train_c,
ball_dim=args.dim)
self.conv1 = hypnn.HypConv(
1, 20, 5,
c=args.c) # input: 28 x 28, output: 20 x 24 x 24 (pool 2x2 after)
self.conv2 = hypnn.HypConv(
20, 50, 5, c=args.c
) # input: 20 x 12 x 12, output: 50 x 8 x 8 (pool 2x2 after)
self.fc1 = hypnn.HypLinear(4 * 4 * 50, 500,
c=args.c) # input: 50 x 4 x 4, output: 500
self.fc2 = hypnn.HypLinear(500, args.dim, c=args.c)
self.mlr = hypnn.HyperbolicMLR(ball_dim=args.dim,
n_classes=10,
c=args.c)
def __init__(self, c, x_dim=3, hid_dim=64, z_dim=64, args=None):
super().__init__()
self.c = c
print(f'encoder with some hyperbolic')
self.c1 = nn.Conv2d(x_dim, hid_dim, 3, padding=1)
# self.b1 = nn.BatchNorm2d(hid_dim)
# relu and maxpool(2) on forward pass
self.c2 = nn.Conv2d(hid_dim, hid_dim, 3, padding=1)
# self.b2 = nn.BatchNorm2d(hid_dim)
# relu and maxpool(2) on forward pass
self.c3 = nn.Conv2d(hid_dim, 10, 3, padding=1) # hid_dim
# self.b3 = nn.BatchNorm2d(hid_dim)
# relu and maxpool(2) on forward pass
self.c4 = hypnn.HypConv3(10, 10, 3, c, padding=1) # hid_dim, z_dim
# self.b4 = nn.BatchNorm2d(z_dim)
self.e2p = hypnn.ToPoincare(c=args.c,
train_c=args.train_c,
train_x=args.train_x)
def __init__(self, sample_size, num_seq=8, seq_len=5,
pred_step=3, network='resnet50', distance='dot',
poincare_c=1.0, poincare_ball_dim=256):
super(DPC_RNN, self).__init__()
# to reproduce the experiments
torch.cuda.manual_seed(233)
print('Using DPC-RNN model')
# number of dimensions in the image
self.sample_size = sample_size
self.num_seq = num_seq
self.seq_len = seq_len
self.distance = distance
# how many futures to predict
self.pred_step = pred_step
# 2 if seq_len is 5
if network == 'resnet8' or network == 'resnet10':
self.last_duration = int(math.ceil(seq_len / 2))
else:
self.last_duration = int(math.ceil(seq_len / 4))
# 4 if size of the image is 128
# change for toy experiment
#self.last_size = 1
self.last_size = int(math.ceil(sample_size / 32))
print('final feature map has size %dx%d' %
(self.last_size, self.last_size))
# f - choose an appropriate feature extractor. In this case, a resent
self.backbone, self.param = select_resnet(
network, track_running_stats=False, distance=self.distance)
#print (self.param)
self.param['num_layers'] = 1 # param for GRU
self.param['hidden_size'] = self.param['feature_size'] # param for GRU
self.agg = ConvGRU(input_size=self.param['feature_size'],
hidden_size=self.param['hidden_size'],
kernel_size=1,
num_layers=self.param['num_layers'])
# two layered network \phi
self.network_pred = nn.Sequential(
nn.Conv2d(self.param['feature_size'],
self.param['feature_size'], kernel_size=1, padding=0),
nn.ReLU(inplace=True),
nn.Conv2d(self.param['feature_size'],
self.param['feature_size'], kernel_size=1, padding=0)
)
# what does mask do ?
self.mask = None
self.relu = nn.ReLU(inplace=False)
self._initialize_weights(self.agg)
self._initialize_weights(self.network_pred)
# exponential map
self.tp = hypnn.ToPoincare(c=1.0, train_x=True, train_c=True, ball_dim=self.param['feature_size'])