-
Notifications
You must be signed in to change notification settings - Fork 5
/
Models_Norm.py
428 lines (339 loc) · 15.1 KB
/
Models_Norm.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
import torch
import torch.nn as nn
import torch.nn.functional as F
from utils.trans_norm import TransNorm2d
from torch.autograd import Function
K = 20
def knn(x, k):
inner = -2 * torch.matmul(x.transpose(2, 1), x)
xx = torch.sum(x ** 2, dim=1, keepdim=True)
pairwise_distance = -xx - inner - xx.transpose(2, 1)
# (batch_size, num_points, k)
idx = pairwise_distance.topk(k=k, dim=-1)[1]
return idx
def get_graph_feature(x, args, k=20, idx=None):
batch_size = x.size(0)
num_points = x.size(2)
x = x.view(batch_size, -1, num_points)
if idx is None:
idx = knn(x, k=k) # (batch_size, num_points, k)
# Run on cpu or gpu
device = torch.device("cuda:" + str(x.get_device()) if args.cuda else "cpu")
idx_base = torch.arange(0, batch_size, device=device).view(-1, 1, 1) * num_points
idx = idx + idx_base
idx = idx.view(-1)
_, num_dims, _ = x.size()
x = x.transpose(2, 1).contiguous() # (batch_size, num_points, num_dims) -> (batch_size*num_points, num_dims)
feature = x.view(batch_size * num_points, -1)[idx, :] # matrix [k*num_points*batch_size,3]
feature = feature.view(batch_size, num_points, k, num_dims)
x = x.view(batch_size, num_points, 1, num_dims).repeat(1, 1, k, 1)
feature = torch.cat((feature - x, x), dim=3).permute(0, 3, 1, 2)
return feature
def l2_norm(input, axit=1):
norm = torch.norm(input, 2, axit, True)
output = torch.div(input, norm)
return output
class conv_2d(nn.Module):
def __init__(self, in_ch, out_ch, kernel, activation='relu', bias=True):
super(conv_2d, self).__init__()
if activation == 'relu':
self.conv = nn.Sequential(
nn.Conv2d(in_ch, out_ch, kernel_size=kernel, bias=bias),
# nn.BatchNorm2d(out_ch),
# nn.InstanceNorm2d(out_ch),
# TransNorm2d(out_ch),
nn.LayerNorm([out_ch, 1024, 20]),
nn.ReLU(inplace=True)
)
elif activation == 'leakyrelu':
self.conv = nn.Sequential(
nn.Conv2d(in_ch, out_ch, kernel_size=kernel, bias=bias),
# nn.BatchNorm2d(out_ch),
# nn.InstanceNorm2d(out_ch),
# TransNorm2d(out_ch),
nn.LayerNorm([out_ch, 1024, 20]),
nn.LeakyReLU(negative_slope=0.2, inplace=True)
)
def forward(self, x):
x = self.conv(x)
return x
class fc_layer(nn.Module):
def __init__(self, in_ch, out_ch, bn=False, activation='relu', bias=True):
super(fc_layer, self).__init__()
if activation == 'relu':
self.ac = nn.ReLU(inplace=True)
elif activation == 'leakyrelu':
self.ac = nn.LeakyReLU(negative_slope=0.2, inplace=True)
if bn:
self.fc = nn.Sequential(
nn.Linear(in_ch, out_ch, bias=bias),
# nn.BatchNorm1d(out_ch),
nn.LayerNorm(out_ch),
self.ac
)
else:
self.fc = nn.Sequential(
nn.Linear(in_ch, out_ch, bias=bias),
self.ac
)
def forward(self, x):
x = l2_norm(x, 1)
x = self.fc(x)
return x
class transform_net(nn.Module):
""" Input (XYZ) Transform Net, input is BxNx3 gray image
Return: Transformation matrix of size 3xK """
def __init__(self, args, in_ch, out=3):
super(transform_net, self).__init__()
self.K = out
self.args = args
activation = 'leakyrelu' if args.model == 'dgcnn' else 'relu'
bias = False if args.model == 'dgcnn' else True
self.conv2d1 = conv_2d(in_ch, 64, kernel=1, activation=activation, bias=bias)
self.conv2d2 = conv_2d(64, 128, kernel=1, activation=activation, bias=bias)
self.conv2d3 = conv_2d(128, 1024, kernel=1, activation=activation, bias=bias)
self.fc1 = fc_layer(1024, 512, activation=activation, bias=bias, bn=True)
self.fc2 = fc_layer(512, 256, activation=activation, bn=True)
self.fc3 = nn.Linear(256, out * out)
def forward(self, x):
device = torch.device("cuda:" + str(x.get_device()) if self.args.cuda else "cpu")
x = self.conv2d1(x)
x = self.conv2d2(x)
if self.args.model == "dgcnn":
x = x.max(dim=-1, keepdim=False)[0]
x = torch.unsqueeze(x, dim=3)
x = self.conv2d3(x)
x, _ = torch.max(x, dim=2, keepdim=False)
x = x.view(x.size(0), -1)
x = self.fc1(x)
x = self.fc2(x)
x = self.fc3(x)
iden = torch.eye(self.K).view(1, self.K * self.K).repeat(x.size(0), 1)
iden = iden.to(device)
x = x + iden
x = x.view(x.size(0), self.K, self.K)
return x
class PointNet(nn.Module):
def __init__(self, args, num_class=10):
super(PointNet, self).__init__()
self.args = args
self.trans_net1 = transform_net(args, 3, 3)
self.trans_net2 = transform_net(args, 64, 64)
self.conv1 = conv_2d(3, 64, 1)
self.conv2 = conv_2d(64, 64, 1)
self.conv3 = conv_2d(64, 64, 1)
self.conv4 = conv_2d(64, 128, 1)
self.conv5 = conv_2d(128, 1024, 1)
num_f_prev = 64 + 64 + 64 + 128
self.cls_C = class_classifier(args, 1024, 10)
self.domain_C = domain_classifier(args, 1024, 2)
self.rotcls_C1 = linear_classifier(1024, 4)
self.rotcls_C2 = linear_classifier(1024, 4)
self.defcls_C = ssl_classifier(args, 1024, 27)
self.DecoderFC = DecoderFC(args, 1024)
self.DefRec = RegionReconstruction(args, num_f_prev + 1024)
self.normreg_C = nn.Conv1d(1024, 4, kernel_size=1, bias=False)
def forward(self, x, alpha=0, activate_DefRec=False):
num_points = x.size(2)
x = torch.unsqueeze(x, dim=3)
cls_logits = {}
transform = self.trans_net1(x)
x = x.transpose(2, 1)
x = x.squeeze(dim=3)
x = torch.bmm(x, transform)
x = x.unsqueeze(3)
x = x.transpose(2, 1)
x1 = self.conv1(x)
x2 = self.conv2(x1)
transform = self.trans_net2(x2)
x = x2.transpose(2, 1)
x = x.squeeze(dim=3)
x = torch.bmm(x, transform)
x = x.unsqueeze(3)
x = x.transpose(2, 1)
x3 = self.conv3(x)
x4 = self.conv4(x3)
x_cat = torch.cat((x1, x2, x3, x4), dim=1)
x5 = self.conv5(x4)
x5_pool, _ = torch.max(x5, dim=2, keepdim=False)
x = x5_pool.squeeze(dim=2) # batchsize*1024
cls_logits["cls"] = self.cls_C(x)
if alpha is not 0:
reverse_x = ReverseLayerF.apply(x, alpha)
cls_logits["domain_cls"] = self.domain_C(reverse_x)
cls_logits["rot_cls1"] = self.rotcls_C1(x)
cls_logits["rot_cls2"] = self.rotcls_C2(x)
cls_logits["def_cls"] = self.defcls_C(x)
# cls_logits["curv_conf"] = self.curvconfreg_C(x)
# cls_logits["norm_reg"] = self.normreg_C(x5).permute(0, 2, 1)
cls_logits["decoder"] = self.DecoderFC(x)
if activate_DefRec:
DefRec_input = torch.cat((x_cat.squeeze(dim=3), x5_pool.repeat(1, 1, num_points)), dim=1)
cls_logits["DefRec"] = self.DefRec(DefRec_input)
return cls_logits
class DGCNN(nn.Module):
def __init__(self, args):
super(DGCNN, self).__init__()
self.args = args
self.k = K
self.input_transform_net = transform_net(args, 6, 3)
self.conv1 = conv_2d(6, 64, kernel=1, bias=False, activation='leakyrelu')
self.conv2 = conv_2d(64 * 2, 64, kernel=1, bias=False, activation='leakyrelu')
self.conv3 = conv_2d(64 * 2, 128, kernel=1, bias=False, activation='leakyrelu')
self.conv4 = conv_2d(128 * 2, 256, kernel=1, bias=False, activation='leakyrelu')
num_f_prev = 64 + 64 + 128 + 256
self.bn5 = nn.BatchNorm1d(512)
self.conv5 = nn.Conv1d(num_f_prev, 512, kernel_size=1, bias=False)
self.cls_C = class_classifier(args, 1024, 10)
self.domain_C = domain_classifier(args, 1024, 2)
self.rotcls_C1 = linear_classifier(1024, 4)
self.rotcls_C2 = linear_classifier(1024, 4)
self.defcls_C = linear_classifier(1024, 27)
# self.normreg_C = nn.Conv1d(1024, 4, kernel_size=1, bias=False)
# self.curvconfreg_C = linear_classifier(1)
self.DecoderFC = DecoderFC(args, 1024)
self.DefRec = RegionReconstruction(args, num_f_prev + 1024)
def forward(self, x, alpha=0, activate_DefRec=False):
batch_size = x.size(0)
num_points = x.size(2)
cls_logits = {}
# returns a tensor of (batch_size, 6, #points, #neighboors)
# interpretation: each point is represented by 20 NN, each of size 6
# x0 = get_graph_feature(x, self.args, k=self.k) # x0: [b, 6, 1024, 20]
# align to a canonical space (e.g., apply rotation such that all inputs will have the same rotation)
# transformd_x0 = self.input_transform_net(x0) # transformd_x0: [3, 3]
# x = torch.matmul(transformd_x0, x)
# returns a tensor of (batch_size, 6, #points, #neighboors)
# interpretation: each point is represented by 20 NN, each of size 6
x = get_graph_feature(x, self.args, k=self.k) # x: [b, 6, 1024, 20]
# process point and inflate it from 6 to e.g., 64
x = self.conv1(x) # x: [b, 64, 1024, 20]
# per each feature (from e.g., 64) take the max value from the representative vectors
# Conceptually this means taking the neighbor that gives the highest feature value.
# returns a tensor of size e.g., (batch_size, 64, #points)
x1 = x.max(dim=-1, keepdim=False)[0]
x = get_graph_feature(x1, self.args, k=self.k)
x = self.conv2(x)
x2 = x.max(dim=-1, keepdim=False)[0]
x = get_graph_feature(x2, self.args, k=self.k)
x = self.conv3(x)
x3 = x.max(dim=-1, keepdim=False)[0]
x = get_graph_feature(x3, self.args, k=self.k)
x = self.conv4(x)
x4 = x.max(dim=-1, keepdim=False)[0]
x_cat = torch.cat((x1, x2, x3, x4), dim=1)
x5 = self.conv5(x_cat) # [b, 1024, 1024]
x5 = F.leaky_relu(self.bn5(x5), negative_slope=0.2)
x1 = F.adaptive_max_pool1d(x5, 1).view(batch_size, -1)
x2 = F.adaptive_avg_pool1d(x5, 1).view(batch_size, -1)
x = torch.cat((x1, x2), 1)
# x5 = F.leaky_relu(self.bn5(x), negative_slope=0.2)
# Per feature take the point that have the highest (absolute) value.
# Generate a feature vector for the whole shape
# x5_pool = F.adaptive_max_pool1d(x5, 1).view(batch_size, -1)
# x = x5_pool
cls_logits["cls"] = self.cls_C(x)
if alpha is not 0:
reverse_x = ReverseLayerF.apply(x, alpha)
cls_logits["domain_cls"] = self.domain_C(reverse_x)
cls_logits["rot_cls1"] = self.rotcls_C1(x)
cls_logits["rot_cls2"] = self.rotcls_C2(x)
cls_logits["def_cls"] = self.defcls_C(x)
# cls_logits["curv_conf"] = self.curvconfreg_C(x)
# cls_logits["norm_reg"] = self.normreg_C(x5).permute(0, 2, 1)
cls_logits["decoder"] = self.DecoderFC(x)
if activate_DefRec:
DefRec_input = torch.cat((x_cat, x.unsqueeze(2).repeat(1, 1, num_points)), dim=1)
cls_logits["DefRec"] = self.DefRec(DefRec_input)
return cls_logits
class class_classifier(nn.Module):
def __init__(self, args, input_dim, num_class=10):
super(class_classifier, self).__init__()
activate = 'leakyrelu' if args.model == 'dgcnn' else 'relu'
bias = True if args.model == 'dgcnn' else False
self.mlp1 = fc_layer(input_dim, 512, bias=bias, activation=activate, bn=True)
self.dp1 = nn.Dropout(p=args.dropout)
self.mlp2 = fc_layer(512, 256, bias=True, activation=activate, bn=True)
self.dp2 = nn.Dropout(p=args.dropout)
self.mlp3 = nn.Linear(256, num_class)
def forward(self, x):
x = self.dp1(self.mlp1(x))
x2 = self.dp2(self.mlp2(x))
logits = self.mlp3(x2)
return logits
class ssl_classifier(nn.Module):
def __init__(self, args, input_dim, num_class):
super(ssl_classifier, self).__init__()
self.mlp1 = fc_layer(input_dim, 256)
self.dp1 = nn.Dropout(p=args.dropout)
self.mlp2 = nn.Linear(256, num_class)
def forward(self, x):
x = self.dp1(self.mlp1(x))
logits = self.mlp2(x)
return logits
class linear_classifier(nn.Module):
def __init__(self, input_dim, num_class):
super(linear_classifier, self).__init__()
self.mlp1 = nn.Linear(input_dim, num_class)
def forward(self, x):
logits = self.mlp1(x)
return logits
class domain_classifier(nn.Module):
def __init__(self, args, input_dim, num_class=2):
super(domain_classifier, self).__init__()
activate = 'leakyrelu' if args.model == 'dgcnn' else 'relu'
bias = True if args.model == 'dgcnn' else False
self.mlp1 = fc_layer(input_dim, 512, bias=bias, activation=activate, bn=True)
self.mlp2 = fc_layer(512, 256, bias=True, activation=activate, bn=True)
self.mlp3 = nn.Linear(256, num_class)
def forward(self, x):
x = self.mlp1(x)
x2 = self.mlp2(x)
logits = self.mlp3(x2)
return logits
class DecoderFC(nn.Module):
def __init__(self, args, input_dim):
super(DecoderFC, self).__init__()
activate = 'leakyrelu' if args.model == 'dgcnn' else 'relu'
bias = True if args.model == 'dgcnn' else False
self.mlp1 = fc_layer(input_dim, 512, bias=bias, activation=activate, bn=True)
self.mlp2 = fc_layer(512, 512, bias=True, activation=activate, bn=True)
self.mlp3 = nn.Linear(512, args.output_pts * 3)
def forward(self, x):
x = self.mlp1(x)
x = self.mlp2(x)
x = self.mlp3(x)
return x
class RegionReconstruction(nn.Module):
"""
Region Reconstruction Network - Reconstruction of a deformed region.
For more details see https://arxiv.org/pdf/2003.12641.pdf
"""
def __init__(self, args, input_size):
super(RegionReconstruction, self).__init__()
self.args = args
self.of1 = 256
self.of2 = 256
self.of3 = 128
self.bn1 = nn.BatchNorm1d(self.of1)
self.bn2 = nn.BatchNorm1d(self.of2)
self.bn3 = nn.BatchNorm1d(self.of3)
self.conv1 = nn.Conv1d(input_size, self.of1, kernel_size=1, bias=False)
self.conv2 = nn.Conv1d(self.of1, self.of2, kernel_size=1, bias=False)
self.conv3 = nn.Conv1d(self.of2, self.of3, kernel_size=1, bias=False)
self.conv4 = nn.Conv1d(self.of3, 3, kernel_size=1, bias=False)
def forward(self, x):
x = F.leaky_relu(self.bn1(self.conv1(x)), negative_slope=0.2)
x = F.leaky_relu(self.bn2(self.conv2(x)), negative_slope=0.2)
x = F.leaky_relu(self.bn3(self.conv3(x)), negative_slope=0.2)
x = self.conv4(x)
return x.permute(0, 2, 1)
class ReverseLayerF(Function):
@staticmethod
def forward(ctx, x, alpha):
ctx.alpha = alpha
return x.view_as(x)
@staticmethod
def backward(ctx, grad_output):
output = grad_output.neg() * ctx.alpha
return output, None