-
Notifications
You must be signed in to change notification settings - Fork 0
/
train_unet.py
70 lines (61 loc) · 2.54 KB
/
train_unet.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
import time
import os
import numpy as np
from torch.utils.data import DataLoader
import torch
from torch.optim import Adam
import torch.nn as nn
# local imports
from data.sevir_dataset import SevirDataset
from models.sevir_generator import Unet
from models.sevir_discriminator import NLayerDiscriminator, NLayerDiscriminatorSN
from utils.train import *
from utils.eval import *
from utils.parse_args import *
if __name__ == "__main__":
# parse cli args
opt = parse_train_args()
# random seed
torch.manual_seed(opt.seed)
np.random.seed(opt.seed)
# U-Net generator
generator = Unet()
if opt.pretrained_encoder:
# load pretained encoder
save_dict = torch.load(opt.encoder_checkpoint, map_location='cpu')
# filter for keys we have in generator
saved_dict = {k[9:]: v for k, v in save_dict['state_dict'].items() if
(k.startswith('backbone.') and ('inc' in k or 'down' in k))}
# update state dict
generator_state = generator.state_dict()
generator_state.update(saved_dict)
generator.load_state_dict(generator_state)
generator = generator.to(opt.device)
if opt.multi_gpu: # on supercloud this will always be 2 gpus
generator = nn.DataParallel(generator, [0,1])
# discriminator if training adversarially
if opt.loss_function == 'adversarial':
# conditional GAN - discriminator takes in both src and tgt views
if opt.spectral_norm_discriminator:
discriminator = NLayerDiscriminatorSN(opt.input_nc + opt.output_nc)
else:
discriminator = NLayerDiscriminator(opt.input_nc + opt.output_nc)
discriminator = discriminator.to(opt.device)
if opt.multi_gpu: # on supercloud this will always be 2 gpus
discriminator = nn.DataParallel(discriminator, [0,1])
model = (generator, discriminator)
else:
model = generator
# data
train_dataset = SevirDataset(opt)
train_dataloader = DataLoader(train_dataset, batch_size=opt.batch_size, num_workers=32)
# train
train_fn = eval("train_{}_{}".format(opt.optimization, opt.loss_function))
for epoch in range(opt.n_epochs):
t1 = time.time()
train_fn(model, train_dataloader, opt, epoch)
t2 = time.time()
print ("one epoch took {} seconds".format(t2-t1))
torch.save(generator.state_dict(), os.path.join(opt.checkpoint, "generator_last.pt"))
if opt.loss_function == 'adversarial':
torch.save(discriminator.state_dict(), os.path.join(opt.checkpoint, "discriminator_last.pt"))