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source_trainer.py
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from __future__ import division
import os
import torch
from tensorboard_logger import configure, log_value
from torch.autograd import Variable
from torch.utils import data
from tqdm import tqdm
from argmyparse import get_src_only_training_parser, add_additional_params_to_args
from datasets import get_dataset
from joint_transforms import get_joint_transform
from loss import CrossEntropyLoss2d
from models.model_util import get_optimizer, get_full_model, fix_batchnorm_when_training # check_training
from transform import get_img_transform, \
get_lbl_transform
from util import check_if_done, save_checkpoint, adjust_learning_rate, emphasize_str, get_class_weight_from_file
from util import mkdir_if_not_exist, save_dic_to_json
parser = get_src_only_training_parser()
args = parser.parse_args()
args = add_additional_params_to_args(args)
if args.resume:
print("=> loading checkpoint '{}'".format(args.resume))
if not os.path.exists(args.resume):
raise OSError("%s does not exist!" % args.resume)
end_epoch = args.epochs
indir, infn = os.path.split(args.resume)
old_savename = args.savename
args.savename = infn.split("-")[0]
print ("savename is %s (original savename %s was overwritten)" % (args.savename, old_savename))
checkpoint = torch.load(args.resume)
args = checkpoint['args'] # Load args!
model = get_full_model(net=args.net, res=args.res, n_class=args.n_class, input_ch=args.input_ch)
optimizer = get_optimizer(model.parameters(), opt=args.opt, lr=args.lr, momentum=args.momentum,
weight_decay=args.weight_decay)
model.load_state_dict(checkpoint['state_dict'])
optimizer.load_state_dict(checkpoint['optimizer'])
print("=> loaded checkpoint '{}'".format(args.resume))
json_fn = os.path.join(args.outdir, "param_%s_resume.json" % args.savename)
check_if_done(json_fn)
args.machine = os.uname()[1]
save_dic_to_json(args.__dict__, json_fn)
start_epoch = checkpoint['epoch']
else:
model = get_full_model(net=args.net, res=args.res, n_class=args.n_class, input_ch=args.input_ch)
optimizer = get_optimizer(model.parameters(), opt=args.opt, lr=args.lr, momentum=args.momentum,
weight_decay=args.weight_decay)
args.outdir = os.path.join(args.base_outdir, "%s-%s_only_%sch" % (args.src_dataset, args.split, args.input_ch))
args.pth_dir = os.path.join(args.outdir, "pth")
if args.net in ["fcn", "psp"]:
model_name = "%s-%s-res%s" % (args.savename, args.net, args.res)
else:
model_name = "%s-%s" % (args.savename, args.net)
args.tflog_dir = os.path.join(args.outdir, "tflog", model_name)
mkdir_if_not_exist(args.pth_dir)
mkdir_if_not_exist(args.tflog_dir)
json_fn = os.path.join(args.outdir, "param-%s.json" % model_name)
check_if_done(json_fn)
args.machine = os.uname()[1]
save_dic_to_json(args.__dict__, json_fn)
start_epoch = 0
end_epoch = args.epochs
print (start_epoch, end_epoch)
train_img_shape = tuple([int(x) for x in args.train_img_shape])
use_crop = True if args.crop_size > 0 else False
joint_transform = get_joint_transform(crop_size=args.crop_size, rotate_angle=args.rotate_angle) if use_crop else None
img_transform = get_img_transform(img_shape=train_img_shape, normalize_way=args.normalize_way, use_crop=use_crop)
label_transform = get_lbl_transform(img_shape=train_img_shape, n_class=args.n_class, background_id=args.background_id,
use_crop=use_crop)
src_dataset = get_dataset(dataset_name=args.src_dataset, split=args.split, img_transform=img_transform,
label_transform=label_transform, test=False, input_ch=args.input_ch,
joint_transform=joint_transform)
kwargs = {'num_workers': 1, 'pin_memory': True} if torch.cuda.is_available() else {}
train_loader = torch.utils.data.DataLoader(src_dataset, batch_size=args.batch_size, shuffle=True, **kwargs)
weight = get_class_weight_from_file(n_class=args.n_class, weight_filename=args.loss_weights_file,
add_bg_loss=args.add_bg_loss)
if torch.cuda.is_available():
model.cuda()
weight = weight.cuda()
criterion = CrossEntropyLoss2d(weight)
configure(args.tflog_dir, flush_secs=5)
model.train()
if args.fix_bn:
print (emphasize_str("BN layers are NOT trained!"))
fix_batchnorm_when_training(model)
# check_training(model)
for epoch in range(start_epoch, end_epoch):
epoch_loss = 0
for ind, (images, labels) in tqdm(enumerate(train_loader)):
imgs = Variable(images)
lbls = Variable(labels)
if torch.cuda.is_available():
imgs, lbls = imgs.cuda(), lbls.cuda()
# update generator and classifiers by source samples
optimizer.zero_grad()
preds = model(imgs)
if args.net == "psp":
preds = preds[0]
loss = criterion(preds, lbls)
loss.backward()
c_loss = loss.data[0]
epoch_loss += c_loss
optimizer.step()
# if ind % 100 == 0:
# print("iter [%d] CLoss: %.4f" % (ind, c_loss))
if ind > args.max_iter:
break
print("Epoch [%d] Loss: %.4f" % (epoch + 1, epoch_loss))
log_value('loss', epoch_loss, epoch)
log_value('lr', args.lr, epoch)
if args.adjust_lr:
args.lr = adjust_learning_rate(optimizer, args.lr, args.weight_decay, epoch, args.epochs)
if args.net == "fcn" or args.net == "psp":
checkpoint_fn = os.path.join(args.pth_dir, "%s-%s-res%s-%s.pth.tar" % (
args.savename, args.net, args.res, epoch + 1))
else:
checkpoint_fn = os.path.join(args.pth_dir, "%s-%s-%s.pth.tar" % (
args.savename, args.net, epoch + 1))
args.start_epoch = epoch + 1
save_dic = {
'args': args,
'epoch': epoch + 1,
'state_dict': model.state_dict(),
'optimizer': optimizer.state_dict()
}
save_checkpoint(save_dic, is_best=False, filename=checkpoint_fn)