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train_gan.py
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train_gan.py
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import os
import random
import logging
from PIL import ImageFile, Image
import math
import torch
import torch.nn as nn
import torch.optim as optim
import torch.nn.functional as F
from torch.utils.tensorboard import SummaryWriter
from torch.utils.data import DataLoader
from torchvision import transforms
from compressai.datasets import ImageFolder
from utils.logger import setup_logger
from utils.utils import CustomDataParallel, save_checkpoint
from utils.optimizers import configure_optimizers
from utils.training import train_one_epoch_gan
from utils.testing import test_one_epoch_gan
from loss.rd_loss import RateDistortionPOELICLoss
from utils.args import train_options
from config.config_5group import model_config
from models.models import ELIC
from models.disc import Discriminator, init_weights
import random
import numpy as np
def setup_seed(seed=3407):
os.environ['PYTHONHASHSEED'] = str(seed)
torch.manual_seed(seed)
torch.cuda.manual_seed(seed)
torch.cuda.manual_seed_all(seed)
np.random.seed(seed)
random.seed(seed)
torch.backends.cudnn.benchmark = False
torch.backends.cudnn.enable = False
return seed
def main():
torch.backends.cudnn.benchmark = True
ImageFile.LOAD_TRUNCATED_IMAGES = True
Image.MAX_IMAGE_PIXELS = None
seed = setup_seed()
args = train_options()
config = model_config()
os.environ['CUDA_VISIBLE_DEVICES'] = ', '.join(str(id) for id in args.gpu_id)
device = "cuda" if args.cuda and torch.cuda.is_available() else "cpu"
if not os.path.exists(os.path.join('./experiments', args.experiment)):
os.makedirs(os.path.join('./experiments', args.experiment))
setup_logger('train', os.path.join('./experiments', args.experiment), 'train_' + args.experiment, level=logging.INFO,
screen=True, tofile=True)
setup_logger('val', os.path.join('./experiments', args.experiment), 'val_' + args.experiment, level=logging.INFO,
screen=True, tofile=True)
logger_train = logging.getLogger('train')
logger_val = logging.getLogger('val')
tb_logger = SummaryWriter(log_dir='./tb_logger/' + args.experiment)
if not os.path.exists(os.path.join('./experiments', args.experiment, 'checkpoints')):
os.makedirs(os.path.join('./experiments', args.experiment, 'checkpoints'))
train_transforms = transforms.Compose(
[transforms.RandomCrop(args.patch_size), transforms.ToTensor()]
)
test_transforms = transforms.Compose(
[transforms.ToTensor()]
)
train_dataset = ImageFolder(args.dataset, split="kodak", transform=train_transforms)
test_dataset = ImageFolder(args.dataset, split="kodak", transform=test_transforms)
train_dataloader = DataLoader(
train_dataset,
batch_size=args.batch_size,
num_workers=args.num_workers,
shuffle=True,
pin_memory=(device == "cuda"),
)
test_dataloader = DataLoader(
test_dataset,
batch_size=args.test_batch_size,
num_workers=args.num_workers,
shuffle=False,
pin_memory=(device == "cuda"),
)
net = ELIC(config=config)
net_disc = Discriminator()
if args.cuda and torch.cuda.device_count() > 1:
net = CustomDataParallel(net)
net_disc = CustomDataParallel(net_disc)
net = net.to(device)
net_disc.to(device)
init_weights(net_disc, init_type='normal', init_gain=0.02)
optimizer, aux_optimizer = configure_optimizers(net, args)
# lr_scheduler = optim.lr_scheduler.ReduceLROnPlateau(optimizer, "min")
lr_scheduler = optim.lr_scheduler.MultiStepLR(optimizer, milestones=[80, 100], gamma=0.1)
optimizer_D = torch.optim.Adam(net_disc.parameters(), lr=args.lr_D)
lr_scheduler_D = optim.lr_scheduler.MultiStepLR(optimizer_D, milestones=[80, 100], gamma=0.1)
criterion = RateDistortionPOELICLoss(lmbda=args.lmbda, device=device, gpu_id=args.gpu_id)
if args.checkpoint != None:
checkpoint = torch.load(args.checkpoint)
net.load_state_dict(checkpoint["state_dict"])
optimizer.load_state_dict(checkpoint['optimizer'])
aux_optimizer.load_state_dict(checkpoint['aux_optimizer'])
# lr_scheduler.load_state_dict(checkpoint['lr_scheduler'])
lr_scheduler = optim.lr_scheduler.MultiStepLR(optimizer, milestones=[450,550], gamma=0.1)
lr_scheduler._step_count = checkpoint['lr_scheduler']['_step_count']
lr_scheduler.last_epoch = checkpoint['lr_scheduler']['last_epoch']
# print(lr_scheduler.state_dict())
start_epoch = checkpoint['epoch']
best_loss = checkpoint['loss']
current_step = start_epoch * math.ceil(len(train_dataloader.dataset) / args.batch_size)
checkpoint = None
else:
start_epoch = 0
best_loss = 1e10
current_step = 0
logger_train.info(f"Seed: {seed}")
logger_train.info(args)
# logger_train.info(net)
optimizer.param_groups[0]['lr'] = args.learning_rate
for epoch in range(start_epoch, args.epochs):
logger_train.info(f"Learning rate: {optimizer.param_groups[0]['lr']}")
current_step = train_one_epoch_gan(
net,
net_disc,
criterion,
train_dataloader,
optimizer,
aux_optimizer,
optimizer_D,
epoch,
args.clip_max_norm,
logger_train,
tb_logger,
current_step
)
save_dir = os.path.join('./experiments', args.experiment, 'val_images', '%03d' % (epoch + 1))
loss = test_one_epoch_gan(epoch, test_dataloader, net, net_disc, criterion, save_dir, logger_val, tb_logger)
# lr_scheduler.step(loss)
lr_scheduler.step()
lr_scheduler_D.step()
is_best = loss < best_loss
best_loss = min(loss, best_loss)
net.update(force=True)
if args.save:
save_checkpoint(
{
"epoch": epoch + 1,
"state_dict": net.state_dict(),
"loss": loss,
"optimizer": optimizer.state_dict(),
"aux_optimizer": aux_optimizer.state_dict(),
"lr_scheduler": lr_scheduler.state_dict(),
},
is_best,
os.path.join('./experiments', args.experiment, 'checkpoints', "checkpoint_%03d.pth.tar" % (epoch + 1))
)
if is_best:
logger_val.info('best checkpoint saved.')
if __name__ == '__main__':
main()