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Training.py
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Training.py
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import os
import torch
import torch.nn.functional as F
import numpy as np
from datetime import datetime
from torchvision.utils import make_grid
from lib.PraNet_Res2Net import PraNet
from utils.data import get_loader, test_dataset
from utils.utils import clip_gradient, adjust_lr
from tensorboardX import SummaryWriter
import logging
import torch.backends.cudnn as cudnn
# loss function from F3Net'AAAI'2020
def structure_loss(pred, mask):
weit = 1 + 5 * torch.abs(F.avg_pool2d(mask, kernel_size=31, stride=1, padding=15) - mask)
wbce = F.binary_cross_entropy_with_logits(pred, mask, reduce='none')
wbce = (weit * wbce).sum(dim=(2, 3)) / weit.sum(dim=(2, 3))
pred = torch.sigmoid(pred)
inter = ((pred * mask) * weit).sum(dim=(2, 3))
union = ((pred + mask) * weit).sum(dim=(2, 3))
wiou = 1 - (inter + 1) / (union - inter + 1)
return (wbce + wiou).mean()
# train function
def train(train_loader, model, optimizer, epoch, save_path, writer):
global step
model.train()
loss_all = 0
epoch_step = 0
try:
for i, (images, gts) in enumerate(train_loader, start=1):
optimizer.zero_grad()
images = images.cuda()
gts = gts.cuda()
preds = model(images)
loss_init = structure_loss(preds[0], gts) + structure_loss(preds[1], gts) + structure_loss(preds[2], gts)
loss_final = structure_loss(preds[3], gts)
loss = loss_init + loss_final
loss.backward()
clip_gradient(optimizer, opt.clip)
optimizer.step()
step += 1
epoch_step += 1
loss_all += loss.data
if i % 20 == 0 or i == total_step or i == 1:
print('{} Epoch [{:03d}/{:03d}], Step [{:04d}/{:04d}], Total_loss: {:.4f} Loss1: {:.4f} Loss2: {:0.4f}'.
format(datetime.now(), epoch, opt.epoch, i, total_step, loss.data, loss_init.data,
loss_final.data))
logging.info(
'[Train Info]:Epoch [{:03d}/{:03d}], Step [{:04d}/{:04d}], Total_loss: {:.4f} Loss1: {:.4f} '
'Loss2: {:0.4f}'.
format(epoch, opt.epoch, i, total_step, loss.data, loss_init.data, loss_final.data))
# TensorboardX-Loss
writer.add_scalars('Loss_Statistics',
{'Loss_init': loss_init.data, 'Loss_final': loss_final.data,
'Loss_total': loss.data},
global_step=step)
# TensorboardX-Training Data
grid_image = make_grid(images[0].clone().cpu().data, 1, normalize=True)
writer.add_image('RGB', grid_image, step)
grid_image = make_grid(gts[0].clone().cpu().data, 1, normalize=True)
writer.add_image('GT', grid_image, step)
# TensorboardX-Outputs
res = preds[0][0].clone()
res = res.sigmoid().data.cpu().numpy().squeeze()
res = (res - res.min()) / (res.max() - res.min() + 1e-8)
writer.add_image('Pred_init', torch.tensor(res), step, dataformats='HW')
res = preds[3][0].clone()
res = res.sigmoid().data.cpu().numpy().squeeze()
res = (res - res.min()) / (res.max() - res.min() + 1e-8)
writer.add_image('Pred_final', torch.tensor(res), step, dataformats='HW')
loss_all /= epoch_step
logging.info('[Train Info]: Epoch [{:03d}/{:03d}], Loss_AVG: {:.4f}'.format(epoch, opt.epoch, loss_all))
writer.add_scalar('Loss-epoch', loss_all, global_step=epoch)
if epoch % 50 == 0:
torch.save(model.state_dict(), save_path + 'Net_epoch_{}.pth'.format(epoch))
except KeyboardInterrupt:
print('Keyboard Interrupt: save model and exit.')
if not os.path.exists(save_path):
os.makedirs(save_path)
torch.save(model.state_dict(), save_path + 'Net_epoch_{}.pth'.format(epoch + 1))
print('Save checkpoints successfully!')
raise
# test_in_train function
def val(test_loader, model, epoch, save_path, writer):
global best_mae, best_epoch
model.eval()
with torch.no_grad():
mae_sum = 0
for i in range(test_loader.size):
image, gt, name, img_for_post = test_loader.load_data()
gt = np.asarray(gt, np.float32)
gt /= (gt.max() + 1e-8)
image = image.cuda()
res = model(image)
res = F.upsample(res[3], size=gt.shape, mode='bilinear', align_corners=False)
res = res.sigmoid().data.cpu().numpy().squeeze()
res = (res - res.min()) / (res.max() - res.min() + 1e-8)
mae_sum += np.sum(np.abs(res - gt)) * 1.0 / (gt.shape[0] * gt.shape[1])
mae = mae_sum / test_loader.size
writer.add_scalar('MAE', torch.tensor(mae), global_step=epoch)
print('Epoch: {}, MAE: {}, bestMAE: {}, bestEpoch: {}.'.format(epoch, mae, best_mae, best_epoch))
if epoch == 1:
best_mae = mae
else:
if mae < best_mae:
best_mae = mae
best_epoch = epoch
torch.save(model.state_dict(), save_path + 'Net_epoch_best.pth')
print('Save state_dict successfully! Best epoch:{}.'.format(epoch))
logging.info(
'[Val Info]:Epoch:{} MAE:{} bestEpoch:{} bestMAE:{}'.format(epoch, mae, best_epoch, best_mae))
if __name__ == '__main__':
import argparse
parser = argparse.ArgumentParser()
parser.add_argument('--epoch', type=int, default=100, help='epoch number')
parser.add_argument('--lr', type=float, default=1e-4, help='learning rate')
parser.add_argument('--batchsize', type=int, default=36, help='training batch size')
parser.add_argument('--trainsize', type=int, default=352, help='training dataset size')
parser.add_argument('--clip', type=float, default=0.5, help='gradient clipping margin')
parser.add_argument('--decay_rate', type=float, default=0.1, help='decay rate of learning rate')
parser.add_argument('--decay_epoch', type=int, default=50, help='every n epochs decay learning rate')
parser.add_argument('--load', type=str, default=None, help='train from checkpoints')
parser.add_argument('--gpu_id', type=str, default='1', help='train use gpu')
parser.add_argument('--train_root', type=str, default='./data/TrainDataset/Kvasir-SEG/',
help='the training rgb images root')
parser.add_argument('--val_root', type=str, default='./data/ValDataset/Kvasir-SEG/',
help='the test rgb images root')
parser.add_argument('--save_path', type=str,
default='./snapshot/',
help='the path to save model and log')
opt = parser.parse_args()
# set the device for training
if opt.gpu_id == '0':
os.environ["CUDA_VISIBLE_DEVICES"] = "0"
print('USE GPU 0')
elif opt.gpu_id == '1':
os.environ["CUDA_VISIBLE_DEVICES"] = "1"
print('USE GPU 1')
cudnn.benchmark = True
# build the model
model = PraNet(channel=32).cuda()
if opt.load is not None:
model.load_state_dict(torch.load(opt.load))
print('load model from ', opt.load)
optimizer = torch.optim.Adam(model.parameters(), opt.lr)
save_path = opt.save_path
if not os.path.exists(save_path):
os.makedirs(save_path)
# load data
print('load data...')
train_loader = get_loader(image_root=opt.train_root + 'images/',
gt_root=opt.train_root + 'masks/',
batchsize=opt.batchsize,
trainsize=opt.trainsize,
num_workers=8)
val_loader = test_dataset(image_root=opt.val_root + 'images/',
gt_root=opt.val_root + 'masks/',
testsize=opt.trainsize)
total_step = len(train_loader)
# logging
logging.basicConfig(filename=save_path + 'log.log',
format='[%(asctime)s-%(filename)s-%(levelname)s:%(message)s]',
level=logging.INFO, filemode='a', datefmt='%Y-%m-%d %I:%M:%S %p')
logging.info("Network-Train")
logging.info("Config")
logging.info('epoch: {}; lr: {}; batchsize: {}; trainsize: {}; clip: {}; decay_rate: {}; load: {}; '
'save_path: {}; decay_epoch: {}'.format(opt.epoch, opt.lr, opt.batchsize, opt.trainsize, opt.clip,
opt.decay_rate, opt.load, save_path, opt.decay_epoch))
step = 0
writer = SummaryWriter(save_path + 'summary')
best_mae = 1
best_epoch = 0
print("Start train...")
for epoch in range(1, opt.epoch):
cur_lr = adjust_lr(optimizer, opt.lr, epoch, opt.decay_rate, opt.decay_epoch)
writer.add_scalar('learning_rate', cur_lr, global_step=epoch)
train(train_loader, model, optimizer, epoch, save_path, writer)
val(val_loader, model, epoch, save_path, writer)