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train_polyp.py
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train_polyp.py
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import os
import numpy as np
import argparse
from datetime import datetime
import logging
import torch
import torch.nn.functional as F
from torch.autograd import Variable
from torch.nn.modules.loss import CrossEntropyLoss
import matplotlib.pyplot as plt
from lib.networks import PVT_CASCADE
from utils.dataloader import get_loader, test_dataset
from utils.utils import clip_gradient, adjust_lr, AvgMeter
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()
def test(model, path, dataset):
data_path = os.path.join(path, dataset)
image_root = '{}/images/'.format(data_path)
gt_root = '{}/masks/'.format(data_path)
model.eval()
num1 = len(os.listdir(gt_root))
test_loader = test_dataset(image_root, gt_root, opt.img_size)
DSC = 0.0
for i in range(num1):
image, gt, name = test_loader.load_data()
gt = np.asarray(gt, np.float32)
gt /= (gt.max() + 1e-8)
image = image.cuda()
res1, res2, res3, res4 = model(image) # forward
res = F.upsample(res1 + res2 + res3 + res4, size=gt.shape, mode='bilinear', align_corners=False) # additive aggregation and upsampling
res = res.sigmoid().data.cpu().numpy().squeeze() # apply sigmoid aggregation for binary segmentation
res = (res - res.min()) / (res.max() - res.min() + 1e-8)
# eval Dice
input = res
target = np.array(gt)
N = gt.shape
smooth = 1
input_flat = np.reshape(input, (-1))
target_flat = np.reshape(target, (-1))
intersection = (input_flat * target_flat)
dice = (2 * intersection.sum() + smooth) / (input.sum() + target.sum() + smooth)
dice = '{:.4f}'.format(dice)
dice = float(dice)
DSC = DSC + dice
return DSC / num1, num1
def train(train_loader, model, optimizer, epoch, test_path, model_name = 'PVT-CASCADE'):
model.train()
global best
size_rates = [0.75, 1, 1.25]
loss_record = AvgMeter()
for i, pack in enumerate(train_loader, start=1):
for rate in size_rates:
optimizer.zero_grad()
# ---- data prepare ----
images, gts = pack
images = Variable(images).cuda()
gts = Variable(gts).cuda()
# ---- rescale ----
trainsize = int(round(opt.img_size * rate / 32) * 32)
if rate != 1:
images = F.upsample(images, size=(trainsize, trainsize), mode='bilinear', align_corners=True)
gts = F.upsample(gts, size=(trainsize, trainsize), mode='bilinear', align_corners=True)
# ---- forward ----
P1, P2, P3, P4= model(images)
# ---- loss function ----
loss_P1 = structure_loss(P1, gts)
loss_P2 = structure_loss(P2, gts)
loss_P3 = structure_loss(P3, gts)
loss_P4 = structure_loss(P4, gts)
alpha, beta, gamma, zeta = 1., 1., 1., 1.
loss = alpha * loss_P1 + beta * loss_P2 + gamma * loss_P3 + zeta * loss_P4 # current setting is for additive aggregation.
# ---- backward ----
loss.backward()
clip_gradient(optimizer, opt.clip)
optimizer.step()
# ---- recording loss ----
if rate == 1:
loss_record.update(loss.data, opt.batchsize)
# ---- train visualization ----
if i % 20 == 0 or i == total_step:
print('{} Epoch [{:03d}/{:03d}], Step [{:04d}/{:04d}], '
' loss: {:0.4f}]'.
format(datetime.now(), epoch, opt.epoch, i, total_step,
loss_record.show()))
# save model
save_path = (opt.train_save)
if not os.path.exists(save_path):
os.makedirs(save_path)
torch.save(model.state_dict(), save_path + '' + model_name + '-last.pth')
# choose the best model
global dict_plot
if (epoch + 1) % 1 == 0:
total_dice = 0
total_images = 0
for dataset in ['CVC-300', 'CVC-ClinicDB', 'Kvasir', 'CVC-ColonDB', 'ETIS-LaribPolypDB']:
dataset_dice, n_images = test(model, test_path, dataset)
total_dice += (n_images*dataset_dice)
total_images += n_images
logging.info('epoch: {}, dataset: {}, dice: {}'.format(epoch, dataset, dataset_dice))
print(dataset, ': ', dataset_dice)
dict_plot[dataset].append(dataset_dice)
meandice = total_dice/total_images
dict_plot['test'].append(meandice)
print('Validation dice score: {}'.format(meandice))
logging.info('Validation dice score: {}'.format(meandice))
if meandice > best:
print('##################### Dice score improved from {} to {}'.format(best, meandice))
logging.info('##################### Dice score improved from {} to {}'.format(best, meandice))
best = meandice
torch.save(model.state_dict(), save_path + '' + model_name + '.pth')
torch.save(model.state_dict(), save_path +str(epoch)+ '' + model_name + '-best.pth')
if __name__ == '__main__':
dict_plot = {'CVC-300':[], 'CVC-ClinicDB':[], 'Kvasir':[], 'CVC-ColonDB':[], 'ETIS-LaribPolypDB':[], 'test':[]}
name = ['CVC-300', 'CVC-ClinicDB', 'Kvasir', 'CVC-ColonDB', 'ETIS-LaribPolypDB', 'test']
##################model_name#############################
model_name = 'PolypPVT-CASCADE'
###############################################
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('--optimizer', type=str,
default='AdamW', help='choosing optimizer AdamW or SGD')
parser.add_argument('--augmentation',
default=False, help='choose to do random flip rotation')
parser.add_argument('--batchsize', type=int,
default=16, help='training batch size')
parser.add_argument('--img_size', 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=200, help='every n epochs decay learning rate')
parser.add_argument('--train_path', type=str,
default='./data/polyp/TrainDataset/',
help='path to train dataset')
parser.add_argument('--test_path', type=str,
default='./data/polyp/TestDataset/',
help='path to testing Kvasir dataset')
parser.add_argument('--train_save', type=str,
default='./model_pth/'+model_name+'/')
opt = parser.parse_args()
logging.basicConfig(filename='train_log_'+model_name+'.log',
format='[%(asctime)s-%(filename)s-%(levelname)s:%(message)s]',
level=logging.INFO, filemode='a', datefmt='%Y-%m-%d %I:%M:%S %p')
# ---- build models ----
#torch.cuda.set_device(2) # set your gpu device
model = PVT_CASCADE()
model.cuda()
best = 0
params = model.parameters()
if opt.optimizer == 'AdamW':
optimizer = torch.optim.AdamW(params, opt.lr, weight_decay=1e-4)
else:
optimizer = torch.optim.SGD(params, opt.lr, weight_decay=1e-4, momentum=0.9)
print(optimizer)
image_root = '{}/images/'.format(opt.train_path)
gt_root = '{}/masks/'.format(opt.train_path)
train_loader = get_loader(image_root, gt_root, batchsize=opt.batchsize, trainsize=opt.img_size,
augmentation=opt.augmentation)
total_step = len(train_loader)
print("#" * 20, "Start Training", "#" * 20)
for epoch in range(1, opt.epoch):
adjust_lr(optimizer, opt.lr, epoch, opt.decay_rate, opt.decay_epoch)
train(train_loader, model, optimizer, epoch, opt.test_path, model_name = model_name)