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train.py
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train.py
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import sys
import os
import threading
import torch
from torch.autograd import Variable
import torch.utils.data
from lr_scheduler import *
import numpy
from AverageMeter import *
from loss_function import *
import datasets
import balancedsampler
import networks
from my_args import args
def train():
torch.manual_seed(args.seed)
model = networks.__dict__[args.netName](channel=args.channels,
filter_size = args.filter_size ,
timestep=args.time_step,
training=True)
if args.use_cuda:
print("Turn the model into CUDA")
model = model.cuda()
if not args.SAVED_MODEL==None:
args.SAVED_MODEL ='../model_weights/'+ args.SAVED_MODEL + "/best" + ".pth"
print("Fine tuning on " + args.SAVED_MODEL)
if not args.use_cuda:
pretrained_dict = torch.load(args.SAVED_MODEL, map_location=lambda storage, loc: storage)
# model.load_state_dict(torch.load(args.SAVED_MODEL, map_location=lambda storage, loc: storage))
else:
pretrained_dict = torch.load(args.SAVED_MODEL)
# model.load_state_dict(torch.load(args.SAVED_MODEL))
#print([k for k,v in pretrained_dict.items()])
model_dict = model.state_dict()
# 1. filter out unnecessary keys
pretrained_dict = {k: v for k, v in pretrained_dict.items() if k in model_dict}
# 2. overwrite entries in the existing state dict
model_dict.update(pretrained_dict)
# 3. load the new state dict
model.load_state_dict(model_dict)
pretrained_dict = None
if type(args.datasetName) == list:
train_sets, test_sets = [],[]
for ii, jj in zip(args.datasetName, args.datasetPath):
tr_s, te_s = datasets.__dict__[ii](jj, split = args.dataset_split,single = args.single_output, task = args.task)
train_sets.append(tr_s)
test_sets.append(te_s)
train_set = torch.utils.data.ConcatDataset(train_sets)
test_set = torch.utils.data.ConcatDataset(test_sets)
else:
train_set, test_set = datasets.__dict__[args.datasetName](args.datasetPath)
train_loader = torch.utils.data.DataLoader(
train_set, batch_size = args.batch_size,
sampler=balancedsampler.RandomBalancedSampler(train_set, int(len(train_set) / args.batch_size )),
num_workers= args.workers, pin_memory=True if args.use_cuda else False)
val_loader = torch.utils.data.DataLoader(test_set, batch_size=args.batch_size,
num_workers=args.workers, pin_memory=True if args.use_cuda else False)
print('{} samples found, {} train samples and {} test samples '.format(len(test_set)+len(train_set),
len(train_set),
len(test_set)))
# if not args.lr == 0:
print("train the interpolation net")
optimizer = torch.optim.Adamax([
{'params': model.initScaleNets_filter.parameters(), 'lr': args.filter_lr_coe * args.lr},
{'params': model.initScaleNets_filter1.parameters(), 'lr': args.filter_lr_coe * args.lr},
{'params': model.initScaleNets_filter2.parameters(), 'lr': args.filter_lr_coe * args.lr},
{'params': model.ctxNet.parameters(), 'lr': args.ctx_lr_coe * args.lr},
{'params': model.flownets.parameters(), 'lr': args.flow_lr_coe * args.lr},
{'params': model.depthNet.parameters(), 'lr': args.depth_lr_coe * args.lr},
{'params': model.rectifyNet.parameters(), 'lr': args.rectify_lr}
],
lr=args.lr, betas=(0.9, 0.999), eps=1e-8, weight_decay=args.weight_decay)
scheduler = ReduceLROnPlateau(optimizer, 'min',factor=args.factor, patience=args.patience,verbose=True)
print("*********Start Training********")
print("LR is: "+ str(float(optimizer.param_groups[0]['lr'])))
print("EPOCH is: "+ str(int(len(train_set) / args.batch_size )))
print("Num of EPOCH is: "+ str(args.numEpoch))
def count_network_parameters(model):
parameters = filter(lambda p: p.requires_grad, model.parameters())
N = sum([numpy.prod(p.size()) for p in parameters])
return N
print("Num. of model parameters is :" + str(count_network_parameters(model)))
if hasattr(model,'flownets'):
print("Num. of flow model parameters is :" +
str(count_network_parameters(model.flownets)))
if hasattr(model,'initScaleNets_occlusion'):
print("Num. of initScaleNets_occlusion model parameters is :" +
str(count_network_parameters(model.initScaleNets_occlusion) +
count_network_parameters(model.initScaleNets_occlusion1) +
count_network_parameters(model.initScaleNets_occlusion2)))
if hasattr(model,'initScaleNets_filter'):
print("Num. of initScaleNets_filter model parameters is :" +
str(count_network_parameters(model.initScaleNets_filter) +
count_network_parameters(model.initScaleNets_filter1) +
count_network_parameters(model.initScaleNets_filter2)))
if hasattr(model, 'ctxNet'):
print("Num. of ctxNet model parameters is :" +
str(count_network_parameters(model.ctxNet)))
if hasattr(model, 'depthNet'):
print("Num. of depthNet model parameters is :" +
str(count_network_parameters(model.depthNet)))
if hasattr(model,'rectifyNet'):
print("Num. of rectifyNet model parameters is :" +
str(count_network_parameters(model.rectifyNet)))
training_losses = AverageMeter()
auxiliary_data = []
saved_total_loss = 10e10
saved_total_PSNR = -1
ikk = 0
for kk in optimizer.param_groups:
if kk['lr'] > 0:
ikk = kk
break
for t in range(args.numEpoch):
print("The id of this in-training network is " + str(args.uid))
print(args)
#Turn into training mode
model = model.train()
for i, (X0_half,X1_half, y_half) in enumerate(train_loader):
if i >= 10 : #int(len(train_set) / args.batch_size ):
#(0 if t == 0 else EPOCH):#
break
X0_half = X0_half.cuda() if args.use_cuda else X0_half
X1_half = X1_half.cuda() if args.use_cuda else X1_half
y_half = y_half.cuda() if args.use_cuda else y_half
X0 = Variable(X0_half, requires_grad= False)
X1 = Variable(X1_half, requires_grad= False)
y = Variable(y_half,requires_grad= False)
diffs, offsets,filters,occlusions = model(torch.stack((X0,y,X1),dim = 0))
pixel_loss, offset_loss, sym_loss = part_loss(diffs,offsets,occlusions, [X0,X1],epsilon=args.epsilon)
total_loss = sum(x*y if x > 0 else 0 for x,y in zip(args.alpha, pixel_loss))
training_losses.update(total_loss.item(), args.batch_size)
if i % max(1, int(int(len(train_set) / args.batch_size )/500.0)) == 0:
print("Ep [" + str(t) +"/" + str(i) +
"]\tl.r.: " + str(round(float(ikk['lr']),7))+
"\tPix: " + str([round(x.item(),5) for x in pixel_loss]) +
"\tTV: " + str([round(x.item(),4) for x in offset_loss]) +
"\tSym: " + str([round(x.item(), 4) for x in sym_loss]) +
"\tTotal: " + str([round(x.item(),5) for x in [total_loss]]) +
"\tAvg. Loss: " + str([round(training_losses.avg, 5)]))
optimizer.zero_grad()
total_loss.backward()
optimizer.step()
if t == 1:
# delete the pre validation weights for cleaner workspace
if os.path.exists(args.save_path + "/epoch" + str(0) +".pth" ):
os.remove(args.save_path + "/epoch" + str(0) +".pth")
if os.path.exists(args.save_path + "/epoch" + str(t-1) +".pth"):
os.remove(args.save_path + "/epoch" + str(t-1) +".pth")
torch.save(model.state_dict(), args.save_path + "/epoch" + str(t) +".pth")
# print("\t\t**************Start Validation*****************")
#Turn into evaluation mode
val_total_losses = AverageMeter()
val_total_pixel_loss = AverageMeter()
val_total_PSNR_loss = AverageMeter()
val_total_tv_loss = AverageMeter()
val_total_pws_loss = AverageMeter()
val_total_sym_loss = AverageMeter()
for i, (X0,X1,y) in enumerate(val_loader):
if i >= int(len(test_set)/ args.batch_size):
break
with torch.no_grad():
X0 = X0.cuda() if args.use_cuda else X0
X1 = X1.cuda() if args.use_cuda else X1
y = y.cuda() if args.use_cuda else y
diffs, offsets,filters,occlusions = model(torch.stack((X0,y,X1),dim = 0))
pixel_loss, offset_loss,sym_loss = part_loss(diffs, offsets, occlusions, [X0,X1],epsilon=args.epsilon)
val_total_loss = sum(x * y for x, y in zip(args.alpha, pixel_loss))
per_sample_pix_error = torch.mean(torch.mean(torch.mean(diffs[args.save_which] ** 2,
dim=1),dim=1),dim=1)
per_sample_pix_error = per_sample_pix_error.data # extract tensor
psnr_loss = torch.mean(20 * torch.log(1.0/torch.sqrt(per_sample_pix_error)))/torch.log(torch.Tensor([10]))
#
val_total_losses.update(val_total_loss.item(),args.batch_size)
val_total_pixel_loss.update(pixel_loss[args.save_which].item(), args.batch_size)
val_total_tv_loss.update(offset_loss[0].item(), args.batch_size)
val_total_sym_loss.update(sym_loss[0].item(), args.batch_size)
val_total_PSNR_loss.update(psnr_loss[0],args.batch_size)
print(".",end='',flush=True)
print("\nEpoch " + str(int(t)) +
"\tlearning rate: " + str(float(ikk['lr'])) +
"\tAvg Training Loss: " + str(round(training_losses.avg,5)) +
"\tValidate Loss: " + str([round(float(val_total_losses.avg), 5)]) +
"\tValidate PSNR: " + str([round(float(val_total_PSNR_loss.avg), 5)]) +
"\tPixel Loss: " + str([round(float(val_total_pixel_loss.avg), 5)]) +
"\tTV Loss: " + str([round(float(val_total_tv_loss.avg), 4)]) +
"\tPWS Loss: " + str([round(float(val_total_pws_loss.avg), 4)]) +
"\tSym Loss: " + str([round(float(val_total_sym_loss.avg), 4)])
)
auxiliary_data.append([t, float(ikk['lr']),
training_losses.avg, val_total_losses.avg, val_total_pixel_loss.avg,
val_total_tv_loss.avg,val_total_pws_loss.avg,val_total_sym_loss.avg])
numpy.savetxt(args.log, numpy.array(auxiliary_data), fmt='%.8f', delimiter=',')
training_losses.reset()
print("\t\tFinished an epoch, Check and Save the model weights")
# we check the validation loss instead of training loss. OK~
if saved_total_loss >= val_total_losses.avg:
saved_total_loss = val_total_losses.avg
torch.save(model.state_dict(), args.save_path + "/best"+".pth")
print("\t\tBest Weights updated for decreased validation loss\n")
else:
print("\t\tWeights Not updated for undecreased validation loss\n")
#schdule the learning rate
scheduler.step(val_total_losses.avg)
print("*********Finish Training********")
if __name__ == '__main__':
sys.setrecursionlimit(100000)# 0xC00000FD exception for the recursive detach of gradients.
threading.stack_size(200000000)# 0xC00000FD exception for the recursive detach of gradients.
thread = threading.Thread(target=train)
thread.start()
thread.join()
exit(0)