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dltrainer.py
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from __future__ import print_function
import os, sys, gc
import time
import torch
import torch.nn.functional as F
import numpy as np
from torchvision import transforms
from torch.utils.data import DataLoader
from net_builder import build_net
from dataloader.SceneFlowLoader import SceneFlowDataset
from dataloader.GANet.data import get_training_set, get_test_set
from utils.AverageMeter import AverageMeter
from utils.common import logger
from losses.multiscaleloss import EPE
from utils.preprocess import scale_disp
import skimage
class DisparityTrainer(object):
def __init__(self, net_name, lr, devices, dataset, trainlist, vallist, datapath, batch_size, maxdisp, pretrain=None):
super(DisparityTrainer, self).__init__()
self.net_name = net_name
self.lr = lr
self.current_lr = lr
self.devices = devices
self.devices = [int(item) for item in devices.split(',')]
ngpu = len(devices)
self.ngpu = ngpu
self.trainlist = trainlist
self.vallist = vallist
self.dataset = dataset
self.datapath = datapath
self.batch_size = batch_size
self.pretrain = pretrain
self.maxdisp = maxdisp
self.criterion = None
self.epe = EPE
self.initialize()
def _prepare_dataset(self):
if self.dataset == 'sceneflow':
train_dataset = SceneFlowDataset(txt_file = self.trainlist, root_dir = self.datapath, phase='train')
test_dataset = SceneFlowDataset(txt_file = self.vallist, root_dir = self.datapath, phase='test')
self.img_height, self.img_width = train_dataset.get_img_size()
self.scale_height, self.scale_width = test_dataset.get_scale_size()
datathread=16
if os.environ.get('datathread') is not None:
datathread = int(os.environ.get('datathread'))
logger.info("Use %d processes to load data..." % datathread)
self.train_loader = DataLoader(train_dataset, batch_size = self.batch_size, \
shuffle = True, num_workers = datathread, \
pin_memory = True)
self.test_loader = DataLoader(test_dataset, batch_size = self.batch_size // 4, \
shuffle = False, num_workers = datathread, \
pin_memory = True)
self.num_batches_per_epoch = len(self.train_loader)
def _build_net(self):
# build net according to the net name
if self.net_name == "psmnet" or self.net_name == "ganet":
self.net = build_net(self.net_name)(self.maxdisp)
else:
self.net = build_net(self.net_name)(batchNorm=False, lastRelu=True, maxdisp=self.maxdisp)
self.is_pretrain = False
if self.ngpu > 1:
self.net = torch.nn.DataParallel(self.net, device_ids=self.devices).cuda()
else:
self.net.cuda()
if self.pretrain == '':
logger.info('Initial a new model...')
else:
if os.path.isfile(self.pretrain):
model_data = torch.load(self.pretrain)
logger.info('Load pretrain model: %s', self.pretrain)
if 'state_dict' in model_data.keys():
self.net.load_state_dict(model_data['state_dict'])
else:
self.net.load_state_dict(model_data)
self.is_pretrain = True
else:
logger.warning('Can not find the specific model %s, initial a new model...', self.pretrain)
def _build_optimizer(self):
beta = 0.999
momentum = 0.9
self.optimizer = torch.optim.Adam(filter(lambda p: p.requires_grad, self.net.parameters()), self.lr,
betas=(momentum, beta), amsgrad=True)
def initialize(self):
self._prepare_dataset()
self._build_net()
self._build_optimizer()
def adjust_learning_rate(self, epoch):
cur_lr = self.lr / (2**(epoch// 10))
for param_group in self.optimizer.param_groups:
param_group['lr'] = cur_lr
self.current_lr = cur_lr
return cur_lr
def set_criterion(self, criterion):
self.criterion = criterion
def train_one_epoch(self, epoch):
batch_time = AverageMeter()
data_time = AverageMeter()
losses = AverageMeter()
flow2_EPEs = AverageMeter()
norm_EPEs = AverageMeter()
angle_EPEs = AverageMeter()
# switch to train mode
self.net.train()
end = time.time()
cur_lr = self.adjust_learning_rate(epoch)
logger.info("learning rate of epoch %d: %f." % (epoch, cur_lr))
for i_batch, sample_batched in enumerate(self.train_loader):
left_input = torch.autograd.Variable(sample_batched['img_left'].cuda(), requires_grad=False)
right_input = torch.autograd.Variable(sample_batched['img_right'].cuda(), requires_grad=False)
input = torch.cat((left_input, right_input), 1)
target_disp = sample_batched['gt_disp']
target_disp = target_disp.cuda()
target_disp = torch.autograd.Variable(target_disp, requires_grad=False)
input_var = torch.autograd.Variable(input, requires_grad=False)
data_time.update(time.time() - end)
self.optimizer.zero_grad()
if self.net_name in ["fadnet", "mobilefadnet"]:
output_net1, output_net2 = self.net(input_var)
loss_net1 = self.criterion(output_net1, target_disp)
loss_net2 = self.criterion(output_net2, target_disp)
loss = loss_net1 + loss_net2
output_net2_final = output_net2[0]
flow2_EPE = self.epe(output_net2_final, target_disp)
elif self.net_name == "dispnetcs":
output_net1, output_net2 = self.net(input_var)
loss_net1 = self.criterion(output_net1, target_disp)
loss_net2 = self.criterion(output_net2, target_disp)
loss = loss_net1 + loss_net2
output_net2_final = output_net2[0]
flow2_EPE = self.epe(output_net2_final, target_disp)
elif self.net_name == "dispnetcss":
output_net1, output_net2, output_net3 = self.net(input_var)
loss_net1 = self.criterion(output_net1, target_disp)
loss_net2 = self.criterion(output_net2, target_disp)
loss_net3 = self.criterion(output_net3, target_disp)
loss = loss_net1 + loss_net2 + loss_net3
output_net3_final = output_net3[0]
flow2_EPE = self.epe(output_net3_final, target_disp)
elif self.net_name == "psmnet" or self.net_name == "ganet":
mask = target_disp < self.maxdisp
mask.detach_()
output1, output2, output3 = self.net(input_var)
output1 = torch.unsqueeze(output1,1)
output2 = torch.unsqueeze(output2,1)
output3 = torch.unsqueeze(output3,1)
loss = 0.5*F.smooth_l1_loss(output1[mask], target_disp[mask], size_average=True) + 0.7*F.smooth_l1_loss(output2[mask], target_disp[mask], size_average=True) + F.smooth_l1_loss(output3[mask], target_disp[mask], size_average=True)
flow2_EPE = self.epe(output3, target_disp)
else:
output = self.net(input_var)
loss = self.criterion(output, target_disp)
if type(loss) is list or type(loss) is tuple:
loss = np.sum(loss)
if type(output) is list or type(output) is tuple:
flow2_EPE = self.epe(output[0], target_disp)
else:
flow2_EPE = self.epe(output, target_disp)
# record loss and EPE
losses.update(loss.data.item(), input_var.size(0))
flow2_EPEs.update(flow2_EPE.data.item(), input_var.size(0))
# compute gradient and do SGD step
loss.backward()
self.optimizer.step()
# measure elapsed time
batch_time.update(time.time() - end)
end = time.time()
if i_batch % 10 == 0:
logger.info('Epoch: [{0}][{1}/{2}]\t'
'Time {batch_time.val:.3f} ({batch_time.avg:.3f})\t'
'Data {data_time.val:.3f} ({data_time.avg:.3f})\t'
'Loss {loss.val:.3f} ({loss.avg:.3f})\t'
'EPE {flow2_EPE.val:.3f} ({flow2_EPE.avg:.3f})\t'.format(
epoch, i_batch, self.num_batches_per_epoch, batch_time=batch_time,
data_time=data_time, loss=losses, flow2_EPE=flow2_EPEs))
return losses.avg, flow2_EPEs.avg
def validate(self):
batch_time = AverageMeter()
flow2_EPEs = AverageMeter()
norm_EPEs = AverageMeter()
angle_EPEs = AverageMeter()
losses = AverageMeter()
# switch to evaluate mode
self.net.eval()
end = time.time()
for i, sample_batched in enumerate(self.test_loader):
left_input = torch.autograd.Variable(sample_batched['img_left'].cuda(), requires_grad=False)
right_input = torch.autograd.Variable(sample_batched['img_right'].cuda(), requires_grad=False)
input = torch.cat((left_input, right_input), 1)
input_var = torch.autograd.Variable(input, requires_grad=False)
target_disp = sample_batched['gt_disp']
target_disp = target_disp.cuda()
target_disp = torch.autograd.Variable(target_disp, requires_grad=False)
if self.net_name == 'fadnet':
output_net1, output_net2 = self.net(input_var)
output_net1 = scale_disp(output_net1, (output_net1.size()[0], 540, 960))
output_net2 = scale_disp(output_net2, (output_net2.size()[0], 540, 960))
loss_net1 = self.epe(output_net1, target_disp)
loss_net2 = self.epe(output_net2, target_disp)
loss = loss_net1 + loss_net2
flow2_EPE = self.epe(output_net2, target_disp)
elif self.net_name == "psmnet" or self.net_name == "ganet":
output_net3 = self.net(input_var)
output_net3 = output_net3.unsqueeze(1)
output_net3 = scale_disp(output_net3, (output_net3.size()[0], 540, 960))
loss = self.epe(output_net3, target_disp)
flow2_EPE = loss
elif self.net_name == 'dispnetcss':
output_net1, output_net2, output_net3 = self.net(input_var)
output_net1 = scale_disp(output_net1, (output_net1.size()[0], 540, 960))
output_net2 = scale_disp(output_net2, (output_net2.size()[0], 540, 960))
output_net3 = scale_disp(output_net3, (output_net3.size()[0], 540, 960))
loss_net1 = self.epe(output_net1, target_disp)
loss_net2 = self.epe(output_net2, target_disp)
loss_net3 = self.epe(output_net3, target_disp)
loss = loss_net1 + loss_net2 + loss_net3
flow2_EPE = self.epe(output_net3, target_disp)
else:
output = self.net(input_var)
output_net1 = output[0]
#output_net1 = output_net1.squeeze(1)
#print(output_net1.size())
output_net1 = scale_disp(output_net1, (output_net1.size()[0], self.img_height, self.img_width))
#output_net1 = torch.from_numpy(output_net1).unsqueeze(1).cuda()
loss = self.epe(output_net1, target_disp)
flow2_EPE = self.epe(output_net1, target_disp)
#if type(loss) is list or type(loss) is tuple:
# loss = loss[0]
#if type(output) is list or type(output_net1) :
# flow2_EPE = self.epe(output[0], target_disp)
#else:
# flow2_EPE = self.epe(output, target_disp)
# record loss and EPE
if loss.data.item() == loss.data.item():
losses.update(loss.data.item(), input_var.size(0))
if flow2_EPE.data.item() == flow2_EPE.data.item():
flow2_EPEs.update(flow2_EPE.data.item(), input_var.size(0))
# measure elapsed time
batch_time.update(time.time() - end)
end = time.time()
if i % 10 == 0:
logger.info('Test: [{0}/{1}]\t Time {2}\t EPE {3}'
.format(i, len(self.test_loader), batch_time.val, flow2_EPEs.val))
logger.info(' * EPE {:.3f}'.format(flow2_EPEs.avg))
return flow2_EPEs.avg
def get_model(self):
return self.net.state_dict()