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trainer.py
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trainer.py
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import numpy as np
import torch
from torch import optim
from torch.autograd import Variable
from torch.optim.lr_scheduler import StepLR
from models.CC import CrowdCounter
from config import cfg
from misc.utils import *
import pdb
class Trainer():
def __init__(self, dataloader, cfg_data, pwd):
self.cfg_data = cfg_data
self.data_mode = cfg.DATASET
self.exp_name = cfg.EXP_NAME
self.exp_path = cfg.EXP_PATH
self.pwd = pwd
self.net_name = cfg.NET
self.net = CrowdCounter(cfg.GPU_ID,self.net_name,cfg.DCL_CONF).cuda()
self.optimizer = optim.Adam(self.net.CCN.parameters(), lr=cfg.LR, weight_decay=1e-4)
# self.optimizer = optim.SGD(self.net.parameters(), cfg.LR, momentum=0.95,weight_decay=5e-4)
self.scheduler = StepLR(self.optimizer, step_size=cfg.NUM_EPOCH_LR_DECAY, gamma=cfg.LR_DECAY)
self.train_record = {'best_mae': 1e20, 'best_mse':1e20, 'best_model_name': ''}
self.timer = {'iter time' : Timer(),'train time' : Timer(),'val time' : Timer()}
self.writer, self.log_txt = logger(self.exp_path, self.exp_name, self.pwd, 'exp')
self.i_tb = 0
self.epoch = -1
if cfg.PRE_GCC_MODEL !='':
self.net.load_state_dict(torch.load(cfg.PRE_GCC_MODEL))
self.train_loader, self.val_loader, self.restore_transform = dataloader()
def forward(self):
# self.validate_V3()
for epoch in range(cfg.MAX_EPOCH):
self.epoch = epoch
if epoch > cfg.LR_DECAY_START:
self.scheduler.step()
# training
self.timer['train time'].tic()
self.train()
self.timer['train time'].toc(average=False)
print 'train time: {:.2f}s'.format(self.timer['train time'].diff)
print '='*20
# validation
if epoch%cfg.VAL_FREQ==0 or epoch>cfg.VAL_DENSE_START:
self.timer['val time'].tic()
if self.data_mode in ['SHHA', 'SHHB', 'QNRF', 'UCF50']:
self.validate_V1()
elif self.data_mode is 'WE':
self.validate_V2()
elif self.data_mode is 'GCC':
self.validate_V3()
self.timer['val time'].toc(average=False)
print 'val time: {:.2f}s'.format(self.timer['val time'].diff)
def train(self): # training for all datasets
self.net.train()
ageAtom = 1.0 / len(self.train_loader)
for i, data in enumerate(self.train_loader, 0):
self.net.updateAge(ageAtom)
self.timer['iter time'].tic()
img, gt_map = data
img = Variable(img).cuda()
gt_map = Variable(gt_map).cuda()
self.optimizer.zero_grad()
pred_map = self.net(img, gt_map, train=True)
loss = self.net.loss
loss.backward()
self.optimizer.step()
if (i + 1) % cfg.PRINT_FREQ == 0:
self.i_tb += 1
self.writer.add_scalar('train_loss', loss.item(), self.i_tb)
self.timer['iter time'].toc(average=False)
print '[ep %d][it %d][loss %.4f][lr %.4f][%.2fs]' % \
(self.epoch + 1, i + 1, loss.item(), self.optimizer.param_groups[0]['lr']*10000, self.timer['iter time'].diff)
print ' [cnt: gt: %.1f pred: %.2f]' % (gt_map[0].sum().data/self.cfg_data.LOG_PARA, pred_map[0].sum().data/self.cfg_data.LOG_PARA)
def validate_V1(self):# validate_V1 for SHHA, SHHB, UCF-QNRF, UCF50
self.net.eval()
losses = AverageMeter()
maes = AverageMeter()
mses = AverageMeter()
for vi, data in enumerate(self.val_loader, 0):
img, gt_map = data
with torch.no_grad():
img = Variable(img).cuda()
gt_map = Variable(gt_map).cuda()
pred_map = self.net.forward(img,gt_map)
pred_map = pred_map.data.cpu().numpy()
gt_map = gt_map.data.cpu().numpy()
for i_img in range(pred_map.shape[0]):
pred_cnt = np.sum(pred_map[i_img])/self.cfg_data.LOG_PARA
gt_count = np.sum(gt_map[i_img])/self.cfg_data.LOG_PARA
losses.update(self.net.loss.item())
maes.update(abs(gt_count-pred_cnt))
mses.update((gt_count-pred_cnt)*(gt_count-pred_cnt))
if vi==0:
vis_results(self.exp_name, self.epoch, self.writer, self.restore_transform, img, pred_map, gt_map)
mae = maes.avg
mse = np.sqrt(mses.avg)
loss = losses.avg
self.writer.add_scalar('val_loss', loss, self.epoch + 1)
self.writer.add_scalar('mae', mae, self.epoch + 1)
self.writer.add_scalar('mse', mse, self.epoch + 1)
self.train_record = update_model(self.net,self.epoch,self.exp_path,self.exp_name,[mae, mse, loss],self.train_record,self.log_txt)
print_summary(self.exp_name,[mae, mse, loss],self.train_record)
def validate_V2(self):# validate_V2 for WE
self.net.eval()
losses = AverageCategoryMeter(5)
maes = AverageCategoryMeter(5)
roi_mask = []
from datasets.WE.setting import cfg_data
from scipy import io as sio
for val_folder in cfg_data.VAL_FOLDER:
roi_mask.append(sio.loadmat(os.path.join(cfg_data.DATA_PATH,'test',val_folder + '_roi.mat'))['BW'])
for i_sub,i_loader in enumerate(self.val_loader,0):
mask = roi_mask[i_sub]
for vi, data in enumerate(i_loader, 0):
img, gt_map = data
with torch.no_grad():
img = Variable(img).cuda()
gt_map = Variable(gt_map).cuda()
pred_map = self.net.forward(img,gt_map)
pred_map = pred_map.data.cpu().numpy()
gt_map = gt_map.data.cpu().numpy()
for i_img in range(pred_map.shape[0]):
pred_cnt = np.sum(pred_map[i_img])/self.cfg_data.LOG_PARA
gt_count = np.sum(gt_map[i_img])/self.cfg_data.LOG_PARA
losses.update(self.net.loss.item(),i_sub)
maes.update(abs(gt_count-pred_cnt),i_sub)
if vi==0:
vis_results(self.exp_name, self.epoch, self.writer, self.restore_transform, img, pred_map, gt_map)
mae = np.average(maes.avg)
loss = np.average(losses.avg)
self.writer.add_scalar('val_loss', loss, self.epoch + 1)
self.writer.add_scalar('mae', mae, self.epoch + 1)
self.writer.add_scalar('mae_s1', maes.avg[0], self.epoch + 1)
self.writer.add_scalar('mae_s2', maes.avg[1], self.epoch + 1)
self.writer.add_scalar('mae_s3', maes.avg[2], self.epoch + 1)
self.writer.add_scalar('mae_s4', maes.avg[3], self.epoch + 1)
self.writer.add_scalar('mae_s5', maes.avg[4], self.epoch + 1)
self.train_record = update_model(self.net,self.epoch,self.exp_path,self.exp_name,[mae, 0, loss],self.train_record,self.log_txt)
print_WE_summary(self.log_txt,self.epoch,[mae, 0, loss],self.train_record,maes)
def validate_V3(self):# validate_V3 for GCC
self.net.eval()
losses = AverageMeter()
maes = AverageMeter()
mses = AverageMeter()
c_maes = {'level':AverageCategoryMeter(9), 'time':AverageCategoryMeter(8),'weather':AverageCategoryMeter(7)}
c_mses = {'level':AverageCategoryMeter(9), 'time':AverageCategoryMeter(8),'weather':AverageCategoryMeter(7)}
for vi, data in enumerate(self.val_loader, 0):
img, gt_map, attributes_pt = data
with torch.no_grad():
img = Variable(img).cuda()
gt_map = Variable(gt_map).cuda()
pred_map = self.net.forward(img,gt_map)
pred_map = pred_map.data.cpu().numpy()
gt_map = gt_map.data.cpu().numpy()
for i_img in range(pred_map.shape[0]):
pred_cnt = np.sum(pred_map[i_img])/self.cfg_data.LOG_PARA
gt_count = np.sum(gt_map[i_img])/self.cfg_data.LOG_PARA
s_mae = abs(gt_count-pred_cnt)
s_mse = (gt_count-pred_cnt)*(gt_count-pred_cnt)
losses.update(self.net.loss.item())
maes.update(s_mae)
mses.update(s_mse)
attributes_pt = attributes_pt.squeeze()
c_maes['level'].update(s_mae,attributes_pt[i_img][0])
c_mses['level'].update(s_mse,attributes_pt[i_img][0])
c_maes['time'].update(s_mae,attributes_pt[i_img][1]/3)
c_mses['time'].update(s_mse,attributes_pt[i_img][1]/3)
c_maes['weather'].update(s_mae,attributes_pt[i_img][2])
c_mses['weather'].update(s_mse,attributes_pt[i_img][2])
if vi==0:
vis_results(self.exp_name, self.epoch, self.writer, self.restore_transform, img, pred_map, gt_map)
loss = losses.avg
mae = maes.avg
mse = np.sqrt(mses.avg)
self.writer.add_scalar('val_loss', loss, self.epoch + 1)
self.writer.add_scalar('mae', mae, self.epoch + 1)
self.writer.add_scalar('mse', mse, self.epoch + 1)
self.train_record = update_model(self.net,self.epoch,self.exp_path,self.exp_name,[mae, mse, loss],self.train_record)
print_GCC_summary(self.log_txt,self.epoch,[mae, mse, loss],self.train_record,c_maes,c_mses)