#-*-coding:utf-8-*- # date:2020-04-24 # Author: Eric.Lee ## function: train import os import argparse import torch import torch.nn as nn import torch.optim as optim import sys from utils.model_utils import * from utils.common_utils import * from data_iter.datasets import * from models.resnet import resnet50 from loss.loss import * import cv2 import time from datetime import datetime def trainer(ops,f_log): try: os.environ['CUDA_VISIBLE_DEVICES'] = ops.GPUS if ops.log_flag: sys.stdout = f_log set_seed(ops.seed) #---------------------------------------------------------------- 构建模型 print('use model : %s'%(ops.model)) if ops.model == 'resnet_50': model_ = resnet50(pretrained = ops.pretrained,num_classes = ops.num_classes,img_size = ops.img_size[0],dropout_factor=ops.dropout) elif ops.model == 'resnet_34': model_ = resnet34(pretrained = ops.pretrained,num_classes = ops.num_classes,img_size = ops.img_size[0],dropout_factor=ops.dropout) use_cuda = torch.cuda.is_available() device = torch.device("cuda:0" if use_cuda else "cpu") model_ = model_.to(device) # print(model_)# 打印模型结构 # Dataset dataset = LoadImagesAndLabels(ops= ops,img_size=ops.img_size,flag_agu=ops.flag_agu,fix_res = ops.fix_res,vis = False) print("wflw done") print('len train datasets : %s'%(dataset.__len__())) # Dataloader dataloader = DataLoader(dataset, batch_size=ops.batch_size, num_workers=ops.num_workers, shuffle=True, pin_memory=False, drop_last = True) # 优化器设计 optimizer_SGD = optim.SGD(model_.parameters(), lr=ops.init_lr, momentum=ops.momentum, weight_decay=ops.weight_decay)# 优化器初始化 optimizer = optimizer_SGD # 加载 finetune 模型 if os.access(ops.fintune_model,os.F_OK):# checkpoint chkpt = torch.load(ops.fintune_model, map_location=device) model_.load_state_dict(chkpt) print('load fintune model : {}'.format(ops.fintune_model)) print('/**********************************************/') # 损失函数 if ops.loss_define != 'wing_loss': criterion = nn.MSELoss(reduce=True, reduction='mean') step = 0 idx = 0 # 变量初始化 best_loss = np.inf loss_mean = 0. # 损失均值 loss_idx = 0. # 损失计算计数器 flag_change_lr_cnt = 0 # 学习率更新计数器 init_lr = ops.init_lr # 学习率 epochs_loss_dict = {} for epoch in range(0, ops.epochs): if ops.log_flag: sys.stdout = f_log print('\nepoch %d ------>>>'%epoch) model_.train() # 学习率更新策略 if loss_mean!=0.: if best_loss > (loss_mean/loss_idx): flag_change_lr_cnt = 0 best_loss = (loss_mean/loss_idx) else: flag_change_lr_cnt += 1 if flag_change_lr_cnt > 20: init_lr = init_lr*ops.lr_decay set_learning_rate(optimizer, init_lr) flag_change_lr_cnt = 0 loss_mean = 0. # 损失均值 loss_idx = 0. # 损失计算计数器 for i, (imgs_, pts_) in enumerate(dataloader): # print('imgs_, pts_',imgs_.size(), pts_.size()) if use_cuda: imgs_ = imgs_.cuda() # pytorch 的 数据输入格式 ： (batch, channel, height, width) pts_ = pts_.cuda() output = model_(imgs_.float()) if ops.loss_define == 'wing_loss': # 可以针对人脸部分的效果调损失权重，注意 关键点 id 映射关系 *2 ，因为涉及坐标（x，y） loss = got_total_wing_loss(output, pts_.float()) loss_eye_center = got_total_wing_loss(output[:,192:196], pts_[:,192:196].float())*0.06 loss_eye = got_total_wing_loss(output[:,120:152], pts_[:,120:152].float())*0.15 loss_nose = got_total_wing_loss(output[:,102:120], pts_[:,102:120].float())*0.08 loss += loss_eye_center + loss_eye + loss_nose else: loss = criterion(output, pts_.float()) loss_mean += loss.item() loss_idx += 1. if i%10 == 0: loc_time = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()) print(' %s - %s - epoch [%s/%s] (%s/%s):'%(loc_time,ops.model,epoch,ops.epochs,i,int(dataset.__len__()/ops.batch_size)),\ 'Mean Loss : %.6f - Loss: %.6f'%(loss_mean/loss_idx,loss.item()),\ ' lr : %.7f'%init_lr,' bs :',ops.batch_size,\ ' img_size: %s x %s'%(ops.img_size[0],ops.img_size[1]),' best_loss: %.6f'%best_loss) # 计算梯度 loss.backward() # 优化器对模型参数更新 optimizer.step() # 优化器梯度清零 optimizer.zero_grad() step += 1 if epoch % 5 == 0 and epoch >0: torch.save(model_.state_dict(), ops.model_exp + '{}-epoch-{}.pth'.format(ops.model,epoch)) except Exception as e: print('Exception : ',e) # 打印异常 print('Exception file : ', e.__traceback__.tb_frame.f_globals['__file__'])# 发生异常所在的文件 print('Exception line : ', e.__traceback__.tb_lineno)# 发生异常所在的行数 if __name__ == "__main__": parser = argparse.ArgumentParser(description=' Project facial landmarks Train') parser.add_argument('--seed', type=int, default = 32, help = 'seed') # 设置随机种子 parser.add_argument('--model_exp', type=str, default = './model_exp', help = 'model_exp') # 模型输出文件夹 parser.add_argument('--model', type=str, default = 'resnet_50', help = 'model : resnet_50,resnet_34') # 模型类型 parser.add_argument('--num_classes', type=int , default = 196, help = 'num_classes') # landmarks 个数*2 parser.add_argument('--GPUS', type=str, default = '0', help = 'GPUS') # GPU选择 parser.add_argument('--images_path', type=str, default = './datasets/WFLW_images/', help = 'images_path') # 图片路径 parser.add_argument('--train_list', type=str, default = './datasets/WFLW_annotations/list_98pt_rect_attr_train_test/list_98pt_rect_attr_train.txt', help = 'annotations_train_list')# 训练集标注信息 parser.add_argument('--pretrained', type=bool, default = True, help = 'imageNet_Pretrain') # 初始化学习率 parser.add_argument('--fintune_model', type=str, default = './model_exp/2021-02-21_17-51-30/resnet_50-epoch-724.pth', help = 'fintune_model') # fintune model parser.add_argument('--loss_define', type=str, default = 'wing_loss', help = 'define_loss') # 损失函数定义 parser.add_argument('--init_lr', type=float, default = 1e-3, help = 'init_learningRate') # 初始化学习率 parser.add_argument('--lr_decay', type=float, default = 0.1, help = 'learningRate_decay') # 学习率权重衰减率 parser.add_argument('--weight_decay', type=float, default = 5e-6, help = 'weight_decay') # 优化器正则损失权重 parser.add_argument('--momentum', type=float, default = 0.9, help = 'momentum') # 优化器动量 parser.add_argument('--batch_size', type=int, default = 16, help = 'batch_size') # 训练每批次图像数量 parser.add_argument('--dropout', type=float, default = 0.5, help = 'dropout') # dropout parser.add_argument('--epochs', type=int, default = 1000, help = 'epochs') # 训练周期 parser.add_argument('--num_workers', type=int, default = 8, help = 'num_workers') # 训练数据生成器线程数 parser.add_argument('--img_size', type=tuple , default = (256,256), help = 'img_size') # 输入模型图片尺寸 parser.add_argument('--flag_agu', type=bool , default = True, help = 'data_augmentation') # 训练数据生成器是否进行数据扩增 parser.add_argument('--fix_res', type=bool , default = False, help = 'fix_resolution') # 输入模型样本图片是否保证图像分辨率的长宽比 parser.add_argument('--clear_model_exp', type=bool, default = False, help = 'clear_model_exp') # 模型输出文件夹是否进行清除 parser.add_argument('--log_flag', type=bool, default = False, help = 'log flag') # 是否保存训练 log #-------------------------------------------------------------------------- args = parser.parse_args()# 解析添加参数 #-------------------------------------------------------------------------- mkdir_(args.model_exp, flag_rm=args.clear_model_exp) loc_time = time.localtime() args.model_exp = args.model_exp + '/' + time.strftime("%Y-%m-%d_%H-%M-%S", loc_time)+'/' mkdir_(args.model_exp, flag_rm=args.clear_model_exp) f_log = None if args.log_flag: f_log = open(args.model_exp+'/train_{}.log'.format(time.strftime("%Y-%m-%d_%H-%M-%S",loc_time)), 'a+') sys.stdout = f_log print('---------------------------------- log : {}'.format(time.strftime("%Y-%m-%d %H:%M:%S", loc_time))) print('\n/******************* {} ******************/\n'.format(parser.description)) unparsed = vars(args) # parse_args()方法的返回值为namespace，用vars()内建函数化为字典 for key in unparsed.keys(): print('{} : {}'.format(key,unparsed[key])) unparsed['time'] = time.strftime("%Y-%m-%d %H:%M:%S", loc_time) trainer(ops = args,f_log = f_log)# 模型训练 if args.log_flag: sys.stdout = f_log print('well done : {}'.format(time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())))