please help me!!!!!!!!

[electronicYH]

./train/nyu.sh
INFO:main: Loaded Segmenter 50, ImageNet-Pre-Trained=True, #PARAMS=27.34M
/home/amax/anaconda3/lib/python3.6/site-packages/torch/nn/modules/loss.py:216: UserWarning: NLLLoss2d has been deprecated. Please use NLLLoss instead as a drop-in replacement and see https://pytorch.org/docs/master/nn.html#torch.nn.NLLLoss for more details.
warnings.warn("NLLLoss2d has been deprecated. "
INFO:main: Training Process Starts
INFO:main: Created train set = 7736 examples, val set = 48 examples
Traceback (most recent call last):
File "src/train.py", line 425, in
main()
File "src/train.py", line 388, in main
return validate(segmenter, val_loader, 0, num_classes=args.num_classes[task_idx])
File "src/train.py", line 317, in validate
output = segmenter(input_var)
File "/home/amax/anaconda3/lib/python3.6/site-packages/torch/nn/modules/module.py", line 493, in call
result = self.forward(*input, **kwargs)
File "/home/amax/anaconda3/lib/python3.6/site-packages/torch/nn/parallel/data_parallel.py", line 150, in forward
return self.module(*inputs[0], **kwargs[0])
File "/home/amax/anaconda3/lib/python3.6/site-packages/torch/nn/modules/module.py", line 493, in call
result = self.forward(*input, **kwargs)
File "/data/yh/light-weight-refinenet-bak-origin/models/resnet.py", line 222, in forward
x3 = x3 + x4
RuntimeError: The size of tensor a (40) must match the size of tensor b (32) at non-singleton dimension 3

[DrSleep]

what commands did you run and what changes did you make to the code?

[electronicYH]

the command in nyu.sh is :
#!/bin/sh
PYTHONPATH=$(pwd):$PYTHONPATH python src/train.py
--enc 50 #--evaluate true

and the train.py is :
"""RefineNet-LightWeight

RefineNet-LigthWeight PyTorch for non-commercial purposes

Copyright (c) 2018, Vladimir Nekrasov (vladimir.nekrasov@adelaide.edu.au)
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

• Redistributions of source code must retain the above copyright notice, this
  list of conditions and the following disclaimer.

• Redistributions in binary form must reproduce the above copyright notice,
  this list of conditions and the following disclaimer in the documentation
  and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""

general libs

import argparse
import logging
import os
import random
import re
import sys
import time

misc

import cv2
import numpy as np

pytorch libs

import torch
import torch.nn as nn

custom libs

from config import *
from miou_utils import compute_iu, fast_cm
from util import *

def get_arguments():
"""Parse all the arguments provided from the CLI.

Returns:
  A list of parsed arguments.
"""
parser = argparse.ArgumentParser(description="Full Pipeline Training")

# Dataset
parser.add_argument("--train-dir", type=str, default=TRAIN_DIR,
                    help="Path to the training set directory.")
parser.add_argument("--val-dir", type=str, default=VAL_DIR,
                    help="Path to the validation set directory.")
parser.add_argument("--train-list", type=str, nargs='+', default=TRAIN_LIST,
                    help="Path to the training set list.")
parser.add_argument("--val-list", type=str, nargs='+', default=VAL_LIST,
                    help="Path to the validation set list.")
parser.add_argument("--shorter-side", type=int, nargs='+', default=SHORTER_SIDE,
                    help="Shorter side transformation.")
parser.add_argument("--crop-size", type=int, nargs='+', default=CROP_SIZE,
                    help="Crop size for training,")
parser.add_argument("--normalise-params", type=list, default=NORMALISE_PARAMS,
                    help="Normalisation parameters [scale, mean, std],")
parser.add_argument("--batch-size", type=int, nargs='+', default=BATCH_SIZE,
                    help="Batch size to train the segmenter model.")
parser.add_argument("--num-workers", type=int, default=NUM_WORKERS,
                    help="Number of workers for pytorch's dataloader.")
parser.add_argument("--num-classes", type=int, nargs='+', default=NUM_CLASSES,
                    help="Number of output classes for each task.")
parser.add_argument("--low-scale", type=float, nargs='+', default=LOW_SCALE,
                    help="Lower bound for random scale")
parser.add_argument("--high-scale", type=float, nargs='+', default=HIGH_SCALE,
                    help="Upper bound for random scale")
parser.add_argument("--ignore-label", type=int, default=IGNORE_LABEL,
                    help="Label to ignore during training")

# Encoder
parser.add_argument("--enc", type=str, default=ENC,
                    help="Encoder net type.")
parser.add_argument("--enc-pretrained", type=bool, default=ENC_PRETRAINED,
                    help='Whether to init with imagenet weights.')
# General
parser.add_argument("--evaluate", type=bool, default=EVALUATE,
                    help='If true, only validate segmentation.')
parser.add_argument("--freeze-bn", type=bool, nargs='+', default=FREEZE_BN,
                    help='Whether to keep batch norm statistics intact.')
parser.add_argument("--num-segm-epochs", type=int, nargs='+', default=NUM_SEGM_EPOCHS,
                    help='Number of epochs to train for segmentation network.')
parser.add_argument("--print-every", type=int, default=PRINT_EVERY,
                    help='Print information every often.')
parser.add_argument("--random-seed", type=int, default=RANDOM_SEED,
                    help='Seed to provide (near-)reproducibility.')
parser.add_argument("--snapshot-dir", type=str, default=SNAPSHOT_DIR,
                    help="Path to directory for storing checkpoints.")
parser.add_argument("--ckpt-path", type=str, default=CKPT_PATH,
                    help="Path to the checkpoint file.")
parser.add_argument("--val-every", nargs='+', type=int, default=VAL_EVERY,
                    help="How often to validate current architecture.")

# Optimisers
parser.add_argument("--lr-enc", type=float, nargs='+', default=LR_ENC,
                    help="Learning rate for encoder.")
parser.add_argument("--lr-dec", type=float, nargs='+', default=LR_DEC,
                    help="Learning rate for decoder.")
parser.add_argument("--mom-enc", type=float, nargs='+', default=MOM_ENC,
                    help="Momentum for encoder.")
parser.add_argument("--mom-dec", type=float, nargs='+', default=MOM_DEC,
                    help="Momentum for decoder.")
parser.add_argument("--wd-enc", type=float, nargs='+', default=WD_ENC,
                    help="Weight decay for encoder.")
parser.add_argument("--wd-dec", type=float, nargs='+', default=WD_DEC,
                    help="Weight decay for decoder.")
parser.add_argument("--optim-dec", type=str, default=OPTIM_DEC,
                    help="Optimiser algorithm for decoder.")
return parser.parse_args()

def create_segmenter(
net, pretrained, num_classes
):
"""Create Encoder; for now only ResNet [50,101,152]"""
from models.resnet import rf_lw50, rf_lw101, rf_lw152
if str(net) == '50':
return rf_lw50(num_classes, imagenet=pretrained)
elif str(net) == '101':
return rf_lw101(num_classes, imagenet=pretrained)
elif str(net) == '152':
return rf_lw152(num_classes, imagenet=pretrained)
else:
raise ValueError("{} is not supported".format(str(net)))

def create_loaders(
train_dir, val_dir, train_list, val_list,
shorter_side, crop_size, low_scale, high_scale,
normalise_params, batch_size, num_workers, ignore_label
):
"""
Args:
train_dir (str) : path to the root directory of the training set.
val_dir (str) : path to the root directory of the validation set.
train_list (str) : path to the training list.
val_list (str) : path to the validation list.
shorter_side (int) : parameter of the shorter_side resize transformation.
crop_size (int) : square crop to apply during the training.
low_scale (float) : lowest scale ratio for augmentations.
high_scale (float) : highest scale ratio for augmentations.
normalise_params (list / tuple) : img_scale, img_mean, img_std.
batch_size (int) : training batch size.
num_workers (int) : number of workers to parallelise data loading operations.
ignore_label (int) : label to pad segmentation masks with

Returns:
  train_loader, val loader

"""
# Torch libraries
from torchvision import transforms
from torch.utils.data import DataLoader, random_split
# Custom libraries
from datasets import NYUDataset as Dataset
from datasets import Pad, RandomCrop, RandomMirror, ResizeShorterScale, ToTensor, Normalise

## Transformations during training ##
composed_trn = transforms.Compose([#ResizeShorterScale(shorter_side, low_scale, high_scale),
                                #Pad(crop_size, [105.57, 104.295 , 107.61], ignore_label),
                                #RandomMirror(),
                                #RandomCrop(crop_size),
                                Normalise(*normalise_params),
                                ToTensor()])
                                #Pad(crop_size, [105.57, 104.295 , 107.61], ignore_label),

composed_val = transforms.Compose([Normalise(*normalise_params),
                                ToTensor()])
## Training and validation sets ##
trainset = Dataset(data_file=train_list,
                   data_dir=train_dir,
                   transform_trn=composed_trn,
                   transform_val=composed_val)

valset = Dataset(data_file=val_list,
                     data_dir=val_dir,
                     transform_trn=None,
                     transform_val=composed_val)
logger.info(" Created train set = {} examples, val set = {} examples"
            .format(len(trainset), len(valset)))
## Training and validation loaders ##
train_loader = DataLoader(trainset,
                          batch_size=batch_size,
                          shuffle=True,
                          num_workers=num_workers,
                          pin_memory=True,
                          drop_last=True)
val_loader = DataLoader(valset,
                        batch_size=1,
                        shuffle=False,
                        num_workers=num_workers,
                        pin_memory=True)
return train_loader, val_loader

def create_optimisers(
lr_enc, lr_dec,
mom_enc, mom_dec,
wd_enc, wd_dec,
param_enc, param_dec,
optim_dec
):
"""Create optimisers for encoder, decoder and controller"""
optim_enc = torch.optim.SGD(param_enc, lr=lr_enc, momentum=mom_enc,
weight_decay=wd_enc)
if optim_dec == 'sgd':
optim_dec = torch.optim.SGD(param_dec, lr=lr_dec,
momentum=mom_dec, weight_decay=wd_dec)
elif optim_dec == 'adam':
optim_dec = torch.optim.Adam(param_dec, lr=lr_dec, weight_decay=wd_dec, eps=1e-3)
return optim_enc, optim_dec

def load_ckpt(
ckpt_path, ckpt_dict
):
best_val = epoch_start = 0
if os.path.exists(args.ckpt_path):
ckpt = torch.load(ckpt_path)
for (k, v) in ckpt_dict.items():
if k in ckpt:
v.load_state_dict(ckpt[k])
best_val = ckpt.get('best_val', 0)
epoch_start = ckpt.get('epoch_start', 0)
logger.info(" Found checkpoint at {} with best_val {:.4f} at epoch {}".
format(
ckpt_path, best_val, epoch_start
))
return best_val, epoch_start

def train_segmenter(
segmenter, train_loader, optim_enc, optim_dec,
epoch, segm_crit, freeze_bn
):
"""Training segmenter

Args:
  segmenter (nn.Module) : segmentation network
  train_loader (DataLoader) : training data iterator
  optim_enc (optim) : optimiser for encoder
  optim_dec (optim) : optimiser for decoder
  epoch (int) : current epoch
  segm_crit (nn.Loss) : segmentation criterion
  freeze_bn (bool) : whether to keep BN params intact

"""
train_loader.dataset.set_stage('train')
segmenter.train()
if freeze_bn:
    for m in segmenter.modules():
        if isinstance(m, nn.BatchNorm2d):
            m.eval()
batch_time = AverageMeter()
losses = AverageMeter()
for i, sample in enumerate(train_loader):
    start = time.time()
    input = sample['image'].cuda()
    target = sample['mask'].cuda()
    input_var = torch.autograd.Variable(input).float()
    target_var = torch.autograd.Variable(target).long()
    # Compute output
    output = segmenter(input_var)
    output = nn.functional.interpolate(output, size=target_var.size()[1:], mode='bilinear', align_corners=False)
    soft_output = nn.LogSoftmax()(output)
    # Compute loss and backpropagate
    loss = segm_crit(soft_output, target_var)
    optim_enc.zero_grad()
    optim_dec.zero_grad()
    loss.backward()
    optim_enc.step()
    optim_dec.step()
    losses.update(loss.item())
    batch_time.update(time.time() - start)
    if i % args.print_every == 0:
        logger.info(' Train epoch: {} [{}/{}]\t'
                    'Avg. Loss: {:.3f}\t'
                    'Avg. Time: {:.3f}'.format(
                        epoch, i, len(train_loader),
                        losses.avg, batch_time.avg
                    ))

def validate(
segmenter, val_loader, epoch, num_classes=-1
):
"""Validate segmenter

Args:
  segmenter (nn.Module) : segmentation network
  val_loader (DataLoader) : training data iterator
  epoch (int) : current epoch
  num_classes (int) : number of classes to consider

Returns:
  Mean IoU (float)
"""
val_loader.dataset.set_stage('val')
segmenter.eval()
cm = np.zeros((num_classes, num_classes), dtype=int)
with torch.no_grad():
    for i, sample in enumerate(val_loader):
        start = time.time()
        input = sample['image']
        target = sample['mask']
        input_var = torch.autograd.Variable(input).float().cuda()
        # Compute output
        output = segmenter(input_var)
        output = cv2.resize(output[0, :num_classes].data.cpu().numpy().transpose(1, 2, 0),
                            target.size()[1:][::-1],
                            interpolation=cv2.INTER_CUBIC).argmax(axis=2).astype(np.uint8)
        
        #cv2.imshow('output',50*output)
        #cv2.waitKey()
        cv2.imwrite(str(i)+'.jpg',output)
        # Compute IoU
        gt = target[0].data.cpu().numpy().astype(np.uint8)
        gt_idx = gt < num_classes # Ignore every class index larger than the number of classes
        cm += fast_cm(output[gt_idx], gt[gt_idx], num_classes)

        if i % args.print_every == 0:
            logger.info(' Val epoch: {} [{}/{}]\t'
                        'Mean IoU: {:.3f}'.format(
                            epoch, i, len(val_loader),
                            compute_iu(cm).mean()
                        ))

ious = compute_iu(cm)
logger.info(" IoUs: {}".format(ious))
miou = np.mean(ious)
logger.info(' Val epoch: {}\tMean IoU: {:.3f}'.format(
                            epoch, miou))
return miou

def main():
global args, logger
args = get_arguments()
logger = logging.getLogger(name)
## Add args ##
args.num_stages = len(args.num_classes)
## Set random seeds ##
torch.backends.cudnn.deterministic = True
torch.manual_seed(args.random_seed)
if torch.cuda.is_available():
torch.cuda.manual_seed_all(args.random_seed)
np.random.seed(args.random_seed)
random.seed(args.random_seed)
## Generate Segmenter ##
segmenter = nn.DataParallel(
create_segmenter(args.enc, args.enc_pretrained, args.num_classes[0])
).cuda()
logger.info(" Loaded Segmenter {}, ImageNet-Pre-Trained={}, #PARAMS={:3.2f}M"
.format(args.enc, args.enc_pretrained, compute_params(segmenter) / 1e6))
## Restore if any ##
best_val, epoch_start = load_ckpt(args.ckpt_path, {'segmenter' : segmenter})
## Criterion ##
segm_crit = nn.NLLLoss2d(ignore_index=args.ignore_label).cuda()

## Saver ##
saver = Saver(args=vars(args),
              ckpt_dir=args.snapshot_dir,
              best_val=best_val,
              condition=lambda x, y: x > y)  # keep checkpoint with the best validation score

logger.info(" Training Process Starts")
for task_idx in range(args.num_stages):
    start = time.time()
    torch.cuda.empty_cache()
    ## Create dataloaders ##
    train_loader, val_loader = create_loaders(args.train_dir,
                                              args.val_dir,
                                              args.train_list[task_idx],
                                              args.val_list[task_idx],
                                              args.shorter_side[task_idx],
                                              args.crop_size[task_idx],
                                              args.low_scale[task_idx],
                                              args.high_scale[task_idx],
                                              args.normalise_params,
                                              args.batch_size[task_idx],
                                              args.num_workers,
                                              args.ignore_label)
    if args.evaluate:
        return validate(segmenter, val_loader, 0, num_classes=args.num_classes[task_idx])

    logger.info(" Training Stage {}".format(str(task_idx)))
    ## Optimisers ##
    enc_params = []
    dec_params = []
    for k,v in segmenter.named_parameters():
        if bool(re.match(".*conv1.*|.*bn1.*|.*layer.*", k)):
            enc_params.append(v)
            logger.info(" Enc. parameter: {}".format(k))
        else:
            dec_params.append(v)
            logger.info(" Dec. parameter: {}".format(k))
    optim_enc, optim_dec = create_optimisers(args.lr_enc[task_idx], args.lr_dec[task_idx],
                                             args.mom_enc[task_idx], args.mom_dec[task_idx],
                                             args.wd_enc[task_idx], args.wd_dec[task_idx],
                                             enc_params, dec_params, args.optim_dec)
    for epoch in range(args.num_segm_epochs[task_idx]):
        train_segmenter(segmenter, train_loader,
                        optim_enc, optim_dec,
                        epoch_start, segm_crit,
                        args.freeze_bn[task_idx])
        if (epoch + 1) % (args.val_every[task_idx]) == 0:
            miou = validate(segmenter, val_loader, epoch_start, args.num_classes[task_idx])
            saver.save(
                miou,
                {'segmenter' : segmenter.state_dict(),
                 'epoch_start' : epoch_start}, logger
                 )
        epoch_start += 1
    logger.info("Stage {} finished, time spent {:.3f}min".format(
        task_idx, (time.time() - start) / 60.))
logger.info("All stages are now finished. Best Val is {:.3f}".format(
    saver.best_val))

if name == 'main':
logging.basicConfig(level=logging.INFO)
main()