Awesome

Overview

This repository provides the implementation for the paper "Improved Regularization and Robustness for Fine-tuning in Neural Networks", which will be presented as a poster paper in NeurIPS'21.

In this work, we propose a regularized self-labeling approach that combines regularization and self-training methods for improving the generalization and robustness properties of fine-tuning. Our approach includes two components:

First, we encode layer-wise regularization to penalize the model weights at different layers of the neural net.
Second, we add self-labeling that relabels data points based on current neural net's belief and reweights data points whose confidence is low.

Requirements

To install requirements:

pip install -r requirements.txt

Data Preparation

We use seven image datasets in our paper. We list the link for downloading these datasets and describe how to prepare data to run our code below.

Aircrafts: download and extract into ./data/aircrafts
- remove the class 257.clutter out of the data directory
CUB-200-2011: download and extract into ./data/CUB_200_2011/
Caltech-256: download and extract into ./data/caltech256/
Stanford-Cars: download and extract into ./data/StanfordCars/
Stanford-Dogs: download and extract into ./data/StanfordDogs/
Flowers: download and extract into ./data/flowers/
MIT-Indoor: download and extract into ./data/Indoor/

Our code automatically handles the split of the datasets.

Usage

Our algorithm (RegSL) interpolates between layer-wise regularization and self-labeling. Run the following commands for conducting experiments in this paper.

Fine-tuning ResNet-101 on image classification tasks.

python train_constraint.py --model ResNet101 \
    --config configs/config_constraint_indoor.json \
    --reg_method constraint --reg_norm frob \
    --reg_extractor 0.136809975858091 --reg_predictor 6.40780158171339 --scale_factor 2.52883770643206\
    --device 1

python train_constraint.py --model ResNet101 \
    --config configs/config_constraint_aircrafts.json \
    --reg_method constraint --reg_norm frob \
    --reg_extractor 1.18330556653284 --reg_predictor 5.27713618808711 --scale_factor 1.27679969876201\
    --device 1

python train_constraint.py --model ResNet101 \
    --config configs/config_constraint_birds.json \
    --reg_method constraint --reg_norm frob \
    --reg_extractor 0.204403908747731 --reg_predictor 23.7850606577679 --scale_factor 4.73803591794678\
    --device 1

python train_constraint.py --model ResNet101 \
    --config configs/config_constraint_caltech.json \
    --reg_method constraint --reg_norm frob \
    --reg_extractor 0.0867998872549272 --reg_predictor 9.4552942790218 --scale_factor 1.1785989596144\
    --device 1

python train_constraint.py --model ResNet101 \
    --config configs/config_constraint_cars.json \
    --reg_method constraint --reg_norm frob \
    --reg_extractor 1.3340347414257 --reg_predictor 8.26940794089601 --scale_factor 3.47676759842434\
    --device 1

python train_constraint.py --model ResNet101 \
    --config configs/config_constraint_dogs.json \
    --reg_method constraint --reg_norm frob \
    --reg_extractor 0.0561320847651626 --reg_predictor 4.46281825974388 --scale_factor 1.58722606909531\
    --device 1

python train_constraint.py --model ResNet101 \
    --config configs/config_constraint_flower.json \
    --reg_method constraint --reg_norm frob \
    --reg_extractor 0.131991042311165 --reg_predictor 10.7674132173309 --scale_factor 4.98010215976503\
    --device 1

Fine-tuning ResNet-18 under label noise.

python train_label_noise.py --config configs/config_constraint_indoor.json --model ResNet18 \
    --reg_method constraint --reg_norm frob \
    --reg_extractor 7.80246991703043 --reg_predictor 14.077402847906 \
    --noise_rate 0.2 --train_correct_label --reweight_epoch 5 --reweight_temp 2.0 --correct_epoch 10 --correct_thres 0.9 

python train_label_noise.py --config configs/config_constraint_indoor.json --model ResNet18 \
    --reg_method constraint --reg_norm frob \
    --reg_extractor 8.47139398080791 --reg_predictor 19.0191127114923 \
    --noise_rate 0.4 --train_correct_label --reweight_epoch 5 --reweight_temp 2.0 --correct_epoch 10 --correct_thres 0.9 

python train_label_noise.py --config configs/config_constraint_indoor.json --model ResNet18 \
    --reg_method constraint --reg_norm frob \
    --reg_extractor 10.7576018531961 --reg_predictor 19.8157649727473 \
    --noise_rate 0.6 --train_correct_label --reweight_epoch 5 --reweight_temp 2.0 --correct_epoch 10 --correct_thres 0.9 
    
python train_label_noise.py --config configs/config_constraint_indoor.json --model ResNet18 \
    --reg_method constraint --reg_norm frob \
    --reg_extractor 9.2031662757248 --reg_predictor 6.41568500472423 \
    --noise_rate 0.8 --train_correct_label --reweight_epoch 5 --reweight_temp 1.5 --correct_epoch 10 --correct_thres 0.9

Fine-tuning Vision Transformer on noisy labels.

python train_label_noise.py --config configs/config_constraint_indoor.json \
    --model VisionTransformer --is_vit --img_size 224 --vit_type ViT-B_16 --vit_pretrained_dir pretrained/imagenet21k_ViT-B_16.npz \
    --reg_method none --reg_norm none \
    --lr 0.0001 --device 1 --noise_rate 0.4

python train_label_noise.py --config configs/config_constraint_indoor.json \
    --model VisionTransformer --is_vit --img_size 224 --vit_type ViT-B_16 --vit_pretrained_dir pretrained/imagenet21k_ViT-B_16.npz \
    --reg_method none --reg_norm none \
    --lr 0.0001 --device 1 --noise_rate 0.8

python train_label_noise.py --config configs/config_constraint_indoor.json \
    --model VisionTransformer --is_vit --img_size 224 --vit_type ViT-B_16 --vit_pretrained_dir pretrained/imagenet21k_ViT-B_16.npz \
    --reg_method constraint --reg_norm frob \
    --reg_extractor 0.7488074175044196 --reg_predictor 9.842955837419588 \
    --train_correct_label --reweight_epoch 24 --correct_epoch 18\
    --lr 0.0001 --device 1 --noise_rate 0.4

python train_label_noise.py --config configs/config_constraint_indoor.json \
    --model VisionTransformer --is_vit --img_size 224 --vit_type ViT-B_16 --vit_pretrained_dir pretrained/imagenet21k_ViT-B_16.npz \
    --reg_method constraint --reg_norm frob \
    --reg_extractor 0.1568903647089986 --reg_predictor 1.407080880079702 \
    --train_correct_label --reweight_epoch 18 --correct_epoch 2\
    --lr 0.0001 --device 1 --noise_rate 0.8

Please follow the instructions in ViT-pytorch to download the pre-trained models.

Fine-tuning ResNet-18 on ChestX-ray14 data set.

Run experiments on ChestX-ray14 in reproduce-chexnet path:

cd reproduce-chexnet

python retrain.py --reg_method None --reg_norm None --device 0

python retrain.py --reg_method constraint --reg_norm frob \
    --reg_extractor 5.728564437344309 --reg_predictor 2.5669480884876905 --scale_factor 1.0340072757925474 \
    --device 0

Citation

If you find this repository useful or happen to use it in a research paper, please cite our work with the following bib information.

@article{li2021improved,
  title={Improved Regularization and Robustness for Fine-tuning in Neural Networks},
  author={Li, Dongyue and Zhang, Hongyang},
  journal={Advances in Neural Information Processing Systems},
  volume={34},
  year={2021}
}

Acknowledgment

Thanks to the authors of the following repositories for providing their implementation publicly available.