amazon-science/crossnorm-selfnorm amazon-science/crossnorm-selfnorm

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Repository Details

CrossNorm and SelfNorm for Generalization under Distribution Shifts, ICCV 2021

CrossNorm (CN) and SelfNorm (SN) (Accepted at ICCV 2021)

This is the official PyTorch implementation of our CNSN paper, in which we propose CrossNorm (CN) and SelfNorm (SN), two simple, effective, and complementary normalization techniques to improve generalization robustness under distribution shifts. 

@article{tang2021cnsn,
  title={CrossNorm and SelfNorm for Generalization under Distribution Shifts},
  author={Zhiqiang Tang, Yunhe Gao, Yi Zhu, Zhi Zhang, Mu Li, Dimitris Metaxas},
  journal={arXiv preprint arXiv:2102.02811},
  year={2021}
}

Install dependencies

conda create --name cnsn python=3.7
conda activate cnsn
conda install numpy
conda install pytorch==1.2.0 torchvision==0.4.0 cudatoolkit=10.0 -c pytorch

Prepare datasets

  • Download CIFAR-10-C and CIFAR-100-C datasets with:

    mkdir -p ./data
curl -O https://zenodo.org/record/2535967/files/CIFAR-10-C.tar
curl -O https://zenodo.org/record/3555552/files/CIFAR-100-C.tar
tar -xvf CIFAR-100-C.tar -C data/
tar -xvf CIFAR-10-C.tar -C data/

  • Download ImageNet-C with:

    mkdir -p ./data/ImageNet-C
curl -O https://zenodo.org/record/2235448/files/blur.tar
curl -O https://zenodo.org/record/2235448/files/digital.tar
curl -O https://zenodo.org/record/2235448/files/noise.tar
curl -O https://zenodo.org/record/2235448/files/weather.tar
tar -xvf blur.tar -C data/ImageNet-C
tar -xvf digital.tar -C data/ImageNet-C
tar -xvf noise.tar -C data/ImageNet-C
tar -xvf weather.tar -C data/ImageNet-C

Usage

We have included sample scripts in cifar10-scripts, cifar100-scripts, and imagenet-scripts. For example, there are 5 scripts for CIFAR-100 and WideResNet:

  1. ./cifar100-scripts/wideresnet/run-cn.sh

  2. ./cifar100-scripts/wideresnet/run-sn.sh

  3. ./cifar100-scripts/wideresnet/run-cnsn.sh

  4. ./cifar100-scripts/wideresnet/run-cnsn-consist.sh (Use CNSN with JSD consistency regularization)

  5. ./cifar100-scripts/wideresnet/run-cnsn-augmix.sh (Use CNSN with AugMix)

Pretrained models

  • Pretrained ResNet-50 ImageNet classifiers are available:
  1. ResNet-50 + CN
  2. ResNet-50 + SN
  3. ResNet-50 + CNSN
  4. ResNet-50 + CNSN + IBN + AugMix.
  • Results of the above 4 ResNet-50 models on ImageNet:
+CN +SN +CNSN +CNSN+IBN+AugMix
Top-1 err 23.3 23.7 23.3 22.3
mCE 75.1 73.8 69.7 62.8

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