Adjust Decision Boundary for Class Imbalanced Learning

Related tags

Deep LearningAdjustBnd4Imbalance
Overview

Adjusting Decision Boundary for Class Imbalanced Learning

This repository is the official PyTorch implementation of WVN-RS, introduced in Adjusting Decision Boundary for Class Imbalanced Learning.

Requirements

  1. NVIDIA docker : Docker image will be pulled from cloud.
  2. CIFAR dataset : The "dataset_path" in run_cifar.sh should be
cifar10/
    data_batch_N
    test_batch
cifar100/
    train
    test

CIFAR datasets are available here.

How to use

Run the shell script.

bash run_cifar.sh

To use Weight Vector Normalization (WVN), use --WVN flag. (It is already in the script.)

Results

  1. Validation error on Long-Tailed CIFAR10
Imbalance 200 100 50 20 10 1
Baseline 35.67 29.71 22.91 16.04 13.26 6.83
Over-sample 32.19 28.27 21.40 15.23 12.24 6.61
Focal 34.71 29.62 23.28 16.77 13.19 6.60
CB 31.11 25.43 20.73 15.64 12.51 6.36
LDAM-DRW 28.09 22.97 17.83 14.53 11.84 6.32
Baseline+RS 27.02 21.36 17.16 13.46 11.86 6.32
WVN+RS 27.23 20.17 16.80 12.76 10.71 6.29
  1. Validation error on Long-Tailed CIFAR100
Imbalance 200 100 50 20 10 1
Baseline 64.21 60.38 55.09 48.93 43.52 29.69
Over-sample 66.39 61.53 56.65 49.03 43.38 29.41
Focal 64.38 61.31 55.68 48.05 44.22 28.52
CB 63.77 60.40 54.68 47.41 42.01 28.39
LDAM-DRW 61.73 57.96 52.54 47.14 41.29 28.85
Baseline+RS 59.59 55.65 51.91 45.09 41.45 29.80
WVN+RS 59.48 55.50 51.80 46.12 41.02 29.22

Notes

This codes use docker image "feidfoe/pytorch:v.2" with pytorch version, '0.4.0a0+0640816'. The image only provides basic libraries such as NumPy or PIL.

WVN is implemented on ResNet architecture only.

Baseline repository

This repository is forked and modified from original repo.

Contact

Byungju Kim ([email protected])

BibTeX for Citation

@ARTICLE{9081988,
  author={B. {Kim} and J. {Kim}},
  journal={IEEE Access}, 
  title={Adjusting Decision Boundary for Class Imbalanced Learning}, 
  year={2020},
  volume={8},
  number={},
  pages={81674-81685},}
Owner
Peyton Byungju Kim
Peyton Byungju Kim
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