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Gradient Reweighting: Towards Imbalanced Class-Incremental Learning [CVPR 2024]

This repository is the official PyTorch implementation of Gradient Reweighting: Towards Imbalanced Class-Incremental Learning [paper].

Running with Pre-trained Models:

The implementation of our method DGR by using Pre-Trained Models (PTM) is also available in LAMDA-PILOT: https://github.com/sun-hailong/LAMDA-PILOT

A duplicate of the implementation can be found in '/Continual Learning with Pretrained Models/'

Training Instructions

To run the code, navigate to /script/ and execute the provided bash script with the following format:

bash main.sh <approach> <gpu> <dataset> <scenario> <initial_classes> <total_tasks>

Parameter Specifications:

• <approach>: Approach to be used, located in ./src/approaches/.
  • DGR: our proposed Decoupled Gradients Reweighting (DGR) method.
• <gpu>: Index of the GPU to run the experiment.
• <dataset>: Dataset to be used (Options: cifar100, imagenet_subset, imagenet_1000, Food101).
• <scenario>: Learning scenario, including:
  • conv: Conventional CIL.
  • lt: Shuffled long-tailed scenario (experiments in main paper).
  • ltio: Ordered long-tailed scenario.
• <initial_classes>: Number of classes in the first base task.
• <total_tasks>: Total number of tasks (including the base task).

Examples:

• Shuffled long-tailed case with LFS, 20 tasks on CIFAR100:

bash main.sh DGR 0 cifar100 lt 5 20

• Shuffled long-tailed case with LFH, 10 tasks on ImageNetSubset:

bash main.sh DGR 0 imagenet_subset lt 50 11

• Ordered long-tailed case with LFH, 5 tasks on Food101:

bash main.sh DGR 0 Food101 ltio 51 6

• Conventional case with LFS, 10 tasks on ImageNet_1000:

bash main.sh DGR 0 imagenet_1000 conv 100 10

Reference:

If you find this work useful, please cite us by:

@article{He_2024_CVPR,
    author    = {He, Jiangpeng},
    title     = {Gradient Reweighting: Towards Imbalanced Class-Incremental Learning},
    journal = {Proceedings of the IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR)},
    month     = {June},
    year      = {2024},
    pages     = {16668-16677}
}

Acknowledgment:

The main implementation of this repository and existing methods are obtained from "Long-Tailed Class-Incremental Learning": https://github.com/xialeiliu/Long-Tailed-CIL