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<center>Prototype-Guided Continual Adaptation for Class-Incremental Unsupervised Domain Adaptation</center>

This repository provides the official implementation for "Prototype-Guided Continual Adaptation for Class-Incremental Unsupervised Domain Adaptation". (ECCV 2022)

Paper

• We study a new yet difficult problem, called Class-incremental Unsupervised Domain Adaptation (CI-UDA), where unlabeled target samples come incrementally and only partial target classes are available at a time. Compared to vanilla UDA, CI-UDA does not assume all target data to be known in advance, and thus opens the opportunity for tackling more practical UDA scenarios in the wild.

• Meanwhile, we propose a novel ProCA to handle CI-UDA. By innovatively identifying target label prototypes, ProCA alleviates not only domain discrepancies via prototype-based alignment but also catastrophic forgetting via prototype-based knowledge replay, simultaneously. Moreover, ProCA can be applied to enhance existing partial domain adaptation methods to overcome CI-UDA.

Getting Started

Installation

• Clone this repository:

git clone https://github.com/SCUT-AILab/ProCA.git
cd ProCA

• Install the requirements by runing the following command:

pip install -r requirements.txt

Data Preparation

• The .txt files of data list and its corresponding labels have been put in the directory ./data_splits.

• Please manually download the Office31, Office-Home and ImageNet-Caltech benchmark from the official websites and put it in the corresponding directory (e.g., '../../dataset/ImageNet-Caltech').

• Put the corresponding .txt file in your path (e.g., '../../dataset/ImageNet-Caltech/caltech_list.txt').

Source Pre-trained

• First, to obtain the pre-trained model on the source domain:

from Art to Clipart on Office-Home-CI:

python OH_source_Train.py --gpu 0 --source 0

from Caltech256 to ImageNet84:

python cal256_source_Train.py --gpu 0

Adapt to the Target Domain

• Second, to train ProCA on the target domain (please assign a source-trained model path):

from Art to Clipart on Office-Home-CI:

python OH_adapt_2_target.py --gpu 0 --source 0 --target 1 --source_model ./model_source/20220715-1518-OH_Art_ce_singe_gpu_resnet50_best.pkl

from Caltech256 to ImageNet84:

python IC_from_c_2_i.py --gpu 0 --source_model ./model_source/20220714-1949-single_gpu_cal256_ce_resnet50_best.pkl

Results

Final accuracies (%) on the Office-Home-CI dataset (ResNet-50).

Final accuracies (%) on the Office-31-CI and ImageNet-Caltech dataset (ResNet-50).

Citation

If you find our work useful in your research, please cite the following paper:

@inproceedings{Lin2022ProCA,
  title={Prototype-Guided Continual Adaptation for Class-Incremental Unsupervised Domain Adaptation},
  author={Hongbin Lin and Yifan Zhang and Zhen Qiu and Shuaicheng Niu and Chuang Gan and Yanxia Liu and Mingkui Tan},
  booktitle={European Conference on Computer Vision},
  year={2022}
}

Contact

For any question, please file an issue or contact

Hongbin Lin: sehongbinlin@mail.scut.edu.cn
Zhen Qiu: seqiuzhen@mail.scut.edu.cn