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DivideMix

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Code for paper: DivideMix: Learning with Noisy Labels as Semi-supervised Learning

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# DivideMix: Learning with Noisy Labels as Semi-supervised Learning
PyTorch Code for the following paper at ICLR2020:\
Title: DivideMix: Learning with Noisy Labels as Semi-supervised Learning <a href="https://openreview.net/pdf?id=HJgExaVtwr">[pdf]</a>\
Authors:Junnan Li, Richard Socher, Steven C.H. Hoi\
Institute: Salesforce Research

Abstract\
Deep neural networks are known to be annotation-hungry. Numerous efforts have been devoted to reduce the annotation cost when learning with deep networks. Two prominent directions include learning with noisy labels and semi-supervised learning by exploiting unlabeled data. In this work, we propose DivideMix, a novel framework for learning with noisy labels by leveraging semi-supervised learning techniques. In particular, DivideMix models the per-sample loss distribution with a mixture model to dynamically divide the training data into a labeled set with clean samples and an unlabeled set with noisy samples, and trains the model on both the labeled and unlabeled data in a semi-supervised manner. To avoid confirmation bias, we simultaneously train two diverged networks where each network uses the dataset division from the other network. During the semi-supervised training phase, we improve the MixMatch strategy by performing label co-refinement and label co-guessing on labeled and unlabeled samples, respectively. Experiments on multiple benchmark datasets demonstrate substantial improvements over state-of-the-art methods.

Illustration\
<img src="./img/framework.png">

Experiments\
First, please create a folder named checkpoint to store the results.\
<code>mkdir checkpoint</code>\
Next, run \
<code>python Train_{dataset_name}.py --data_path path-to-your-data</code>

Cite DivideMix\
If you find the code useful in your research, please consider citing our paper:

<pre>
@inproceedings{
 li2020dividemix,
 title={DivideMix: Learning with Noisy Labels as Semi-supervised Learning},
 author={Junnan Li and Richard Socher and Steven C.H. Hoi},
 booktitle={International Conference on Learning Representations},
 year={2020},
}</pre>

License\
This project is licensed under the terms of the MIT license.

DivideMix

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