Canjie-Luo / Text Image Augmentation
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Text Image Augmentation
A general geometric augmentation tool for text images in the CVPR 2020 paper "Learn to Augment: Joint Data Augmentation and Network Optimization for Text Recognition". We provide the tool to avoid overfitting and gain robustness of text recognizers.
Note that this is a general toolkit. Please customize for your specific task. If the repo benefits your work, please cite the papers.
News
-
2020-02 The paper "Learn to Augment: Joint Data Augmentation and Network Optimization for Text Recognition" was accepted to CVPR 2020. It is a preliminary attempt for smart augmentation.
-
2019-11 The paper "Decoupled Attention Network for Text Recognition" (Paper Code) was accepted to AAAI 2020. This augmentation tool was used in the experiments of handwritten text recognition.
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2019-04 We applied this tool in the ReCTS competition of ICDAR 2019. Our ensemble model won the championship.
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2019-01 The similarity transformation was specifically customized for geomeric augmentation of text images.
Requirements
We recommend Anaconda to manage the version of your dependencies. For example:
conda install boost=1.67.0
Installation
Build library:
mkdir build
cd build
cmake -D CUDA_USE_STATIC_CUDA_RUNTIME=OFF ..
make
Copy the Augment.so to the target folder and follow demo.py to use the tool.
cp Augment.so ..
cd ..
python demo.py
Demo
- Distortion
- Stretch
- Perspective
Speed
To transform an image with size (H:64, W:200), it takes less than 3ms using a 2.0GHz CPU. It is possible to accelerate the process by calling multi-process batch samplers in an on-the-fly manner, such as setting "num_workers" in PyTorch.
Improvement for Recognition
We compare the accuracies of CRNN trained using only the corresponding small training set.
| Dataset | IIIT5K | IC13 | IC15 |
|---|---|---|---|
| Without Data Augmentation | 40.8% | 6.8% | 8.7% |
| With Data Augmentation | 53.4% | 9.6% | 24.9% |
Citation
@inproceedings{luo2020learn,
author = {Canjie Luo and Yuanzhi Zhu and Lianwen Jin and Yongpan Wang},
title = {Learn to Augment: Joint Data Augmentation and Network Optimization for Text Recognition},
booktitle = {CVPR},
year = {2020}
}
@inproceedings{wang2020decoupled,
author = {Tianwei Wang and Yuanzhi Zhu and Lianwen Jin and Canjie Luo and Xiaoxue Chen and Yaqiang Wu and Qianying Wang and Mingxiang Cai},
title = {Decoupled attention network for text recognition},
booktitle ={AAAI},
year = {2020}
}
@article{schaefer2006image,
title={Image deformation using moving least squares},
author={Schaefer, Scott and McPhail, Travis and Warren, Joe},
journal={ACM Transactions on Graphics (TOG)},
volume={25},
number={3},
pages={533--540},
year={2006},
publisher={ACM New York, NY, USA}
}
Acknowledgment
Thanks for the contribution of the following developers.
Attention
The tool is only free for academic research purposes.