PP-OCR: A Practical Ultra Lightweight OCR System
Authors: Yuning Du, Chenxia Li, Ruoyu Guo, Xiaoting Yin, Weiwei Liu, Jun Zhou, Yifan Bai, Zilin Yu, Yehua Yang, Qingqing Dang, Haoshuang Wang
AI-generated Key Points
- Optical Character Recognition (OCR) systems are popular in various application scenarios
- OCR remains a challenging task due to diverse text appearances and computational efficiency needs
- Yuning Du et al. propose a practical ultra-lightweight OCR system called PP-OCR
- PP-OCR has an overall model size of only 3.5M for recognizing 6622 Chinese characters and 2.8M for recognizing 63 alphanumeric symbols
- The authors introduce several strategies to enhance the model's ability or reduce its size while maintaining high accuracy levels
- The authors release several pre-trained models for Chinese and English recognition that include a text detector, direction classifier, and text recognizer
- These models are open-sourced and available on GitHub repository https://github.com/PaddlePaddle/PaddleOCR.
- PP-OCR is verified in several other language recognition tasks such as French, Korean, Japanese, and German.
- The system achieves state-of-the-art performance on these tasks while maintaining its ultra-lightweight design.
- PP-OCR offers high accuracy levels while being lightweight enough to run efficiently on low-power devices such as smartphones or embedded systems.
- Its open source nature makes it accessible to developers worldwide who can leverage its capabilities in various applications requiring OCR technology.
Abstract: The Optical Character Recognition (OCR) systems have been widely used in various of application scenarios, such as office automation (OA) systems, factory automations, online educations, map productions etc. However, OCR is still a challenging task due to the various of text appearances and the demand of computational efficiency. In this paper, we propose a practical ultra lightweight OCR system, i.e., PP-OCR. The overall model size of the PP-OCR is only 3.5M for recognizing 6622 Chinese characters and 2.8M for recognizing 63 alphanumeric symbols, respectively. We introduce a bag of strategies to either enhance the model ability or reduce the model size. The corresponding ablation experiments with the real data are also provided. Meanwhile, several pre-trained models for the Chinese and English recognition are released, including a text detector (97K images are used), a direction classifier (600K images are used) as well as a text recognizer (17.9M images are used). Besides, the proposed PP-OCR are also verified in several other language recognition tasks, including French, Korean, Japanese and German. All of the above mentioned models are open-sourced and the codes are available in the GitHub repository, i.e., https://github.com/PaddlePaddle/PaddleOCR.
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