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Introduction

PaddleOCR aims to create rich, leading, and practical OCR tools that help users train better models and apply them into practice.

Recent updates

• 2020.9.22 Update the PP-OCR technical article, https://arxiv.org/abs/2009.09941
• 2020.9.19 Update the ultra lightweight compressed ppocr_mobile_slim series models, the overall model size is 3.5M (see PP-OCR Pipline), suitable for mobile deployment. Model Downloads
• 2020.9.17 Update the ultra lightweight ppocr_mobile series and general ppocr_server series Chinese and English ocr models, which are comparable to commercial effects. Model Downloads
• 2020.9.17 update English recognition model and Multilingual recognition model, German, French, Japanese and Korean have been supported. Models for more languages will continue to be updated.
• 2020.8.24 Support the use of PaddleOCR through whl package installation，pelease refer PaddleOCR Package
• 2020.8.21 Update the replay and PPT of the live lesson at Bilibili on August 18, lesson 2, easy to learn and use OCR tool spree. Get Address
• more

Features

• PPOCR series of high-quality pre-trained models, comparable to commercial effects
  • Ultra lightweight ppocr_mobile series models: detection (2.6M) + direction classifier (0.9M) + recognition (4.6M) = 8.1M
  • General ppocr_server series models: detection (47.2M) + direction classifier (0.9M) + recognition (107M) = 155.1M
  • Ultra lightweight compression ppocr_mobile_slim series models: detection (1.4M) + direction classifier (0.5M) + recognition (1.6M) = 3.5M
• Support Chinese, English, and digit recognition, vertical text recognition, and long text recognition
• Support multi-language recognition: Korean, Japanese, German, French
• Support user-defined training, provides rich predictive inference deployment solutions
• Support PIP installation, easy to use
• Support Linux, Windows, MacOS and other systems

Visualization

The above pictures are the visualizations of the general ppocr_server model. For more effect pictures, please see More visualizations.

Quick Experience

You can also quickly experience the ultra-lightweight OCR : Online Experience

Mobile DEMO experience (based on EasyEdge and Paddle-Lite, supports iOS and Android systems): Sign in to the website to obtain the QR code for installing the App

Also, you can scan the QR code below to install the App (Android support only)

• OCR Quick Start

PP-OCR 1.1 series model list（Update on Sep 17）

Model introduction	Model name	Recommended scene	Detection model	Direction classifier	Recognition model
Chinese and English ultra-lightweight OCR model (8.1M)	ch_ppocr_mobile_v1.1_xx	Mobile & server	inference model / pre-trained model	inference model / pre-trained model	inference model / pre-trained model
Chinese and English general OCR model (155.1M)	ch_ppocr_server_v1.1_xx	Server	inference model / pre-trained model	inference model / pre-trained model	inference model / pre-trained model
Chinese and English ultra-lightweight compressed OCR model (3.5M)	ch_ppocr_mobile_slim_v1.1_xx	Mobile	inference model / slim model	inference model / slim model	inference model / slim model

For more model downloads (including multiple languages), please refer to PP-OCR v1.1 series model downloads

Tutorials

• Installation
• Quick Start
• Code Structure
• Algorithm introduction
  • Text Detection Algorithm
  • Text Recognition Algorithm
  • PP-OCR Pipline
• Model training/evaluation
  • Text Detection
  • Text Recognition
  • Direction Classification
  • Yml Configuration
• Inference and Deployment
  • Quick inference based on pip
  • Python Inference
  • C++ Inference
  • Serving
  • Mobile
  • Model Quantization
  • Model Compression
  • Benchmark
• Datasets
  • General OCR Datasets(Chinese/English)
  • HandWritten_OCR_Datasets(Chinese)
  • Various OCR Datasets(multilingual)
  • Data Annotation Tools
  • Data Synthesis Tools
• Visualization
• FAQ
• Community
• References
• License
• Contribution

PP-OCR Pipline

PP-OCR is a practical ultra-lightweight OCR system. It is mainly composed of three parts: DB text detection, detection frame correction and CRNN text recognition. The system adopts 19 effective strategies from 8 aspects including backbone network selection and adjustment, prediction head design, data augmentation, learning rate transformation strategy, regularization parameter selection, pre-training model use, and automatic model tailoring and quantization to optimize and slim down the models of each module. The final results are an ultra-lightweight Chinese and English OCR model with an overall size of 3.5M and a 2.8M English digital OCR model. For more details, please refer to the PP-OCR technical article (https://arxiv.org/abs/2009.09941). Besides, The implementation of the FPGM Pruner and PACT quantization is based on PaddleSlim.

Visualization more

• Chinese OCR model

• English OCR model

• Multilingual OCR model

Community

Scan the QR code below with your Wechat and completing the questionnaire, you can access to official technical exchange group.

License

This project is released under Apache 2.0 license

Contribution

We welcome all the contributions to PaddleOCR and appreciate for your feedback very much.

• Many thanks to Khanh Tran and Karl Horky for contributing and revising the English documentation.
• Many thanks to zhangxin for contributing the new visualize function、add .gitgnore and discard set PYTHONPATH manually.
• Many thanks to lyl120117 for contributing the code for printing the network structure.
• Thanks xiangyubo for contributing the handwritten Chinese OCR datasets.
• Thanks authorfu for contributing Android demo and xiadeye contributing iOS demo, respectively.
• Thanks BeyondYourself for contributing many great suggestions and simplifying part of the code style.
• Thanks tangmq for contributing Dockerized deployment services to PaddleOCR and supporting the rapid release of callable Restful API services.