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deploy/README.md

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- [Python Inference](../doc/doc_en/inference_ppocr_en.md)
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- [C++ Inference](./cpp_infer/readme.md)
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- [Serving](./pdserving/README.md)
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- [Paddle-Lite](./lite/readme.md)
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- [Serving (Python/C++)](./pdserving/README.md)
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- [Paddle-Lite (ARM CPU/OpenCL ARM GPU/Metal ARM GPU)](./lite/readme.md)
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- [Paddle.js](./paddlejs/README.md)
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- [Jetson Inference]()
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- [XPU Inference]()
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- [Paddle2ONNX](./paddle2onnx/readme.md)
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If you need the deployment tutorial of academic algorithm models other than PP-OCR, please directly enter the main page of corresponding algorithms, [entrance](../doc/doc_en/algorithm_overview_en.md)

deploy/README_ch.md

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- [Python 推理](../doc/doc_ch/inference_ppocr.md)
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- [C++ 推理](./cpp_infer/readme_ch.md)
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- [Serving 服务化部署](./pdserving/README_CN.md)
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- [Paddle-Lite 端侧部署](./lite/readme_ch.md)
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- [Paddle.js 服务化部署](./paddlejs/README_ch.md)
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- [Serving 服务化部署(Python/C++)](./pdserving/README_CN.md)
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- [Paddle-Lite 端侧部署(ARM CPU/OpenCL ARM GPU/Metal ARM GPU)](./lite/readme_ch.md)
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- [Paddle.js 部署](./paddlejs/README_ch.md)
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- [Jetson 推理]()
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- [XPU 推理]()
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- [Paddle2ONNX 推理](./paddle2onnx/readme_ch.md)
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需要PP-OCR以外的学术算法模型的推理部署,请直接进入相应算法主页面,[入口](../doc/doc_ch/algorithm_overview.md)

doc/doc_ch/algorithm_det_db.md

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|模型|骨干网络|配置文件|precision|recall|Hmean|下载链接|
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| --- | --- | --- | --- | --- | --- | --- |
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|DB|ResNet50_vd|configs/det/det_r50_vd_db.yml|86.41%|78.72%|82.38%|[训练模型](https://paddleocr.bj.bcebos.com/dygraph_v2.0/en/det_r50_vd_db_v2.0_train.tar)|
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|DB|MobileNetV3|configs/det/det_mv3_db.yml|77.29%|73.08%|75.12%|[训练模型](https://paddleocr.bj.bcebos.com/dygraph_v2.0/en/det_mv3_db_v2.0_train.tar)|
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|DB|ResNet50_vd|[configs/det/det_r50_vd_db.yml](../../configs/det/det_r50_vd_db.yml)|86.41%|78.72%|82.38%|[训练模型](https://paddleocr.bj.bcebos.com/dygraph_v2.0/en/det_r50_vd_db_v2.0_train.tar)|
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|DB|MobileNetV3|[configs/det/det_mv3_db.yml](../../configs/det/det_mv3_db.yml)|77.29%|73.08%|75.12%|[训练模型](https://paddleocr.bj.bcebos.com/dygraph_v2.0/en/det_mv3_db_v2.0_train.tar)|
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doc/doc_ch/ppocr_introduction.md

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PP-OCR是PaddleOCR自研的实用的超轻量OCR系统。在实现[前沿算法](algorithm.md)的基础上,考虑精度与速度的平衡,进行**模型瘦身****深度优化**,使其尽可能满足产业落地需求。
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#### PP-OCR
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PP-OCR是一个两阶段的OCR系统,其中文本检测算法选用[DB](algorithm_det_db.md),文本识别算法选用[CRNN](algorithm_rec_crnn.md),并在检测和识别模块之间添加[文本方向分类器](angle_class.md),以应对不同方向的文本识别。
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PP-OCR系统pipeline如下:
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PP-OCR系统在持续迭代优化,目前已发布PP-OCR和PP-OCRv2两个版本:
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[1] PP-OCR从骨干网络选择和调整、预测头部的设计、数据增强、学习率变换策略、正则化参数选择、预训练模型使用以及模型自动裁剪量化8个方面,采用19个有效策略,对各个模块的模型进行效果调优和瘦身(如绿框所示),最终得到整体大小为3.5M的超轻量中英文OCR和2.8M的英文数字OCR。更多细节请参考PP-OCR技术方案 https://arxiv.org/abs/2009.09941
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PP-OCR从骨干网络选择和调整、预测头部的设计、数据增强、学习率变换策略、正则化参数选择、预训练模型使用以及模型自动裁剪量化8个方面,采用19个有效策略,对各个模块的模型进行效果调优和瘦身(如绿框所示),最终得到整体大小为3.5M的超轻量中英文OCR和2.8M的英文数字OCR。更多细节请参考PP-OCR技术方案 https://arxiv.org/abs/2009.09941
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#### PP-OCRv2
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PP-OCRv2在PP-OCR的基础上,进一步在5个方面重点优化,检测模型采用CML协同互学习知识蒸馏策略和CopyPaste数据增广策略;识别模型采用LCNet轻量级骨干网络、UDML 改进知识蒸馏策略和[Enhanced CTC loss](./doc/doc_ch/enhanced_ctc_loss.md)损失函数改进(如上图红框所示),进一步在推理速度和预测效果上取得明显提升。更多细节请参考PP-OCRv2[技术报告](https://arxiv.org/abs/2109.03144)
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[2] PP-OCRv2在PP-OCR的基础上,进一步在5个方面重点优化,检测模型采用CML协同互学习知识蒸馏策略和CopyPaste数据增广策略;识别模型采用LCNet轻量级骨干网络、UDML 改进知识蒸馏策略和[Enhanced CTC loss](./doc/doc_ch/enhanced_ctc_loss.md)损失函数改进(如上图红框所示),进一步在推理速度和预测效果上取得明显提升。更多细节请参考PP-OCRv2[技术报告](https://arxiv.org/abs/2109.03144)
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#### PP-OCRv3
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doc/doc_en/algorithm_det_db_en.md

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|Model|Backbone|Configuration|Precision|Recall|Hmean|Download|
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|DB|ResNet50_vd|configs/det/det_r50_vd_db.yml|86.41%|78.72%|82.38%|[trained model](https://paddleocr.bj.bcebos.com/dygraph_v2.0/en/det_r50_vd_db_v2.0_train.tar)|
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|DB|MobileNetV3|configs/det/det_mv3_db.yml|77.29%|73.08%|75.12%|[trained model](https://paddleocr.bj.bcebos.com/dygraph_v2.0/en/det_mv3_db_v2.0_train.tar)|
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|DB|ResNet50_vd|[configs/det/det_r50_vd_db.yml](../../configs/det/det_r50_vd_db.yml)|86.41%|78.72%|82.38%|[trained model](https://paddleocr.bj.bcebos.com/dygraph_v2.0/en/det_r50_vd_db_v2.0_train.tar)|
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|DB|MobileNetV3|[configs/det/det_mv3_db.yml](../../configs/det/det_mv3_db.yml)|77.29%|73.08%|75.12%|[trained model](https://paddleocr.bj.bcebos.com/dygraph_v2.0/en/det_mv3_db_v2.0_train.tar)|
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