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# 场景文本识别算法-SVTRv2 | ||
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- [1. 算法简介](#1) | ||
- [2. 环境配置](#2) | ||
- [3. 模型训练、评估、预测](#3) | ||
- [3.1 训练](#3-1) | ||
- [3.2 评估](#3-2) | ||
- [3.3 预测](#3-3) | ||
- [4. 推理部署](#4) | ||
- [4.1 Python推理](#4-1) | ||
- [4.2 C++推理](#4-2) | ||
- [4.3 Serving服务化部署](#4-3) | ||
- [4.4 更多推理部署](#4-4) | ||
- [5. FAQ](#5) | ||
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<a name="1"></a> | ||
## 1. 算法简介 | ||
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### SVTRv2算法简介 | ||
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<a name="1"></a> | ||
[PaddleOCR 算法模型挑战赛 - 赛题一:OCR 端到端识别任务](https://aistudio.baidu.com/competition/detail/1131/0/introduction)排行榜第一算法。主要思路:1、检测和识别模型的Backbone升级为RepSVTR;2、识别教师模型升级为SVTRv2,可识别长文本。 | ||
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<a name="2"></a> | ||
## 2. 环境配置 | ||
请先参考[《运行环境准备》](./environment.md)配置PaddleOCR运行环境,参考[《项目克隆》](./clone.md)克隆项目代码。 | ||
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## 3. 模型训练、评估、预测 | ||
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<a name="3-1"></a> | ||
### 3.1 模型训练 | ||
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训练命令: | ||
```shell | ||
#单卡训练(训练周期长,不建议) | ||
python3 tools/train.py -c configs/rec/SVTRv2/rec_repsvtr_gtc.yml | ||
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#多卡训练,通过--gpus参数指定卡号 | ||
# Rec 学生模型 | ||
python -m paddle.distributed.launch --gpus '0,1,2,3,4,5,6,7' tools/train.py -c configs/rec/SVTRv2/rec_repsvtr_gtc.yml | ||
# Rec 教师模型 | ||
python -m paddle.distributed.launch --gpus '0,1,2,3,4,5,6,7' tools/train.py -c configs/rec/SVTRv2/rec_svtrv2_gtc.yml | ||
# Rec 蒸馏训练 | ||
python -m paddle.distributed.launch --gpus '0,1,2,3,4,5,6,7' tools/train.py -c configs/rec/SVTRv2/rec_svtrv2_gtc_distill.yml | ||
``` | ||
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### 3.2 评估 | ||
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```shell | ||
# 注意将pretrained_model的路径设置为本地路径。 | ||
python3 -m paddle.distributed.launch --gpus '0' tools/eval.py -c configs/rec/SVTRv2/rec_repsvtr_gtc.yml -o Global.pretrained_model=output/rec_repsvtr_gtc/best_accuracy | ||
``` | ||
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<a name="3-3"></a> | ||
### 3.3 预测 | ||
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使用如下命令进行单张图片预测: | ||
```shell | ||
# 注意将pretrained_model的路径设置为本地路径。 | ||
python3 tools/infer_rec.py -c tools/eval.py -c configs/rec/SVTRv2/rec_repsvtr_gtc.yml -o Global.pretrained_model=output/rec_repsvtr_gtc/best_accuracy Global.infer_img='./doc/imgs_words_en/word_10.png' | ||
# 预测文件夹下所有图像时,可修改infer_img为文件夹,如 Global.infer_img='./doc/imgs_words_en/'。 | ||
``` | ||
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<a name="4"></a> | ||
## 4. 推理部署 | ||
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<a name="4-1"></a> | ||
### 4.1 Python推理 | ||
首先将训练得到best模型,转换成inference model,以RepSVTR为例,可以使用如下命令进行转换: | ||
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```shell | ||
# 注意将pretrained_model的路径设置为本地路径。 | ||
python3 tools/export_model.py -c configs/rec/SVTRv2/rec_repsvtr_gtc.yml -o Global.pretrained_model=output/rec_repsvtr_gtc/best_accuracy Global.save_inference_dir=./inference/rec_repsvtr_infer | ||
``` | ||
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**注意:** | ||
- 如果您是在自己的数据集上训练的模型,并且调整了字典文件,请注意修改配置文件中的`character_dict_path`是否为所正确的字典文件。 | ||
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转换成功后,在目录下有三个文件: | ||
``` | ||
./inference/rec_repsvtr_infer/ | ||
├── inference.pdiparams # 识别inference模型的参数文件 | ||
├── inference.pdiparams.info # 识别inference模型的参数信息,可忽略 | ||
└── inference.pdmodel # 识别inference模型的program文件 | ||
``` | ||
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执行如下命令进行模型推理: | ||
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```shell | ||
python3 tools/infer/predict_rec.py --image_dir='./doc/imgs_words_en/word_10.png' --rec_model_dir='./inference/rec_repsvtr_infer/' | ||
# 预测文件夹下所有图像时,可修改image_dir为文件夹,如 --image_dir='./doc/imgs_words_en/'。 | ||
``` | ||
![](../imgs_words_en/word_10.png) | ||
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执行命令后,上面图像的预测结果(识别的文本和得分)会打印到屏幕上,示例如下: | ||
结果如下: | ||
```shell | ||
Predicts of ./doc/imgs_words_en/word_10.png:('pain', 0.9999998807907104) | ||
``` | ||
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**注意**: | ||
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- 如果您调整了训练时的输入分辨率,需要通过参数`rec_image_shape`设置为您需要的识别图像形状。 | ||
- 在推理时需要设置参数`rec_char_dict_path`指定字典,如果您修改了字典,请修改该参数为您的字典文件。 | ||
- 如果您修改了预处理方法,需修改`tools/infer/predict_rec.py`中SVTR的预处理为您的预处理方法。 | ||
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<a name="4-2"></a> | ||
### 4.2 C++推理部署 | ||
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由于C++预处理后处理还未支持SVTRv2 | ||
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<a name="4-3"></a> | ||
### 4.3 Serving服务化部署 | ||
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暂不支持 | ||
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### 4.4 更多推理部署 | ||
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暂不支持 | ||
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<a name="5"></a> | ||
## 5. FAQ | ||
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## 引用 | ||
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```bibtex | ||
@article{Du2022SVTR, | ||
title = {SVTR: Scene Text Recognition with a Single Visual Model}, | ||
author = {Du, Yongkun and Chen, Zhineng and Jia, Caiyan and Yin, Xiaoting and Zheng, Tianlun and Li, Chenxia and Du, Yuning and Jiang, Yu-Gang}, | ||
booktitle = {IJCAI}, | ||
year = {2022}, | ||
url = {https://arxiv.org/abs/2205.00159} | ||
} | ||
``` |