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Latexocr paddle (PaddlePaddle#13401)
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Global: | ||
use_gpu: True | ||
epoch_num: 500 | ||
log_smooth_window: 20 | ||
print_batch_step: 100 | ||
save_model_dir: ./output/rec/latex_ocr/ | ||
save_epoch_step: 5 | ||
max_seq_len: 512 | ||
# evaluation is run every 60000 iterations (22 epoch)(batch_size = 56) | ||
eval_batch_step: [0, 60000] | ||
cal_metric_during_train: True | ||
pretrained_model: | ||
checkpoints: | ||
save_inference_dir: | ||
use_visualdl: False | ||
infer_img: doc/datasets/pme_demo/0000013.png | ||
infer_mode: False | ||
use_space_char: False | ||
rec_char_dict_path: ppocr/utils/dict/latex_ocr_tokenizer.json | ||
save_res_path: ./output/rec/predicts_latexocr.txt | ||
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Optimizer: | ||
name: AdamW | ||
beta1: 0.9 | ||
beta2: 0.999 | ||
lr: | ||
name: Const | ||
learning_rate: 0.0001 | ||
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Architecture: | ||
model_type: rec | ||
algorithm: LaTeXOCR | ||
in_channels: 1 | ||
Transform: | ||
Backbone: | ||
name: HybridTransformer | ||
img_size: [192, 672] | ||
patch_size: 16 | ||
num_classes: 0 | ||
embed_dim: 256 | ||
depth: 4 | ||
num_heads: 8 | ||
input_channel: 1 | ||
is_predict: False | ||
is_export: False | ||
Head: | ||
name: LaTeXOCRHead | ||
pad_value: 0 | ||
is_export: False | ||
decoder_args: | ||
attn_on_attn: True | ||
cross_attend: True | ||
ff_glu: True | ||
rel_pos_bias: False | ||
use_scalenorm: False | ||
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Loss: | ||
name: LaTeXOCRLoss | ||
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PostProcess: | ||
name: LaTeXOCRDecode | ||
rec_char_dict_path: ppocr/utils/dict/latex_ocr_tokenizer.json | ||
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Metric: | ||
name: LaTeXOCRMetric | ||
main_indicator: exp_rate | ||
cal_blue_score: False | ||
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Train: | ||
dataset: | ||
name: LaTeXOCRDataSet | ||
data: ./train_data/LaTeXOCR/latexocr_train.pkl | ||
min_dimensions: [32, 32] | ||
max_dimensions: [672, 192] | ||
batch_size_per_pair: 56 | ||
keep_smaller_batches: False | ||
transforms: | ||
- DecodeImage: | ||
channel_first: False | ||
- MinMaxResize: | ||
min_dimensions: [32, 32] | ||
max_dimensions: [672, 192] | ||
- LatexTrainTransform: | ||
bitmap_prob: .04 | ||
- NormalizeImage: | ||
mean: [0.7931, 0.7931, 0.7931] | ||
std: [0.1738, 0.1738, 0.1738] | ||
order: 'hwc' | ||
- LatexImageFormat: | ||
- KeepKeys: | ||
keep_keys: ['image'] | ||
loader: | ||
shuffle: True | ||
batch_size_per_card: 1 | ||
drop_last: False | ||
num_workers: 0 | ||
collate_fn: LaTeXOCRCollator | ||
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Eval: | ||
dataset: | ||
name: LaTeXOCRDataSet | ||
data: ./train_data/LaTeXOCR/latexocr_val.pkl | ||
min_dimensions: [32, 32] | ||
max_dimensions: [672, 192] | ||
batch_size_per_pair: 10 | ||
keep_smaller_batches: True | ||
transforms: | ||
- DecodeImage: | ||
channel_first: False | ||
- MinMaxResize: | ||
min_dimensions: [32, 32] | ||
max_dimensions: [672, 192] | ||
- LatexTestTransform: | ||
- NormalizeImage: | ||
mean: [0.7931, 0.7931, 0.7931] | ||
std: [0.1738, 0.1738, 0.1738] | ||
order: 'hwc' | ||
- LatexImageFormat: | ||
- KeepKeys: | ||
keep_keys: ['image'] | ||
loader: | ||
shuffle: False | ||
drop_last: False | ||
batch_size_per_card: 1 | ||
num_workers: 0 | ||
collate_fn: LaTeXOCRCollator |
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# 印刷数学公式识别算法-LaTeX-OCR | ||
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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 pickle 标签文件生成](#3-1) | ||
- [3.2 训练](#3-2) | ||
- [3.3 评估](#3-3) | ||
- [3.4 预测](#3-4) | ||
- [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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原始项目: | ||
> [https://github.com/lukas-blecher/LaTeX-OCR](https://github.com/lukas-blecher/LaTeX-OCR) | ||
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<a name="model"></a> | ||
`LaTeX-OCR`使用[`LaTeX-OCR印刷公式数据集`](https://drive.google.com/drive/folders/13CA4vAmOmD_I_dSbvLp-Lf0s6KiaNfuO)进行训练,在对应测试集上的精度如下: | ||
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| 模型 | 骨干网络 |配置文件 | BLEU score | normed edit distance | ExpRate |下载链接| | ||
|-----------|------------| ----- |:-----------:|:---------------------:|:---------:| ----- | | ||
| LaTeX-OCR | Hybrid ViT |[rec_latex_ocr.yml](../../configs/rec/rec_latex_ocr.yml)| 0.8821 | 0.0823 | 40.01% |[训练模型](https://paddleocr.bj.bcebos.com/contribution/rec_latex_ocr_train.tar)| | ||
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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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<a name="3"></a> | ||
## 3. 模型训练、评估、预测 | ||
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<a name="3-1"></a> | ||
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### 3.1 pickle 标签文件生成 | ||
从[谷歌云盘](https://drive.google.com/drive/folders/13CA4vAmOmD_I_dSbvLp-Lf0s6KiaNfuO)中下载 formulae.zip 和 math.txt,之后,使用如下命令,生成 pickle 标签文件。 | ||
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```shell | ||
# 创建 LaTeX-OCR 数据集目录 | ||
mkdir -p train_data/LaTeXOCR | ||
# 解压formulae.zip ,并拷贝math.txt | ||
unzip -d train_data/LaTeXOCR path/formulae.zip | ||
cp path/math.txt train_data/LaTeXOCR | ||
# 将原始的 .txt 文件转换为 .pkl 文件,从而对不同尺度的图像进行分组 | ||
# 训练集转换 | ||
python ppocr/utils/formula_utils/math_txt2pkl.py --image_dir=train_data/LaTeXOCR/train --mathtxt_path=train_data/LaTeXOCR/math.txt --output_dir=train_data/LaTeXOCR/ | ||
# 验证集转换 | ||
python ppocr/utils/formula_utils/math_txt2pkl.py --image_dir=train_data/LaTeXOCR/val --mathtxt_path=train_data/LaTeXOCR/math.txt --output_dir=train_data/LaTeXOCR/ | ||
# 测试集转换 | ||
python ppocr/utils/formula_utils/math_txt2pkl.py --image_dir=train_data/LaTeXOCR/test --mathtxt_path=train_data/LaTeXOCR/math.txt --output_dir=train_data/LaTeXOCR/ | ||
``` | ||
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### 3.2 模型训练 | ||
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请参考[文本识别训练教程](./recognition.md)。PaddleOCR对代码进行了模块化,训练`LaTeX-OCR`识别模型时需要**更换配置文件**为`LaTeX-OCR`的[配置文件](../../configs/rec/rec_latex_ocr.yml)。 | ||
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#### 启动训练 | ||
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具体地,在完成数据准备后,便可以启动训练,训练命令如下: | ||
```shell | ||
#单卡训练 (默认训练方式) | ||
python3 tools/train.py -c configs/rec/rec_latex_ocr.yml | ||
#多卡训练,通过--gpus参数指定卡号 | ||
python3 -m paddle.distributed.launch --gpus '0,1,2,3' tools/train.py -c configs/rec/rec_latex_ocr.yml | ||
``` | ||
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**注意:** | ||
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- 默认每训练22个epoch(60000次iteration)进行1次评估,若您更改训练的batch_size,或更换数据集,请在训练时作出如下修改 | ||
``` | ||
python3 tools/train.py -c configs/rec/rec_latex_ocr.yml -o Global.eval_batch_step=[0,{length_of_dataset//batch_size*22}] | ||
``` | ||
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<a name="3-2"></a> | ||
### 3.3 评估 | ||
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可下载已训练完成的[模型文件](https://paddleocr.bj.bcebos.com/contribution/rec_latex_ocr_train.tar),使用如下命令进行评估: | ||
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```shell | ||
# 注意将pretrained_model的路径设置为本地路径。若使用自行训练保存的模型,请注意修改路径和文件名为{path/to/weights}/{model_name}。 | ||
# 验证集评估 | ||
python3 tools/eval.py -c configs/rec/rec_latex_ocr.yml -o Global.pretrained_model=./rec_latex_ocr_train/best_accuracy.pdparams Metric.cal_blue_score=True | ||
# 测试集评估 | ||
python3 tools/eval.py -c configs/rec/rec_latex_ocr.yml -o Global.pretrained_model=./rec_latex_ocr_train/best_accuracy.pdparams Metric.cal_blue_score=True Eval.dataset.data=./train_data/LaTeXOCR/latexocr_test.pkl | ||
``` | ||
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<a name="3-3"></a> | ||
### 3.4 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 configs/rec/rec_latex_ocr.yml -o Architecture.Backbone.is_predict=True Architecture.Backbone.is_export=True Architecture.Head.is_export=True Global.infer_img='./doc/datasets/pme_demo/0000013.png' Global.pretrained_model=./rec_latex_ocr_train/best_accuracy.pdparams | ||
# 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/datasets/pme_demo/'。 | ||
``` | ||
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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。这里以训练完成的模型为例([模型下载地址](https://paddleocr.bj.bcebos.com/contribution/rec_latex_ocr_train.tar) ),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/rec_latex_ocr.yml -o Global.pretrained_model=./rec_latex_ocr_train/best_accuracy.pdparams Global.save_inference_dir=./inference/rec_latex_ocr_infer/ Architecture.Backbone.is_predict=True Architecture.Backbone.is_export=True Architecture.Head.is_export=True | ||
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# 目前的静态图模型支持的最大输出长度为512 | ||
``` | ||
**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,请检查配置文件中的`rec_char_dict_path`是否为所需要的字典文件。 | ||
- [转换后模型下载地址](https://paddleocr.bj.bcebos.com/contribution/rec_latex_ocr_infer.tar) | ||
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转换成功后,在目录下有三个文件: | ||
``` | ||
/inference/rec_latex_ocr_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/datasets/pme_demo/0000295.png' --rec_algorithm="LaTeXOCR" --rec_batch_num=1 --rec_model_dir="./inference/rec_latex_ocr_infer/" --rec_char_dict_path="./ppocr/utils/dict/latex_ocr_tokenizer.json" | ||
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# 预测文件夹下所有图像时,可修改image_dir为文件夹,如 --image_dir='./doc/datasets/pme_demo/'。 | ||
``` | ||
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![测试图片样例](../datasets/pme_demo/0000295.png) | ||
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执行命令后,上面图像的预测结果(识别的文本)会打印到屏幕上,示例如下: | ||
```shell | ||
Predicts of ./doc/datasets/pme_demo/0000295.png:\zeta_{0}(\nu)=-{\frac{\nu\varrho^{-2\nu}}{\pi}}\int_{\mu}^{\infty}d\omega\int_{C_{+}}d z{\frac{2z^{2}}{(z^{2}+\omega^{2})^{\nu+1}}}{\tilde{\Psi}}(\omega;z)e^{i\epsilon z}~~~, | ||
``` | ||
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**注意**: | ||
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- 需要注意预测图像为**白底黑字**,即手写公式部分为黑色,背景为白色的图片。 | ||
- 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 LaTeX-OCR 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 LaTeX-OCR,所以暂未支持 | ||
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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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<a name="4-4"></a> | ||
### 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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1. LaTeX-OCR 数据集来自于[LaTeXOCR源repo](https://github.com/lukas-blecher/LaTeX-OCR) 。 |
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