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								# PP-Structure 快速开始
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								- [PP-Structure 快速开始](#pp-structure-快速开始)
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								  - [1. 安装依赖包](#1-安装依赖包)
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								  - [2. 便捷使用](#2-便捷使用)
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								    - [2.1 命令行使用](#21-命令行使用)
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								    - [2.2 Python脚本使用](#22-python脚本使用)
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								    - [2.3 返回结果说明](#23-返回结果说明)
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								    - [2.4 参数说明](#24-参数说明)
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								  - [3. Python脚本使用](#3-python脚本使用)
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								## 1. 安装依赖包
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								```bash
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								pip install "paddleocr>=2.3.0.2" # 推荐使用2.3.0.2+版本
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								pip3 install -U https://paddleocr.bj.bcebos.com/whl/layoutparser-0.0.0-py3-none-any.whl
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								# 安装 PaddleNLP
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								git clone https://github.com/PaddlePaddle/PaddleNLP -b develop
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								cd PaddleNLP
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								pip3 install -e .
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								```
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								## 2. 便捷使用
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								### 2.1 命令行使用
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								* 版面分析+表格识别
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								```bash
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								paddleocr --image_dir=../doc/table/1.png --type=structure
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								```
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								* VQA
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								请参考:[文档视觉问答](../vqa/README.md)。
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								### 2.2 Python脚本使用
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								* 版面分析+表格识别
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								```python
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								import os
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								import cv2
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								from paddleocr import PPStructure,draw_structure_result,save_structure_res
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								table_engine = PPStructure(show_log=True)
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								save_folder = './output/table'
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								img_path = '../doc/table/1.png'
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								img = cv2.imread(img_path)
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								result = table_engine(img)
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								save_structure_res(result, save_folder,os.path.basename(img_path).split('.')[0])
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								for line in result:
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								    line.pop('img')
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								    print(line)
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								from PIL import Image
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								font_path = '../doc/fonts/simfang.ttf' # PaddleOCR下提供字体包
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								image = Image.open(img_path).convert('RGB')
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								im_show = draw_structure_result(image, result,font_path=font_path)
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								im_show = Image.fromarray(im_show)
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								im_show.save('result.jpg')
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								```
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								* VQA
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								请参考:[文档视觉问答](../vqa/README.md)。
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								### 2.3 返回结果说明
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								PP-Structure的返回结果为一个dict组成的list,示例如下
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								* 版面分析+表格识别
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								```shell
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								[
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								  {   'type': 'Text',
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								      'bbox': [34, 432, 345, 462],
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								      'res': ([[36.0, 437.0, 341.0, 437.0, 341.0, 446.0, 36.0, 447.0], [41.0, 454.0, 125.0, 453.0, 125.0, 459.0, 41.0, 460.0]],
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								                [('Tigure-6. The performance of CNN and IPT models using difforen', 0.90060663), ('Tent  ', 0.465441)])
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								  }
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								]
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								```
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								dict 里各个字段说明如下
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								| 字段            | 说明           |
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								| --------------- | -------------|
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								|type|图片区域的类型|
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								|bbox|图片区域的在原图的坐标,分别[左上角x,左上角y,右下角x,右下角y]|
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								|res|图片区域的OCR或表格识别结果。<br> 表格: 表格的HTML字符串; <br> OCR: 一个包含各个单行文字的检测坐标和识别结果的元组|
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								* VQA
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								请参考:[文档视觉问答](../vqa/README.md)。
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								### 2.4 参数说明
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								| 字段            | 说明                                     | 默认值                                      |
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								| --------------- | ---------------------------------------- | ------------------------------------------- |
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								| output          | excel和识别结果保存的地址                | ./output/table                              |
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								| table_max_len   | 表格结构模型预测时,图像的长边resize尺度 | 488                                         |
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								| table_model_dir | 表格结构模型 inference 模型地址          | None                                        |
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								| table_char_type | 表格结构模型所用字典地址                 | ../ppocr/utils/dict/table_structure_dict.txt |
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								| model_name_or_path | VQA SER模型地址                | None |
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								| max_seq_length | VQA SER模型最大支持token长度              | 512 |
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								| label_map_path | VQA SER 标签文件地址              | ./vqa/labels/labels_ser.txt |
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								| mode | pipeline预测模式,structure: 版面分析+表格识别; VQA: SER文档信息抽取              | structure |
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								大部分参数和PaddleOCR whl包保持一致,见 [whl包文档](../../doc/doc_ch/whl.md)
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								运行完成后,每张图片会在`output`字段指定的目录下有一个同名目录,图片里的每个表格会存储为一个excel,图片区域会被裁剪之后保存下来,excel文件和图片名名为表格在图片里的坐标。
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								## 3. Python脚本使用
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								* 版面分析+表格识别
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											2021-12-14 12:16:52 +00:00
										 
									 
								 
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								```bash
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								cd ppstructure
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								# 下载模型
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								mkdir inference && cd inference
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								# 下载PP-OCRv2文本检测模型并解压
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								wget https://paddleocr.bj.bcebos.com/PP-OCRv2/chinese/ch_PP-OCRv2_det_slim_quant_infer.tar && tar xf ch_PP-OCRv2_det_slim_quant_infer.tar
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								# 下载PP-OCRv2文本识别模型并解压
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								wget https://paddleocr.bj.bcebos.com/PP-OCRv2/chinese/ch_PP-OCRv2_rec_slim_quant_infer.tar && tar xf ch_PP-OCRv2_rec_slim_quant_infer.tar
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								# 下载超轻量级英文表格预测模型并解压
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								wget https://paddleocr.bj.bcebos.com/dygraph_v2.0/table/en_ppocr_mobile_v2.0_table_structure_infer.tar && tar xf en_ppocr_mobile_v2.0_table_structure_infer.tar
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								cd ..
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								python3 predict_system.py --det_model_dir=inference/ch_PP-OCRv2_det_slim_quant_infer \
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								                          --rec_model_dir=inference/ch_PP-OCRv2_rec_slim_quant_infer \
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								                          --table_model_dir=inference/en_ppocr_mobile_v2.0_table_structure_infer \
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								                          --image_dir=../doc/table/1.png \
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								                          --rec_char_dict_path=../ppocr/utils/ppocr_keys_v1.txt \
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								                          --table_char_dict_path=../ppocr/utils/dict/table_structure_dict.txt \
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								                          --output=../output/table \
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								                          --vis_font_path=../doc/fonts/simfang.ttf
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								```
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								运行完成后,每张图片会在`output`字段指定的目录下的`talbe`目录下有一个同名目录,图片里的每个表格会存储为一个excel,图片区域会被裁剪之后保存下来,excel文件和图片名名为表格在图片里的坐标。
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								* VQA
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											2021-12-14 12:16:52 +00:00
										 
									 
								 
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								```bash
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								cd ppstructure
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								# 下载模型
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								mkdir inference && cd inference
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								# 下载SER xfun 模型并解压
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								wget https://paddleocr.bj.bcebos.com/pplayout/PP-Layout_v1.0_ser_pretrained.tar && tar xf PP-Layout_v1.0_ser_pretrained.tar
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								cd ..
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								python3 predict_system.py --model_name_or_path=vqa/PP-Layout_v1.0_ser_pretrained/ \
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								                          --mode=vqa \
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								                          --image_dir=vqa/images/input/zh_val_0.jpg  \
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								                          --vis_font_path=../doc/fonts/simfang.ttf
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								```
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								运行完成后,每张图片会在`output`字段指定的目录下的`vqa`目录下存放可视化之后的图片,图片名和输入图片名一致。
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