2021-12-13 17:31:57 +08:00
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# PP-Structure 快速开始
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2022-04-18 15:28:22 +08:00
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- [1. 安装依赖包](#1)
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- [2. 便捷使用](#2)
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- [2.1 命令行使用](#21)
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- [2.1.1 版面分析+表格识别](#211)
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- [2.1.2 DocVQA](#212)
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- [2.2 Python脚本使用](#22)
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- [2.2.1 版面分析+表格识别](#221)
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- [2.2.2 DocVQA](#222)
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- [2.3 返回结果说明](#23)
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- [2.3.1 版面分析+表格识别](#231)
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- [2.3.2 DocVQA](#232)
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- [2.4 参数说明](#24)
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<a name="1"></a>
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2021-12-13 17:31:57 +08:00
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## 1. 安装依赖包
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```bash
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# 安装 paddleocr,推荐使用2.3.0.2+版本
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pip3 install "paddleocr>=2.3.0.2"
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# 安装 版面分析依赖包layoutparser(如不需要版面分析功能,可跳过)
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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 DocVQA依赖包paddlenlp(如不需要DocVQA功能,可跳过)
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pip install paddlenlp
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```
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2022-04-18 15:28:22 +08:00
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<a name="2"></a>
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2021-12-13 17:31:57 +08:00
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## 2. 便捷使用
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2022-04-18 15:28:22 +08:00
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<a name="21"></a>
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### 2.1 命令行使用
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<a name="211"></a>
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#### 2.1.1 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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2022-04-18 15:28:22 +08:00
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<a name="212"></a>
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#### 2.1.2 DocVQA
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2022-01-11 16:04:24 +08:00
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请参考:[文档视觉问答](../vqa/README.md)。
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2022-04-18 15:28:22 +08:00
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<a name="22"></a>
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2021-12-13 17:31:57 +08:00
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### 2.2 Python脚本使用
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2022-04-18 15:28:22 +08:00
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<a name="221"></a>
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#### 2.2.1 版面分析+表格识别
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2021-12-13 17:31:57 +08:00
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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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2022-04-18 15:28:22 +08:00
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<a name="222"></a>
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#### 2.2.2 DocVQA
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2022-01-11 16:04:24 +08:00
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请参考:[文档视觉问答](../vqa/README.md)。
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<a name="23"></a>
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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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2022-04-18 15:28:22 +08:00
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<a name="231"></a>
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#### 2.3.1 版面分析+表格识别
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2021-12-13 17:31:57 +08:00
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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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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文件和图片名为表格在图片里的坐标。
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```
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/output/table/1/
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└─ res.txt
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└─ [454, 360, 824, 658].xlsx 表格识别结果
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└─ [16, 2, 828, 305].jpg 被裁剪出的图片区域
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└─ [17, 361, 404, 711].xlsx 表格识别结果
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```
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<a name="232"></a>
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#### 2.3.2 DocVQA
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2021-12-13 17:31:57 +08:00
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2022-01-11 16:04:24 +08:00
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请参考:[文档视觉问答](../vqa/README.md)。
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2021-12-13 17:31:57 +08:00
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2022-04-18 15:39:57 +08:00
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<a name="24"></a>
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2021-12-13 17:31:57 +08:00
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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_dict_path | 表格结构模型所用字典地址 | ../ppocr/utils/dict/table_structure_dict.txt |
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| layout_path_model | 版面分析模型模型地址,可以为在线地址或者本地地址,当为本地地址时,需要指定 layout_label_map, 命令行模式下可通过--layout_label_map='{0: "Text", 1: "Title", 2: "List", 3:"Table", 4:"Figure"}' 指定 | lp://PubLayNet/ppyolov2_r50vd_dcn_365e_publaynet/config |
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| layout_label_map | 版面分析模型模型label映射字典 | None |
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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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