Pix2Text / docs /usage.md
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# Usage
## 模型文件自动下载
首次使用 **Pix2Text** 时,系统会**自动下载**所需的开源模型,并存于 `~/.pix2text` 目录(Windows下默认路径为 `C:\Users\<username>\AppData\Roaming\pix2text`)。
CnOCR 和 CnSTD 中的模型分别存于 `~/.cnocr``~/.cnstd` 中(Windows 下默认路径为 `C:\Users\<username>\AppData\Roaming\cnocr``C:\Users\<username>\AppData\Roaming\cnstd`)。
下载过程请耐心等待,无法科学上网时系统会自动尝试其他可用站点进行下载,所以可能需要等待较长时间。
对于没有网络连接的机器,可以先把模型下载到其他机器上,然后拷贝到对应目录。
如果系统无法自动成功下载模型文件,则需要手动下载模型文件,可以参考 [huggingface.co/breezedeus](https://huggingface.co/breezedeus) ([国内镜像](https://hf-mirror.com/breezedeus))自己手动下载。
具体说明见 [模型下载](models.md)。
## 初始化
### 方法一
类 [Pix2Text](pix2text/pix_to_text.md) 是识别主类,包含了多个识别函数识别不同类型的 **图片****PDF文件** 中的内容。类 `Pix2Text` 的初始化函数如下:
```python
class Pix2Text(object):
def __init__(
self,
*,
layout_parser: Optional[LayoutParser] = None,
text_formula_ocr: Optional[TextFormulaOCR] = None,
table_ocr: Optional[TableOCR] = None,
**kwargs,
):
"""
Initialize the Pix2Text object.
Args:
layout_parser (LayoutParser): The layout parser object; default value is `None`, which means to create a default one
text_formula_ocr (TextFormulaOCR): The text and formula OCR object; default value is `None`, which means to create a default one
table_ocr (TableOCR): The table OCR object; default value is `None`, which means not to recognize tables
**kwargs (dict): Other arguments, currently not used
"""
```
其中的几个参数含义如下:
* `layout_parser`:版面分析模型对象,默认值为 `None`,表示使用默认的版面分析模型;
* `text_formula_ocr`:文字与公式识别模型对象,默认值为 `None`,表示使用默认的文字与公式识别模型;
* `table_ocr`:表格识别模型对象,默认值为 `None`,表示不识别表格;
* `**kwargs`:其他参数,目前未使用。
每个参数都有默认取值,所以可以不传入任何参数值进行初始化:`p2t = Pix2Text()`。但请注意,如果不传入任何参数值,那么只会导入默认的版面分析模型和文字与公式识别模型,而**不会导入表格识别模型**
初始化 Pix2Text 实例的更好的方法是使用以下的函数。
### 方法二
可以通过指定配置信息来初始化 `Pix2Text` 类的实例:
```python
@classmethod
def from_config(
cls,
total_configs: Optional[dict] = None,
enable_formula: bool = True,
enable_table: bool = True,
device: str = None,
**kwargs,
):
"""
Create a Pix2Text object from the configuration.
Args:
total_configs (dict): The total configuration; default value is `None`, which means to use the default configuration.
If not None, it should contain the following keys:
* `layout`: The layout parser configuration
* `text_formula`: The TextFormulaOCR configuration
* `table`: The table OCR configuration
enable_formula (bool): Whether to enable formula recognition; default value is `True`
enable_table (bool): Whether to enable table recognition; default value is `True`
device (str): The device to run the model; optional values are 'cpu', 'gpu' or 'cuda';
default value is `None`, which means to select the device automatically
**kwargs (dict): Other arguments
Returns: a Pix2Text object
"""
```
其中的几个参数含义如下:
* `total_configs`:总配置,包含以下几个键值:
- `layout`:版面分析模型的配置;
- `text_formula`:文字与公式识别模型的配置;
- `table`:表格识别模型的配置;
默认值为 `None`,表示使用默认配置。
* `enable_formula`:是否启用公式识别,默认值为 `True`
* `enable_table`:是否启用表格识别,默认值为 `True`
* `device`:运行模型的设备,可选值为 `'cpu'`, `'gpu'``'cuda'`,默认值为 `None`,表示自动选择设备;
* `**kwargs`:其他参数,目前未使用。
这个函数的返回值是一个 `Pix2Text` 类的实例,可以直接使用这个实例进行识别。
推荐使用此函数初始化 Pix2Text 的实例,如:`p2t = Pix2Text.from_config()`
一个包含配置信息的示例如下:
```python
import os
from pix2text import Pix2Text
text_formula_config = dict(
languages=('en', 'ch_sim'), # 设置识别的语言
mfd=dict( # 声明 MFD 的初始化参数
model_path=os.path.expanduser(
'~/.pix2text/1.1/mfd-onnx/mfd-v20240618.onnx'
), # 注:修改成你的模型文件所存储的路径
),
formula=dict(
model_name='mfr-pro',
model_backend='onnx',
model_dir=os.path.expanduser(
'~/.pix2text/1.1/mfr-pro-onnx'
), # 注:修改成你的模型文件所存储的路径
),
text=dict(
rec_model_name='doc-densenet_lite_666-gru_large',
rec_model_backend='onnx',
rec_model_fp=os.path.expanduser(
'~/.cnocr/2.3/doc-densenet_lite_666-gru_large/cnocr-v2.3-doc-densenet_lite_666-gru_large-epoch=005-ft-model.onnx'
# noqa
), # 注:修改成你的模型文件所存储的路径
),
)
total_config = {
'layout': {'scores_thresh': 0.45},
'text_formula': text_formula_config,
}
p2t = Pix2Text.from_config(total_configs=total_config)
```
使用 VLM API 做文字和公式识别的示例如下:
```python
import os
from pix2text import Pix2Text
model_name=os.getenv("GEMINI_MODEL") # "gemini/gemini-2.0-flash-lite"
api_key=os.getenv("GEMINI_API_KEY") # "<your-api-key>"
total_config = {
'layout': None,
'text_formula': {
"model_type": "VlmTextFormulaOCR", # 指定类名
"model_name": model_name,
"api_key": api_key,
},
"table": {
"model_type": "VlmTableOCR", # 指定类名
"model_name": model_name,
"api_key": api_key,
},
}
p2t = Pix2Text.from_config(total_configs=total_config)
```
`model_name``api_key` 的取值,具体可参考 [LiteLLM 文档](https://docs.litellm.ai/docs/)。
更多初始化的示例请参见 [tests/test_pix2text.py](https://github.com/breezedeus/Pix2Text/blob/main/tests/test_pix2text.py)。
## 各种识别接口
`Pix2Text` 提供了不同的识别函数来识别不同类似的图片或者 PDF 文件内容,下面分别说明。
### 1. 函数 `.recognize_pdf()`
此函数用于识别一整个 PDF 文件中的内容。**PDF 文件的内容可以只包含图片而无文字内容**
如示例文件 [examples/test-doc.pdf](examples/test-doc.pdf)。
识别时,可以指定识别的页数,也可以指定识别的 PDF 文件编号。
函数定义如下:
```python
def recognize_pdf(
self,
pdf_fp: Union[str, Path],
pdf_number: int = 0,
pdf_id: Optional[str] = None,
page_numbers: Optional[List[int]] = None,
**kwargs,
) -> Document:
"""
recognize a pdf file
Args:
pdf_fp (Union[str, Path]): pdf file path
pdf_number (int): pdf number
pdf_id (str): pdf id
page_numbers (List[int]): page numbers to recognize; default is `None`, which means to recognize all pages
kwargs (dict): Optional keyword arguments. The same as `recognize_page`
Returns: a Document object. Use `doc.to_markdown('output-dir')` to get the markdown output of the recognized document.
"""
```
**函数说明**
* 输入参数 `pdf_fp`:PDF 文件的路径;
* 输入参数 `pdf_number`:PDF 文件的编号,默认值为 `0`
* 输入参数 `pdf_id`:PDF 文件的 ID,默认值为 `None`
* 输入参数 `page_numbers`:需要识别的页码列表(页码从 0 开始计数,如 `[0, 1]` 表示只识别文件的第 1、2 页内容),默认值为 `None`,表示识别所有页;
* 输入参数 `**kwargs`:其他参数,具体说明参考下面的函数 `recognize_page()`
**返回值**:返回一个 `Document` 对象,可以使用 `doc.to_markdown('output-dir')` 来获取识别结果的 markdown 输出。
**调用示例**
```python
from pix2text import Pix2Text
img_fp = 'examples/test-doc.pdf'
p2t = Pix2Text.from_config()
out_md = p2t.recognize_pdf(
img_fp,
page_numbers=[0, 1],
table_as_image=True,
save_debug_res=f'./output-debug',
)
out_md.to_markdown('output-pdf-md')
```
### 2. 函数 `.recognize_page()`
此函数用于识别一张包含复杂排版的页面图片中的内容。图片可以包含多列、图片、表格等内容,如示例图片 [examples/page2.png](examples/page2.png)。
函数定义如下:
```python
def recognize_page(
self,
img: Union[str, Path, Image.Image],
page_number: int = 0,
page_id: Optional[str] = None,
**kwargs,
) -> Page:
"""
Analyze the layout of the image, and then recognize the information contained in each section.
Args:
img (str or Image.Image): an image path, or `Image.Image` loaded by `Image.open()`
page_number (str): page number; default value is `0`
page_id (str): page id; default value is `None`, which means to use the `str(page_number)`
kwargs ():
* resized_shape (int): Resize the image width to this size for processing; default value is `768`
* mfr_batch_size (int): batch size for MFR; When running on GPU, this value is suggested to be set to greater than 1; default value is `1`
* embed_sep (tuple): Prefix and suffix for embedding latex; only effective when `return_text` is `True`; default value is `(' $', '$ ')`
* isolated_sep (tuple): Prefix and suffix for isolated latex; only effective when `return_text` is `True`; default value is two-dollar signs
* line_sep (str): The separator between lines of text; only effective when `return_text` is `True`; default value is a line break
* auto_line_break (bool): Automatically line break the recognized text; only effective when `return_text` is `True`; default value is `True`
* det_text_bbox_max_width_expand_ratio (float): Expand the width of the detected text bbox. This value represents the maximum expansion ratio above and below relative to the original bbox height; default value is `0.3`
* det_text_bbox_max_height_expand_ratio (float): Expand the height of the detected text bbox. This value represents the maximum expansion ratio above and below relative to the original bbox height; default value is `0.2`
* embed_ratio_threshold (float): The overlap threshold for embed formulas and text lines; default value is `0.6`.
When the overlap between an embed formula and a text line is greater than or equal to this threshold,
the embed formula and the text line are considered to be on the same line;
otherwise, they are considered to be on different lines.
* table_as_image (bool): If `True`, the table will be recognized as an image (don't parse the table content as text) ; default value is `False`
* title_contain_formula (bool): If `True`, the title of the page will be recognized as a mixed image (text and formula). If `False`, it will be recognized as a text; default value is `False`
* text_contain_formula (bool): If `True`, the text of the page will be recognized as a mixed image (text and formula). If `False`, it will be recognized as a text; default value is `True`
* formula_rec_kwargs (dict): generation arguments passed to formula recognizer `latex_ocr`; default value is `{}`
* save_debug_res (str): if `save_debug_res` is set, the directory to save the debug results; default value is `None`, which means not to save
Returns: a Page object. Use `page.to_markdown('output-dir')` to get the markdown output of the recognized page.
"""
```
**函数说明**
* 输入参数 `img`:图片路径或者 `Image.Image` 对象;
* 输入参数 `page_number`:页码,默认值为 `0`
* 输入参数 `page_id`:页码 ID,默认值为 `None`,此时会使用 `str(page_number)` 作为其取值;
* kwargs:其他参数,具体说明如下:
- `resized_shape`:调整图片的宽度为此大小以进行处理,默认值为 `768`
- `mfr_batch_size`:MFR 预测时使用的批大小;在 GPU 上运行时,建议将此值设置为大于 `1`;默认值为 `1`
- `embed_sep`:嵌入 LaTeX 的前缀和后缀;仅在 `return_text``True` 时有效;默认值为 `(' $', '$ ')`
- `isolated_sep`:孤立 LaTeX 的前缀和后缀;仅在 `return_text``True` 时有效;默认值为两个美元符号;
- `line_sep`:文本行之间的分隔符;仅在 `return_text``True` 时有效;默认值为换行符;
- `auto_line_break`:自动换行识别的文本;仅在 `return_text``True` 时有效;默认值为 `True`
- `det_text_bbox_max_width_expand_ratio`:扩展检测文本框的宽度。此值表示相对于原始框高度的最大扩展比率;默认值为 `0.3`
- `det_text_bbox_max_height_expand_ratio`:扩展检测文本框的高度。此值表示相对于原始框高度的最大扩展比率;默认值为 `0.2`
- `embed_ratio_threshold`:嵌入公式和文本行之间的重叠阈值;默认值为 `0.6`。当嵌入公式和文本行之间的重叠大于或等于此阈值时,认为嵌入公式和文本行在同一行;否则,认为它们在不同行
- `table_as_image`:如果为 `True`,则将表格识别为图像(不将表格内容解析为文本);默认值为 `False`
- `title_contain_formula`:如果为 `True`,则将页面标题作为为混合图像(文本和公式)进行识别。如果为 `False`,则将其作为文本图片进行识别(不识别公式);默认值为 `False`
- `text_contain_formula`:如果为 `True`,则将页面文本作为混合图像(文本和公式)进行识别。如果为 `False`,则将其作为文本进行识别(不识别公式);默认值为 `True`
- `formula_rec_kwargs`:传递给公式识别器 `latex_ocr` 的生成参数;默认值为 `{}`
- `save_debug_res`:如果设置了 `save_debug_res`,则把各种中间的解析结果存入此目录以便于调试;默认值为 `None`,表示不保存
**返回值**:返回一个 `Page` 对象,可以使用 `page.to_markdown('output-dir')` 来获取识别结果的 markdown 输出。
**调用示例**
```python
from pix2text import Pix2Text
img_fp = 'examples/page2.png'
p2t = Pix2Text.from_config()
out_page = p2t.recognize_page(
img_fp,
title_contain_formula=False,
text_contain_formula=False,
save_debug_res=f'./output-debug',
)
out_page.to_markdown('output-page-md')
```
### 3. 函数 `.recognize_text_formula()`
此函数用于识别一张包含文字和公式的图片(如段落截图)中的内容,如示例图片 [examples/mixed.jpg](examples/mixed.jpg)。
函数定义如下:
```python
def recognize_text_formula(
self, img: Union[str, Path, Image.Image], return_text: bool = True, **kwargs,
) -> Union[str, List[str], List[Any], List[List[Any]]]:
"""
Analyze the layout of the image, and then recognize the information contained in each section.
Args:
img (str or Image.Image): an image path, or `Image.Image` loaded by `Image.open()`
return_text (bool): Whether to return the recognized text; default value is `True`
kwargs ():
* resized_shape (int): Resize the image width to this size for processing; default value is `768`
* save_analysis_res (str): Save the mfd result image in this file; default is `None`, which means not to save
* mfr_batch_size (int): batch size for MFR; When running on GPU, this value is suggested to be set to greater than 1; default value is `1`
* embed_sep (tuple): Prefix and suffix for embedding latex; only effective when `return_text` is `True`; default value is `(' $', '$ ')`
* isolated_sep (tuple): Prefix and suffix for isolated latex; only effective when `return_text` is `True`; default value is two-dollar signs
* line_sep (str): The separator between lines of text; only effective when `return_text` is `True`; default value is a line break
* auto_line_break (bool): Automatically line break the recognized text; only effective when `return_text` is `True`; default value is `True`
* det_text_bbox_max_width_expand_ratio (float): Expand the width of the detected text bbox. This value represents the maximum expansion ratio above and below relative to the original bbox height; default value is `0.3`
* det_text_bbox_max_height_expand_ratio (float): Expand the height of the detected text bbox. This value represents the maximum expansion ratio above and below relative to the original bbox height; default value is `0.2`
* embed_ratio_threshold (float): The overlap threshold for embed formulas and text lines; default value is `0.6`.
When the overlap between an embed formula and a text line is greater than or equal to this threshold,
the embed formula and the text line are considered to be on the same line;
otherwise, they are considered to be on different lines.
* table_as_image (bool): If `True`, the table will be recognized as an image; default value is `False`
* formula_rec_kwargs (dict): generation arguments passed to formula recognizer `latex_ocr`; default value is `{}`
Returns: a str when `return_text` is `True`; or a list of ordered (top to bottom, left to right) dicts when `return_text` is `False`,
with each dict representing one detected box, containing keys:
* `type`: The category of the image; Optional: 'text', 'isolated', 'embedding'
* `text`: The recognized text or Latex formula
* `score`: The confidence score [0, 1]; the higher, the more confident
* `position`: Position information of the block, `np.ndarray`, with shape of [4, 2]
* `line_number`: The line number of the box (first line `line_number==0`), boxes with the same value indicate they are on the same line
"""
```
**函数说明**
* 输入参数 `img`:图片路径或者 `Image.Image` 对象;
* 输入参数 `return_text`:是否返回纯文本;取值为 `False` 时返回带有结构化信息的 list;默认值为 `True`
* 输入参数 `kwargs`:其他参数,具体说明如下:
- `resized_shape`:调整图片的宽度为此大小以进行处理,默认值为 `768`
- `save_analysis_res`:保存 MFD 解析结果图像的文件名;默认值为 `None`,表示不保存;
- `mfr_batch_size`:MFR 预测时使用的批大小;在 GPU 上运行时,建议将此值设置为大于 `1`;默认值为 `1`
- `embed_sep`:嵌入 LaTeX 的前缀和后缀;仅在 `return_text``True` 时有效;默认值为 `(' $', '$ ')`
- `isolated_sep`:孤立 LaTeX 的前缀和后缀;仅在 `return_text``True` 时有效;默认值为两个美元符号;
- `line_sep`:文本行之间的分隔符;仅在 `return_text``True` 时有效;默认值为换行符;
- `auto_line_break`:自动换行识别的文本;仅在 `return_text``True` 时有效;默认值为 `True`
- `det_text_bbox_max_width_expand_ratio`:扩展检测文本框的宽度。此值表示相对于原始框高度的最大扩展比率;默认值为 `0.3`
- `det_text_bbox_max_height_expand_ratio`:扩展检测文本框的高度。此值表示相对于原始框高度的最大扩展比率;默认值为 `0.2`
- `embed_ratio_threshold`:嵌入公式和文本行之间的重叠阈值;默认值为 `0.6`。当嵌入公式和文本行之间的重叠大于或等于此阈值时,认为嵌入公式和文本行在同一行;否则,认
- `table_as_image`:如果为 `True`,则将表格识别为图像;默认值为 `False`
- `formula_rec_kwargs`:传递给公式识别器 `latex_ocr` 的生成参数;默认值为 `{}`
**返回值**:当 `return_text``True` 时,返回一个字符串;当 `return_text``False` 时,返回一个有序的(从上到下,从左到右)字典列表,每个字典表示一个检测框,包含以下键值:
- `type`:图像的类别;可选值:'text'、'isolated'、'embedding'
- `text`:识别的文本或 LaTeX 公式
- `score`:置信度分数 [0, 1];分数越高,置信度越高
- `position`:块的位置信息,`np.ndarray`,形状为 `[4, 2]`
- `line_number`:框的行号(第一行 `line_number==0`),具有相同值的框表示它们在同一行
**调用示例**
```python
from pix2text import Pix2Text
img_fp = 'examples/mixed.jpg'
p2t = Pix2Text.from_config()
out = p2t.recognize_text_formula(
img_fp,
save_analysis_res=f'./output-debug',
)
```
### 4. 函数 `.recognize_formula()`
此函数用于识别一张纯公式的图片中的内容,如示例图片 [examples/formula2.png](examples/formula2.png)。
函数定义如下:
```python
def recognize_formula(
self,
imgs: Union[str, Path, Image.Image, List[str], List[Path], List[Image.Image]],
batch_size: int = 1,
return_text: bool = True,
rec_config: Optional[dict] = None,
**kwargs,
) -> Union[str, List[str], Dict[str, Any], List[Dict[str, Any]]]:
"""
Recognize pure Math Formula images to LaTeX Expressions
Args:
imgs (Union[str, Path, Image.Image, List[str], List[Path], List[Image.Image]): The image or list of images
batch_size (int): The batch size
return_text (bool): Whether to return only the recognized text; default value is `True`
rec_config (Optional[dict]): The config for recognition
**kwargs (): Special model parameters. Not used for now
Returns: The LaTeX Expression or list of LaTeX Expressions;
str or List[str] when `return_text` is True;
Dict[str, Any] or List[Dict[str, Any]] when `return_text` is False, with the following keys:
* `text`: The recognized LaTeX text
* `score`: The confidence score [0, 1]; the higher, the more confident
"""
```
**函数说明**
* 输入参数 `imgs`:图片路径或者 `Image.Image` 对象,或者图片路径或者 `Image.Image` 对象的列表;
* 输入参数 `batch_size`:批大小,默认值为 `1`
* 输入参数 `return_text`:是否返回纯文本;取值为 `False` 时返回带有结构化信息的 list;默认值为 `True`
* 输入参数 `rec_config`:识别配置,可选值;
* 输入参数 `kwargs`:其他参数,目前未使用。
**返回值**:当 `return_text``True` 时,返回一个字符串;当 `return_text``False` 时,返回一个有序的(从上到下,从左到右)字典列表,每个字典表示一个检测框,包含以下键值:
- `text`:识别的 LaTeX 文本
- `score`:置信度分数 [0, 1];分数越高,置信度越高
**调用示例**
```python
from pix2text import Pix2Text
img_fp = 'examples/formula2.png'
p2t = Pix2Text.from_config()
out = p2t.recognize_formula(
img_fp,
save_analysis_res=f'./output-debug',
)
```
### 5. 函数 `.recognize_text()`
此函数用于识别一张纯文字的图片中的内容,如示例图片 [examples/general.jpg](examples/general.jpg)。
函数定义如下:
```python
def recognize_text(
self,
imgs: Union[str, Path, Image.Image, List[str], List[Path], List[Image.Image]],
return_text: bool = True,
rec_config: Optional[dict] = None,
**kwargs,
) -> Union[str, List[str], List[Any], List[List[Any]]]:
"""
Recognize a pure Text Image.
Args:
imgs (Union[str, Path, Image.Image], List[str], List[Path], List[Image.Image]): The image or list of images
return_text (bool): Whether to return only the recognized text; default value is `True`
rec_config (Optional[dict]): The config for recognition
kwargs (): Other parameters for `text_ocr.ocr()`
Returns: Text str or list of text strs when `return_text` is True;
`List[Any]` or `List[List[Any]]` when `return_text` is False, with the same length as `imgs` and the following keys:
* `position`: Position information of the block, `np.ndarray`, with a shape of [4, 2]
* `text`: The recognized text
* `score`: The confidence score [0, 1]; the higher, the more confident
"""
```
**函数说明**
* 输入参数 `imgs`:图片路径或者 `Image.Image` 对象,或者图片路径或者 `Image.Image` 对象的列表;
* 输入参数 `return_text`:是否返回纯文本;取值为 `False` 时返回带有结构化信息的 list;默认值为 `True`
* 输入参数 `rec_config`:识别配置,可选值;
* 输入参数 `kwargs`:其他参数,具体说明参考函数 `text_ocr.ocr()`
**返回值**:当 `return_text``True` 时,返回一个字符串;当 `return_text``False` 时,返回一个有序的(从上到下,从左到右)字典列表,每个字典表示一个检测框,包含以下键值:
- `position`:块的位置信息,`np.ndarray`,形状为 `[4, 2]`
- `text`:识别的文本
- `score`:置信度分数 [0, 1];分数越高,置信度越高
**调用示例**
```python
from pix2text import Pix2Text
img_fp = 'examples/general.jpg'
p2t = Pix2Text.from_config()
out = p2t.recognize_text(img_fp)
```
### 6. 函数 `.recognize()`
是不是觉得上面的接口太丰富了,使用起来有点麻烦?没关系,这个函数可以根据指定的图片类型调用上面的不同函数进行识别。
```python
def recognize(
self,
img: Union[str, Path, Image.Image],
file_type: Literal[
'pdf', 'page', 'text_formula', 'formula', 'text'
] = 'text_formula',
**kwargs,
) -> Union[Document, Page, str, List[str], List[Any], List[List[Any]]]:
"""
Recognize the content of the image or pdf file according to the specified type.
It will call the corresponding recognition function `.recognize_{file_type}()` according to the `file_type`.
Args:
img (Union[str, Path, Image.Image]): The image/pdf file path or `Image.Image` object
file_type (str): Supported image types: 'pdf', 'page', 'text_formula', 'formula', 'text'
**kwargs (dict): Arguments for the corresponding recognition function
Returns: recognized results
"""
```
**函数说明**
* 输入参数 `img`:图片/PDF文件路径或者 `Image.Image` 对象;
* 输入参数 `file_type`:图片类型,可选值为 `'pdf'`, `'page'`, `'text_formula'`, `'formula'`, `'text'`
* 输入参数 `kwargs`:其他参数,具体说明参考上面的函数。
**返回值**:根据 `file_type` 的不同,返回不同的结果。具体说明参考上面的函数。
**调用示例**
```python
from pix2text import Pix2Text
img_fp = 'examples/general.jpg'
p2t = Pix2Text.from_config()
out = p2t.recognize(img_fp, file_type='text') # 等价于 p2t.recognize_text(img_fp)
```
更多使用示例请参见 [tests/test_pix2text.py](https://github.com/breezedeus/Pix2Text/blob/main/tests/test_pix2text.py)。