pdf中的部分希腊字母没有识别出来，识别成了？？？

[zgpnuaa]

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Description of the bug | 错误描述

这些字母都很常见，但是却没识别出来

How to reproduce the bug | 如何复现

这是pdf原件 papaer.pdf
这是识别后的markdown文件 paper.md

Operating System Mode | 操作系统类型

Windows

Operating System Version| 操作系统版本

windows

Python version | Python 版本

3.11

Software version | 软件版本 (mineru --version)

>=2.5

Backend name | 解析后端

vlm

Device mode | 设备模式

cuda

[myhloli]

勾选开启ocr开关即可