PPOCRLabel 安装报错解决办法

问题描述：

在使用工具PPOCRLabel进行图片标注，在运行PPOCRLabel时报错信息如下：

QObject::moveToThread: Current thread (0x3331c30) is not the object's thread (0x2c2f860).
Cannot move to target thread (0x3331c30)

qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "/usr/local/lib/python3.6/dist-packages/cv2/qt/plugins" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: xcb, eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-glx, webgl.

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C++ Traceback (most recent call last):
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No stack trace in paddle, may be caused by external reasons.

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Error Message Summary:
----------------------
FatalError: `Process abort signal` is detected by the operating system.
  [TimeInfo: *** Aborted at 1643271565 (unix time) try "date -d @1643271565" if you are using GNU date ***]
  [SignalInfo: *** SIGABRT (@0x3e800002a8e) received by PID 10894 (TID 0x7f6ac80ec740) from PID 10894 ***]

已放弃 (核心已转储)
 

解决办法：

降低 opencv-python版本，从4.4版本降低到4.2版本，解决了问题：

sudo pip3 install --upgrade opencv-python==4.2.0.32

重新运行PPOCRLabel：

PPOCRLabel --lang ch

 安装成功