Important: if you are using NVDA 2017.3 or later on Windows 10, please consider using built-in Windows 10 OCR.

执行光学字符识别(OCR)以从无法访问的对象中提取文本。使用Tesseract OCR引擎。要执行OCR,请使用对象导航移动到相关对象,然后按NVDA + r。您可以通过转到NVDA首选项菜单并选择OCR设置来设置OCR识别语言。另外还可以从NVDA输入手势对话框的“其他”类别中重新分配键盘快捷键。

Change log:

Changes for 2.1:

  • When recognition is performed on an edit field it is now possible to navigate it with the system caret without moving focus from it and back again.
  • Tesseract release info is no longer written to the focused console.
  • When no text is recognized this fact is announced to the user.
  • It is no longer possible to attempt recognition on an invisible object.
  • WX is now used to capture images instead of Pillow.

Changes for 2.0:

  • Compatibility with NVDA 2019.3 and later.
  • It is possible to set different recognition languages for different configuration profiles.
  • OCR settings can now be changed from NVDA settings dialog rather than from a separate dialog in the tools menu.