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23.26 Chrome对PDF中图片自动OCR

Q:

从某个版本Chrome开始,会对PDF中图片自动OCR,滚动PDF时提示"Extracting textfrom PDF"。这个功能有点吓人,OCR是上传到服务器进行的还是本地离线进行的,能否避免敏感PDF泄密?OCR造成PDF滚动不畅,影响观感。如何开关此功能?

A: 2025-07-30

此功能有积极的一面。比如用Chrome查看图片扫描版电子书时,可从图片中直接复制文字出来,不必截屏后用其他OCR工具(比如微信PC版)析取文字。

暂时注意到只能对PDF进行OCR,不知能否对图片文件直接OCR,我未试成功。

此功能控制开关如下

chrome://flags/
  Make the text in PDF images interactable
    Default
    Enabled
    Disabled

或

chrome://flags/#pdf-searchify

此处说明如下

Enables a feature which runs OCR on PDF images and makes the recognized text searchable and editable. - Mac, Windows, Linux, ChromeOS

不知"editable"何解?

参看

https://source.chromium.org/chromium/chromium/src/+/main:services/screen_ai/README.md

好像前述OCR功能用到"Chrome Screen AI Library",据说是本地离线进行的,未细究。不放心时,改成"Disabled"即可。

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