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有没有反 OCR 的轮子？
source link: https://www.v2ex.com/t/640978
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奇思妙想 - @yohanechan - 社交软件会 OCR 用户上传的图片，检测图片中的文字，发现敏感词将会拦截。是否可以用验证码的思路，在图片中加入噪点、干扰元素、扭曲字体，使机器难以识别，但人类仍然能认出其中的文字。
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