captcha - 一个词recaptcha？

Question

你好，我看到 facebook 在使用 recaptcha，但在他们的注册页面中，他们可以显示一个单词而不是两个，然后我注意到 repcatcha 只验证第一个单词，第二个单词充当虚拟词，问题是我们能否以某种方式告诉 recaptcha 只显示一个词？而不是两个？

Answer 1

No .

But if a computer can't read such a CAPTCHA, how does the system know the correct answer to the puzzle? Here's how: Each new word that cannot be read correctly by OCR is given to a user in conjunction with another word for which the answer is already known. The user is then asked to read both words. If they solve the one for which the answer is known, the system assumes their answer is correct for the new one. The system then gives the new image to a number of other people to determine, with higher confidence, whether the original answer was correct.