Translated from Simplified Chinese by AI.Read the original
Actually, this idea came to me after seeing Baidu's rotation CAPTCHA. Rotation CAPTCHAs are easy for the server to generate and easy for humans to recognize, but a computer probably has no way of dealing with them other than collecting all the CAPTCHA images or using machine learning.
Right now I've only made a concept: No longer available — I didn't have the money to renew the domain
The current hue CAPTCHA is handled entirely in the browser, with no backend.. So, for reference only...
As for the backend, it's impossible to finish it anytime soon. The school notified us that classes start on April 7..
Digging a hole (