网上资料太多，把无效的去除，整理的有用的代码链接。

 

https://github.com/20km-shimakaze/Identify_answer_cards/tree/master

https://github.com/leeguandong/Answer_card_identification

https://github.com/Wasim37/answer_card_detection

https://github.com/StuOfBupt/DetectAnswer

https://github.com/changzhn/answer-card