阿里
https://data.aliyun.com/ai#/ocr-other
https://market.console.aliyun.com/imageconsole/index.htm?#/bizlist?_k=jd8xq7
https://market.aliyun.com/products/57124001/cmapi024968.html#sku=yuncode1896800000
https://market.aliyun.com/products/?spm=a2c0j.10558532.demo1.9.2f384b0fpWsW32&keywords=%E5%8D%B0%E5%88%B7%E6%96%87%E5%AD%97%E8%AF%86%E5%88%AB
https://duguang.aliyun.com/experience?spm=5176.12127997.1248157.2.4d9d70edM5bp5V&type=doc&midtype=fulldoc&subtype=general
https://market.aliyun.com/products/57124001/cmapi024968.html?spm=5176.2020520132.101.2.72c47218kknlJo#sku=yuncode1896800000
百度
https://ai.baidu.com/docs#/OCR-API-TableAsyn/d24897db
原文：https://www.cnblogs.com/du-jun/p/11822091.html