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https://activity.huaweicloud.com/ocr-promotion-plan.html?utm_source=qihu-ei&utm_medium=se-cpc-op&utm_campaign=EI-文字识别OCR&utm_content=文字识别OCR&utm_term=ocr%e8%af%86%e5%88%ab
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https://blog.csdn.net/striving1234/article/details/78086184
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https://www.jianshu.com/p/0a3386227981
营业执照识别/营业执照OCR识别API_weixin_33873846的博客-CSDN博客_阿里ocr识别营业照
https://blog.csdn.net/weixin_33873846/article/details/92248627
ocr识别平大安 - 知乎
https://www.zhihu.com/people/18565284948
原文：https://www.cnblogs.com/rgqancy/p/13185855.html