an offline ocr tool named bibiocr.

OCR software, free and offline. 开源、免费的离线OCR软件。支持截屏/批量导入图片，PDF文档识别，排除水印/页眉页脚，扫描/生成二维码。内置多国语言库。

Vectorized implementation of the image binarization algorithm of Su et al. (2010)

Document Image Enhancement with GANs - TPAMI journal

A simple OCR API server, seriously easy to be deployed by Docker, on Heroku as well