相关站点:
https://paddlepaddle.github.io/PaddleOCR/ppocr/overview.html
https://github.com/opendatalab/PDF-Extract-Kit/blob/main/README-zh_CN.md
https://github.com/tesseract-ocr/tesseract
https://console.bce.baidu.com/
https://learn.microsoft.com/zh-cn/azure/ai-services/computer-vision/quickstarts-sdk/image-analysis-client-library-40