ocr - SERP Analysis

https://en.wikipedia.org/wiki/Optical_character_recognition

https://www.onlineocr.net/

https://www.hhs.gov/ocr/index.html

https://aws.amazon.com/what-is/ocr/

https://cloud.google.com/use-cases/ocr

https://www.adobe.com/acrobat/guides/what-is-ocr.html