Extract the images and use some sort of OCR to extract the text from the images
– CleptusJun 18 '20 at 11:24
For example, using Microsoft's cloud services, you could use [Azure cognitive services](https://learn.microsoft.com/en-us/azure/cognitive-services/computer-vision/quickstarts/csharp-print-text) for the OCR part
– CleptusJun 18 '20 at 11:30