You are working on building an application that can extract text from handwritten (English only) and printed text, text-heavy images and multi-page PDF. 
Which of the below listed should you use?

Answer options:

A.Computer Vision Analyze Image API
B.Custom Vision API
C.Content Moderator
D.Computer Vision Read API

Correct Answer:D
Option A is INCORRECT. Computer Vision Analyze Image API does not perform OCR and text extraction. Computer Vision Analyze Image API can perform below amongst others
- Object detection 
- Brand detection 
- Image Categorization 
- Image description Option B is INCORRECT. Custom Vision does not perform OCR and Text extraction.
Option C is INCORRECT. Content Moderator performs the moderation of the content and facilitates human review tools for videos, text and images. Content moderator does not perform OCR and text extraction.
Option D is CORRECT. Azure`s latest OCR technology, Computer Vision Read API, can be used for the purpose of text-extraction from handwritten (English only) and printed text, text-heavy images and multi-page PDF.References: 

https://azure.microsoft.com/en-in/services/cognitive-services/custom-vision-service/
https://azure.microsoft.com/en-in/services/cognitive-services/content-moderator/
https://docs.microsoft.com/en-us/azure/cognitive-services/computer-vision/concept-recognizing-text