What does Azure AI Vision's 'optical character recognition' (OCR) feature do?
OCR reads text from photos and scanned documents — enabling digitisation of printed/handwritten content for further processing.
Why this answer
Azure AI Vision's OCR feature is designed to extract printed and handwritten text from images and documents, converting visual text into machine-readable data. This is correct because OCR uses deep learning models to detect and read text characters from various visual sources, enabling downstream processing like search or analysis.
Exam trap
The trap here is that candidates may confuse OCR with other computer vision tasks like object detection (Option C) or assume OCR includes post-processing like spell checking (Option D), when in fact OCR is strictly about text extraction from visual media.
How to eliminate wrong answers
Option A is wrong because OCR extracts text from images, not converts text files into images; that would be a rendering or archival process, not OCR. Option C is wrong because OCR recognizes text characters, not optical fibre cables; cable recognition would require object detection or image classification, not OCR. Option D is wrong because OCR only extracts text as-is without correcting spelling errors; spell correction is a separate natural language processing task.