The correct answer is B. Optical Character Recognition (OCR).
Optical Character Recognition (OCR) is a feature of Azure AI Vision that converts printed or handwritten text within images into machine-readable text. In this scenario, the goal is to read runner numbers on shirts from race photos. OCR can identify and extract these numbers, allowing them to be associated with specific participants.
Option analysis:
A. Image classification: Categorizes entire images (e.g., “runner,” “crowd”), not text.
B. Optical Character Recognition (OCR) — ✅ Correct. Extracts alphanumeric text from images.
C. Object detection: Identifies and locates objects (e.g., shoes, cars) but doesn’t read text.
D. Facial recognition: Identifies individuals by matching facial features to known identities, not by reading numbers.
Therefore, to read and extract runner numbers from photos, the correct computer vision technique is Optical Character Recognition (OCR).
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