Azure Computer Vision: Automatically Describe Images with Natural Language
Which Azure AI service can analyze an image and return a description of its contents in natural language?
Quick Answer
The answer is Azure AI Vision (formerly known as Computer Vision). This service is the correct choice because it includes a specialized image analysis API that uses deep learning models to detect objects, actions, and scenes within an image, then generates a fluent, human-readable caption describing the image’s contents in natural language. On the Microsoft Azure AI Fundamentals AI-900 exam, this question tests your understanding of which Azure AI service handles visual understanding tasks, often appearing alongside similar services like Custom Vision or Form Recognizer—a common trap is confusing Azure AI Vision with Azure Cognitive Services for Language, but remember that Vision is the only one designed for image-to-text description. To lock this in, use the memory tip: “Vision sees and speaks,” meaning it both analyzes the visual scene and outputs a natural language description.
⚠ Common exam trap
Many candidates confuse Azure AI Language (which handles text) with Azure AI Vision, assuming that 'natural language' output implies a language service, when in fact the image-to-text description is a core feature of the Vision service.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure AI Vision (Computer Vision)
Azure AI Vision (Computer Vision) includes an image analysis API that can generate a human-readable description of an image's contents. This feature uses deep learning models to identify objects, actions, and scenes, then produces a natural language caption describing the image. The correct answer is B because this is the specific service designed for image understanding and description generation.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Azure AI Language
Why it's wrong here
Azure AI Language processes text — not images. Vision services handle image analysis.
- ✓
Azure AI Vision (Computer Vision)
Why this is correct
Azure AI Vision can analyze images and generate natural language descriptions, identify objects, and extract text from images.
- ✗
Azure AI Speech
Why it's wrong here
Azure AI Speech converts speech to text and text to speech — it doesn't analyze image content.
- ✗
Azure Bot Service
Why it's wrong here
Bot Service builds conversational agents — not an image analysis service.
Go deeper
Related to this question
Learn chapter
Machine Learning Core Concepts
Key term
Azure AI Vision
Azure AI Vision is a cloud-based service from Microsoft that uses pre-built machine learning models to extract information from images and videos, such as objects, text, faces, and scene descriptions.
Key term
Service
A service is a software component or system that performs a specific function and is available to be used by other programs or users over a network.
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Same concept, more angles
1 more way this is tested on AI-900
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A museum wants to create an application that automatically generates descriptive captions for uploaded photos of artworks. The captions should describe the main subject, scene, and artistic style. Which Azure Computer Vision capability should they use?
medium- A.Optical Character Recognition (OCR)
- ✓ B.Image Analysis (with description feature)
- C.Face API
- D.Custom Vision (object detection)
Why B: The Image Analysis capability in Azure Computer Vision includes a description feature that generates human-readable captions summarizing the main subject and scene of an image, using pre-trained deep learning models. It does not explicitly identify artistic style, but it is the only option that provides automated image captioning without custom training.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This AI-900 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AI-900 exam.