Learn what an image description contains in Microsoft Azure AI Vision for the AI-900 certification exam. Understand how confidence scores and descriptive phrases work together.
Question
You are working on building an Al application that will analyze your users’ images. You want to get back an image description with each image.
Which of the following does an image description contain?
A. A confidence score
B. A sentence or phrase and a confidence score
C. A sentence or phrase
D. A bounding box
Answer
B. A sentence or phrase and a confidence score
Explanation
In Microsoft Azure AI Vision, an image description consists of a sentence or phrase that describes the content of the image, accompanied by a confidence score. This confidence score represents the system’s certainty about the accuracy of the description.
Sentence or Phrase
The service generates a human-readable caption summarizing the image’s content, such as “a cat sitting on a sofa.”
Confidence Score
Along with the caption, a numerical score (e.g., 0.85) is provided, indicating how confident the model is in its description. The closer this score is to 1, the higher the confidence in its accuracy.
Azure AI Vision uses advanced machine learning algorithms to analyze visual features and produce multiple descriptions ranked by their confidence scores. This functionality is critical for applications requiring automated image analysis, such as accessibility tools or content moderation systems.
Why Not Other Options?
Option A (A confidence score): While a confidence score is included, it is not sufficient by itself; it must accompany a descriptive phrase.
Option C (A sentence or phrase): A sentence or phrase alone does not provide enough context about its reliability without a confidence score.
Option D (A bounding box): Bounding boxes are used for object detection tasks, not for generating image descriptions.
This combination of a descriptive phrase and confidence score ensures that users can interpret both the content and reliability of the analysis effectively, making Option B the correct choice for this question.
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