AWS Certified Machine Learning – Specialty — Question 251

A beauty supply store wants to understand some characteristics of visitors to the store. The store has security video recordings from the past several years. The store wants to generate a report of hourly visitors from the recordings. The report should group visitors by hair style and hair color.

Which solution will meet these requirements with the LEAST amount of effort?

Answer options

• A. Use an object detection algorithm to identify a visitor’s hair in video frames. Pass the identified hair to an ResNet-50 algorithm to determine hair style and hair color.
• B. Use an object detection algorithm to identify a visitor’s hair in video frames. Pass the identified hair to an XGBoost algorithm to determine hair style and hair color.
• C. Use a semantic segmentation algorithm to identify a visitor’s hair in video frames. Pass the identified hair to an ResNet-50 algorithm to determine hair style and hair color.
• D. Use a semantic segmentation algorithm to identify a visitor’s hair in video frames. Pass the identified hair to an XGBoost algorithm to determine hair style and hair.

Correct answer: A

Explanation

Option A is the best choice because it employs an object detection algorithm, which is efficient for identifying specific features like hair, followed by the ResNet-50 algorithm, which is well-suited for classifying images into categories such as hair style and color. The other options either use semantic segmentation, which is more complex and requires more effort, or use XGBoost, which is not optimal for this image classification task.