You are a machine learning specialist at a security firm that is building a video surveillance service to be used by police departments across the country. This service needs to process the streaming video frames to find suspicious activity in public places such as train stations, subway platforms, etc. To accomplish this task, your team needs to use a machine learning technique to find objects in the video frames on a list of objects identified as potentially dangerous, such as weapons. You require to label your images by identifying the contents of your images at the pixel level for high accuracy.
Which AWS service gives you the labeling accuracy your project requires?

Answer options:

A.SageMaker Ground Truth Bounding Box labeling task
B.SageMaker Ground Truth Image Classification labeling task
C.SageMaker Ground Truth Image Semantic Segmentation labeling task
D.SageMaker Ground Truth Named Entity Recognition labeling task

Answer: C
Option A is incorrect. Using the SageMaker Ground Truth Bounding Box labeling task, you can identify the pixel location of an object, but not identify the contents of an image at the pixel level.
Option B is incorrect. Using the SageMaker Ground Truth Image Classification labeling task, your workers will classify your images using a predefined set of labels that you specify, but do not identify the contents of an image at the pixel level.
Option C is CORRECT. Using the SageMaker Ground Truth Image Semantic Segmentation labeling task, your workers classify pixels in the image into a set of predefined labels or classes. This will give you the pixel-level label identification accuracy you require.
Option D is incorrect. The SageMaker Ground Truth Named Entity Recognition labeling task is used to extract information from unstructured text and classify it into predefined categories.
Reference:
Please see the Amazon SageMaker developer guide titled Use Amazon SageMaker Ground Truth to Label Data.
Please see the Amazon SageMaker developer guide titled Bounding Box.
Please see the Amazon SageMaker developer guide titled Image Semantic Segmentation.
Please see the Amazon SageMaker developer guide titled Image Classification (Single Label).
Please see the Amazon SageMaker developer guide titled Named Entity Recognition.