In a classification task for scene elements, how should a person in a crosswalk be labeled?

In a classification task for scene elements, how should a person in a crosswalk be labeled?

• A. Ground
• B. Object
• C. Hazard
• D. Unknown

Answer: (B)

The key idea is how scene elements are categorized: ground, object, hazard, or unknown. A person is a distinct entity in the image with clear boundaries, not part of the surface you’re standing on. In this labeling scheme, that makes them an object. Ground covers the surfaces like road, sidewalk, or painted crosswalk itself, while hazard would be reserved for elements that denote immediate danger rather than a general category of items. Unknown is for items you can’t identify. Since a person is recognizable and does not belong to the ground category and isn’t inherently a hazard, labeling them as an object is the most accurate choice.

The key idea is how scene elements are categorized: ground, object, hazard, or unknown. A person is a distinct entity in the image with clear boundaries, not part of the surface you’re standing on. In this labeling scheme, that makes them an object. Ground covers the surfaces like road, sidewalk, or painted crosswalk itself, while hazard would be reserved for elements that denote immediate danger rather than a general category of items. Unknown is for items you can’t identify. Since a person is recognizable and does not belong to the ground category and isn’t inherently a hazard, labeling them as an object is the most accurate choice.