Class: 640 (Manhole Cover), Feature: 1398

MTurk Worker Annotations

We now show the responses from five crowdworkers used to annotate this class-feature pair as core or spurious. Workers first denote if the focus of the image is on the main object (core), or a separate or background object (spurious). They also mark their confidence on a scale of 1 to 5, and provide written explanations for their annotation.



Main Focus	Confidence	Explanation
Main Object	4	The red region in the highlighted visual attributes focuses on the part of a manhole cover.
Separate Object	4	Road is not a part of manhole
Main Object	5	Focus is around the center cover
Main Object	3	Manhole cover has been highlighted.
Main Object	4	The highlighted visual attribute is touching the edge of the manhole cover in every image except the first image. the first image is a bottle cap imbedded in concrete so i can see why it may think that is a manhole cover but it is not.


Votes for core: 4, Votes for spurious: 1. Feature is thus annotated as core for the class.