Class: 587 (Hammer), Feature: 1227

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	5	The highlighted visual attributes is on a hammer with the exception of the 3rd and 5th image. in the 3rd image it looks like the pump of a hand sanitizer and in the 5th the item is a power drill.
Main Object	4	The red region in the highlighted visual attributes focuses on the part of a hammer.
Main Object	2	Focus is on the upper part of the tools. in some pictures it falsely catches soap dispenser head as a hammer.
Main Object	3	Most of the images have the red regions on part of the handles of the hammers.
Main Object	4	Focus is on the handle of the hammer.


Votes for core: 5, Votes for spurious: 0. Feature is thus annotated as core for the class.