Image region entropy: a measure of "visualness" of web images associated with one concept

Authors:
Keiji Yanai;Kobus Barnard
Affiliations:
University of Electro-Communications, Tokyo, JAPAN;University of Arizona, Tucson, AZ
Venue:
Proceedings of the 13th annual ACM international conference on Multimedia
Year:
2005

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Abstract

We propose a new method to measure "visualness" of concepts, that is, what extent concepts have visual characteristics. To know which concept has visually discriminative power is important for image annotation, especially automatic image annotation by image recognition system, since not all concepts are related to visual contents. Our method performs probabilistic region selection for images which are labeled as concept "X" or "non-X", and computes an entropy measure which represents "visualness" of concepts. In the experiments, we collected about forty thousand images from the World-Wide Web using the Google Image Search for 150 concepts. We examined which concepts are suitable for annotation of image contents.