Walter ten Brinke, David McG. Squire and John
Bigelow,
Similarity: Measurement, Ordering and Betweenness,
In Mircea Gh. Negoita, Robert J. Howlett and Lakhmi C.
Jain eds., Proceedings of the Eighth International Conference on
Knowledge-Based Intelligent Information and Engineering Systems (KES
2004) (Part II),
Wellington, New Zealand, No. 3214 in Lecture Notes in Computer Science, pp. 996-1002, September 20-24 2004.This paper presents an overview of the challenges of producing a list of retrieval results ranked according to perceptual similarity. We explain some of the problems in using a metric to measure peceptual similarity, and consider the arguments for the desirability of metrics for retrieval. We discuss the use of broader definitions of betweenness to produce such a ranking of retrieval results. We propose some initial ideas of a notion of projective betweenness that makes explicit the intuition that two referents should be used when producing a similarity ranking, and indicate how it might be used in relevance feedback.