Pein, Raoul Pascal and Lu, Joan (2006) Content based image retrieval by combining features and query-by-sketch. In: Proceedings of 2006 International Conference on Information & Knowledge Engineering. CSREA Press, Las Vegas, USA, pp. 49-55. ISBN 1-60132-003-5

This paper reports an approach to improve content-based image retrieval systems. Most
current systems are based on a single technique for feature extraction and similarity search.
Each technique has its advantages and drawbacks concerning the result quality. Usually they
cover one or two certain features of the image, e.g. histograms or shape information. To
overcome these restrictions a flexible framework is proposed, capable of combining several
different features in a single retrieval system. This system allows an administrator to build
a repository managing different feature vectors. A user searching through this repository
defines and weights these features according to his needs in the query. It concludes that a
combined retrieval can be used much more widely than a highly specialized one and the use
of query-by-sketch or -example combined with semantic information (e.g. keywords) could
enhance the result quality.

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