Techniques and data structures for efficient multimedia retrieval based on similarity

Authors:
Guojun Lu
Affiliations:
Gippsland Sch. of Comput. & Inf. Technol., Monash Univ., Churchill
Venue:
IEEE Transactions on Multimedia
Year:
2002

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Abstract

As more and more information is captured and stored in digital form, many techniques and systems have been developed for indexing and retrieval of text documents, audio, images, and video. The retrieval is normally based on similarities between extracted feature vectors of the query and stored items. Feature vectors are usually multidimensional. When the number of stored objects and/or the number of dimensions of the feature vectors are large, it will be too slow to linearly search all stored feature vectors to find those that satisfy the query criteria. Techniques and data structures are thus required to organize feature vectors and manage the search process so that objects relevant to the query can be located quickly. This paper provides a survey of these techniques and data structures.