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Graph-based retrieval of PET-CT images using vector space embedding | IEEE Conference Publication | IEEE Xplore

Graph-based retrieval of PET-CT images using vector space embedding


Abstract:

Graph-based content-based image retrieval (CBIR) techniques, which use graphs to represent image features and calculate image similarity using the graph edit distance, ac...Show More

Abstract:

Graph-based content-based image retrieval (CBIR) techniques, which use graphs to represent image features and calculate image similarity using the graph edit distance, achieve high retrieval accuracy. However, such techniques suffer from high computational complexity. In this paper, we present a graph-based CBIR algorithm that achieves improved retrieval efficiency. We compute a vector space embedding for every graph, using their distances from a set of prototype graphs, so that each vector component represents a distortion from a prototype. This process is performed offline. We compare images by computing the Euclidean distance of the vector embeddings, which is a faster process than calculating the graph edit distance. We evaluated our work using 50 combined positron emission tomography and computed tomography (PET-CT) volumes of patients with lung tumours. Our results show that our method is at least 21 times faster than the graph edit distance with a mean average precision difference of less than 4%.
Date of Conference: 20-22 June 2013
Date Added to IEEE Xplore: 10 October 2013
Electronic ISBN:978-1-4799-1053-3
Print ISSN: 1063-7125
Conference Location: Porto, Portugal

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