Virtual images for similarity retrieval in image databases |
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Authors: | Petraglia G. Sebillo M. Tucci M. Tortora G. |
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Affiliation: | Dipt. di Matematica e Informatica, Salerno Univ. ; |
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Abstract: | We introduce the virtual image, an iconic index suited for pictorial information access in a pictorial database, and a similarity retrieval approach based on virtual images to perform content-based retrieval. A virtual image represents the spatial information contained in a real image in explicit form by means of a set of spatial relations. This is useful to efficiently compute the similarity between a query and an image in the database. We also show that virtual images support real-world applications that require translation, reflection, and/or rotation invariance of image representation |
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