Renato Bueno

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Content-Based Image Retrieval (CBIR) Systems allow the search of images by similarity employing a numeric representation automatically or semi-automatically obtained from them to perform the search. Nevertheless, the query result does not always bring what the user expected. In this sense, CBIR systems face the semantic gap problem. One way of overcoming(More)
Searching for the exact answer to a similarity query is an expensive process considering computational resources, such as memory and processing time requirements. Moreover, comparison operations over multimedia data is even more expensive than over traditional data such as numbers and small character strings. Therefore, when comparing multimedia data, the(More)
New Challenges in Petascale Scientific Databases p. 1 Adventures in the Blogosphere p. 2 The Evolution of Vertical Database Architectures A Historical Review p. 3 Query Optimization in Scientific Databases Linked Bernoulli Synopses: Sampling along Foreign Keys p. 6 Query Planning for Searching Inter-dependent Deep-Web Databases p. 24 Summarizing(More)
Complex data is usually represented through signatures, which are sets of features describing the data content. Several kinds of complex data allow extracting different signatures from an object, representing complementary data characteristics. However, there is no ground truth of how balancing these signatures to reach an ideal similarity distribution. It(More)