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Article
Open AccessSearch and comparison of (epi)genomic feature patterns in multiple genome browser tracks
Genome browsers are widely used for locating interesting genomic regions, but their interactive use is obviously limited to inspecting short genomic portions. An ideal interaction is to provide patterns of reg...
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Chapter and Conference Paper
A k–Skyband Approach for Feature Selection
Distance concentration is a phantom menace for the labeling of high dimensional data by distance-based classifiers. Filter methods reduce data dimensionality, but they also add their ranking bias indirectly in...
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Chapter and Conference Paper
Finding Preferred Objects with Taxonomies
Preferences about objects of interest are often expressed at different levels of granularity, not always matching the level of detail of stored data. For instance, we prefer rock to pop music, yet scheduled co...
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Reference Work Entry In depth
Multimedia Data Indexing
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Chapter
Multimedia, Similarity, and Preferences: Adding Flexibility to Your Information Needs
Starting from the 90’s, it was easily recognized that commonly adopted search paradigms were not enough to deal with at-the-time emerging novel DB applications, in which the presence of multimedia data and hig...
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Living Reference Work Entry In depth
Multimedia Data Indexing
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Chapter and Conference Paper
The Power of Distance Distributions: Cost Models and Scheduling Policies for Quality-Controlled Similarity Queries
Approximate similarity queries are a practical way to obtain good, yet suboptimal, results from large data sets without having to pay high execution costs. In this paper we analyze the problem of understanding...
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Chapter and Conference Paper
Modeling the Propagation of User Preferences
User preferences are a fundamental ingredient of personalized database applications, in particular those in which the user context plays a key role. Given a set of preferences defined in different contexts, in...
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Article
Query processing issues in region-based image databases
Many modern image database systems adopt a region-based paradigm, in which images are segmented into homogeneous regions in order to improve the retrieval accuracy. With respect to the case where images are dealt...
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Reference Work Entry In depth
Multimedia Data Indexing
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Chapter and Conference Paper
Imagination: Exploiting Link Analysis for Accurate Image Annotation
The advent of digital photography calls for effective techniques for managing growing amounts of color images. Systems that only rely on low-level image features are nowadays limited by the semantic gap proble...
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Article
Flexible integration of multimedia sub-queries with qualitative preferences
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Article
Flexible integration of multimedia sub-queries with qualitative preferences
Complex multimedia queries, aiming to retrieve from large databases those objects that best match the query specification, are usually processed by splitting them into a set of m simpler sub-queries, each dealing...
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Article
Adaptively browsing image databases with PIBE
Browsing large image collections is a complex and often tedious task, due to the semantic gap existing between the user subjective notion of similarity and the one according to which a browsing system organize...
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Chapter and Conference Paper
Processing Preference Queries in Standard Database Systems
Locating the “right” piece of information among a wide range of available alternatives is not an easy task, as everyone has experienced at least once during his/her lifetime. In this paper we look at some rece...
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Chapter and Conference Paper
A Unified and Flexible Framework for Comparing Simple and Complex Patterns
One of the most important operations involving Data Mining patterns is computing their similarity. In this paper we present a general framework for comparing both simple and complex patterns, i.e., patterns bu...
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Chapter and Conference Paper
Relevance Ranking Tuning for Similarity Queries on XML Data
Similarity query techniques integrating semantics and structure of XML data have been recently investigated. Mostly, query relaxations are not fully exploited to retrieve data that approximate query conditions...
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Chapter and Conference Paper
The Collection Index to Support Complex Approximate Queries
The presence of structure in XML documents poses new challenges for the retrieval of data. Answering complex structured queries with predicates on context where data is to be retrieved, implies to find results th...
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Chapter and Conference Paper
String Matching with Metric Trees Using an Approximate Distance
Searching in a large data set those strings that are more similar, according to the edit distance, to a given one is a time-consuming process. In this paper we investigate the performance of metric trees, namely ...
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Chapter and Conference Paper
Adding Flexibility to Structure Similarity Queries on XML Data
The presence of structure inside XML documents poses the hard challenge of providing fiexible query matching methods for effective retrieval of results. In this paper we present an approach that faces this iss...
