Results 261 to 270 of about 422,181 (302)
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Spatial Color Indexing and Applications
International Journal of Computer Vision, 1999We define a new image feature called the color correlogram and use it for image indexing and comparison. This feature distills the spatial correlation of colors and when computed efficiently, turns out to be both effective and inexpensive for content-based image retrieval.
Jing Huang 0019 +4 more
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MeTree: A Metric Spatial Index
2020Metric Spaces model databases allowing similarity searching. e.g., looking for objects similar to a given one. Spatial databases are used to store and efficiently retrieve data with some spatial attribute. Some applications need to search both by similarity and space at the same time.
Adrián Planas +2 more
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Spatial Indexing with a Scale Dimension
1999It is frequently the case that spatial queries require a result set of objects whose scale - however this may be more precisely defined - is the same as that of the query window. In this paper we present an approach which considerably improves query performance in such cases.
Mike Hörhammer, Michael Freeston
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Spatial indexing and analytics on Hadoop
Proceedings of the 22nd ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems, 2014Effective processing of extremely large volumes of spatial data has led to many organizations employing distributed processing frameworks. Hadoop is one such open-source framework that is enjoying widespread adoption. In this paper, we detail an approach to indexing and performing key analytics on spatial data that is persisted in HDFS.
Randall T. Whitman +3 more
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The price of generality in spatial indexing
Proceedings of the 2nd ACM SIGSPATIAL International Workshop on Analytics for Big Geospatial Data, 2013Efficient indexing can significantly speed up the processing of large volumes of spatial data in many BigData applications. Many new emerging spatial applications (e.g., biomedical imaging, genome analysis, etc.) have varying indexing requirements, thus, a unified indexing infrastructure for implementing new indexing schemes without requiring knowledge
Bogdan Simion +3 more
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Indexing support for spatial joins
Data & Knowledge Engineering, 2000Summary: We introduce a new file organization for the storage and manipulation of spatial (or multidimensional) data that is able to execute spatial join operations with great efficiency. The filter tree access method is a hierarchical organization that tends to separate spatial entities by size. We provide algorithms for constructing filter trees, for
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The role of location indexes in spatial perception: A sketch of the FINST spatial-index model
Cognition, 1989This paper hypothesizes a resource-limited mechanism, called a FINST, for individuating or indexing visual features, as distinct from encoding their type or location. FINSTs have the property that they index features in a way that is transparent to their retinal location, and hence under certain conditions succeed in "pointing to" scene locations.
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An index of spatial distribution
Population Ecology, 1966SummaryThe index , which takes the value of −1 for a perfectly regular distribution, +1 for a highly aggregated distribution and 0 for the distribution implied by the theoretical varianceσ2, is proposed and a significance table provided.
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