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The SR-tree: An Index Structure for High-Dimensional Nearest Neighbor Queries

by Norio Katayama, et al. , 1997
"... Recently, similarity queries on feature vectors have been widely used to perform content-based retrieval of images. To apply this technique to large databases, it is required to develop multidimensional index structures supporting nearest neighbor queries e ciently. The SS-tree had been proposed for ..."
Abstract - Cited by 438 (3 self) - Add to MetaCart
Recently, similarity queries on feature vectors have been widely used to perform content-based retrieval of images. To apply this technique to large databases, it is required to develop multidimensional index structures supporting nearest neighbor queries e ciently. The SS-tree had been proposed

UNIFORM IMAGE PARTITIONING FOR FRACTAL COMPRESSION ON VIRTUAL HEXAGONAL STRUCTURE

by Xiangjian He, Huaqing Wang, Wenjing Jia, Qiang Wu, Namho Hur, Jinwoong Kim, Tom Hintz
"... Abstract. Hexagonal structure is different from the traditional square struc-ture for image representation. The geometrical arrangement of pixels on hexag-onal structure can be described in terms of a hexagonal grid. Uniformly sepa-rating image into seven similar copies with a smaller scale has comm ..."
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virtual hexagonal structure that is scalable. Based on this virtual structure, algorithms for uni-form image separation are presented. The virtual hexagonal structure retains image resolution during the process of image separation, and does not intro-duce distortion. Furthermore, images can be smoothly

Disco: Running commodity operating systems on scalable multiprocessors

by Edouard Bugnion, Scott Devine, Mendel Rosenblum - ACM Transactions on Computer Systems , 1997
"... In this paper we examine the problem of extending modern operating systems to run efficiently on large-scale shared memory multiprocessors without a large implementation effort. Our approach brings back an idea popular in the 1970s, virtual machine monitors. We use virtual machines to run multiple c ..."
Abstract - Cited by 253 (10 self) - Add to MetaCart
where the virtual machines transparently share major data structures such as the program code and the file system buffer cache. We use the distributed system support of modern operating systems to export a partial single system image to the users. The overall solution achieves most of the benefits

Bilinear Interpolation on a Virtual Hexagonal Structure

by Xiangjiari He, Senior Member, Jianmin Li, Namho Hur
"... AbStract-- Spiral Architecture (SA) is a relatively new and powerful approach to machine vision system. The geometrical arrangement of pixels on SA can be described as a collection of hexagonal pixels. However, all the existing hardware for capturing image and for displaying image are produced based ..."
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interpolation, Spiral Architecture, image processing, hexagonal structure.

A Beam Tracing Approach to Acoustic Modeling for Interactive Virtual Environments

by Thomas Funkhouser , Ingrid Carlbom, Gary Elko, Gopal Pingali, Mohan Sondhi , Jim West , 1998
"... Virtual environment research has focused on interactive image generation and has largely ignored acoustic modeling for spatialization of sound. Yet, realistic auditory cues can complement and enhance visual cues to aid navigation, comprehension, and sense of presence in virtual environments. A prima ..."
Abstract - Cited by 108 (14 self) - Add to MetaCart
in interactive virtual environments. The spatial subdivision is a partition of 3D space into convex polyhedral regions (cells) represented as a cell adjacency graph. A beam tracing algorithm recursively traces pyramidal beams through the spatial subdivision to construct a beam tree data structure representing

Subband Image Coding with Hexagonal Quadrature Mirror Filters

by Eero P. Simoncelli, Edward H. Adelson - in Picture Coding Symposium , 1990
"... seband filter H(!) is that expression (1) have a value of unity for all !. Finally, these systems may be cascaded uniformly or non-uniformly (to form pyramid structures). Unlike traditional Gaussian or Laplacian pyramids, the representation is not overcomplete and may contain oriented subbands. We ..."
Abstract - Cited by 2 (0 self) - Add to MetaCart
seband filter H(!) is that expression (1) have a value of unity for all !. Finally, these systems may be cascaded uniformly or non-uniformly (to form pyramid structures). Unlike traditional Gaussian or Laplacian pyramids, the representation is not overcomplete and may contain oriented subbands. We

Materials for an exploratory theory of the network society.

by Manuel Castells , Anthony Giddens , Alain Touraine , Anthony Smith , Benjamin Barber , Peter Hall , Roger-Pol Droit , Sophie Watson , Frank Webster , Krishan Kumar , David Lyon , Craig Calhoun , Jeffrey Henderson , Ramon Ramos , Jose E Rodrigues-Ibanez , Jose F Tezanos , Mary Kaldor , Stephen Jones , Christopher Freeman - The British Journal of Sociology , 2000
"... ABSTRACT This article aims at proposing some elements for a grounded theor y of the network society. The network society is the social structure characteristic of the Information Age, as tentatively identi ed by empirical, cross-cultural investigation. It permeates most societies in the world, in v ..."
Abstract - Cited by 122 (0 self) - Add to MetaCart
;real virtuality'. Our symbolic environment is, by and large, structured by this exible, inclusive hypertext, in which many people surf each day. The virtuality of this text is in fact a fundamental dimension of reality, providing the symbols and icons from which we think and thus exist. This growing

Hexagonal discrete global grid systems for geospatial computing

by K Sahr - Archives of Photogrammetry, Cartography and Remote Sensing
"... ABSTRACT: Advanced geospatial applications often involve complex computing operations performed under sometimes severe resource constraints. These applications primarily rely on traditional raster and vector data structures based on square lattices. But there is a significant body of research that ..."
Abstract - Cited by 1 (0 self) - Add to MetaCart
that indicates that data structures based on hexagonal lattices may be a superior alternative for efficient representation and processing of raster and vector data in high performance applications. The advantages of hexagonal rasters for image processing are discussed, and hexagonal discrete global grid systems

A Progressive Transmission Image Coder Using Linear Phase Uniform Filterbanks as Block Transforms

by Trac D. Tran, Truong Q. Nguyen , 1999
"... This paper presents a novel image coding scheme using M-channel linear phase perfect reconstruction filterbanks (LPPRFB's) in the embedded zerotree wavelet (EZW) framework introduced by Shapiro [1]. The innovation here is to replace the EZW's dyadic wavelet transform by M-channel unifor ..."
Abstract - Cited by 46 (22 self) - Add to MetaCart
, the transform boasts efficient lattice structures, which employ a minimal number of delay elements and are robust under the quantization of lattice coefficients. The resulted compression algorithm also retains all attractive properties of the EZW coder and its variations such as progressive image transmission

VSA-based Fractal Image Compression

by Huaqing Wang, Meiqing Wang, Tom Hintz, Qiang Wu, Xiangjian He
"... Spiral Architecture (SA) is a novel image structure which has hexagons but not squares as the basic elements. Apart from many other advantages in image processing, SA has shown two unbeatable characters that have potential to improve image compression performance, namely, Locality of Pixel Density a ..."
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Spiral Architecture (SA) is a novel image structure which has hexagons but not squares as the basic elements. Apart from many other advantages in image processing, SA has shown two unbeatable characters that have potential to improve image compression performance, namely, Locality of Pixel Density
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