Search results for "coding"

showing 10 items of 920 documents

Silhouette encoding and synthesis using elliptic Fourier descriptors, and applications to videoconferencing

2004

Abstract This paper investigates the use of elliptic Fourier descriptors as a shape descriptor for encoding the silhouette of a person. Shape descriptors are here used for predicting the shape of silhouettes in missing frames within a sequence. This prediction scheme is applied to the case of generating in-between images in a low frame rate videoconferencing system, where the reconstructed silhouette is used as a binary mask for reducing the computational time for the frame reconstruction.

Sequencebusiness.industryComputer scienceFrame (networking)ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISIONBinary numberFrame ratecomputer.software_genreLanguage and LinguisticsComputer Science ApplicationsSilhouetteHuman-Computer Interactionsymbols.namesakeFourier transformVideoconferencingComputer Science::Computational Engineering Finance and ScienceComputer Science::Computer Vision and Pattern RecognitionEncoding (memory)symbolsComputer visionArtificial intelligencebusinesscomputerComputingMethodologies_COMPUTERGRAPHICSJournal of Visual Languages & Computing
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A New Multicast Technique for Video Transmission over ABR Services in ATM Networks

2000

Multicast techniques are the only way to simultaneously provide flows of information from one source to several destinations. The intention of this paper is to study and to evaluate different multicast techniques using a video coder based on an adaptive video compression algorithm with subband coding and a best effort network service like ATM with the Available Bit Rate (ABR) service. This video transmission can adapt faster and easily to changing network conditions. In this way, we present an evaluation process for a determined network configuration. Thereafter we discuss the results obtained by simulation and propose for this video transmission a trade-off between these multicast techniqu…

Service (systems architecture)Multicastbusiness.industryComputer scienceQuality of serviceATM adaptation layerNetwork serviceProcess (computing)Data_CODINGANDINFORMATIONTHEORYbusinessComputer networkSub-band codingData compression
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An Encoding in Metaheuristics for the Minimum Communication Spanning Tree Problem

2009

Problem-specific encodings can improve the performance of metaheuristics, such as genetic algorithms or simulated annealing. This paper studies the link-biased (LB) encoding, which is a tree representation, and applies metaheuristics using this encoding to the minimum communication spanning tree (MCST) problem. Given the communication requirements of the nodes, the MCST problem seeks a communication spanning tree with minimum total cost. Optimal solutions for MCST problems are similar to minimum spanning trees (MSTs), and the LB encoding exploits this property by encoding trees similar to MSTs with higher probability. The paper investigates how to systematically design problem-specific enc…

Set (abstract data type)Spanning treeTree representationEncoding (memory)Simulated annealingGeneral EngineeringMinimum spanning treeTelecommunications networkAlgorithmMetaheuristicMathematicsINFORMS Journal on Computing
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Construction and Implementation of LR(1) Parsers

1990

This chapter is devoted to the practical issues involved in the construction and use of deterministic LR(1) parsers. We shall show how the practical versions of LR (1) parsers, most notably the LALR (1) parsers, can be constructed efficiently, and we shall present methods for encoding LR(1) parsers as efficient RAM programs. Two versions of RAM program implementation are considered: in the first implementation the parsing program is table-driven, that is, the rules of the parser are encoded in a two-dimensional array which is simulated by a program body; in the other implementation the tabular information is further transformed into a set of program statements.

Set (abstract data type)TheoryofComputation_MATHEMATICALLOGICANDFORMALLANGUAGESParsingLR parserComputer scienceProgramming languageEncoding (memory)computer.software_genreLALR parsercomputerCanonical LR parser
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An Introduction to Computational Complexity

2016

This chapter is not strictly about algebra. However, this chapter offers a set of mathematical and computational instruments that will allow us to introduce several concepts in the following chapters. Moreover, the contents of this chapter are related to algebra as they are ancillary concepts that help (and in some cases allow) the understanding of algebra.

Set (abstract data type)symbols.namesakeTheoretical computer scienceComputational complexity theoryComputer scienceAsymptotic computational complexityWorst-case complexitysymbolsComputational problemAlgebra over a fieldComputational resourceHuffman coding
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Metagenomic strategies to assess genetic diversity in Phytophthora species

Settore AGR/12 - Patologia VegetaleMetabarcoding Phytophthora spp. genus specific primers Sanger/cloning sequencing pyrosequencing MiSeq Illumina
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Phylogenetic analysis of the Sicilian Hieracium taxa (Asteraceae) using "DNA barcoding": preliminary data

2014

Settore BIO/02 - Botanica SistematicaDNA barcoding Hieracium phylogenetic analysis Sicily
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DNA barcoding of the Mediterranean chondrichthyans (ELASMOMED)

2010

Settore BIO/05 - ZoologiaDNA Barcoding Mediterranean ChondrichthyansDNA barcoding ELASMOMED
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A Mediterranean record of Eulalia ornata (Annelida: Phyllodocidae) corroborating its fidelity link with the Sabellaria alveolata-reef habitat

2015

Among marine habitats Sabellaria alveolata -reefs deserve protection since they provide important ecosystem services and positive effects on biodiversity. Several marine species are listed among the S. alveolata -reef associated fauna, but characteristic species were seldom reported. Eulalia ornata (Annelida, Phyllodocidae) might represent an exception, since it appears common/abundant in S. alveolata -reefs of the Eastern Atlantic. The most evident geographical mismatch in the distributions of E. ornata and these biogenic reefs occurs in the Mediterranean Sea, where S. alveolata -reefs are commonly found, but E. ornata was never recorded, whilst E. viridis , a non-Mediterranean species, wa…

Settore BIO/07 - EcologiaEnvironmental EngineeringEulalia viridisSettore BIO/05 - ZoologiaAquatic ScienceOceanographyEulalia viridilcsh:Aquaculture. Fisheries. AnglingEulalia clavigera.Eulalia viridisSabellaria alveolataMediterranean seacharacteristic specieEulalia clavigeraMediterranean Seanew recordReefEcology Evolution Behavior and SystematicsBar-codinglcsh:SH1-691geographygeography.geographical_feature_categorybiologyEcologyMarine habitatsbiology.organism_classificationEcology Evolution Behavior and SystematicbarcodingBio-construction barcoding new record Mediterranean Sea Sabellaria alveolata characteristic species Eulalia viridis Eulalia clavigera.Bar-coding; Bio-construction; Characteristic species; Eulalia clavigera; Eulalia viridis; Mediterranean sea; New record; Sabellaria alveolata; Oceanography; Environmental Engineering; Ecology Evolution Behavior and Systematics; Aquatic ScienceBio-construction Characteristic species Eulalia clavigera Eulalia viridis Mediterranean sea New record Sabellaria alveolataEulaliaHabitatBio-constructionEulalia clavigeracharacteristic speciesSabellaria alveolataMediterranean Marine Science
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Matematica e arti visive: percorsi interdisciplinari fra matematica, arte e coding

2018

[no abstract]

Settore INF/01 - InformaticaCoding educazione informatica arti visive
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