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  • Fast lifting schéma, využitelné při výpočtu diskrétní vlnkové transformace, představuje vysoce efektivní cestu výpočtu vlnkových koeficientů. Článek se zabývá implementací této metody v jazyce Java pro případ CDF 9/7 vlnkových filtrů a nastiňuje tak základní předpoklady pro vytvoření efektivního ztrátového kompresního kodeku obrazu založeného na diskrétní vlnkové transformaci. Testování prokázalo, že algoritmus je vyjímečný ve srovnání se standardním přístupem založeným na konvoluci, a to jak v otázkách rychlosti, tak paměťové náročnosti. Algoritmus je také daleko snazší na implementaci, protože nemusíme aplikovat speciální ošetřování okrajových jevů jako je prodloužení a ořezání. (cs)
  • The fast lifting-based approach for the discrete wavelet transform presents a very efficient way of computing wavelet coefficients. We have successfully created a Java implementation of this coding technique for the case of CDF 9/7 filterbanks, which is a starting point of proposing lossy image compression format based on DWT, that will make use of this platform. Testing of the algorithm has confirmed it to be superior when compared to the standard convolutional approach, both in terms of computational speed and memory efficiency. The algorithm is also much simpler to implement than the standard convolutional way, because we don't need to perform manipulation on the source signal in order to archieve boundary extension and cutoff (after the transform).
  • The fast lifting-based approach for the discrete wavelet transform presents a very efficient way of computing wavelet coefficients. We have successfully created a Java implementation of this coding technique for the case of CDF 9/7 filterbanks, which is a starting point of proposing lossy image compression format based on DWT, that will make use of this platform. Testing of the algorithm has confirmed it to be superior when compared to the standard convolutional approach, both in terms of computational speed and memory efficiency. The algorithm is also much simpler to implement than the standard convolutional way, because we don't need to perform manipulation on the source signal in order to archieve boundary extension and cutoff (after the transform). (en)
Title
  • Performance of discrete wavelet transform lifting scheme approach
  • Performance of discrete wavelet transform lifting scheme approach (en)
  • Efektivita fast lifting schématu při výpočtu diskrétní vlnkové transformace (cs)
skos:prefLabel
  • Performance of discrete wavelet transform lifting scheme approach
  • Performance of discrete wavelet transform lifting scheme approach (en)
  • Efektivita fast lifting schématu při výpočtu diskrétní vlnkové transformace (cs)
skos:notation
  • RIV/00216305:26220/07:PU69149!RIV08-GA0-26220___
http://linked.open.../vavai/riv/strany
  • 231-239
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(1ET301710509), P(GA102/07/1303), P(GP102/06/P407), Z(MSM0021630513)
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 440978
http://linked.open...ai/riv/idVysledku
  • RIV/00216305:26220/07:PU69149
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • Discrete wavelet transform, fast lifting, Cohen-Daubechies-Feauveau wavelet 9/7, image compression, convolution (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...ontrolniKodProRIV
  • [D51148166BC9]
http://linked.open...v/mistoKonaniAkce
  • Praha
http://linked.open...i/riv/mistoVydani
  • Neuveden
http://linked.open...i/riv/nazevZdroje
  • Proceedings of the 12th IFIP International Conference
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...iv/tvurceVysledku
  • Malý, Jan
  • Rajmic, Pavel
http://linked.open...vavai/riv/typAkce
http://linked.open.../riv/zahajeniAkce
http://linked.open...n/vavai/riv/zamer
number of pages
http://purl.org/ne...btex#hasPublisher
  • Neuveden
https://schema.org/isbn
  • 978-0-387-74158-1
http://localhost/t...ganizacniJednotka
  • 26220
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