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Scopus: 2 cites, Web of Science: 1 cites,
2-step scalar deadzone quantization for bitplane image coding
Aulí Llinàs, Francesc (Universitat Autònoma de Barcelona. Departament d'Enginyeria de la Informació i de les Comunicacions)

Data: 2013
Resum: Modern lossy image coding systems generate a quality progressive codestream that, truncated at increasing rates, produces an image with decreasing distortion. Quality progressivity is commonly provided by an embedded quantizer that employs uniform scalar deadzone quantization (USDQ) together with a bitplane coding strategy. This paper introduces a 2-step scalar deadzone quantization (2SDQ) scheme that achieves same coding performance as that of USDQ while reducing the coding passes and the emitted symbols of the bitplane coding engine. This serves to reduce the computational costs of the codec and/or to code high dynamic range images. The main insights behind 2SDQ are the use of two quantization step sizes that approximate wavelet coefficients with more or less precision depending on their density, and a rate-distortion optimization technique that adjusts the distortion decreases produced when coding 2SDQ indexes. The integration of 2SDQ in current codecs is straightforward. The applicability and efficiency of 2SDQ are demonstrated within the framework of JPEG2000.
Nota: Número d'acord de subvenció MICINN/RYC-2010-05671
Nota: Número d'acord de subvenció MINECO/TIN2012-38102-C03-03
Nota: Número d'acord de subvenció AGAUR/2009-SGR-1224
Drets: Tots els drets reservats
Llengua: Anglès
Document: article ; recerca ; submittedVersion
Matèria: 2-step scalar deadzone quantization ; General embedded quantization ; Bitplane image coding ; JPEG2000
Publicat a: IEEE Transactions on Image Processing, Vol. 22, Issue 12 (Dec. 2013) , p. 4678-4688, ISSN 1057-7149

DOI: 10.1109/TIP.2013.2277801

12 p, 424.2 KB

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Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Enginyeries > Group on Interactive Coding of Images (GICI)
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 Registre creat el 2015-02-26, darrera modificació el 2016-06-04

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