IEEE Trans Image Process - Generalized block-lifting factorization of M-channel biorthogonal filter banks for lossy-to-lossless image coding.

Tópicos

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Resumo

Generalized block-lifting factorization of M-channel (M > 2) biorthogonal filter banks (BOFBs) for lossy-to-lossless image coding is presented in this paper. Since the proposed block-lifting structure is more general than the conventional lifting factorizations and does NOT require many restrictions such as paraunitary, number of channels, and McMillan degree in each building block unlike the conventional lifting factorizations, its coding gain is higher than that of the previous methods. Several proposed BOFBs are designed and applied to image coding. Comparing the results with conventional lossy-to-lossless image coding structures, including the 5/3- and 9/7-tap discrete wavelet transforms in JPEG 2000 and a 4 ? 8 hierarchical lapped biorthogonal transform in JPEG XR, the proposed BOFBs achieve better result in both objective measure and perceptual visual quality for the images with a lot of high-frequency components.

Resumo Limpo

general blocklift factor mchannel m biorthogon filter bank bofb lossytolossless imag code present paper sinc propos blocklift structur general convent lift factor requir mani restrict paraunitari number channel mcmillan degre build block unlik convent lift factor code gain higher previous method sever propos bofb design appli imag code compar result convent lossytolossless imag code structur includ tap discret wavelet transform jpeg hierarch lap biorthogon transform jpeg xr propos bofb achiev better result object measur perceptu visual qualiti imag lot highfrequ compon

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