IEEE Trans Image Process - Boundary operation of 2-D nonseparable linear-phase paraunitary filter banks.

Tópicos

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Resumo

This paper proposes a boundary operation technique of 2-D nonseparable linear-phase paraunitary filter banks (NS-LPPUFBs) for size limitation. The proposed technique is based on a lattice structure consisting of the 2-D separable block discrete cosine transform and nonseparable support-extension processes. The bases are allowed to be anisotropic with the fixed critically subsampling, overlapping, orthogonal, symmetric, real-valued, and compact-support properties. First, the blockwise implementation is developed so that the basis images can be locally controlled. The local control of basis images is shown to maintain orthogonality. This property leads a basis termination (BT) technique as a boundary operation. The technique overcomes the drawback of NS-LPPUFBs that the popular symmetric extension method is invalid. Through some experimental results of diagonal texture coding, the significance of the BT is verified.

Resumo Limpo

paper propos boundari oper techniqu d nonsepar linearphas paraunitari filter bank nslppufb size limit propos techniqu base lattic structur consist d separ block discret cosin transform nonsepar supportextens process base allow anisotrop fix critic subsampl overlap orthogon symmetr realvalu compactsupport properti first blockwis implement develop basi imag can local control local control basi imag shown maintain orthogon properti lead basi termin bt techniqu boundari oper techniqu overcom drawback nslppufb popular symmetr extens method invalid experiment result diagon textur code signific bt verifi

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