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A hybrid shape-adaptive orthogonal transform for coding of image segments

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3 Author(s)
Bi, M. ; Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore ; Sim-Heng Ong ; Yew-Hock Ang

Improvements in the compression performance can be achieved if the image transform is able to adapt to the shape of the objects present. We propose a new hybrid shape-adaptive orthogonal transform which is based on M-channel subband decomposition and shape-adaptive DCT techniques. The signal extension method for the region-based dyadic wavelet transform is applied to region-based image coding using M-channel filter banks. Simulation results show that the proposed method outperforms shape-adaptive DCT coding

Published in:

Circuits and Systems for Video Technology, IEEE Transactions on  (Volume:10 ,  Issue: 8 )

Date of Publication:

Dec 2000

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