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

Author

Bi, M. ; Ong, Sim-Heng ; Ang, Yew-Hock

Author_Institution

Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore

Volume

10

Issue

8

fYear

2000

fDate

12/1/2000 12:00:00 AM

Firstpage

1471

Lastpage

1477

Abstract

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

Keywords

adaptive codes; channel bank filters; data compression; digital simulation; discrete cosine transforms; filtering theory; image coding; image segmentation; transform coding; M-channel filter banks; M-channel subband decomposition; compression performance; hybrid shape-adaptive orthogonal transform; image segments coding; image transform; region-based dyadic wavelet transform; region-based image coding; shape-adaptive DCT coding; signal extension method; simulation results; Bismuth; Discrete cosine transforms; Discrete wavelet transforms; Filter bank; Image coding; Image segmentation; Polynomials; Shape; Transform coding; Wavelet transforms;

fLanguage

English

Journal_Title

Circuits and Systems for Video Technology, IEEE Transactions on

Publisher

ieee

ISSN

1051-8215

Type

jour

DOI

10.1109/76.889054

Filename

889054