Arbitrary shape wavelet transform with phase alignment

Author

Li, Jin ; Lei, Shawmin

Author_Institution

Sharp Labs., Digital Video, Camas, WA, USA

fYear

1998

fDate

4-7 Oct 1998

Firstpage

683

Abstract

We propose a wavelet transform for an arbitrary shape object. Compared with previous schemes, the proposed transform generates exactly the same number of coefficients as that of the original object. What is more, the phase of the horizontal wavelet filter is aligned so that the subsequent vertical transform is applied on coefficients with coherent phases and thus the transform efficiency is improved. We denote the scheme as the arbitrary shape wavelet transform with phase alignment (ASWP). The scheme was proposed at the MPEG4 meeting at Stockholm in July 1997, and was adopted by MPEG4 CD version 1 for wavelet transform of an arbitrary shape object

Keywords

code standards; data compression; filtering theory; image coding; telecommunication standards; transform coding; wavelet transforms; MPEG4 CD version 1; arbitrary shape wavelet transform; coefficients; coherent phases; horizontal wavelet filter; image compression; phase alignment; transform efficiency; vertical transform; Application software; Discrete cosine transforms; Filters; Games; Image coding; Laboratories; MPEG 4 Standard; Pixel; Shape; Wavelet transforms;

fLanguage

English

Publisher

ieee

Conference_Titel

Image Processing, 1998. ICIP 98. Proceedings. 1998 International Conference on

Conference_Location

Chicago, IL

Print_ISBN

0-8186-8821-1

Type

conf

DOI

10.1109/ICIP.1998.727352

Filename

727352