A modified shape descriptor in wavelets compressed domain

Author

Guo, Baofeng ; Jiang, Jianmin

Author_Institution

Dept. of Comput. Sci., Bristol Univ., UK

Volume

1

fYear

2002

fDate

2002

Abstract

In order to implement shape-based image retrieval in the wavelet domain effectively and efficiently, a new method is introduced to improve the moment-based shape descriptor. Firstly, several morphological operations are used to incorporate isolated significant points of a wavelet coefficient domain into a meaningful object region, which leads to a more accurate shape description. Then, by using the invariant properties of certain moments, a compact moment representation method is also proposed to integrate shape information spread at various directional wavelet subbands. Experimental results show that the proposed algorithm outperforms the existing shape-based image retrieval method in the wavelet domain.

Keywords

content-based retrieval; feature extraction; image processing; image retrieval; mathematical morphology; wavelet transforms; compact moment representation; image feature extraction; invariant properties; morphological operations; shape descriptor; shape-based image retrieval; wavelet coefficient domain; wavelet domain; Computer science; Discrete cosine transforms; Feature extraction; Image coding; Image retrieval; Image storage; Information retrieval; Shape; Wavelet coefficients; Wavelet domain;

fLanguage

English

Publisher

ieee

Conference_Titel

Image Processing. 2002. Proceedings. 2002 International Conference on

ISSN

1522-4880

Print_ISBN

0-7803-7622-6

Type

conf

DOI

10.1109/ICIP.2002.1038181

Filename

1038181