Blocking artifacts removal with a successive structure analysis using wavelet transform

Author

Law, Ngai-Fong ; Siu, Wan-chi

Author_Institution

Dept. of Electron. & Inf. Eng., Hong Kong Polytech. Univ., Kowloon, Hong Kong

fYear

1999

fDate

1999

Firstpage

75

Lastpage

78

Abstract

A successive structural analysis using the wavelet is proposed to remove the block artifacts associated with block-based coding such as JPEG. The analysis is based on the different responses of block boundaries (constrained by quantization), and the structural information about an image in wavelet domain. In particular, information about an image is divided into a few bands according to their responses in wavelet domain. A metric is then proposed to quantify the quality of information in each band. As simulation results show, block artifacts are removed effectively by the proposed algorithm

Keywords

image coding; quantisation (signal); transform coding; wavelet transforms; JPEG; block boundaries; block-based coding; blocking artifacts removal; image coding; image structural information; quantization; simulation results; space-frequency filtering; successive structure analysis; wavelet domain response; wavelet transform; Discrete cosine transforms; Discrete transforms; Frequency; Image coding; Karhunen-Loeve transforms; Quantization; Signal processing algorithms; Wavelet analysis; Wavelet domain; Wavelet transforms;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, Computers and Signal Processing, 1999 IEEE Pacific Rim Conference on

Conference_Location

Victoria, BC

Print_ISBN

0-7803-5582-2

Type

conf

DOI

10.1109/PACRIM.1999.799481

Filename

799481