Title :
Blocking artefact removal based on frequency analysis
Author :
Huang, Jiwu ; Shi, Yun Q. ; Dai, Xianhua
Author_Institution :
Dept. of Electron. Eng., Shantou Univ., Guangdong, China
fDate :
11/26/1998 12:00:00 AM
Abstract :
An adaptive filtering algorithm for artefact removal in block coded images is presented. Based on an analysis of block artefacts in the frequency domain, the edge image is notch filtered and then used for a neighbourhood analysis. A space-variant filter is applied to the coded image adaptively, dependent on a frequency analysis
Keywords :
adaptive filters; block codes; edge detection; filtering theory; frequency-domain analysis; image coding; image restoration; notch filters; spatial filters; adaptive filtering algorithm; block coded image; blocking artefact removal; edge image; frequency domain analysis; neighbourhood analysis; notch filtering; space-variant filter;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19981609
