Improved POCS-based deblocking technique using wavelet transform in block coded image

Goo Rak Kwon, Hyo Kak Kim, Chun Soo Park, Yoon Kim, Sung Jea Ko

Research output: Chapter in Book/Report/Conference proceedingConference contribution


This paper presents a improved POCS-based deblocking technique, based on the theory of the projection onto convex sets (POCS) to reduce the blocking artifacts in decoded images. We propose a new smoothness constraint set (SCS) and its projection operator in the wavelet transform (WT) domain to remove unnecessary high-frequency components caused by blocking artifacts. In order to eliminate the blocking artifacts component while preserving the original edge component, we also propose a significant coefficient decision method (SCDM)for fast and efficient performance. Experimental results show that the proposed method can not only achieve a significantly enhanced subjective quality but also increase the PSNR improvement in the reconstructed image.

Original languageEnglish
Title of host publicationAdvances in Multimedia Information Processing - PCM 2006
Subtitle of host publication7th Pacific Rim Conference on Multimedia, Proceedings
PublisherSpringer Verlag
Number of pages10
ISBN (Print)3540487662, 9783540487661
Publication statusPublished - 2006
EventPCM 2006: 7th Pacific Rim Conference on Multimedia - Hangzhou, China
Duration: 2006 Nov 22006 Nov 4

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume4261 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


OtherPCM 2006: 7th Pacific Rim Conference on Multimedia

ASJC Scopus subject areas

  • Theoretical Computer Science
  • General Computer Science


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