Image restoration of JPEG encoded images via block matching and wiener filtering

Yutaka Takagi, Takanori Fujisawa, Masaaki Ikehara

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In this paper, we propose a method for removing block noise which appears in JPEG (Joint Photographic Experts Group) encoded images. We iteratively perform the 3D wiener filtering and correction of the coefficients. In the wiener filtering, we perform the block matching for each patch in order to get the patches which have high similarities to the reference patch. After wiener filtering, the collected patches are returned to the places where they were and aggregated. We compare the performance of the proposed method to some conventional methods, and show that the proposed method has an excellent performance.

Original languageEnglish
Pages (from-to)1993-2000
Number of pages8
JournalIEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
VolumeE100A
Issue number9
DOIs
Publication statusPublished - 2017 Sep 1

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Keywords

  • Block matching
  • Block noise
  • Discrete cosine transform
  • JPEG
  • Minimiza-tion problem
  • RGB color space
  • Signification
  • Wiener filter
  • YCbCR color space

ASJC Scopus subject areas

  • Signal Processing
  • Computer Graphics and Computer-Aided Design
  • Applied Mathematics
  • Electrical and Electronic Engineering

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