Explicit coherence enhancing filter with spatial adaptive elliptical kernel

Fang Li*, Ling Pi, Tieyong Zeng

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

19 Citations (Scopus)


The goal of this letter is to provide an elliptical filter to improve image coherence for the task of image smoothing and inpainting. The kernel of this filter is adaptively weighted and its shape is determined by local coherence estimation. The long axis of its ellipse is the same as the coherence direction and we put more weight there to enhance coherence. Compared with the related anisotropic partial differential equations (PDEs) or wavelet shrinkage methods, the proposed filter is extremely simple, instinctive and easy to code. Numerical examples and comparisons illustrate clearly the good performance of the proposed filter.

Original languageEnglish
Article number6227335
Pages (from-to)555-558
Number of pages4
JournalIEEE Signal Processing Letters
Issue number9
Publication statusPublished - Sept 2012

Scopus Subject Areas

  • Signal Processing
  • Electrical and Electronic Engineering
  • Applied Mathematics

User-Defined Keywords

  • Coherence
  • elliptical kernel
  • inpainting
  • structure tensor


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