Progressive switching median filter for the removal of impulse noise from highly corrupted images

Zhou Wang, Dapeng Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

814 Citations (Scopus)


A new median-based filter, progressive switching median (PSM) filter, is proposed to restore images corrupted by salt-pepper impulse noise. The algorithm is developed by the following two main points: 1) switching scheme-an impulse detection algorithm is used before filtering, thus only a proportion of all the pixels will be filtered and 2) progressive methods-both the impulse detection and the noise filtering procedures are progressively applied through several iterations. Simulation results demonstrate that the proposed algorithm is better than traditional median-based filters and is particularly effective for the cases where the images are very highly corrupted.
Original languageEnglish
Pages (from-to)78-80
Number of pages3
JournalIEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing
Issue number1
Publication statusPublished - 1 Dec 1999


  • Image enhancement
  • Impulse detection
  • Median filter
  • Nonlinear filter

ASJC Scopus subject areas

  • Signal Processing
  • Electrical and Electronic Engineering

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