Adaptive filter to improve the performance of phase-unwrapping in digital holography

Francisco Palacios, Edison Gonçalves, Jorge Ricardo, JOSE LUIS VALIN RIVERA

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

A method for the filtering of the phase of fringe pattern to avoid the image corruption effect during the application of the unwrapping process is described. An algorithm is developed using a combination of sine/cosine average filtering with masking filtering techniques, taking as a weighting function of the masks the number of discontinuities by pixels which allows to preserve and intensify the borders of phase fringes of the object and to remove the isolated discontinuities and false phase fringes. The algorithm is tested using phase images obtained by the two wave length contouring holographic method.

Original languageEnglish
Pages (from-to)245-251
Number of pages7
JournalOptics Communications
Volume238
Issue number4-6
DOIs
StatePublished - 15 Aug 2004

Keywords

  • Digital holography
  • Filter
  • Holographic contouring
  • Phase fringe pattern
  • Phase unwrapping

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