Noise reduction in digital holography based on a filtering algorithm

Wenhui Zhang, Liangcai Cao, Hua Zhang, Guofan Jin, David Brady

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

1 Scopus citations


Holography is a tool to record the object wavefront by interference. Complex amplitude of the object wave is coded into a two dimensional hologram. Unfortunately, the conjugate wave and background wave would also appear at the object plane during reconstruction, as noise, which blurs the reconstructed object. From the perspective of wave, we propose a filtering algorithm to get a noise-reduced reconstruction. Due to the fact that the hologram is a kind of amplitude grating, three waves would appear when reconstruction, which are object wave, conjugate wave and background wave. The background is easy to eliminate by frequency domain filtering. The object wave and conjugate wave are signals to be dealt with. These two waves, as a whole, propagate in the space. However, when detected at the original object plane, the object wave would diffract into a sparse pattern while the conjugate wave would diffract into a diffused pattern forming the noise. Hence, the noise can be reduced based on these difference with a filtering algorithm. Both amplitude and phase distributions are truthfully retrieved in our simulation and experimental demonstration.

Original languageEnglish (US)
Title of host publicationQuantitative Phase Imaging IV
EditorsYongKeun Park, Gabriel Popescu
ISBN (Electronic)9781510614918
StatePublished - 2018
Externally publishedYes
EventQuantitative Phase Imaging IV 2018 - San Francisco, United States
Duration: Jan 28 2018Jan 30 2018

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
ISSN (Print)1605-7422


ConferenceQuantitative Phase Imaging IV 2018
Country/TerritoryUnited States
CitySan Francisco


  • Holography
  • Image processing
  • Noise reduction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Biomaterials
  • Radiology Nuclear Medicine and imaging


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