Wave front distortion based fluid flow imaging

Emishaw Iffa, Wolfgang Heidrich

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


In this paper, a transparent flow surface reconstruction based on wave front distortion is investigated. A camera lens is used to focus the image formed by the micro-lens array to the camera imaging plane. The irradiance of the captured image is transformed to frequency spectrum and then the x and y spatial components are separated. A rigid spatial translation followed by low pass filtering yields a single frequency component of the image intensity. Index of refraction is estimated from the inverse Fourier transform of the spatial frequency spectrum of the irradiance. The proposed method is evaluated with synthetic data of a randomly generated index of refraction value and used to visualize a fuel injection volumetric data.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE-IS and T Electronic Imaging - Image Processing
Subtitle of host publicationMachine Vision Applications VI
StatePublished - 2013
Externally publishedYes
EventImage Processing: Machine Vision Applications VI - Burlingame, CA, United States
Duration: Feb 5 2013Feb 6 2013

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherImage Processing: Machine Vision Applications VI
Country/TerritoryUnited States
CityBurlingame, CA


  • Flow visualization
  • Fourier demodulation
  • Index of refraction
  • Light field
  • Transparent flow
  • Wavefront reconstruction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


Dive into the research topics of 'Wave front distortion based fluid flow imaging'. Together they form a unique fingerprint.

Cite this