Speckle reduction by I-divergence regularization in optical coherence tomography.

Journal Article (Journal Article)

For optical coherence tomography (OCT), ultrasound, synthetic-aperture radar, and other coherent ranging methods, speckle can cause spurious detail that detracts from the utility of the image. It is a problem inherent to imaging densely scattering objects with limited bandwidth. Using a method of regularization by minimizing Csiszar's I-divergence measure, we derive a method of speckle minimization that produces an image that both is consistent with the known data and extrapolates additional detail based on constraints on the magnitude of the image. This method is demonstrated on a test image and on an OCT image of a Xenopus laevis tadpole.

Full Text

Duke Authors

Cited Authors

  • Marks, DL; Ralston, TS; Boppart, SA

Published Date

  • November 2005

Published In

Volume / Issue

  • 22 / 11

Start / End Page

  • 2366 - 2371

PubMed ID

  • 16304722

Pubmed Central ID

  • 16304722

Electronic International Standard Serial Number (EISSN)

  • 1520-8532

International Standard Serial Number (ISSN)

  • 1084-7529

Digital Object Identifier (DOI)

  • 10.1364/josaa.22.002366


  • eng