Studies of Quantitative Methods for Imaging from Scattered Fields

Abstract

The analysis of the advantages and disadvantages of the homomorphic filtering technique applied to solve the exact inverse scattering problem has continued. There have been problems with strongly scattering objects due to phase unwrapping. Work has continued to more carefully compare the reconstruction of V(Psi) from the backpropagation of simulated data with that predicted for the direct problem, from the same data. We note that phase unwrapping is avoided with the differential cepstrum; we believe that there might be an interesting connection between this and a novel differential formalism for the Rytov approximation. This report focuses mainly on new developments in modelling scattering from nonlinear media. In anticipation of the next phase of this project, namely to consider the inverse scattering problem for nonlinear media, we have been studying the writing of structures into nonlinear media, specifically photorefractive crystals.

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Document Details

Document Type
Technical Report
Publication Date
Apr 15, 1992
Accession Number
ADA250414

Entities

People

  • M. A. Fiddy

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Algorithms
  • Electrical Engineering
  • Engineering
  • Equations
  • Far Field
  • Images
  • Inverse Problems
  • Inverse Scattering
  • Laser Beams
  • Lasers
  • Optical Images
  • Plane Waves
  • Scattering
  • Spatial Distribution
  • Technical Information Centers
  • Three Dimensional
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Image Processing and Computer Vision.
  • Optical Physics and Photonics.