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Scattering And Absorption of Light in Planetary Regoliths
11:34

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Published on: July 1, 2019

Image formation with regard to object shadow for objects inside a scattering medium.

I L Katsev1, E P Zege, A S Prikhach

  • 1Institute of Physics, Belarus Academy of Sciences, pr F Scorina 68, Minsk 220072, Belarus.

Applied Optics
|March 8, 2008
PubMed
Summary

Image transfer theory must account for shadowing within scattering media. Ignoring this effect leads to errors, especially in time-gating systems, suggesting shadow imaging offers superior detection of submerged objects.

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Area of Science:

  • Optics
  • Image processing
  • Scattering media

Background:

  • Conventional image transfer theory assumes objects are on reflecting surfaces.
  • Ignoring shadowing within scattering media causes inaccuracies, particularly for time-gating systems.

Purpose of the Study:

  • Develop a general theory for image formation within scattering media that includes shadowing.
  • Investigate unexpected imaging effects and their practical implications.

Main Methods:

  • Formulated a new theory of image formation incorporating shadowing effects.
  • Applied the theory to model imaging of submerged objects through a windy ocean surface.

Main Results:

  • Identified contrast conversion for sinking objects.
  • Observed higher contrast in shadow images than in object images.
  • Demonstrated the significance of shadowing in image transfer.

Conclusions:

  • The developed theory accurately describes image formation with internal shadowing.
  • Shadow imaging can be more effective for detecting submerged objects than direct object imaging.