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Related Experiment Video

Updated: May 18, 2026

Digital Inline Holographic Microscopy (DIHM) of Weakly-scattering Subjects
10:16

Digital Inline Holographic Microscopy (DIHM) of Weakly-scattering Subjects

Published on: February 8, 2014

Reconstruction of hidden 3D shapes using diffuse reflections.

Otkrist Gupta1, Thomas Willwacher, Andreas Velten

  • 1MIT Media Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

Optics Express
|October 6, 2012
PubMed
Summary
This summary is machine-generated.

Researchers can reconstruct hidden 3D scenes using multi-bounce light propagation. This method uses secondary scattering and backpropagation to reveal details invisible to direct observation, enabling "around the corner" imaging.

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Related Experiment Videos

Last Updated: May 18, 2026

Digital Inline Holographic Microscopy (DIHM) of Weakly-scattering Subjects
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Published on: February 8, 2014

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Published on: September 28, 2019

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Area of Science:

  • Optics and Photonics
  • Computational Imaging
  • 3D Reconstruction

Background:

  • Direct line-of-sight imaging is limited in occluded environments.
  • Understanding light interaction with complex scenes is crucial for advanced sensing.

Purpose of the Study:

  • To develop a method for reconstructing 3D scene geometry from multi-bounce light.
  • To investigate the theoretical framework of secondary scattering for imaging.

Main Methods:

  • Formulation of forward and inverse secondary scattering theory.
  • Application of energy front propagation and tomography principles.
  • Utilizing Fresnel approximation and backpropagation for inversion.

Main Results:

  • Demonstrated that reflected light contains sufficient information for 3D structure recovery.
  • Showcased invertibility, uniqueness, and dimensional analysis using synthetic data.
  • Validated reconstruction of hidden geometry with a 2D streak camera.

Conclusions:

  • Multi-bounce light analysis enables non-line-of-sight 3D scene reconstruction.
  • The developed backpropagation method effectively recovers hidden shapes.
  • High-speed cameras can achieve "around the corner" 3D imaging.