High-resolution 3-D imaging of objects through walls

Richard S. Schechter; Sung-Taek Chun

doi:10.1117/1.3509364

1 November 2010 High-resolution 3-D imaging of objects through walls

Richard S. Schechter, Sung-Taek Chun

Author Affiliations +

Optical Engineering, Vol. 49, Issue 11, 113204 (November 2010). https://doi.org/10.1117/1.3509364

Abstract

This paper describes the use of microwaves to accurately image objects behind dielectric walls. The data are first simulated by using a finite-difference time-domain code. A large model of a room with walls and objects inside is used as a test case. Since the model and associated volume are big compared to wavelengths, the code is run on a parallel supercomputer. A fixed 2-D receiver array captures all the return data simultaneously. A time-domain backprojection algorithm with a correction for the time delay and refraction caused by the front wall then reconstructs high-fidelity 3-D images. A rigorous refraction correction using Snell's law and a simpler but faster linear correction are compared in both 2-D and 3-D. It is shown that imaging in 3-D and viewing an image in the plane parallel to the receiver array is necessary to identify objects by shape. It is also shown that a simple linear correction for the wall is sufficient.

©(2010) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Richard S. Schechter and Sung-Taek Chun "High-resolution 3-D imaging of objects through walls," Optical Engineering 49(11), 113204 (1 November 2010). https://doi.org/10.1117/1.3509364

Published: 1 November 2010

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