Sparse sampling and enhanced axial resolution in millimeter-wave holographic imaging

Christy Fernandez-Cull; David A. Wikner; Michael Mattheiss; Joseph N. Mait; David Brady

doi:10.1117/12.850404

27 April 2010 Sparse sampling and enhanced axial resolution in millimeter-wave holographic imaging

Christy Fernandez-Cull, David A. Wikner, Michael Mattheiss, Joseph N. Mait, David Brady

Proceedings Volume 7670, Passive Millimeter-Wave Imaging Technology XIII; 76700B (2010) https://doi.org/10.1117/12.850404
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

Abstract

This paper describes an active millimeter-wave (MMW) holographic imaging system used for the study of compressive measurement for concealed weapons detection. We record a digitized on-axis, Gabor hologram using a single pixel incoherent receiver that is translated at the detector plane to form an image composite. Capturing measurements in the MMW regime can be costly since receiver circuits are expensive and scanning systems can be plagued by their long data acquisition times. Thus, we leverage recent advances in compressive sensing with a traditional holographic method in order to estimate a 3D (x,y,z) object distribution from a 2D recorded image composite. To do this, we minimize a convex quadratic function using total variation (TV) regularization. Gabor holograms are recorded of semi-transparent objects, in the MMW, mimicking weapons and other objects. We present preliminary results of 3D reconstructions of objects at various depths estimated from a 2D recorded hologram. We compare backpropagation results with our decompressive inference algorithm. A possible application includes remote concealed weapons detection at security checkpoints.

Citation Download Citation

Christy Fernandez-Cull, David A. Wikner, Michael Mattheiss, Joseph N. Mait, and David Brady "Sparse sampling and enhanced axial resolution in millimeter-wave holographic imaging", Proc. SPIE 7670, Passive Millimeter-Wave Imaging Technology XIII, 76700B (27 April 2010); https://doi.org/10.1117/12.850404

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available