Phaseless computational imaging with a radiating metasurface
Reads0
Chats0
TLDR
A novel 3D imaging system is conceived based on 'phaseless' and compressed measurements, with benefits from recent advances in the field of phase retrieval, and a comparison of the estimated images from both complex valued and phaseless measurements is presented, verifying the fidelity of Phaseless computational imaging.Abstract:
Computational imaging modalities support a simplification of the active architectures required in an imaging system and these approaches have been validated across the electromagnetic spectrum. Recent implementations have utilized pseudo-orthogonal radiation patterns to illuminate an object of interest---notably, frequency-diverse metasurfaces have been exploited as fast and low-cost alternative to conventional coherent imaging systems. However, accurately measuring the complex-valued signals in the frequency domain can be burdensome, particularly for sub-centimeter wavelengths. Here, computational imaging is studied under the relaxed constraint of intensity-only measurements. A novel 3D imaging system is conceived based on 'phaseless' and compressed measurements, with benefits from recent advances in the field of phase retrieval. In this paper, the methodology associated with this novel principle is described, studied, and experimentally demonstrated in the microwave range. A comparison of the estimated images from both complex valued and phaseless measurements are presented, verifying the fidelity of phaseless computational imaging.read more
Citations
More filters
Journal ArticleDOI
Review of Metasurface Antennas for Computational Microwave Imaging
Mohammadreza F. Imani,Jonah N. Gollub,Okan Yurduseven,Aaron V. Diebold,Michael Boyarsky,Thomas Fromenteze,Laura Pulido-Mancera,Timothy Sleasman,David R. Smith +8 more
TL;DR: It is argued that metamaterial antennas are a near ideal platform for implementing schemes at microwave frequencies and the tradeoffs governing the design and operation of each architecture are examined.
Journal ArticleDOI
Computational polarimetric microwave imaging.
Thomas Fromenteze,Okan Yurduseven,Michael Boyarsky,Jonah N. Gollub,Daniel L. Marks,David R. Smith +5 more
TL;DR: In this article, a frequency-diverse cavity-backed metasurface was proposed for high-resolution polarimetric imaging using a single transceiver and frequency sweep over the operational microwave bandwidth.
Journal ArticleDOI
Phaseless coherent and incoherent microwave ghost imaging with dynamic metasurface apertures
TL;DR: In this paper, the authors investigate the coherence of a phaseless imaging system based on metasurface apertures, which can generate a multitude of distinct speckle fields at a single frequency by modulating the electrical properties of complementary metamaterial elements patterned into the surface of a waveguide.
Journal ArticleDOI
A Transverse Spectrum Deconvolution Technique for MIMO Short-Range Fourier Imaging
Thomas Fromenteze,Okan Yurduseven,Fabien Berland,Cyril Decroze,David R. Smith,Alexander Yarovoy +5 more
TL;DR: This paper presents a new technique called the transverse spectrum deconvolution range migration algorithm allowing us to carry out reconstructions that are both faster and more accurate than with conventional Fourier domain processing techniques.
Journal ArticleDOI
Frequency-Diverse Computational Microwave Phaseless Imaging
TL;DR: A phaseless, frequency-diverse, computational imaging system that operates at K-band frequencies is demonstrated and it is shown that high-fidelity images can be obtained with the metasurface antenna using only the intensity of the measurements by leveraging a sparse variant of the Wirtinger Flow algorithm.
References
More filters
Journal ArticleDOI
Phase retrieval algorithms: a comparison.
TL;DR: Iterative algorithms for phase retrieval from intensity data are compared to gradient search methods and it is shown that both the error-reduction algorithm for the problem of a single intensity measurement and the Gerchberg-Saxton algorithm forThe problem of two intensity measurements converge.
Journal Article
A practical algorithm for the determination of phase from image and diffraction plane pictures
TL;DR: In this article, an algorithm is presented for the rapid solution of the phase of the complete wave function whose intensity in the diffraction and imaging planes of an imaging system are known.
Journal ArticleDOI
A new microscopic principle.
TL;DR: An improvement of the resolution by one decimal wotild require a correction of the objective to four decimals, a practically hopeless task.
Journal ArticleDOI
Reconstruction of an object from the modulus of its Fourier transform.
TL;DR: A digital method for solving the phase-retrieval problem of optical-coherence theory: the reconstruction of a general object from the modulus of its Fourier transform, which should be useful for obtaining high-resolution imagery from interferometer data.
Journal ArticleDOI
Phase Retrieval via Wirtinger Flow: Theory and Algorithms
TL;DR: In this article, a nonconvex formulation of the phase retrieval problem was proposed and a concrete solution algorithm was presented. But the main contribution is that this algorithm is shown to rigorously allow the exact retrieval of phase information from a nearly minimal number of random measurements.
Related Papers (5)
Phaseless Approach to Microwave Biomedical Imaging: System Requirements towards Clinical Applications
Sandra Costanzo,Giuseppe Lopez +1 more