Unsupervised constrained radar imaging of low resolution targets

Semichaevsky, Andrey; Testorf, Markus E.; McGahan, R.V.; Fiddy, Michael A.

doi:10.1088/0959-7174/14/2/016

Cited by 3 publications

(2 citation statements)

References 31 publications

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“…A few years later, in 2001, our own scattering measurements were a good motivation for a first special section in this same journal. Nowadays, considering (i) that some recent publications are still exploiting the Ipswich data (Semichaevsky et al 2004), (ii) the still increasing number of citations of articles describing the Institut Fresnel's experimental data Saillard 2001, Belkebir et al 2000), (iii) the number of groups asking for information about those data, (iv) the different requests of researchers already involved in the first section (some remarks having even been made during the constitution of the first special issue), (v) and the demands of people recently using the first part of the Institut Fresnel's database, it has been decided to add measurements of fields diffracted by other targets to the database with both TE and TM polarization for each target and objects mixing dielectrics or dielectrics and metals.…”

Section: Introductionmentioning

confidence: 99%

Free space experimental scattering database continuation: experimental set-up and measurement precision

Geffrin¹,

Sabouroux²,

Eyraud³

2005

Inverse Problems

295

205

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In the present paper, the experimental set-up of Institut Fresnel used to measure the scattered fields of different elongated objects is precisely described. Since the special issue on ‘Testing inversion algorithms against experimental data’, the modifications of this system, outlined here, have mostly been done to improve the synchronization of the apparatuses and the precision of our measurements. Due to a large number of requests from the inverse problem community, it has been decided to add new measurements to the Institut Fresnel's database. All the new targets presented here are two-dimensional inhomogeneous ones. They are made of different dielectrics or are mixing metal and dielectric parts. Both TE and TM polarizations are measured for each target, from 2 to 10 GHz and even 18 GHz for the most complex target. In the first part of this paper the set-up is described precisely. The second part is devoted to the presentation of the targets. Finally, some TE and TM comparisons of measurements and direct problem simulations are shown to accredit our experimental method and to give an idea of the accuracy of these measurements.

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Section: Introductionmentioning

confidence: 99%

Free space experimental scattering database continuation: experimental set-up and measurement precision

Geffrin¹,

Sabouroux²,

Eyraud³

2005

Inverse Problems

295

205

View full text Add to dashboard Cite

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“…In this context the PDFT algorithm is applicable to diffraction tomography 21 and synthetic aperture radar applications. [22][23][24] Equations (12), (16), and (17) provide us with a closed-form solution to the estimation problem. In particular, for small data sets this formulation of the PDFT results in a computationally attractive algorithm.…”

Section: The Pdft Algorithmmentioning

confidence: 99%

Improved image reconstruction from multiple frames

Testorf

Fiddy

2006

Image Reconstruction From Incomplete Data IV

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A method is described for reconstructing images from incomplete data sets if subsets of the data are obtained with different data acquisition systems. The proposed method is able to incorporate prior information about the object into the reconstruction process. The general scheme is applied to construct improved images from multiple low resolution frames of the same scene, where each frame is obtained with an imaging system characterized by a different response function. The working principle is demonstrated with synthetic data for a set of generic imaging systems. Additional attention is given to the potential of the inherent superresolution capabilities of this method in the context of compressed image representations.

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