Image Reconstruction from Sparse Irregular Intensity Interferometry Measurements of Fourier Magnitude

reportActive / Technical Report | Accession Number: ADA591372 | Open PDF

Abstract:

A forward model-based algorithm for reconstructing images from Fourier domain measurements is described. The model accurately treats broadening of the Fourier domain sampling function resulting from finite aperture size and spectral bandwidth. The forward modeling approach also allows weighting of measurements according to their individual signal-to-noise ratios SNRs, and injection of a priori expectations about the object such as its support and power spectral density. Image quality performance of a large telescope array is analyzed as a function of SNR and array scale. The approach is designed to enable joint processing of mixtures of intensity and amplitude interferometric measurements and conventional incoherent images, but the focus of this paper is limited to intensity interferometry. Basic structures of the object are seen to be recovered as SNR approaches 10 for unity coherence.

Author(s):
Gerwe, David R. ; Dolne, J. J. ; Crabtree, Peter N. ; Holmes, Richard B. ; Calef, Brandoch
Author Organization(s):
AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH
Descriptive Note:
Conference paper
Supplementary Note:
Presented at the AMOS (Advanced Maui Optical and Space Surveillance) Technical Conference held in Maui, HI on 10-13 Sep 2013. Prepared in cooperation with Boeing Phantom Works Space & Intelligence Systems, Seattle, WA and Boeing Laser Technical Services, Colorado Springs, CO.
Pagination:
0015

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Contract/Grant Number(s):
FA9453-12-C-0129
Monitor Series:
AFRL
 Subject Terms
Joint Capability Areas:
JCA_2.2.1_Signals Collection; JCA_2.2_Collection; JCA_5_Command and Control
Modernization Areas:
Space
Communities of Interest:
Sensors
Descriptor(s):
*ALGORITHMS, *IMAGE RECONSTRUCTION, *INTERFEROMETRY, AMPLITUDE, APERTURES, ARRAYS, BANDWIDTH, FUNCTIONS(MATHEMATICS), INTENSITY, PROBABILITY DENSITY FUNCTIONS, SIGNAL TO NOISE RATIO, TELESCOPES
Field(s)/Group(s):
Numerical Mathematics, Cybernetics, Photography, Optics
Keyword(s):
INTENSITY INTERFEROMETRY MEASUREMENTS, FOURIER MAGNITUDE, FOURIER DOMAIN, FINITE APERTURE SIZE, SPECTRAL BW, BW(BANDWIDTH), SNR(SIGNAL TO NOISE RATIO), SPECTRAL DENSITY, LARGE TELESCOPE ARRAYS, MODEL BASED TECHNIQUES, FIIRE(FORWARD MODEL INTERFEROMETRY IMAGE RECONSTRUCTION AND ESTIMATION), MAP(MAXIMUM A POSTERIORI), COST FUNCTIONS, SEARCH ALGORITHMS
Report Date:
2013 Sep 01
Creation Date:
2014 Jan 27