|
Exploiting spatial sparsity for multiwavelength imaging in optical interferometry |
JOSA A, Vol. 30, Issue 2, pp. 160-170 (2013)
http://dx.doi.org/10.1364/JOSAA.30.000160
Enhanced HTML 
Acrobat PDF (853 KB)
Abstract
Optical interferometers provide multiple wavelength measurements. In order to fully exploit the spectral and spatial resolution of these instruments, new algorithms for image reconstruction have to be developed. Early attempts to deal with multichromatic interferometric data have consisted in recovering a gray image of the object or independent monochromatic images in some spectral bandwidths. The main challenge is now to recover the full three-dimensional (spatiospectral) brightness distribution of the astronomical target given all the available data. We describe an approach to implement multiwavelength image reconstruction in the case where the observed scene is a collection of point-like sources. We show the gain in image quality (both spatially and spectrally) achieved by globally taking into account all the data instead of dealing with independent spectral slices. This is achieved thanks to a regularization that favors spatial sparsity and spectral grouping of the sources. Since the objective function is not differentiable, we had to develop a specialized optimization algorithm that also accounts for non-negativity of the brightness distribution.
© 2013 Optical Society of America
OCIS Codes
(100.3190) Image processing : Inverse problems
(100.3175) Image processing : Interferometric imaging
(100.4145) Image processing : Motion, hyperspectral image processing
ToC Category:
Image Processing
History
Original Manuscript: September 12, 2012
Revised Manuscript: November 30, 2012
Manuscript Accepted: December 3, 2012
Published: January 8, 2013
Citation
Éric Thiébaut, Ferréol Soulez, and Loïc Denis, "Exploiting spatial sparsity for multiwavelength imaging in optical interferometry," J. Opt. Soc. Am. A 30, 160-170 (2013)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-30-2-160
You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Log in to access OSA Member Subscription
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Log in to access OSA Member Subscription
You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Log in to access OSA Member Subscription
You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Log in to access OSA Member Subscription
Related Journal Articles 
- Second-order iterative approach to inverse scattering: numerical results (JOSAA)
- Electromagnetic degrees of freedom of an optical system (JOSAA)
- Frame-theory-based approach for determining the time–frequency distribution characterizing a dense group of reflecting objects (JOSAA)
- In situ measurement and reconstruction in three dimensions of femtosecond inscription-induced complex permittivity modification in glass (OL)
- Time-resolved quantitative multiphase interferometric imaging of a highly focused ultrasound pulse (AO)
Related Conference Papers
- Off-Axis Adaptive Optics with Optimal Control: Laboratory Validation
- Joint Estimation of Amplitude and Phase from Phase-Diversity Data
- Block-Processing Method for Post-Detection Correction of Anisoplanatic Adaptive Optics Images
- Information-Theoretic Metrics for Quantifying PSF Quality
- Information-Theoretic Metrics for Quantifying PSF Quality
« Previous Article | Next Article »
OSA is a member of 