OpticsInfoBase

Lensless Coherent Imaging with Shaped Illumination and Phase-Retrieval Image Reconstruction

• Abstract
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• Signal Recovery and Synthesis (SRS) 2005 paper: JMA1
• Technical Digest
• Fienup, James R
• One can decrease the complexity of imaging optics by increasing the demands on the illumination system or on post-detection computations. A lens-less coherent imaging system...

Extended-Resolution Reconstruction of Structured Illumination Microscopy Data

• Abstract
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• Signal Recovery and Synthesis (SRS) 2005 paper: JMA2
• Technical Digest
• Gustafsson, Mats
• Microscope resolution can be extended through structured illumination followed by linear data processing. The possible resolution increase, determined by the highest spatial...

Probing Random Media with Singular Beams

• Abstract
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• Signal Recovery and Synthesis (SRS) 2005 paper: JMA3
• Technical Digest
• Schwartz, Chaim; Dogariu, Aristide
• Optical fields containing phase singularities provide additional capabilities in studying random media. Coherent backscattering of such fields will be thoroughly discussed for the...

The Quantized Cosine Transform for Sensor-Layer Image Compression

• Abstract
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• Signal Recovery and Synthesis (SRS) 2005 paper: JMA4
• Technical Digest
• Pitsianis, Nikos P; Brady, David J; Sun, Xiaobai
• We introduce a compressive encoding at the sensor layer based on the quantized cosine transform. Compression at the physical layer of integrated imaging systems reduces the...

Post-Coronagraph Wavefront Sensing Using Pupil Imaging and Phase-Diversity

• Abstract
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• Signal Recovery and Synthesis (SRS) 2005 paper: JTuB1
• Technical Digest
• Green, Joseph J; Niessner, Albert F; Shaklan, Stuart B
• We present an efficient wavefront sensing approach for coronagraphic imaging systems. By measuring the pupil intensity after a coronagraph while known phase errors are injected, the...

Fast, Robust Algorithms for Wavefront Reconstruction under Weak Turbulence Conditions

• Abstract
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• Signal Recovery and Synthesis (SRS) 2005 paper: JTuB2
• Technical Digest
• Vogel, Curt
• We review preconditioned conjugate gradient approaches for the robust, efficient solution of large linear systems of equations that arise in wavefront reconstruction for extremely...

Wavefront Amplitude and Phase Correction for High Contrast Imaging Using Fourier Decomposition

• Abstract
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• Signal Recovery and Synthesis (SRS) 2005 paper: JTuB3
• Technical Digest
• Give'on, Amir; Kasdin, Jeremy N; Vanderbei, Robert J
• Phase conjugation does not achieve the dark nulls needed for high-contrast imaging. We present an alternative optimized solution for the shaping of the deformable mirror based on the...

Joint Estimation of Amplitude and Phase from Phase-Diversity Data

• Abstract
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• Signal Recovery and Synthesis (SRS) 2005 paper: JTuB4
• Technical Digest
• Seldin, John H; Paxman, Richard G
• We present the problem of jointly estimating wavefront amplitude and phase from phase-diversity data and provide simulation examples.

The Application of Deconvolution to Adaptive Optics Retinal Images

• Abstract
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• Signal Recovery and Synthesis (SRS) 2005 paper: JTuC1
• Technical Digest
• Christou, Julian C
• Adaptive optics images of the human retina can be improved using wavefront derived point spread functions (PSF). Errors in these PSFs call for wavefront sensing constraints to be...

Retinal Motion Tracking in Adaptive Optics Scanning Laser Ophthalmoscopy

• Abstract
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• Signal Recovery and Synthesis (SRS) 2005 paper: JTuC2
• Technical Digest
• Vogel, Curt; Arathorn, David; Parker, Albert; Roorda, Austin
• We apply a novel computational technique known as the map-seeking circuit algorithm to track retinal motion from a sequence of frames of data from a scanning laser opthalmoscope.

A New Technique to Study Anisoplanatic AO Images of Crowded Fields

• Abstract
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• Signal Recovery and Synthesis (SRS) 2005 paper: JTuC3
• Technical Digest
• Pugliese, Giovanna; Bonaccini Calia, Domenico; De Marchi, Guido; Paresce, Francesco
• We address the problem of astrometry and photometry in presence of anisoplanatism in very crowded fields with adaptive optics data. We present a data reduction technique that...

Block-Processing Method for Post-Detection Correction of Anisoplanatic Adaptive Optics Images

• Abstract
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• Signal Recovery and Synthesis (SRS) 2005 paper: JTuC4
• Technical Digest
• Aubailly, Mathieu; Roggemann, Michael C
• AO systems are effective for narrow field of view. We propose a post-processing method to reduce the effects of anisoplanatism in wide FOV AO images. The off-axis point-spread...

Synthesis of Strongly Scattering Structures

• Abstract
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• Signal Recovery and Synthesis (SRS) 2005 paper: SMA1
• Technical Digest
• Fiddy, Michael A; Kanaev, Andrey; Shahid, Umer; Testorf, Markus
• A nonlinear filtering technique for inverse scattering is applied to the structure synthesis problem. The method is used with data from known structures to modify their scattering...

Computing the 3-D Structure of Viruses from Electron Microscope Images

• Abstract
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• Signal Recovery and Synthesis (SRS) 2005 paper: SMA2
• Technical Digest
• Lee, Junghoon; Zheng, Yili; Doerschuk, Peter C; Tang, Jinghua; Johnson, John E
• Statistical methods for computing multiple 3-D reconstructions from cryo electron microscope images (noisy 2-D projections in unknown orientations) of mixtures of assembly mutants of...

Three-Dimensional Shape-Based Imaging in Diffuse Optical Tomography Using Spherical Harmonics

• Abstract
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• Signal Recovery and Synthesis (SRS) 2005 paper: SMA3
• Technical Digest
• Boverman, Gregory; Miller, Eric L; Boas, David A
• We reconstruct polar three-dimensional shapes in Diffuse Optical Tomography using a basis of spherical harmonics. We also show how to efficiently compute the derivative of our...

Recovery of Myosin Filament Positions in Muscle Electron Micrographs

• Abstract
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• Signal Recovery and Synthesis (SRS) 2005 paper: SMA4
• Technical Digest
• Millane, Rick P; Yoon, Chun Hong; Bones, Philip J
• Location of myosin filaments in electron micrographs of muscle cross-sections is difficult because of contrast variations and noise. Two algorithms that incorporate a priori...

Blur Identification Using Image Features

• Abstract
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• Signal Recovery and Synthesis (SRS) 2005 paper: SMA5
• Technical Digest
• Bones, Philip; Millane, Rick P; Bretschneider, Timo R
• Two forms of deconvolution are applied to estimate the line spread function (a projection of the PSF) from image features able to be modelled by a combination of two step functions.

Resolution and Its Enhancements in Imaging

• Abstract
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• Signal Recovery and Synthesis (SRS) 2005 paper: SMB1
• Technical Digest
• Milanfar, Peyman
• We present a definition and analysis of the concept of resolution and its enhancement in imaging based on statistical detection and estimation. We also present solutions to the...

Correcting Color Images for Stray-Light Effects by Computationally Solving an Inverse Problem via Selected-Ordinate Image (SORI) Processing

• Abstract
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• Signal Recovery and Synthesis (SRS) 2005 paper: SMB2
• Technical Digest
• Jansson, Peter A; Bitlis, Burak; Allebach, Jan P
• Even small amounts of stray light adversely affect digital-camera color fidelity. We correct camera images by using a particular generalized point-spread function normalization and...

Imaging with Aperture Synthesis Radio Telescopes in the Presence of Direction Dependent Effects

• Abstract
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• Signal Recovery and Synthesis (SRS) 2005 paper: SMB3
• Technical Digest
• Bhatnagar, S; Cornwell, T J; Golap, K
• We describe in this paper results from our work so far in developing algorithms to solve for and fast application of direction dependent effects while imaging with interferometric...