Dr. Bobby R. Hunt Profile

Dr. Bobby R. Hunt

at KBR, Inc.

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 1 August 2021 Presentation + Paper

Block-based streaming blind deconvolution for space-variant turbulence mitigation

David Sheppard, Amber Iler, Bobby Hunt

Proceedings Volume 11836, 118360L (2021) https://doi.org/10.1117/12.2594048

KEYWORDS: Point spread functions, Associative arrays, Image processing, Deconvolution, Turbulence, Atmospheric turbulence, Atmospheric optics, Image acquisition, Algorithm development, Reconstruction algorithms

Read Abstract +

A block-based, streaming, multi-frame blind deconvolution (MFBD) mitigation method is presented for restoration of imagery impacted by space-variant atmospheric turbulence. An incremental approach is taken, referred to as “streaming”, which operates on each new frame as it arrives. For each new frame, an optimization is initiated to minimize the error between the new frame and forward modeling of the object and point spread function (PSF). To adapt to space-variant turbulence conditions, the fundamental units of operation are small, overlapping blocks of pixels extracted from the entire frame. The optimization for each new block is seeded using the solution from the same block area in the previous frame to produce a cumulative, improved, block solution. For each block, the algorithm implements stochastic gradient descent, and alternates between seeking a solution for the PSF and the object, while holding the other constant. To assist in regularizing the PSF solutions during the processing, the PSF estimate is projected onto a sparse dictionary representation of PSFs. The block solutions are combined using an overlap/add method to produce the object estimate after each frame. Our method can utilize either a Picard iterative process or a limited memory Broyden-Fletcher-Goldfarb-Shanno (L-BFGS) algorithm with bound constraints. A comparison of results is presented using data simulated with high-fidelity to real systems and environments. While incremental methods for blind deconvolution have been reported in the literature, our method has been developed explicitly for the routine mechanics of blind deconvolution.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years