Application of tilt correlation statistics to anisoplanatic optical turbulence modeling and mitigation
Abstract
Atmospheric optical turbulence can be a significant source of image degradation, particularly in long range imaging applications. Many turbulence mitigation algorithms rely on an optical transfer function (OTF) model that includes the Fried parameter. We present anisoplanatic tilt statistics for spherical wave propagation. We transform these into 2D autocorrelation functions that can inform turbulence modeling and mitigation algorithms. Using these, we construct an OTF model that accounts for image registration. We also propose a spectral ratio Fried parameter estimation algorithm that is robust to camera motion and requires no specialized scene content or sources. We employ the Fried parameter estimation and OTF model for turbulence mitigation. A numerical wave-propagation turbulence simulator is used to generate data to quantitatively validate the proposed methods. Results with real camera data are also presented.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 30, 2021
- Source ID
- 10.1364/ao.418458
Entities
People
- Michael A. Rucci
- Richard Van Hook
- Russell C Hardie
- Santasri Bose-pillai
Organizations
- Air Force Institute of Technology
- Air Force Research Laboratory
- University of Dayton