Novel methodologies for the measurement of atmospheric turbulence effects

Richard L. Espinola; Jae Cha; Kevin Leonard

doi:10.1117/12.852294

22 April 2010 Novel methodologies for the measurement of atmospheric turbulence effects

Richard L. Espinola, Jae Cha, Kevin Leonard

Proceedings Volume 7662, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXI; 76620W (2010) https://doi.org/10.1117/12.852294
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

Abstract

Atmospheric turbulence is an imaging phenomenon that introduces blur, distortion, and intensity fluctuations that corrupt image quality and can decrease target acquisition performance. The modeling of imaging sensors requires an accurate description of turbulence effects. We present two novel methodologies for the measurement of the turbulence MTF in infrared imagery. First, the structural similarity metric is used to compare pristine and degraded imagery. Second, contrast modulations of radial bar targets are analyzed to extract an equivalent blur. Human perception tests are compared against model predictions. The results show that complex turbulence effects can be measured and modeled with simple MTF blurs.

Citation Download Citation

Richard L. Espinola, Jae Cha, and Kevin Leonard "Novel methodologies for the measurement of atmospheric turbulence effects", Proc. SPIE 7662, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXI, 76620W (22 April 2010); https://doi.org/10.1117/12.852294

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